Javaweb中关于GET和POST方式乱码问题

都快2020了，以GET方式提交表单不需要转码了！！

在很多时候，由于编码问题导致的乱码问题很常见，因为GBK，iso-8859-1等编码不支持中文

1.以下是我的测试代码：

package com.lcl.encoder;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ErrorCode extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//		request.setCharacterEncoding("utf-8");
		//将iso-8859-1转码为utf-8
		String name = new String (request.getParameter("name").getBytes("iso-8859-1"),"utf-8");
		String password = new String(request.getParameter("password").getBytes("iso-8859-1"),"utf-8");
		System.out.println(request.getMethod()+"以方式提交表单");
		System.out.println(name+":"+password);	
	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}
}

以GET方式提交出现了乱码

以POST方式提交

2.总结

1.以GET方式提交服务器使用了utf-8编码，所以不需要改编码
2.以POST方式提交，服务器使用iso-8859-1编码

3.解决方法

1.setCharacterEncoding方法

//设置编码为utf-8
request.setCharacterEncoding("utf-8");

2.手动解码，然后转码

 	//方法一
	String name = request.getParameter("name");
	name = URLEncoder.encode(name,"iso-8859-1");
	name = URLDecoder.decode(name, "utf-8");
	//方法二
	String name = request.getParameter("name");
	name = new String (name.getBytes("iso-8859-1"),"utf-8");