diff --git a/backend/src/main/java/com/innovation/platform/controller/UserController.java b/backend/src/main/java/com/innovation/platform/controller/UserController.java
new file mode 100644
index 0000000..1dacb13
--- /dev/null
+++ b/backend/src/main/java/com/innovation/platform/controller/UserController.java
@@ -0,0 +1,161 @@
+package com.innovation.platform.controller;
+
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.innovation.platform.common.Result;
+import com.innovation.platform.entity.SysUser;
+import com.innovation.platform.service.SysUserService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.Data;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+/**
+ * 用户管理控制器
+ */
+@Tag(name = "用户管理", description = "用户 CRUD 接口")
+@RestController
+@RequestMapping("/api/users")
+@RequiredArgsConstructor
+public class UserController {
+
+    private final SysUserService sysUserService;
+
+    @Operation(summary = "获取用户列表（分页）")
+    @GetMapping
+    public Result<PageResult<SysUser>> getUserList(
+            @RequestParam(defaultValue = "1") Integer page,
+            @RequestParam(defaultValue = "10") Integer size,
+            @RequestParam(required = false) String keyword,
+            @RequestParam(required = false) Integer roleType,
+            @RequestParam(required = false) Integer status
+    ) {
+        Page<SysUser> userPage = sysUserService.getUserList(page, size, keyword, roleType, status);
+        return Result.success("查询成功", toPageResult(userPage));
+    }
+
+    @Operation(summary = "获取用户详情")
+    @GetMapping("/{id}")
+    public Result<SysUser> getUserById(@PathVariable Long id) {
+        SysUser user = sysUserService.getById(id);
+        if (user == null) {
+            return Result.error("用户不存在");
+        }
+        return Result.success("查询成功", user);
+    }
+
+    @Operation(summary = "创建用户")
+    @PostMapping
+    public Result<SysUser> createUser(@RequestBody CreateUserRequest request) {
+        try {
+            SysUser user = sysUserService.createUser(request);
+            return Result.success("创建成功", user);
+        } catch (Exception e) {
+            return Result.error(e.getMessage());
+        }
+    }
+
+    @Operation(summary = "更新用户")
+    @PutMapping("/{id}")
+    public Result<SysUser> updateUser(@PathVariable Long id, @RequestBody UpdateUserRequest request) {
+        try {
+            SysUser user = sysUserService.updateUser(id, request);
+            return Result.success("更新成功", user);
+        } catch (Exception e) {
+            return Result.error(e.getMessage());
+        }
+    }
+
+    @Operation(summary = "删除用户")
+    @DeleteMapping("/{id}")
+    public Result<Void> deleteUser(@PathVariable Long id) {
+        try {
+            sysUserService.deleteUser(id);
+            return Result.success("删除成功", null);
+        } catch (Exception e) {
+            return Result.error(e.getMessage());
+        }
+    }
+
+    @Operation(summary = "获取教师列表")
+    @GetMapping("/teachers")
+    public Result<List<SysUser>> getTeacherList() {
+        List<SysUser> teachers = sysUserService.getTeacherList();
+        return Result.success("查询成功", teachers);
+    }
+
+    @Operation(summary = "修改密码")
+    @PostMapping("/change-password")
+    public Result<Void> changePassword(
+            @RequestParam String oldPassword,
+            @RequestParam String newPassword
+    ) {
+        try {
+            sysUserService.changePassword(oldPassword, newPassword);
+            return Result.success("修改成功", null);
+        } catch (Exception e) {
+            return Result.error(e.getMessage());
+        }
+    }
+
+    @Operation(summary = "更新个人资料")
+    @PutMapping("/profile")
+    public Result<SysUser> updateProfile(@RequestBody UpdateProfileRequest request) {
+        try {
+            SysUser user = sysUserService.updateProfile(request);
+            return Result.success("更新成功", user);
+        } catch (Exception e) {
+            return Result.error(e.getMessage());
+        }
+    }
+
+    private <T> PageResult<T> toPageResult(Page<T> page) {
+        PageResult<T> result = new PageResult<>();
+        result.setList(page.getRecords());
+        result.setTotal(page.getTotal());
+        result.setPage((int) page.getCurrent());
+        result.setSize((int) page.getSize());
+        return result;
+    }
+
+    @Data
+    public static class PageResult<T> {
+        private List<T> list;
+        private Long total;
+        private Integer page;
+        private Integer size;
+    }
+
+    @Data
+    public static class CreateUserRequest {
+        private String username;
+        private String password;
+        private String realName;
+        private Integer gender;
+        private String phone;
+        private String email;
+        private String avatar;
+        private Integer roleType;
+    }
+
+    @Data
+    public static class UpdateUserRequest {
+        private String realName;
+        private Integer gender;
+        private String phone;
+        private String email;
+        private String avatar;
+        private Integer roleType;
+        private Integer status;
+    }
+
+    @Data
+    public static class UpdateProfileRequest {
+        private String realName;
+        private String phone;
+        private String email;
+        private String avatar;
+    }
+}
diff --git a/backend/src/main/java/com/innovation/platform/service/SysUserService.java b/backend/src/main/java/com/innovation/platform/service/SysUserService.java
index ddc1bcf..3a02566 100755
--- a/backend/src/main/java/com/innovation/platform/service/SysUserService.java
+++ b/backend/src/main/java/com/innovation/platform/service/SysUserService.java
@@ -1,10 +1,16 @@
 package com.innovation.platform.service;
 
