Servlet学习笔记---重写URl地址（编码问题）

最新推荐文章于 2025-06-09 16:53:52 发布

原创最新推荐文章于 2025-06-09 16:53:52 发布 · 2.7k 阅读

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#编码问题 #servlet学习笔记 #重写URL

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这篇Servlet学习笔记探讨了URL重写时遇到的编码问题。文章指出，当使用UTF-8设置响应和请求编码时，仍可能出现张三名称显示为乱码的情况。原因在于浏览器默认使用ISO-8859-1读取URL信息。为解决这个问题，可以通过将ISO-8859-1编码的参数转换为UTF-8进行解码，即`new String(request.getParameter("name").getBytes("ISO-8859-1"), "UTF-8")`。" 129015679,11782574,寻找数组中和为0的三元组组合,"['python', '算法', 'leetcode']

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URLReWrite2.java

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 URLReWrite2 extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		  response.setContentType("text/html;charset=UTF-8");
		  request.setCharacterEncoding("UTF-8");
		  
		PrintWriter pw=response.getWriter();
		pw.write(new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8"));
		pw.write(request.getParameter("age"));	
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

URLWrite.java

package com.wanhao;

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 URLwrite extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		  response.setContentType("text/html;charset=UTF-8");
		  request.setCharacterEncoding("UTF-8");
          String path=response.encodeURL("/Javaee/servlet/URLReWrite2?name=张三&age=16");
          PrintWriter out=response.getWriter();
		 out.write("<html>");
         out.write("<a href="+path+">here</a>");
         
		 out.write("</html>");
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

说说实现中遇到的编码问题：

在两个Servlet中同时写：

response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");

然后张三一直是乱码，因为默认把浏览器URL信息的读取是采用 iso-8859-1 格式的，因此必须要编码转换，

new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8")；便可