Java httpservletresponse 中的sendRedirect()方法的重定位乱码的总结

最近httpservletresponse 中的sendRedirect()的方法，测试其中文乱码。

测试方法是用一个简单的登录界面Login.java(纯servlet的),登录成功的话，在LoginDeal.java(纯servlet的), 中使用 httpservletresponse 中的sendRedirect()方法的重定位，重定位的目的也是个servlet文件叫MainFrame.java，要想不产生乱码，设置如下：

Login.java中：

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class Login extends HttpServlet {


public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
//response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
out.println("

用户登录

");
out.println("

");
out.println("用户名：
");
out.println("密  码：
");
out.println("
");
out.println("

");
}
}

LoginDeal.java  代码如下：

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import tools.MyTools;
import com.zy.model.*;

public class LoginDeal extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html");//这个地方要特别注意，千万不能有其他设置了！！！！！不然会出现很让人不能理解的乱码！！

PrintWriter out = response.getWriter();

String uname = request.getParameter("username");
String username = MyTools.getNewCodeString(uname);
String passwd = request.getParameter("pwd");

System.out.println("LoginDeal中uname="+uname);
System.out.println("LoginDeal中username="+username);
System.out.println("LoginDeal中passwd="+passwd);

//如果登录成功，将用户名和密码传给MainFrame
if("你好".equals(username)&&"123".equals(passwd)){
response.sendRedirect("/servlettest/MainFrame?uname="+uname+"&pwd="+passwd);//传统方式

}else{
//如果用户名和密码不正确，则跳回到登录界面
response.sendRedirect("Login");
}
}
}

MainFrame.java 代码如下：

package com.zy.view;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.zhengyi.tools.MyTools;
import com.zy.model.Users;
public class MainFrame extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}


public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");//此处就这样设置就行了~~~~

PrintWriter out = response.getWriter();

//使用传统的方法接受用户名和密码
String uname=request.getParameter("uname");
String username = MyTools.getNewCodeString(uname);
//String uname=(String)request.getAttribute("uname");

System.out.println("MainFrame中uname:"+uname);
System.out.println("MainFrame中username:"+username);

//使用传统的方法显示用户名和密码
//out.println("MainFrame中uname:"+uname+"
");
out.println("MainFrame中username="+username);
//out.println("password="+password);
}


}