Response对象响应的中文乱码的处理和Request对象接收中文的乱码处理

Response对象的响应的中文乱码的处理可以分为两个方面来处理:

其一是向页面输出字节流;

其二是向页面输出字符流;

下面用代码演示:

package response;

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

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//第一种方式:通过字节流向页面输出中文
		ServletOutputStream outputStream = response.getOutputStream();
		//设置浏览器输出中文的格式
		response.setHeader("Content-Type", "text/html;charset=UTF-8");
		//设置中文转成字节数组的编码格式
		outputStream.write("中文!".getBytes("UTF-8"));
		
		//第二种方式:通过字符流向页面输出中文
		//设置浏览器的的编码格式
		response.setHeader("Content-type", "text/html;charset=UTF-8");
		//设置字符流缓冲区的编码格式
		response.setCharacterEncoding("UTF-8");
		response.getWriter().write("特别的中文!");
		
		
		//字符流简化的格式
		response.setContentType("text/html;charset=UTF-8");
		response.getWriter().write("特别的中文!");
	}

	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

Request对象接收中文的乱码处理从两种方式来分析:

第一种:

提交方式为get方式时:

乱码原因:通过get方式获取到的参数在url后面,在地址栏已经进行了依次URL的编码了.

解决方案:先将存入到request缓冲区的值以ISO-8859-1的方式获取到,然后再以UTF-8的方式进行解码.

第二种:

提交方式为post方式时:

乱码原因:post方式提交的参数是在请求体中,request对象接收到参数后放在缓冲区中,缓冲区的编码格式是ISO-8859-1.

解决方案:接收参数之前就把编码格式换掉改成UTF-8.

代码如下:

package request;

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 RequestDemo1 extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		// 获取提交的参数
		String username = request.getParameter("username");
		// 控制台打印会是乱码
		System.out.println(username);
		// 先取后解码
		String name = new String(username.getBytes("ISO-8859-1"), "UTF-8");
		// 设置在页面显示的编码格式
		response.setContentType("text/html;charset=UTF-8");
		System.out.println(name);
		response.getWriter().write(name);
	}

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

		// 设置缓冲区的编码格式
		request.setCharacterEncoding("UTF-8");
		// 获取提交的参数
		String username = request.getParameter("username");

		System.out.println(username);

	}

}