【Servlet】Response的OutputStream与Writer输出数据乱码的问题

 

 

OutputStream输出中文数据乱码问题解决方式：

 

package cn.lsh.servlet;
 
import java.io.IOException;
import java.io.OutputStream;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
//Response的OutputStream输出中文数据问题
public class Response extends HttpServlet {
 
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //指定以UTF-8编码，那么就要指定浏览器以UTF-8解码，总之，编码与解码要相同，否者就会出现乱码。
        //注意：第二个参数中间不要写成“，”否则当访问Servlet时会出现提示下载的情况。
        response.setHeader("content-type", "text/html;charset=utf-8");
        String str = "中国，我爱你";
        OutputStream out = response.getOutputStream();
        out.write(str.getBytes("utf-8"));//指定以UTF-8编码。
    }
 
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }
 
}

 

 

 

Writer输出数据乱码的问题解决方法：

 

以下是没有指定浏览以UTF-8码表打开所以导致浏览器输出乱码：

package cn.lsh.servlet;
 
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
//Response的OutputStream输出中文数据问题
public class Response extends HttpServlet {
 
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //指定以UTF-8编码，那么就要指定浏览器以UTF-8解码，总之，编码与解码要相同，否者就会出现乱码。
        //注意：第二个参数中间不要写成“，”否则当访问Servlet时会出现提示下载的情况。
        
        //设置response使用utf-8码表，以控制response以什么码表向浏览器写出数据
        response.setCharacterEncoding("UTF-8");
        /*
        //指定浏览器以什么码表打开服务器发送的数据
        response.setContentType("text/html;charset=utf-8");
        */
        String str = "中国，我爱你";
        PrintWriter pw = response.getWriter();
        pw.write(str);
        
    }
 
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }
 
}

 

浏览器输出结果为：

 

 

以下指定浏览以UTF-8码表打开所以浏览器输出中文数据正常：

 

package cn.lsh.servlet;
 
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
//Response的OutputStream输出中文数据问题
public class Response extends HttpServlet {
 
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //指定以UTF-8编码，那么就要指定浏览器以UTF-8解码，总之，编码与解码要相同，否者就会出现乱码。
        //注意：第二个参数中间不要写成“，”否则当访问Servlet时会出现提示下载的情况。
        
        //设置response使用utf-8码表，以控制response以什么码表向浏览器写出数据
        response.setCharacterEncoding("UTF-8");
        
        //指定浏览器以什么码表打开服务器发送的数据
        response.setContentType("text/html;charset=utf-8");
        
        String str = "中国，我爱你";
        PrintWriter pw = response.getWriter();
        pw.write(str);
        
    }
 
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }
 
}