struts-ch5.xml
<?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>
<package name="ch5" namespace="/ch5" extends="struts-default">
<interceptors>
<interceptor name="timer" class="com.ch5.interceptor.TimerInterceptor" />
<interceptor name="userDao" class="com.ch5.interceptor.UserDaoInterceptor" />
</interceptors>
<!-- timer 인터셉터 활용 -->
<action name="helloWorld" class="com.ch4.action.HelloWorld">
<interceptor-ref name="timer" />
<interceptor-ref name="logger" />
<result name="success">/ch4/hello.jsp</result>
</action>
<!-- UserDaoInterceptor 활용 -->
<action name="createUser3" class="com.ch5.action.CreateUser3">
<interceptor-ref name="prepare" />
<interceptor-ref name="modelDriven" />
<interceptor-ref name="params" />
<interceptor-ref name="userDao" />
<result name="success">createSuccess.jsp</result>
</action>
</package>
</struts>com.ch5.interceptor/UserDaoAware
package com.ch5.interceptor;
import com.ch4.dao.UserDao;
public interface UserDaoAware {
public void setUserDao(UserDao userDao);
}com.ch5.interceptor/UserDaoInterceptor
package com.ch5.interceptor;
import com.ch4.dao.UserDao;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class UserDaoInterceptor implements Interceptor{
UserDao userDao;
int cnt;
@Override
public void init() {
userDao = new UserDao();
System.out.println("cnt = "+(++cnt));
}
@Override
public String intercept(ActionInvocation invocation) throws Exception {
Object action = invocation.getAction();
if(action instanceof UserDaoAware){
UserDaoAware userDaoAware = (UserDaoAware) action;
userDaoAware.setUserDao(userDao);
}
return invocation.invoke();
}
@Override
public void destroy() {
userDao = null;
}
}com.ch5.action/CreateUser3
package com.ch5.action; import com.ch4.dao.UserDao; import com.ch4.domain.User; import com.ch5.interceptor.UserDaoAware; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ModelDriven; import com.opensymphony.xwork2.Preparable; public class CreateUser3 implements Action,Preparable,ModelDriven,UserDaoAware{ User user; UserDao userDao; @Override public String execute() throws Exception { userDao.createUser(user); return SUCCESS; } @Override public void setUserDao(UserDao userDao) { this.userDao = userDao ; } @Override public Object getModel() { return user; } @Override public void prepare() throws Exception { user = new User(); } }
ch5/createSuccess.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>도메인 오브젝트 테스트</title>
</head>
<body>
사용자를 추가했습니다.<br/>
${user}
</body>
</html>ch5/userForm3.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>도메인 오브젝트 테스트</title>
</head>
<body>
<form action="createUser3.action" method="post">
이름 : <input type="text" name="name"><br/>
나이 : <input type="text" name="age"><br/>
이메일 : <input type="text" name="email"><br/>
<input type="submit" value="전송">
</form>
</body>
</html>userDao -> init()메소드 동작이 되면서 intercept() 시작되면서 getAction을 받아오면서 CreateUser3.java를 불러온다
UserDaoAware로 if문으로 캐스팅 가능한지를 보고 불가능하면 빠져나간다
setUserDao가 있는게 확실하면 userDao를 셋팅
다 완료시 execute() 실행한뒤 return SUCCESS를 하여 result부분에 진입 한뒤 jsp 실행
실행시 콘솔창
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