【文件下载】及解决文件名中文乱码问题
关键代码：
package com.action;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.util.ArrayList;import javax.servlet.http.HttpServletResponse;import com.entity.UserInfo;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.util.OgnlValueStack;import com.sun.xml.internal.ws.util.StringUtils;@SuppressWarnings("serial")public class LoginAction extends ActionSupport {private UserInfo user;private String jsonStr;private String msg;private ArrayList<UserInfo> userList = new ArrayList<UserInfo>();@Overridepublic String execute() {msg = "欢迎您 " + user.getUserName() + " 登陆 " + "您的密码是: "+ user.getPassword();userList.add(user);return SUCCESS;}public String downloadLocal() throws FileNotFoundException, UnsupportedEncodingException {HttpServletResponse response =(HttpServletResponse)ActionContext.getContext().get(org.apache.struts2.StrutsStatics.HTTP_RESPONSE); // 下载本地文件String fileName = URLEncoder.encode("新建 文本文档.txt", "UTF-8"); // 文件的默认保存名 解决中文乱码问题fileName = fileName.replace("+", "%20"); //当文件名中包含空格时 // 读到流中 InputStream inStream = new FileInputStream("c:/新建 文本文档.txt");// 文件的存放路径 // 设置输出的格式 response.reset(); response.setContentType("bin"); response.setCharacterEncoding("UTF-8"); response.addHeader("Content-Disposition", "attachment; filename="" + fileName + """); // 循环取出流中的数据 byte[] b = new byte[1024]; int len; try { while ((len = inStream.read(b)) > 0) response.getOutputStream().write(b, 0, len); inStream.close(); } catch (IOException e) { e.printStackTrace(); } return SUCCESS; }public String getMsg() {return msg;}public UserInfo getUser() {return user;}public void setUser(UserInfo user) {this.user = user;}public String getJsonStr() {return jsonStr;}public void setJsonStr(String jsonStr) {this.jsonStr = jsonStr;}public void setMsg(String msg) {this.msg = msg;}public ArrayList<UserInfo> getUserList() {return userList;}public void setUserList(ArrayList<UserInfo> userList) {this.userList = userList;}}
