feat: expand struts demo lab

web/WEB-INF/classes/com/demo/action/FileUploadAction.java

@@ -0,0 +1,93 @@
+package com.demo.action;
+
+import com.opensymphony.xwork2.ActionSupport;
+
+import java.io.File;
+import java.util.List;
+
+public class FileUploadAction extends ActionSupport {
+
+    private File upload;
+    private String uploadFileName;
+    private String uploadContentType;
+    private List<File> uploads;
+    private List<String> uploadsFileName;
+    private List<String> uploadsContentType;
+    private int fileCount;
+    private String summary;
+
+    @Override
+    public String execute() {
+        fileCount = 0;
+        if (upload != null) {
+            fileCount++;
+        }
+        if (uploads != null) {
+            fileCount += uploads.size();
+        }
+
+        if (fileCount == 0) {
+            addActionError("Select at least one file before submitting the demo.");
+            return INPUT;
+        }
+
+        summary = "This demo captures upload metadata only. It does not persist files to disk, which keeps the sample safe for classroom use.";
+        return SUCCESS;
+    }
+
+    public File getUpload() {
+        return upload;
+    }
+
+    public void setUpload(File upload) {
+        this.upload = upload;
+    }
+
+    public String getUploadFileName() {
+        return uploadFileName;
+    }
+
+    public void setUploadFileName(String uploadFileName) {
+        this.uploadFileName = uploadFileName;
+    }
+
+    public String getUploadContentType() {
+        return uploadContentType;
+    }
+
+    public void setUploadContentType(String uploadContentType) {
+        this.uploadContentType = uploadContentType;
+    }
+
+    public List<File> getUploads() {
+        return uploads;
+    }
+
+    public void setUploads(List<File> uploads) {
+        this.uploads = uploads;
+    }
+
+    public List<String> getUploadsFileName() {
+        return uploadsFileName;
+    }
+
+    public void setUploadsFileName(List<String> uploadsFileName) {
+        this.uploadsFileName = uploadsFileName;
+    }
+
+    public List<String> getUploadsContentType() {
+        return uploadsContentType;
+    }
+
+    public void setUploadsContentType(List<String> uploadsContentType) {
+        this.uploadsContentType = uploadsContentType;
+    }
+
+    public int getFileCount() {
+        return fileCount;
+    }
+
+    public String getSummary() {
+        return summary;
+    }
+}