字符输出流：
package com.it.servlet; 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 ServletDemo1 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // doGet1(request, response); // doGet2(request, response); doGet3(request, response); } public void doGet1(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 服务器中默认的编码为ISO-8859-1（latin1也是MySQL的默认编码），它不支持中文，tomcat规定的 // 方法1 // 第一步，告诉服务器应用对响应内容使用UTF-8进行（字符编码）解析文本 response.setCharacterEncoding("UTF-8"); // 第二步，在响应消息头信息中，告诉客户端要使用什么字符集进行解码 response.setHeader("content-type", "text/html;charset=UTF-8"); // 该行相当于 // out.write("<html><head><title></title><meta charset=‘UTF-8‘></head><body>你好123！</body></html>"); PrintWriter out = response.getWriter();// 得到一个字符输出流 out.write("你好！doGet1");// 向客户端浏览器响应文本内容 } public void doGet2(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 服务器中默认的编码为ISO-8859-1（latin1也是MySQL的默认编码），它不支持中文，tomcat规定的 // 方法2 // 直接一句话，告诉服务器应用使用UTF-8解析文本，告诉客户端要使用什么编码 response.setContentType("text/html; charset=UTF-8"); PrintWriter out = response.getWriter();// 得到一个字符输出流 out.write("你好！doGet2");// 向客户端浏览器响应文本内容 } public void doGet3(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 服务器中默认的编码为ISO-8859-1（latin1也是MySQL的默认编码），它不支持中文，tomcat规定的 response.setCharacterEncoding("UTF-8");// 不能缺少该行，否则乱码 PrintWriter out = response.getWriter();// 得到一个字符输出流 // 方法3 out.write("<html><head><title></title><meta charset=‘UTF-8‘></head><body>你好！doGet3</body></html>");// 向客户端浏览器响应文本内容 // 查看源文件内容就是：<html><head><title></title><meta charset=‘UTF-8‘></head><body>你好123！</body></html> // out是作为局部变量不需要close } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }
字节输出流：
package com.it.servlet; import java.io.IOException; import java.io.PrintWriter; 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 ServletDemo2 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // doGet1(request, response);// gbk doGet2(request, response);// utf-8 } public void doGet1(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ServletOutputStream sos = response.getOutputStream();// 字节输出流 // void java.io.OutputStream.write(byte[] b) throws IOException sos.write("你好123doGet1".getBytes());// getBytes默认编码为本地平台编码（即：gbk） } public void doGet2(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 必须告知浏览器使用什么字符集进行的编码，才能解码输出的字节流内容 response.setContentType("text/html;charset=UTF-8"); ServletOutputStream sos = response.getOutputStream();// 字节输出流 // void java.io.OutputStream.write(byte[] b) throws IOException sos.write("你好123doGet2".getBytes("UTF-8"));// getBytes默认编码为本地平台编码（即：gbk） } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }
