`

使用DispatchAction分发

StrutsJSPSQLHTMLC++
阅读更多

应用中经常有增、删、改、查操作，如果象一前一样使用ListUserAction,AddUserAction等使action的数量增加，并且同一个模块分散开来不易维护。

使用DispatchAction处理。

要点：

自定义Action如UserAction继承自DispatchAction。

注意不要复写DispatchAction的excute方法，因为DispatchAction的excute方法里面的操作就是获得parameter参数值，并转向到该参数值对应的方法。

如下：

index.jsp

链接到user_list.jsp

<html:link action="user.do?method=list">User List</html:link>

 

user_list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@include file="/share/jsp_head_include.jspf" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript">
function addUser(){
	window.self.location = "user/user_input.jsp";
}

</script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form name="ListUserForm" action="">

<table border="1" >
	<tr>
		<td width="15">Id</td>
		<td width="10">Name</td>
		<td width="10">Age</td>
		<td width="10">Pwd</td>
	</tr>

<logic:present name="userList">
	<c:forEach items="${userList}" var="userModel">
	<tr>
		<td width="15">
			<INPUT type="checkbox" value="${userModel.userId}"/><c:out value="${userModel.userId}"></c:out>
		</td>
		<td width="10"><c:out value="${userModel.userName}"></c:out></td>
		<td width="10"><c:out value="${userModel.age}"></c:out></td>
		<td width="10"><c:out value="${userModel.pwd}"></c:out></td>
	</tr>
	</c:forEach>
</logic:present>
	<tr><td colspan="4">
	<html:button property="btn2" value="Add" onclick="addUser()"></html:button>

	</td></tr>
</table>

</form>
</body>
</html>

 

user_input.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@include file="/share/jsp_head_include.jspf" %>
<!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>

<html:form action="user.do" method="post">
<input type="hidden" name="method" value="add"/>
	id:<html:text property="userId"></html:text><br>
	name:<html:text property="userName"></html:text><br>
	age:<html:password property="pwd" redisplay="false"/><br>
	<html:submit>submit</html:submit>
	<html:reset/>
</html:form>
</body>
</html>

 

 

配置文件

	<action path="/user" type="com.lwf.struts.action.UserAction" name="userForm" parameter="method" >
			<forward name="success" path="/user/user_list.jsp"></forward>
			<forward name="addSuccess" path="/user.do?method=list"></forward>
		</action>

 

UserAction

 

package com.lwf.struts.action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

import com.lwf.struts.action.admin.UserForm;
import com.lwf.struts.action.entity.UserModel;
import com.lwf.struts.logic.admin.UserBean;

public class UserAction extends DispatchAction {

	public ActionForward list(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		try {
			List<UserModel> userList = UserBean.getUserList();
			request.setAttribute("userList", userList);
			System.out.println("list");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return mapping.findForward("success");
	}
	
	public ActionForward add(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
			UserForm userForm = (UserForm)form;
			int id = userForm.getUserId();
			String username = userForm.getUserName();
			String pwd = userForm.getPwd();
			UserBean.addUser(id,username,pwd);
			
		return mapping.findForward("addSuccess");
	}

}

 

package com.lwf.struts.logic.admin;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import com.lwf.struts.action.entity.UserModel;
import com.lwf.struts.util.DB;

public class UserBean {

	public static List<UserModel> getUserList() throws Exception{
		List<UserModel> list = new ArrayList<UserModel>();
		String sqlStr = "select * from \"user\"";
		Connection conn = DB.getConnection();
		Statement stmt = conn.createStatement();
		ResultSet rs = stmt.executeQuery(sqlStr);
		while(rs.next()){
			UserModel model = new UserModel();
			model.setUserId(rs.getInt("user_id"));
			model.setUserName(rs.getString("user_name"));
			model.setPwd(rs.getString("user_pwd"));
			model.setAge(rs.getInt("age"));
			list.add(model);
		}
		
		return list;
	}
	
	public static void addUser(int id, String username, String pwd) throws Exception{
		Connection conn = DB.getConnection();
		Statement stmt = conn.createStatement();
		String sqlStr = "insert into \"user\"(user_id,user_name,user_pwd) values(" 
			+ id
			+ ", '"
			+ username
			+ "',' "
			+ pwd
			+ "')";
		int n = stmt.executeUpdate(sqlStr);
		System.out.println(n);
		
		
	}
}

 

 

package com.lwf.struts.action.entity;

public class UserModel {

	private int userId;
	private String userName;
	private String pwd;
	private int age;
	
	public int getUserId() {
		return userId;
	}
	public void setUserId(int userId) {
		this.userId = userId;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPwd() {
		return pwd;
	}
	public void setPwd(String pwd) {
		this.pwd = pwd;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}

 

package com.lwf.struts.action.admin;

import org.apache.struts.action.ActionForm;

public class UserForm extends ActionForm {

	private int userId;
	private String userName;
	private String pwd;
	
	public int getUserId() {
		return userId;
	}
	public void setUserId(int userId) {
		this.userId = userId;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPwd() {
		return pwd;
	}
	public void setPwd(String pwd) {
		this.pwd = pwd;
	}
}

 

这里使用UserForm与UserModel实际上可以是一个。

package com.lwf.struts.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DB {
	
	public static Connection getConnection(){
		Connection conn = null;
		String url = "jdbc:postgresql://localhost/FOOD";
		String user = "foodadmin";
		String password = "admin";
		try {
			Class.forName("org.postgresql.Driver");
			
			conn = DriverManager.getConnection(url, user, password);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return conn;
	}
}

 

分享到：
| forward属性与ForwardAction类
评论
发表评论

您还没有登录,请您登录后再发表评论

相关推荐

Magicbox
Global site tag (gtag.js) - Google Analytics