Response对象通过字节流输出中文内容

Posted 2022-06-21 工程哥

Response对象通过字节流输出中文内容：

第一种方法：

ResponseDemo1.java文件：

package com.neu;

import java.io.IOException;

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

public class ResponseDemo1 extends HttpServlet 

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException 
		test1(response);
	

	//解决方案一：更改浏览器的码表（不建议）
	//解决方案二(不建议)：向客户端输出一个<meta>标签,模拟了响应消息头：<meta http-equiv='Content-Type' content='text/html;charset=UTF-8'>
	//解决方案三（建议）:向客户端输出响应消息头：response.setHeader("Content-Type", "text/html;charset=UTF-8");
	//解决方案四（建议）：向客户端输出响应消息头response.setContentType("text/html;charset=UTF-8");
	//字节流输出数据查UTF-8
	private void test2(HttpServletResponse response) throws IOException
		String data = "不见了远处的青山";
		response.setContentType("text/html;charset=UTF-8");
		ServletOutputStream out = response.getOutputStream();
		out.write(data.getBytes("UTF-8"));//默认情况下：浏览器是乱码的（他默认查GBK）
	
	
	//字节流输出数据查本地码表
	private void test1(HttpServletResponse response) throws IOException 
		String data = "不见了远处的青山";
		ServletOutputStream out = response.getOutputStream();
		out.write(data.getBytes());//String:  getBytes()查本地默认的码表GBK getBytes(String charset)查指定码表
	

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

		doGet(request, response);
	

运行：http:localhost:8080/Response/servlet/ResponseDemo1

结果：不见了远处的青山

第二种方法：

ResponseDemo2.java文件：

运行：http:localhost:8080/Response/servlet/ResponseDemo1

package com.neu;

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;
/**
 * 字符流输出中文数据
 * @author wym
 *
 */
public class ResponseDemo2 extends HttpServlet 

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException 
		
		test1(response);
	

	private void test1(HttpServletResponse response) throws IOException 
		String data = "幸福是什么？";
		//改变字符流查的码表
		response.setCharacterEncoding("UTF-8");
		//告知客户端用UTF-8进行解码
		response.setContentType("text/html;charset=UTF-8");
		PrintWriter out = response.getWriter();//HttpServletResponse的实例由Tomcat服务器提供，Tomcat6.x默认查ISO-8859-1编码；Tomcat8.x默认编码为UTF-8
		out.write(data);
	

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

		doGet(request, response);
	

运行：http:localhost:8080/Response/servlet/ResponseDemo2

结果：幸福是什么？