012_HttpServletResponse响应乱码

最新推荐文章于 2023-11-27 20:33:16 发布

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最新推荐文章于 2023-11-27 20:33:16 发布 · 445 阅读

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本文介绍如何通过设置字符编码和内容类型来解决HTTPServletResponse响应中文乱码问题，包括使用meta标签、setCharacterEncoding、setHeader及setContentType等方法。

一. HttpServletResponse响应乱码处理

1. 新建一个ResponseLuanMa的Web工程

2. 使用meta设置网页编码为GB2312

2.1. 新建一个GWMetaGB2312.java类, 使用字符流响应客户端

2.2. 编写GWMetaGB2312.java

package com.lywgames.myservlet;

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 GWMetaGB2312 extends HttpServlet {
	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		StringBuilder sb = new StringBuilder();
		sb.append("<!DOCTYPE html>").append("\r\n");
		sb.append("<html>").append("\r\n");
		sb.append("<head>").append("\r\n");
		// 设置网页编码为GB2312
		sb.append("<meta charset='GB2312' />").append("\r\n");
		sb.append("<title>HttpServletResponse 字符流相应中文乱码</title>").append("\r\n");
		sb.append("</head>").append("\r\n");
		sb.append("<body>").append("\r\n");
		sb.append("<h1>HttpServletResponse 字符流相应中文乱码</h1>").append("\r\n");
		sb.append("</body>").append("\r\n");
		sb.append("</html>");

// 字符流响应客户端
		resp.getWriter().println(sb.toString());
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doGet(req, resp);
	}
}

2.3. 编写web.xml

2.4. 部署运行, 网页的中文显示乱码

2.5. 查看网页编码是GB2312, 就是我们在meta中设置的编码

3. 使用meta设置网页编码为UTF-8

3.1. 新建一个GWMetaUTF8.java类, 使用字符流响应客户端

3.2. 编写GWMetaUTF8.java类

package com.lywgames.myservlet;

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 GWMetaUTF8 extends HttpServlet {
	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		StringBuilder sb = new StringBuilder();
		sb.append("<!DOCTYPE html>").append("\r\n");
		sb.append("<html>").append("\r\n");
		sb.append("<head>").append("\r\n");
		// 设置网页编码为UTF-8
		sb.append("<meta charset='UTF-8' />").append("\r\n");
		sb.append("<title>HttpServletResponse 字符流相应中文乱码</title>").append("\r\n");
		sb.append("</head>").append("\r\n");
		sb.append("<body>").append("\r\n");
		sb.append("<h1>HttpServletResponse 字符流相应中文乱码</h1>").append("\r\n");
		sb.append("</body>").append("\r\n");
		sb.append("</html>");

// 字符流响应客户端
		resp.getWriter().println(sb.toString());
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doGet(req, resp);
	}
}

3.3. 编写web

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