解决get和post请求提交数据中文乱码问题

目录

 

get请求乱码

乱码案例

解决办法

方法一:进行转码

方法二:修改tomcat中conf/server.xml

post请求乱码

解决办法:在取参数之前设置编码格式


get请求乱码

Tomcat8以后不需要处理GET请求,默认是UTF-8编码!!!

乱码案例

一个简单的登录共能,将表单中的账号密码提交给Servlet

<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<title>Insert title here</title>
</head>
<body>
	<h2>请输入账号密码登录</h2>
	<form action="LoginServlet" method="get">
		账号:<input type="text" name="username"><br>
		密码:<input type="text" name="password"><br>
		<input type="submit" value="登录">
	</form>
</body>
</html>

提交给的Servlet

package com.zhujunwei.demo;

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 LoginServlet extends HttpServlet
{
	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		//取得用户名和密码
		String username = req.getParameter("username");
		String password = req.getParameter("password");
		System.out.println("username="+username);
		System.out.println("password="+password);
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doGet(req, resp);
	}
}

Servlet取得用户名和密码并将他们打印在控制台。

结果

只有英文,控制台得到信息

username=admin
password=123456

 用户名在出项中文时会出现乱码。

解决办法

方法一:进行转码

//取得用户名和密码
String username = req.getParameter("username");
String password = req.getParameter("password");
//进行转码
username = new String(username.getBytes("ISO-8859-1"),"UTF-8");
System.out.println("username="+username);
System.out.println("password="+password);

方法二:修改tomcat中conf/server.xml

找到

Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>

修改为

Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443" URIEncoding="UTF-8"/>

post请求乱码

解决办法:在取参数之前设置编码格式

// 取得用户名和密码
//解决post请求乱码
req.setCharacterEncoding("UTF-8");
String username = req.getParameter("username");
String password = req.getParameter("password");
System.out.println("username=" + username);
System.out.println("password=" + password);

 

posted @ 2018-12-25 20:17  雨中遐想  阅读(13)  评论(0编辑  收藏  举报  来源