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在添加参数的界面添加<%request.setCharacterEncoding("UTF-8");%>
实例代码：
login_confirm.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <!-- 解决jsp:param传参乱码问题 --> <%request.setCharacterEncoding("UTF-8");%> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>登录验证界面</title> </head> <body> <c:if test="${param.username==\"123\" && param.userpass==\"123456\"}"> <!-- 把用户信息添加到session--> <c:set var="username" value="${param.username}" scope="session"/> <jsp:forward page="login_success.jsp"/> </c:if> <c:if test="${param.username !=\"123\"}"> <jsp:forward page="login_failure.jsp"> <jsp:param name="info" value="用户名不正确"/> </jsp:forward> </c:if> <c:if test="${param.userpass!=\"123456\"}"> <jsp:forward page="login_failure.jsp"> <jsp:param name="info" value="用户口令不正确"/> </jsp:forward> </c:if> </body> </html>
login_failure.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>登录成功界面</title> </head> <body> 登录失败，错误信息如下：${param.info} <div align="center"> <a href="index.jsp">重新登录</a> </div> </body> </html>
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原文地址：http://www.cnblogs.com/anan1688/p/4487100.html