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.innovation.platform.controller.UserController.CreateUserRequest;
+import com.innovation.platform.controller.UserController.UpdateProfileRequest;
+import com.innovation.platform.controller.UserController.UpdateUserRequest;
 import com.innovation.platform.dto.LoginRequest;
 import com.innovation.platform.dto.LoginResponse;
 import com.innovation.platform.dto.RegisterRequest;
 import com.innovation.platform.entity.SysUser;
 
+import java.util.List;
+
 /**
  * 用户服务接口
  */
@@ -31,7 +37,42 @@ public interface SysUserService {
     SysUser getByUsername(String username);
     
     /**
-     * 根据ID查询用户
+     * 根据 ID 查询用户
      */
     SysUser getById(Long id);
+    
+    /**
+     * 获取用户列表（分页）
+     */
+    Page<SysUser> getUserList(Integer page, Integer size, String keyword, Integer roleType, Integer status);
+    
+    /**
+     * 创建用户
+     */
+    SysUser createUser(CreateUserRequest request);
+    
+    /**
+     * 更新用户
+     */
+    SysUser updateUser(Long id, UpdateUserRequest request);
+    
+    /**
+     * 删除用户
+     */
+    void deleteUser(Long id);
+    
+    /**
+     * 获取教师列表
+     */
+    List<SysUser> getTeacherList();
+    
+    /**
+     * 修改密码
+     */
+    void changePassword(String oldPassword, String newPassword);
+    
+    /**
+     * 更新个人资料
+     */
+    SysUser updateProfile(UpdateProfileRequest request);
 }
diff --git a/backend/src/main/java/com/innovation/platform/service/impl/SysUserServiceImpl.java b/backend/src/main/java/com/innovation/platform/service/impl/SysUserServiceImpl.java
index aa39168..d2a40b1 100755
--- a/backend/src/main/java/com/innovation/platform/service/impl/SysUserServiceImpl.java
+++ b/backend/src/main/java/com/innovation/platform/service/impl/SysUserServiceImpl.java
@@ -3,6 +3,10 @@ package com.innovation.platform.service.impl;
 import cn.dev33.satoken.stp.StpUtil;
 import cn.hutool.crypto.digest.BCrypt;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.innovation.platform.controller.UserController.CreateUserRequest;
+import com.innovation.platform.controller.UserController.UpdateProfileRequest;
+import com.innovation.platform.controller.UserController.UpdateUserRequest;
 import com.innovation.platform.dto.LoginRequest;
 import com.innovation.platform.dto.LoginResponse;
 import com.innovation.platform.dto.RegisterRequest;
@@ -12,6 +16,9 @@ import com.innovation.platform.service.SysUserService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
+
+import java.util.List;
 
