第十二章 请求参数的接收
src/struts.xml配置：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false"/>
<constant name="struts.action.extension" value="do,action"/>
<package name="employee" namespace="/control/employee" extends="struts-default">
<action name="list_*" class="cn.itcast.action.HelloWorldAction" method="{1}"> //method="{1}"接收action通配符传来的值
<result name="success">/WEB-INF/page/message.jsp</result>
</action>
</package>
</struts>
输入id和name发送到action，通过反射技术调用与请求参数同名属性
的setter方法获取请求参数值
WebRoot/index.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<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">
</head>
<body>
<form action="<%=request.getContextPath()%>/control/employee/list_execute.action" method="post">
id:<input type="text" name="person.id"><br/>
name:<input type="text" name="person.name"><br/>
<input type="submit" value="发送"/>
</form>
</body>
</html>
action的处理HelloWorldAction.java：
package cn.itcast.action;
import cn.itcast.bean.Person;
public class HelloWorldAction {
private Integer id;
private String name;
private Person person;
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String addUI(){
return "success";
}
public String execute() throws Exception{
return "success";
}
}
action处理完后，跳转到 WEB-INF/page/message.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'message.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">
</head>
<body>
id=${person.id }<br/>
name=${person.name }
</body>
</html>