Response-输出字符数据
服务器输出字符数据到浏览器
步骤:
1. 获取字符输出流
2. 输出数据
注意:
乱码问题
1. PrintWriter pw = response.getWriter();获取的流的默认编码是ISO-8859-1
2. 设置该流的默认编码
3. 告诉浏览器响应体使用的编码
简单的形式,设置编码,是在获取流之前设置
response.setContentType("text/html;charset=utf-8");
package com.example.day_14_response; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; @WebServlet("/responseDemo4") public class ResponseDemo4 extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取流对象之前,设置流的默认编码:ISO-8859-1 设置为:GBK // response.setCharacterEncoding("utf-8"); //告诉浏览器,服务器发送的消息体数据的编码。建议浏览器使用该编码解码 //response.setHeader("content-type","text/html;charset=utf-8"); //简单的形式,设置编码 response.setContentType("text/html;charset=utf-8"); //1.获取字符输出流 PrintWriter pw = response.getWriter(); //2.输出数据 //pw.write("<h1>hello response</h1>"); pw.write("你好啊啊啊 response"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request,response); } }
Response-输出字节数据
服务器输出字节数据到浏览器
步骤:
1. 获取字节输出流
2. 输出数据
package com.example.day_14_response; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet("/responseDemo5") public class ResponseDemo5 extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); //1.获取字节输出流 ServletOutputStream sos = response.getOutputStream(); //2.输出数据 sos.write("你好".getBytes("utf-8")); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request,response); } }
标签:输出,Response,HttpServletResponse,javax,import,servlet,response,字节 From: https://www.cnblogs.com/yuzong/p/16936655.html