 /**
  * 用户服务实现类
@@ -93,4 +100,169 @@ public class SysUserServiceImpl implements SysUserService {
     public SysUser getById(Long id) {
         return sysUserMapper.selectById(id);
     }
+
+    @Override
+    public Page<SysUser> getUserList(Integer page, Integer size, String keyword, Integer roleType, Integer status) {
+        Page<SysUser> userPage = new Page<>(page, size);
+        
+        LambdaQueryWrapper<SysUser> wrapper = new LambdaQueryWrapper<>();
+        
+        // 关键词搜索（用户名、姓名、手机号）
+        if (StringUtils.hasText(keyword)) {
+            wrapper.and(w -> w
+                    .like(SysUser::getUsername, keyword)
+                    .or()
+                    .like(SysUser::getRealName, keyword)
+                    .or()
+                    .like(SysUser::getPhone, keyword)
+            );
+        }
+        
+        // 角色类型过滤
+        if (roleType != null) {
+            wrapper.eq(SysUser::getRoleType, roleType);
+        }
+        
+        // 状态过滤
+        if (status != null) {
+            wrapper.eq(SysUser::getStatus, status);
+        }
+        
+        return sysUserMapper.selectPage(userPage, wrapper);
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public SysUser createUser(CreateUserRequest request) {
+        // 检查用户名是否已存在
+        if (getByUsername(request.getUsername()) != null) {
+            throw new RuntimeException("用户名已存在");
+        }
+        
+        // 检查邮箱是否已存在
+        if (StringUtils.hasText(request.getEmail()) && getByEmail(request.getEmail()) != null) {
+            throw new RuntimeException("邮箱已被使用");
+        }
+        
+        // 创建用户
+        SysUser user = new SysUser();
+        user.setUsername(request.getUsername());
+        user.setPassword(BCrypt.hashpw(request.getPassword() != null ? request.getPassword() : "123456"));
+        user.setRealName(request.getRealName());
+        user.setGender(request.getGender());
+        user.setPhone(request.getPhone());
+        user.setEmail(request.getEmail());
+        user.setAvatar(request.getAvatar());
+        user.setRoleType(request.getRoleType() != null ? request.getRoleType() : 0);
+        user.setStatus(1);
+        
+        sysUserMapper.insert(user);
+        return user;
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public SysUser updateUser(Long id, UpdateUserRequest request) {
+        SysUser user = sysUserMapper.selectById(id);
+        if (user == null) {
+            throw new RuntimeException("用户不存在");
+        }
+        
+        // 检查邮箱是否已被其他用户使用
+        if (StringUtils.hasText(request.getEmail())) {
+            SysUser existUser = getByEmail(request.getEmail());
+            if (existUser != null && !existUser.getId().equals(id)) {
+                throw new RuntimeException("邮箱已被其他用户使用");
+            }
+            user.setEmail(request.getEmail());
+        }
+        
+        user.setRealName(request.getRealName());
+        user.setGender(request.getGender());
+        user.setPhone(request.getPhone());
+        user.setAvatar(request.getAvatar());
+        user.setRoleType(request.getRoleType());
+        user.setStatus(request.getStatus());
+        
+        sysUserMapper.updateById(user);
+        return user;
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void deleteUser(Long id) {
+        SysUser user = sysUserMapper.selectById(id);
+        if (user == null) {
+            throw new RuntimeException("用户不存在");
+        }
+        
+        sysUserMapper.deleteById(id);
+    }
+
+    @Override
+    public List<SysUser> getTeacherList() {
+        return sysUserMapper.selectList(
+                new LambdaQueryWrapper<SysUser>()
+                        .eq(SysUser::getRoleType, 1)  // 1 = 教师
+                        .eq(SysUser::getStatus, 1)     // 只查询启用的用户
+        );
+    }
+
+    @Override
+    public void changePassword(String oldPassword, String newPassword) {
+        // 获取当前登录用户
+        Long userId = StpUtil.getLoginIdAsLong();
+        SysUser user = sysUserMapper.selectById(userId);
+        
+        if (user == null) {
+            throw new RuntimeException("用户不存在");
+        }
+        
+        // 验证旧密码
+        if (!BCrypt.checkpw(oldPassword, user.getPassword())) {
+            throw new RuntimeException("旧密码错误");
+        }
+        
+        // 更新密码
+        user.setPassword(BCrypt.hashpw(newPassword));
+        sysUserMapper.updateById(user);
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public SysUser updateProfile(UpdateProfileRequest request) {
+        // 获取当前登录用户
+        Long userId = StpUtil.getLoginIdAsLong();
+        SysUser user = sysUserMapper.selectById(userId);
+        
+        if (user == null) {
+            throw new RuntimeException("用户不存在");
+        }
+        
+        // 检查邮箱是否已被其他用户使用
+        if (StringUtils.hasText(request.getEmail())) {
+            SysUser existUser = getByEmail(request.getEmail());
+            if (existUser != null && !existUser.getId().equals(userId)) {
+                throw new RuntimeException("邮箱已被其他用户使用");
+            }
+            user.setEmail(request.getEmail());
+        }
+        
+        user.setRealName(request.getRealName());
+        user.setPhone(request.getPhone());
+        user.setAvatar(request.getAvatar());
+        
+        sysUserMapper.updateById(user);
+        return user;
+    }
+
+    /**
+     * 根据邮箱查询用户
+     */
+    private SysUser getByEmail(String email) {
+        return sysUserMapper.selectOne(
+                new LambdaQueryWrapper<SysUser>()
+                        .eq(SysUser::getEmail, email)
+        );
+    }
 }
diff --git a/backend/src/main/resources/data.sql b/backend/src/main/resources/data.sql
index 1455eb6..416ef47 100755
--- a/backend/src/main/resources/data.sql
+++ b/backend/src/main/resources/data.sql
@@ -1,38 +1,38 @@
 -- 预埋测试数据
 
