116 lines
3.9 KiB
Java
116 lines
3.9 KiB
Java
package com.example.demo.controller;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.web.bind.annotation.*;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* 学习示例控制器
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*
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* 学习点：
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* - 各种参数接收方式
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* - 配置注入
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* - 响应格式
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*/
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@RestController
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public class LearnController {
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// 从配置文件注入值
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@Value("${spring.application.name:demo}")
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private String appName;
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/**
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* 根路径 - 重定向到学习中心
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*/
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@GetMapping("/")
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public Map<String, Object> root() {
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Map<String, Object> info = new HashMap<>();
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info.put("message", "欢迎来到 Spring Boot 学习脚手架！");
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info.put("learn", "https://spring.xiaoxiaoluohao.indevs.in/learn");
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info.put("aop", "https://spring.xiaoxiaoluohao.indevs.in/aop");
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info.put("api", "https://spring.xiaoxiaoluohao.indevs.in/api/users");
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return info;
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}
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// GET /learn - API 信息
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@GetMapping("/learn")
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public Map<String, Object> info() {
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Map<String, Object> info = new HashMap<>();
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info.put("app", appName);
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info.put("message", "欢迎学习 Spring Boot！");
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info.put("endpoints", new String[]{
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"GET /learn/params?name=xxx&age=18 - 参数示例",
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"POST /learn/body - JSON 请求体示例",
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"GET /learn/path/{id} - 路径变量示例",
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"GET /learn/header - 请求头示例",
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"GET /learn/cookie - Cookie 示例"
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});
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return info;
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}
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// GET /learn/params?name=xxx&age=18 - 查询参数
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@GetMapping("/learn/params")
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public Map<String, Object> params(
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@RequestParam(required = false, defaultValue = "游客") String name,
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@RequestParam(required = false, defaultValue = "0") Integer age
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) {
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Map<String, Object> result = new HashMap<>();
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result.put("name", name);
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result.put("age", age);
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result.put("tip", "使用 @RequestParam 接收查询参数");
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return result;
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}
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// POST /learn/body - 请求体
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@PostMapping("/learn/body")
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public Map<String, Object> body(@RequestBody Map<String, Object> data) {
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Map<String, Object> result = new HashMap<>();
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result.put("received", data);
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result.put("tip", "使用 @RequestBody 接收 JSON 请求体");
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return result;
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}
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// GET /learn/path/{id} - 路径变量
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@GetMapping("/learn/path/{id}")
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public Map<String, Object> path(@PathVariable String id) {
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Map<String, Object> result = new HashMap<>();
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result.put("id", id);
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result.put("tip", "使用 @PathVariable 接收路径变量");
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return result;
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}
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// GET /learn/header - 请求头
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@GetMapping("/learn/header")
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public Map<String, Object> header(@RequestHeader(value = "User-Agent", required = false) String userAgent) {
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Map<String, Object> result = new HashMap<>();
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result.put("userAgent", userAgent);
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result.put("tip", "使用 @RequestHeader 获取请求头");
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return result;
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}
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// GET /learn/cookie - Cookie
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@GetMapping("/learn/cookie")
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public Map<String, Object> cookie(@CookieValue(value = "JSESSIONID", required = false) String sessionId) {
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Map<String, Object> result = new HashMap<>();
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result.put("sessionId", sessionId);
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result.put("tip", "使用 @CookieValue 获取 Cookie");
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return result;
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}
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// GET /learn/exception - 异常处理
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@GetMapping("/learn/exception")
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public String exception() {
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throw new RuntimeException("这是一个测试异常");
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}
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// 全局异常处理
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@ExceptionHandler(RuntimeException.class)
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public Map<String, Object> handleException(RuntimeException e) {
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Map<String, Object> result = new HashMap<>();
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result.put("error", e.getMessage());
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result.put("tip", "使用 @ExceptionHandler 处理异常");
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return result;
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}
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} |