蜗牛—JSP学习之JavaBean初识

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初识：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><jsp:useBean id="login" class="com.***.***.Login"></jsp:useBean>   <!-- 引用Java类 --><jsp:setProperty property="userName" name="login" value="10011"/><!-- 设置JavaBean的属性 --><jsp:setProperty property="password" name="login" value="123456789"/> <!-- 设置JavaBean的属性 --><hr/><hr/>用户名<jsp:getProperty property="userName" name="login"/>    <!-- 取得JavaBean的属性值 -->密码:<jsp:getProperty property="password" name="login"/><!--  --></body></html>

通过HTTP表单中的参数设置JavaBean的属性值

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><form action="" method="post">输入用户名:<input type="text" name="userName"><br/>输入密码:<input type="text" name="password"><input type="submit" value="确定"><input type="reset" value="清除"></form><jsp:useBean id="login" class="com.***.***.Login"></jsp:useBean>   <!-- 引用Java类 --><jsp:setProperty property="*" name="login" /><!-- 设置JavaBean的属性 --><hr/><hr/>用户名<jsp:getProperty property="userName" name="login"/>    <!-- 取得JavaBean的属性值 -->密码:<jsp:getProperty property="password" name="login"/><!--  --></body></html>

有可能在填入中文的时候输出会乱码

可以在.java文件中编写代码

public String getPassword() {try {byte b[] = password.getBytes("ISO-8859-1");password = new String(b, "UTF-8");return password;} catch (Exception e) {// TODO: handle exceptionreturn password;}}

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