 -- 1. 管理员账号 (密码: admin123)
-INSERT INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
+INSERT IGNORE INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
 ('admin', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '系统管理员', 1, 3, 1);
 
 -- 2. 教师账号 (密码: teacher123)
-INSERT INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
+INSERT IGNORE INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
 ('teacher001', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '张教授', 1, 2, 1),
 ('teacher002', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '李老师', 2, 2, 1);
 
 -- 3. 学生账号 (密码: student123)
-INSERT INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
+INSERT IGNORE INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
 ('student001', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '王小明', 1, 1, 1),
 ('student002', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '李小红', 2, 1, 1),
 ('student003', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '张小华', 1, 1, 1);
 
 -- 4. 教师信息
-INSERT INTO teacher_info (user_id, teacher_no, college, title, research_field) VALUES
+INSERT IGNORE INTO teacher_info (user_id, teacher_no, college, title, research_field) VALUES
 (2, 'T2024001', '计算机学院', '教授', '人工智能'),
 (3, 'T2024002', '计算机学院', '副教授', '大数据');
 
 -- 5. 学生信息
-INSERT INTO stu_info (user_id, student_no, college, major, grade, class_name, advisor_id) VALUES
+INSERT IGNORE INTO stu_info (user_id, student_no, college, major, grade, class_name, advisor_id) VALUES
 (4, 'S2021001', '计算机学院', '计算机科学与技术', '2021', '计科2101', 2),
 (5, 'S2021002', '计算机学院', '软件工程', '2021', '软工2101', 2),
 (6, 'S2022001', '计算机学院', '计算机科学与技术', '2022', '计科2201', 3);
 
 -- 6. 测试项目
-INSERT INTO project (project_no, project_name, project_type, project_level, leader_id, advisor_id, description, status) VALUES
+INSERT IGNORE INTO project (project_no, project_name, project_type, project_level, leader_id, advisor_id, description, status) VALUES
 ('PRJ2024001', '基于AI的智能问答系统', 1, 2, 4, 2, '本项目旨在开发一个基于大语言模型的智能问答系统', 3),
 ('PRJ2024002', '校园二手交易平台', 2, 1, 5, 3, '搭建一个面向高校学生的二手物品交易平台', 1);
 
