Servlet中文乱码问题解决办法

首先对于源jsp网站和servlet里面的字符集要一样,一般支持中文的字符集为UTF-8最好采用这个字符集(除此之外还有gb2312);

对于源jsp文件的代码中需要设置

设置你的page里面的字符集

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

 设置html文件里面的字符集

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

如果对于参数通过get方法进行传参的话,有两种方法:

方法一:
在tomcat里面设置字符集为UTF-8

修改server.xml
<Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" URIEncoding="utf-8"/>
* 必须有修改tomcat服务器配置文件权限

方法二:通过对servlet里面的进行设置:

			response.setHeader("Content-Type", "text/html;charset=UTF-8");//设置UTF-8的显示页面的类型和字符集
				username = new String(username.getBytes("ISO8859-1"),"utf-8");//根据你的tomcat里面的字符集进行对中文进行转换,将iso转换为UTF-8

如果对于参数通过post方法进行传参的话,则设置为:

		response.setHeader("Content-Type", "text/html;charset=UTF-8");//设置UTF-8的显示页面的类型和字符集
		request.setCharacterEncoding("utf-8"); //设置通过post方法进行传参的字符集

在这里需要注意的是:

1.对于post和get传参的时候解决中文乱码问题的时候一定要分清楚是哪种方式传参,是post就得用post不然会没用的

2.对于两种不同的地方不能合用,乱码问题解决不了的。

下面附上一个例子:
get.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	  	<form action="servlet/test" method="get">
  		<input type="text" name="getV">
  		<button type="submit">测试get请求</button>
  		</form>
</body>
</body>
</html>

post.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
  		<form action="servlet/test" method="post">
  		<input type="text" name="postV">
  		<button type="submit">测试post请求</button>
  		</form>
</body>
</html>

test.java

package testcharset;

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 test extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
			response.setHeader("Content-Type", "text/html;charset=UTF-8");//设置UTF-8的显示页面的类型和字符集
			PrintWriter out=response.getWriter();
			try {
				String username=request.getParameter("getV");
				username = new String(username.getBytes("ISO8859-1"),"utf-8");//根据你的tomcat里面的字符集进行对中文进行转换,将iso转换为UTF-8
				out.print("获取的get请求:");
				out.print(username);
			} catch (Exception e) {
				e.printStackTrace();
				// TODO: handle exception
			}finally{
				try {
					out.close();
				} catch (Exception e2) {
					e2.printStackTrace();
					// TODO: handle exception
				}
			}
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setHeader("Content-Type", "text/html;charset=UTF-8");//设置UTF-8的显示页面的类型和字符集
		request.setCharacterEncoding("utf-8"); //设置通过post方法进行传参的字符集
		PrintWriter out=response.getWriter();
		try {
			out.print("获取的Post请求:");
			out.print(request.getParameter("postV"));
		} catch (Exception e) {
			e.printStackTrace();
			// TODO: handle exception
		}finally{
			try {
				out.close();
			} catch (Exception e2) {
				e2.printStackTrace();
				// TODO: handle exception
			}
		}
	}

}

  

posted @ 2016-05-20 22:37  lonecloud  阅读(2496)  评论(0编辑  收藏  举报
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