修改了一些代码的注释，修改了文件下载会因为浏览器不同导致下载失败的问题

ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java

@@ -1,71 +1,74 @@
 package com.ruoyi.web.controller.common;
 
-import java.io.UnsupportedEncodingException;
-import java.net.URLEncoder;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
+import com.ruoyi.common.config.Global;
+import com.ruoyi.common.utils.file.FileUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
-import com.ruoyi.common.config.Global;
-import com.ruoyi.common.utils.file.FileUtils;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
 
 /**
  * 通用请求处理
- * 
+ *
  * @author ruoyi
  */
 @Controller
-public class CommonController
-{
+public class CommonController {
     private static final Logger log = LoggerFactory.getLogger(CommonController.class);
 
+    /**
+     * 文件下载
+     *
+     * @param fileName
+     * @param delete
+     * @param response
+     * @param request
+     */
     @RequestMapping("common/download")
-    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
-    {
+    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
         String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
-        try
-        {
+        try {
             String filePath = Global.getDownloadPath() + fileName;
 
             response.setCharacterEncoding("utf-8");
             response.setContentType("multipart/form-data");
             response.setHeader("Content-Disposition", "attachment;fileName=" + setFileDownloadHeader(request, realFileName));
             FileUtils.writeBytes(filePath, response.getOutputStream());
-            if (delete)
-            {
+            if (delete) {
                 FileUtils.deleteFile(filePath);
             }
-        }
-        catch (Exception e)
-        {
+        } catch (Exception e) {
             log.error("下载文件失败", e);
         }
     }
 
-    public String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException
-    {
+    /**
+     * 判断浏览器
+     *
+     * @param request
+     * @param fileName
+     * @return
+     * @throws UnsupportedEncodingException
+     */
+    public String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException {
         final String agent = request.getHeader("USER-AGENT");
         String filename = fileName;
-        if (agent.contains("MSIE"))
-        {
+        if (agent.contains("MSIE")) {
             // IE浏览器
             filename = URLEncoder.encode(filename, "utf-8");
             filename = filename.replace("+", " ");
-        }
-        else if (agent.contains("Firefox"))
-        {
+        } else if (agent.contains("Firefox")) {
             // 火狐浏览器
             filename = new String(fileName.getBytes(), "ISO8859-1");
-        }
-        else if (agent.contains("Chrome"))
-        {
+        } else if (agent.contains("Chrome")) {
             // google浏览器
             filename = URLEncoder.encode(filename, "utf-8");
-        }
-        else
-        {
+        } else {
             // 其它浏览器
             filename = URLEncoder.encode(filename, "utf-8");
         }