问题代码:
jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8" ???pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset="UTF-8"> <title>Insert title here</title> </head><body> ???<!-- 提交的时候必须是name=value键值对 --> ???????<!-- 应用名+请求路径 --> ???<form action="/gp_web_day17/RequestDemo5" method="post"> ???????用户名:<input type="text" name="username"><br/> ???????密 ???码:<input type="password" name="pwd"><br/> ???????性 ???别:<input type="radio" name="sex" value="男" />男 ??????????????<input type="radio" name="sex" value="女" />女<br /> ??????????????????????爱 ???好:<input type="checkbox" name="hobby" value="睡觉">睡觉 ?????????????????????????<input type="checkbox" name="hobby" value="游戏">游戏 ??????????????????<input type="checkbox" name="hobby" value="旅游">旅游<br /> ???????????????所在国家:<select name="sel"> ???????????????????<option>-----请选择-----</option> ???????????????????<option value="cn">中国</option> ???????????????????<option value="fa">法国</option> ???????????????????<option value="en">英国</option> ???????????????</select> ???????????????????????<input type="submit" value="注册"> ???</form></body></html>
Servlet:
@WebServlet("/RequestDemo5")public class RequestDemo5 extends HttpServlet { ???private static final long serialVersionUID = 1L; ??????????public RequestDemo5() { ???????super(); ???????????} ???//处理get方式的乱码问题: ???// ????get方式传递的参数内容默认编码方式问ISO-8859-1 ???????// ???1 自己用再编码再解码处理 ???// ???2在tomcat的配置文件中加入URIEncoding="UTF-8" ???public String dispose(String str){ ???????????????try { ???????????
//编码 ???????????byte[] arr = str.getBytes("ISO-8859-1"); ??????? //解码 ???????????String ssString = new String(arr, "UTF-8"); ???????????????????????return ssString; ???????????????????} catch (UnsupportedEncodingException e) { ???????????????????????e.printStackTrace(); ???????} ???????????????return null; ???} ???????protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ???????????????System.out.println("解码前:"+request.getParameter("username")+" ???"+request.getParameter("sex")); ???????????????String name = dispose(request.getParameter("username")); ???????String sex = dispose(request.getParameter("sex")); ???????????????System.out.println("解码后:"+name+" ???sex:"+sex); ???} ???protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ???????????????doGet(request, response); ???}
运行结果:
问题分析:
问题解决:
//告诉浏览器使用ISO-8859-1编码方式,就可以检测get方法再编码再解码方式是否可以解决乱码问题
<meta http-equiv="Content-Type" content="text/html; charset="ISO-8859-1">
问题总结:
<!-- contentType="text/html; charset=UTF-8: ?????????jsp在编辑器中保存文件,使用的是UTF-8编码格式 ???????问题:通过浏览器调用servlet文件,出现中文乱码--><!-- pageEncoding="UTF-8: ?????????jsp在编辑器中保存文件,使用的是UTF-8编码格式 ????????问题:通过浏览器调用jsp,jsp出现中文乱码--><%@ page language="java" contentType="text/html; charset=UTF-8" ???pageEncoding="UTF-8"%>
<!-- ?通过<meta>标签模拟response头,控制浏览器用ISO-8859-1的编码解析 --><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
//处理get方式的乱码问题:
??? // get方式传递的参数内容默认编码方式ISO-8859-1
??? //1 自己用再编码再解码处理
//2在tomcat的配置文件中加入URIEncoding="UTF-8"
//处理post方法解决乱码问题:
//将response对象中的数据以UTF-8解码后的字节发送给浏览器
//request.setCharacterEncoding("utf-8");
UTF-8国际编码 GBK中文编码(包含GB2312,即通过GB2312编码后可以通过GBK解码,反之不成立)
tomcat默认编码是ISO-8859-1
getBytes()通过平台默认字符集进行编码
get方式传递的参数内容默认编码方式ISO-8859-1
?? 表示没有编码
参考博客:http://www.cnblogs.com/oldinaction/p/5167481.html
Web 项目遇到的乱码问题
原文地址:http://www.cnblogs.com/roxy/p/7460685.html