 -- 7. 项目成员
-INSERT INTO project_member (project_id, user_id, member_order, role) VALUES
+INSERT IGNORE INTO project_member (project_id, user_id, member_order, role) VALUES
 (1, 4, 1, 2),
 (1, 5, 2, 1),
 (2, 5, 1, 2),
diff --git a/backend/src/main/resources/db/migration/V2__add_user_unique_constraints.sql b/backend/src/main/resources/db/migration/V2__add_user_unique_constraints.sql
new file mode 100644
index 0000000..c2181c4
--- /dev/null
+++ b/backend/src/main/resources/db/migration/V2__add_user_unique_constraints.sql
@@ -0,0 +1,40 @@
+-- V2: 为 sys_user 表添加唯一约束
+-- 执行时间：2026-03-13
+
+-- 1. 先清理可能存在的重复数据（保留 ID 最小的记录）
+-- 删除重复的用户名（保留 id 最小的）
+DELETE FROM sys_user 
+WHERE id NOT IN (
+    SELECT id FROM (
+        SELECT MIN(id) as id
+        FROM sys_user
+        WHERE username IS NOT NULL
+        GROUP BY username
+    ) as tmp
+);
+
+-- 删除重复的邮箱（保留 id 最小的）
+DELETE FROM sys_user 
+WHERE id NOT IN (
+    SELECT id FROM (
+        SELECT MIN(id) as id
+        FROM sys_user
+        WHERE email IS NOT NULL
+        GROUP BY email
+    ) as tmp
+);
+
+-- 2. 为 username 添加唯一约束
+ALTER TABLE sys_user 
+ADD CONSTRAINT uk_username UNIQUE (username);
+
+-- 3. 为 email 添加唯一约束
+ALTER TABLE sys_user 
+ADD CONSTRAINT uk_email UNIQUE (email);
+
+-- 4. 为 phone 添加索引（不唯一，因为可能有没有手机号的情况）
+CREATE INDEX idx_phone ON sys_user(phone);
+
+-- 5. 为 role_type 和 status 添加索引，优化查询性能
+CREATE INDEX idx_role_type ON sys_user(role_type);
+CREATE INDEX idx_status ON sys_user(status);
diff --git a/backend/src/main/resources/schema.sql b/backend/src/main/resources/schema.sql
index 65dee80..aa62346 100755
--- a/backend/src/main/resources/schema.sql
+++ b/backend/src/main/resources/schema.sql
@@ -16,7 +16,11 @@ CREATE TABLE IF NOT EXISTS sys_user (
   update_by BIGINT DEFAULT NULL,
   deleted TINYINT DEFAULT 0,
   PRIMARY KEY (id),
-  UNIQUE KEY uk_username (username)
+  UNIQUE KEY uk_username (username),
+  UNIQUE KEY uk_email (email),
+  KEY idx_phone (phone),
+  KEY idx_role_type (role_type),
+  KEY idx_status (status)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 -- 创建学生信息表
diff --git a/backend/target/classes/com/innovation/platform/InnovationPlatformApplication.class b/backend/target/classes/com/innovation/platform/InnovationPlatformApplication.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/common/PageResult.class b/backend/target/classes/com/innovation/platform/common/PageResult.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/common/Result.class b/backend/target/classes/com/innovation/platform/common/Result.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/config/SaTokenConfig.class b/backend/target/classes/com/innovation/platform/config/SaTokenConfig.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/controller/AuthController.class b/backend/target/classes/com/innovation/platform/controller/AuthController.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/controller/ProjectController.class b/backend/target/classes/com/innovation/platform/controller/ProjectController.class
new file mode 100644
index 0000000..94c0c44
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diff --git a/backend/target/classes/com/innovation/platform/controller/UserController$CreateUserRequest.class b/backend/target/classes/com/innovation/platform/controller/UserController$CreateUserRequest.class
new file mode 100644
index 0000000..2a89086
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diff --git a/backend/target/classes/com/innovation/platform/controller/UserController$PageResult.class b/backend/target/classes/com/innovation/platform/controller/UserController$PageResult.class
new file mode 100644
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diff --git a/backend/target/classes/com/innovation/platform/controller/UserController$UpdateProfileRequest.class b/backend/target/classes/com/innovation/platform/controller/UserController$UpdateProfileRequest.class
new file mode 100644
index 0000000..5c763c6
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diff --git a/backend/target/classes/com/innovation/platform/controller/UserController$UpdateUserRequest.class b/backend/target/classes/com/innovation/platform/controller/UserController$UpdateUserRequest.class
new file mode 100644
index 0000000..271bbe4
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diff --git a/backend/target/classes/com/innovation/platform/controller/UserController.class b/backend/target/classes/com/innovation/platform/controller/UserController.class
new file mode 100644
index 0000000..436004b
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/controller/UserController.class differ
diff --git a/backend/target/classes/com/innovation/platform/dto/LoginRequest.class b/backend/target/classes/com/innovation/platform/dto/LoginRequest.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/dto/LoginResponse$LoginResponseBuilder.class b/backend/target/classes/com/innovation/platform/dto/LoginResponse$LoginResponseBuilder.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/dto/LoginResponse.class b/backend/target/classes/com/innovation/platform/dto/LoginResponse.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/dto/ProjectQueryRequest.class b/backend/target/classes/com/innovation/platform/dto/ProjectQueryRequest.class
new file mode 100644
index 0000000..f76d49a
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/dto/ProjectQueryRequest.class differ
diff --git a/backend/target/classes/com/innovation/platform/dto/ProjectRequest.class b/backend/target/classes/com/innovation/platform/dto/ProjectRequest.class
new file mode 100644
index 0000000..c971fe7
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/dto/ProjectRequest.class differ
diff --git a/backend/target/classes/com/innovation/platform/dto/ProjectResponse$ProjectResponseBuilder.class b/backend/target/classes/com/innovation/platform/dto/ProjectResponse$ProjectResponseBuilder.class
new file mode 100644
index 0000000..80e655b
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/dto/ProjectResponse$ProjectResponseBuilder.class differ
diff --git a/backend/target/classes/com/innovation/platform/dto/ProjectResponse.class b/backend/target/classes/com/innovation/platform/dto/ProjectResponse.class
new file mode 100644
index 0000000..439560c
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/dto/ProjectResponse.class differ
diff --git a/backend/target/classes/com/innovation/platform/dto/RegisterRequest.class b/backend/target/classes/com/innovation/platform/dto/RegisterRequest.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/Achievement.class b/backend/target/classes/com/innovation/platform/entity/Achievement.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/AchievementAttachment.class b/backend/target/classes/com/innovation/platform/entity/AchievementAttachment.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/BaseEntity.class b/backend/target/classes/com/innovation/platform/entity/BaseEntity.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/Project.class b/backend/target/classes/com/innovation/platform/entity/Project.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/ProjectAttachment.class b/backend/target/classes/com/innovation/platform/entity/ProjectAttachment.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/ProjectMember.class b/backend/target/classes/com/innovation/platform/entity/ProjectMember.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/Review.class b/backend/target/classes/com/innovation/platform/entity/Review.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/ReviewScoreItem.class b/backend/target/classes/com/innovation/platform/entity/ReviewScoreItem.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/StuInfo.class b/backend/target/classes/com/innovation/platform/entity/StuInfo.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/SysConfig.class b/backend/target/classes/com/innovation/platform/entity/SysConfig.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/SysLog.class b/backend/target/classes/com/innovation/platform/entity/SysLog.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/SysUser.class b/backend/target/classes/com/innovation/platform/entity/SysUser.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/entity/TeacherInfo.class b/backend/target/classes/com/innovation/platform/entity/TeacherInfo.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/exception/GlobalExceptionHandler.class b/backend/target/classes/com/innovation/platform/exception/GlobalExceptionHandler.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/mapper/ProjectMapper.class b/backend/target/classes/com/innovation/platform/mapper/ProjectMapper.class
new file mode 100644
index 0000000..00dddb8
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/mapper/ProjectMapper.class differ
diff --git a/backend/target/classes/com/innovation/platform/mapper/SysUserMapper.class b/backend/target/classes/com/innovation/platform/mapper/SysUserMapper.class
old mode 100755
new mode 100644
diff --git a/backend/target/classes/com/innovation/platform/service/ProjectService.class b/backend/target/classes/com/innovation/platform/service/ProjectService.class
new file mode 100644
index 0000000..ae44d84
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/service/ProjectService.class differ
diff --git a/backend/target/classes/com/innovation/platform/service/SysUserService.class b/backend/target/classes/com/innovation/platform/service/SysUserService.class
old mode 100755
new mode 100644
index 89a924a..19b7669
Binary files a/backend/target/classes/com/innovation/platform/service/SysUserService.class and b/backend/target/classes/com/innovation/platform/service/SysUserService.class differ
diff --git a/backend/target/classes/com/innovation/platform/service/impl/ProjectServiceImpl.class b/backend/target/classes/com/innovation/platform/service/impl/ProjectServiceImpl.class
new file mode 100644
index 0000000..c3555dc
Binary files /dev/null and b/backend/target/classes/com/innovation/platform/service/impl/ProjectServiceImpl.class differ
diff --git a/backend/target/classes/com/innovation/platform/service/impl/SysUserServiceImpl.class b/backend/target/classes/com/innovation/platform/service/impl/SysUserServiceImpl.class
old mode 100755
new mode 100644
index da5089f..5babcbb
Binary files a/backend/target/classes/com/innovation/platform/service/impl/SysUserServiceImpl.class and b/backend/target/classes/com/innovation/platform/service/impl/SysUserServiceImpl.class differ
diff --git a/backend/target/classes/data.sql b/backend/target/classes/data.sql
index 1455eb6..416ef47 100755
--- a/backend/target/classes/data.sql
+++ b/backend/target/classes/data.sql
@@ -1,38 +1,38 @@
 -- 预埋测试数据
 
 -- 1. 管理员账号 (密码: admin123)
-INSERT INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
+INSERT IGNORE INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
 ('admin', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '系统管理员', 1, 3, 1);
 
 -- 2. 教师账号 (密码: teacher123)
-INSERT INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
+INSERT IGNORE INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
 ('teacher001', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '张教授', 1, 2, 1),
 ('teacher002', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '李老师', 2, 2, 1);
 
 -- 3. 学生账号 (密码: student123)
-INSERT INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
+INSERT IGNORE INTO sys_user (username, password, real_name, gender, role_type, status) VALUES
 ('student001', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '王小明', 1, 1, 1),
 ('student002', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '李小红', 2, 1, 1),
 ('student003', '$2a$10$N.zmdr9k7uOCQb376NoUnuTJ8iAt6Z5EHsM8lE9lBOsl7iAt9hQIu', '张小华', 1, 1, 1);
 
 -- 4. 教师信息
-INSERT INTO teacher_info (user_id, teacher_no, college, title, research_field) VALUES
+INSERT IGNORE INTO teacher_info (user_id, teacher_no, college, title, research_field) VALUES
 (2, 'T2024001', '计算机学院', '教授', '人工智能'),
 (3, 'T2024002', '计算机学院', '副教授', '大数据');
 
 -- 5. 学生信息
-INSERT INTO stu_info (user_id, student_no, college, major, grade, class_name, advisor_id) VALUES
+INSERT IGNORE INTO stu_info (user_id, student_no, college, major, grade, class_name, advisor_id) VALUES
 (4, 'S2021001', '计算机学院', '计算机科学与技术', '2021', '计科2101', 2),
 (5, 'S2021002', '计算机学院', '软件工程', '2021', '软工2101', 2),
 (6, 'S2022001', '计算机学院', '计算机科学与技术', '2022', '计科2201', 3);
 
 -- 6. 测试项目
-INSERT INTO project (project_no, project_name, project_type, project_level, leader_id, advisor_id, description, status) VALUES
+INSERT IGNORE INTO project (project_no, project_name, project_type, project_level, leader_id, advisor_id, description, status) VALUES
 ('PRJ2024001', '基于AI的智能问答系统', 1, 2, 4, 2, '本项目旨在开发一个基于大语言模型的智能问答系统', 3),
 ('PRJ2024002', '校园二手交易平台', 2, 1, 5, 3, '搭建一个面向高校学生的二手物品交易平台', 1);
 
 -- 7. 项目成员
-INSERT INTO project_member (project_id, user_id, member_order, role) VALUES
+INSERT IGNORE INTO project_member (project_id, user_id, member_order, role) VALUES
 (1, 4, 1, 2),
 (1, 5, 2, 1),
 (2, 5, 1, 2),
diff --git a/backend/target/classes/db/migration/V2__add_user_unique_constraints.sql b/backend/target/classes/db/migration/V2__add_user_unique_constraints.sql
new file mode 100644
index 0000000..c2181c4
--- /dev/null
+++ b/backend/target/classes/db/migration/V2__add_user_unique_constraints.sql
@@ -0,0 +1,40 @@
+-- V2: 为 sys_user 表添加唯一约束
+-- 执行时间：2026-03-13
+
+-- 1. 先清理可能存在的重复数据（保留 ID 最小的记录）
+-- 删除重复的用户名（保留 id 最小的）
+DELETE FROM sys_user 
+WHERE id NOT IN (
+    SELECT id FROM (
+        SELECT MIN(id) as id
+        FROM sys_user
+        WHERE username IS NOT NULL
+        GROUP BY username
+    ) as tmp
+);
+
+-- 删除重复的邮箱（保留 id 最小的）
+DELETE FROM sys_user 
+WHERE id NOT IN (
+    SELECT id FROM (
+        SELECT MIN(id) as id
+        FROM sys_user
+        WHERE email IS NOT NULL
+        GROUP BY email
+    ) as tmp
+);
+
+-- 2. 为 username 添加唯一约束
+ALTER TABLE sys_user 
+ADD CONSTRAINT uk_username UNIQUE (username);
+
+-- 3. 为 email 添加唯一约束
+ALTER TABLE sys_user 
+ADD CONSTRAINT uk_email UNIQUE (email);
+
+-- 4. 为 phone 添加索引（不唯一，因为可能有没有手机号的情况）
+CREATE INDEX idx_phone ON sys_user(phone);
+
+-- 5. 为 role_type 和 status 添加索引，优化查询性能
+CREATE INDEX idx_role_type ON sys_user(role_type);
+CREATE INDEX idx_status ON sys_user(status);
diff --git a/backend/target/classes/schema.sql b/backend/target/classes/schema.sql
index 65dee80..aa62346 100755
--- a/backend/target/classes/schema.sql
+++ b/backend/target/classes/schema.sql
@@ -16,7 +16,11 @@ CREATE TABLE IF NOT EXISTS sys_user (
   update_by BIGINT DEFAULT NULL,
   deleted TINYINT DEFAULT 0,
   PRIMARY KEY (id),
-  UNIQUE KEY uk_username (username)
+  UNIQUE KEY uk_username (username),
+  UNIQUE KEY uk_email (email),
+  KEY idx_phone (phone),
+  KEY idx_role_type (role_type),
+  KEY idx_status (status)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 -- 创建学生信息表
diff --git a/backend/target/innovation-platform-1.0.0.jar b/backend/target/innovation-platform-1.0.0.jar
deleted file mode 100755
index edfd390..0000000
Binary files a/backend/target/innovation-platform-1.0.0.jar and /dev/null differ
diff --git a/backend/target/innovation-platform-1.0.0.jar.original b/backend/target/innovation-platform-1.0.0.jar.original
deleted file mode 100755
index b764df0..0000000
Binary files a/backend/target/innovation-platform-1.0.0.jar.original and /dev/null differ
diff --git a/backend/target/maven-archiver/pom.properties b/backend/target/maven-archiver/pom.properties
deleted file mode 100755
index 390a8a5..0000000
--- a/backend/target/maven-archiver/pom.properties
+++ /dev/null
@@ -1,3 +0,0 @@
-artifactId=innovation-platform
-groupId=com.innovation
-version=1.0.0
diff --git a/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst b/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
old mode 100755
new mode 100644
index 637ce73..e9003c4
--- a/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
+++ b/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
@@ -1,10 +1,16 @@
 com/innovation/platform/service/impl/SysUserServiceImpl.class
+com/innovation/platform/service/ProjectService.class
 com/innovation/platform/common/Result.class
+com/innovation/platform/dto/ProjectQueryRequest.class
+com/innovation/platform/controller/UserController$PageResult.class
+com/innovation/platform/controller/ProjectController.class
 com/innovation/platform/dto/LoginResponse$LoginResponseBuilder.class
 com/innovation/platform/entity/StuInfo.class
 com/innovation/platform/dto/RegisterRequest.class
 com/innovation/platform/dto/LoginResponse.class
 com/innovation/platform/entity/BaseEntity.class
+com/innovation/platform/controller/UserController$UpdateUserRequest.class
+com/innovation/platform/dto/ProjectResponse.class
 com/innovation/platform/InnovationPlatformApplication.class
 com/innovation/platform/entity/ProjectMember.class
 com/innovation/platform/entity/ReviewScoreItem.class
@@ -15,12 +21,19 @@ com/innovation/platform/entity/ProjectAttachment.class
 com/innovation/platform/entity/SysUser.class
 com/innovation/platform/entity/Review.class
 com/innovation/platform/dto/LoginRequest.class
+com/innovation/platform/controller/UserController$UpdateProfileRequest.class
+com/innovation/platform/controller/UserController.class
 com/innovation/platform/exception/GlobalExceptionHandler.class
 com/innovation/platform/mapper/SysUserMapper.class
 com/innovation/platform/entity/TeacherInfo.class
+com/innovation/platform/dto/ProjectResponse$ProjectResponseBuilder.class
 com/innovation/platform/entity/SysLog.class
+com/innovation/platform/mapper/ProjectMapper.class
+com/innovation/platform/dto/ProjectRequest.class
+com/innovation/platform/controller/UserController$CreateUserRequest.class
 com/innovation/platform/entity/Project.class
 com/innovation/platform/config/SaTokenConfig.class
 com/innovation/platform/entity/SysConfig.class
+com/innovation/platform/service/impl/ProjectServiceImpl.class
 com/innovation/platform/entity/AchievementAttachment.class
 com/innovation/platform/entity/Achievement.class
diff --git a/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst b/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
old mode 100755
new mode 100644
index 31adbf5..90dce7f
--- a/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
+++ b/backend/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
@@ -3,13 +3,20 @@
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/SysConfig.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/InnovationPlatformApplication.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/mapper/SysUserMapper.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/service/impl/ProjectServiceImpl.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/dto/RegisterRequest.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/SysLog.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/dto/ProjectQueryRequest.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/exception/GlobalExceptionHandler.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/service/SysUserService.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/service/ProjectService.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/BaseEntity.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/controller/AuthController.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/controller/ProjectController.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/dto/ProjectRequest.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/common/Result.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/dto/ProjectResponse.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/mapper/ProjectMapper.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/ProjectMember.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/dto/LoginResponse.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/service/impl/SysUserServiceImpl.java
@@ -21,5 +28,6 @@
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/Review.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/Achievement.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/ProjectAttachment.java
+/home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/controller/UserController.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/SysUser.java
 /home/llm/projects/innovation-platform/backend/src/main/java/com/innovation/platform/entity/TeacherInfo.java
diff --git a/backend/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst b/backend/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst
deleted file mode 100755
index e69de29..0000000
diff --git a/backend/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst b/backend/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst
deleted file mode 100755
index e69de29..0000000
diff --git a/docker-compose.yml b/docker-compose.yml
index 617965d..8b816bb 100755
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -25,7 +25,7 @@ services:
       SPRING_DATASOURCE_USERNAME: innovation
       SPRING_DATASOURCE_PASSWORD: innovation123
     ports:
-      - "8080:8080"
+      - "127.0.0.1:8081:8080"
     networks:
       - innovation-network