Struts2框架图书管理系统

Struts2框架图书管理系统

1.首先需要在原有的Struts2框架为基础。
要在src下创建各个分层

这分别需要在按层级建包。首先创建com包再在com包下建hnpi包再在com.hnpi包下建action,been,dao,interceptor,service,util包&＃xff0c;还要在com.hnpi.service&＃xff0c;com.hnpi.dao下建impl包&＃xff0c;如上图所示。
2.下面创建视图层&＃xff0c;注意还是需要按层级&＃xff0c;不同的视图需要放在创建不同的文件下&＃xff1a;如图&＃xff1b;

在这里&＃xff0c;我们创建了book和user两个文件夹&＃xff0c;用来区分不同的视图&＃xff0c;两个文件夹下有booklist.jsp和login.jsp.其中的代码段如下&＃xff1a;
login.jsp&＃xff1a;

<%&＃64; page language&＃61;"java" import&＃61;"java.util.*" pageEncoding&＃61;"utf-8"%>
<%
String path &＃61; request.getContextPath();
String basePath &＃61; request.getScheme()&＃43;"://"&＃43;request.getServerName()&＃43;":"&＃43;request.getServerPort()&＃43;path&＃43;"/";
%>
">用户名&＃xff1a;
密码&＃xff1a;



booklist.jsp&＃xff1a;

<%&＃64; page language&＃61;"java" import&＃61;"java.util.*" pageEncoding&＃61;"UTF-8"%>
<%&＃64; taglib prefix&＃61;"s" uri&＃61;"/struts-tags" %>
<%
String path &＃61; request.getContextPath();
String basePath &＃61; request.getScheme()&＃43;"://"&＃43;request.getServerName()&＃43;":"&＃43;request.getServerPort()&＃43;path&＃43;"/";
%>

book/toAddBook&＃39;>新增图书

下面要编写各包下action的代码了
首先action层下的代码如下&＃xff1a;
BookAction.java:

package com.hnpi.action;import java.util.ArrayList;
import java.util.List;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;import com.hnpi.bean.Book;
import com.hnpi.service.BookService;
import com.hnpi.service.impl.BookServiceImpl;
import com.opensymphony.xwork2.ActionSupport;public class BookAction extends ActionSupport {private Book book;public Book getBook() {return book;}public void setBook(Book book) {this.book &＃61; book;}/*** 图书列表* &＃64;return*/public String bookList() {BookService bookService &＃61; new BookServiceImpl();List books &＃61; new ArrayList();books &＃61; bookService.selectBooks();//问题1:如果不通过request 设置属性的方式传值 可不可以通过传递 字符串(json字符串)的方式放在页面进行显示//问题2:action 传递给页面的json字符串 页面怎么处理?HttpServletRequest request &＃61; ServletActionContext.getRequest();request.setAttribute("books", books);return "success";}}


LoginAction.java:

package com.hnpi.action;import java.util.Map;import javax.servlet.http.HttpSession;import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport {private String name;private String pwd;public String getName() {return name;}public void setName(String name) {this.name &＃61; name;}public String getPwd() {return pwd;}public void setPwd(String pwd) {this.pwd &＃61; pwd;}public String login(){System.out.println(name&＃43;":"&＃43;pwd);if(name !&＃61;null &&!"".equals(name) && pwd !&＃61;null &&!"".equals(pwd)){//判断if(name.equals("fuxian")&&pwd.equals("123")){Map session &＃61; ActionContext.getContext().getSession();session.put("user", name);return "success";}else{return "error";}}else{return "error";}}}


been层的代码如下&＃xff1a;
Been.java:

package com.hnpi.bean;public class Book {private int id;private String bookName;private String bookAuthor;private String bookIsbn;private String bookPublish;public int getId() {return id;}public void setId(int id) {this.id &＃61; id;}public String getBookName() {return bookName;}public void setBookName(String bookName) {this.bookName &＃61; bookName;}public String getBookAuthor() {return bookAuthor;}public void setBookAuthor(String bookAuthor) {this.bookAuthor &＃61; bookAuthor;}public String getBookIsbn() {return bookIsbn;}public void setBookIsbn(String bookIsbn) {this.bookIsbn &＃61; bookIsbn;}public String getBookPublish() {return bookPublish;}public void setBookPublish(String bookPublish) {this.bookPublish &＃61; bookPublish;}public Book() {super();}public Book(int id, String bookName, String bookAuthor, String bookIsbn,String bookPublish) {super();this.id &＃61; id;this.bookName &＃61; bookName;this.bookAuthor &＃61; bookAuthor;this.bookIsbn &＃61; bookIsbn;this.bookPublish &＃61; bookPublish;}public String toString() {return "Book [bookAuthor&＃61;" &＃43; bookAuthor &＃43; ", bookIsbn&＃61;" &＃43; bookIsbn&＃43; ", bookName&＃61;" &＃43; bookName &＃43; ", bookPublish&＃61;" &＃43; bookPublish&＃43; ", id&＃61;" &＃43; id &＃43; "]";}}

dao层的代码如下&＃xff1a;
BookDao.java:

package com.hnpi.dao;import java.util.List;import com.hnpi.bean.Book;public interface BookDao {public List selectBooks();}

dao下的impl层代码如下&＃xff1a;
BookDaoFileImpl.java

package com.hnpi.dao.impl;import java.util.List;import com.hnpi.bean.Book;
import com.hnpi.dao.BookDao;public class BookDaoFileImpl implements BookDao{public List selectBooks() {// TODO 读取文件的代码return null;}}

BookDaoImpl.java&＃xff1a;

package com.hnpi.dao.impl;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;import com.hnpi.bean.Book;
import com.hnpi.dao.BookDao;
import com.hnpi.util.DBUtil;public class BookDaoImpl implements BookDao {public List selectBooks() {Connection conn &＃61; DBUtil.getConn();String sql &＃61; "select * from book";PreparedStatement ps &＃61; null;ResultSet rs &＃61; null;List books &＃61; new ArrayList();try {ps &＃61; conn.prepareStatement(sql);rs &＃61; ps.executeQuery();while(rs.next()){Book book &＃61; new Book();book.setId(rs.getInt(1));book.setBookName(rs.getString(2));book.setBookAuthor(rs.getString(3));book.setBookIsbn(rs.getString(4));book.setBookPublish(rs.getString(5));books.add(book);}} catch (Exception e) {e.printStackTrace();} finally {DBUtil.closeConn(conn, ps, null);}return books;}}


BookDaoRedisImpl.java

package com.hnpi.dao.impl;import java.util.List;import com.hnpi.bean.Book;
import com.hnpi.dao.BookDao;public class BookDaoRedisImpl implements BookDao{public List selectBooks() {// TODO 访问缓存的代码return null;}}

interceptor层下的代码&＃xff1a;
UserInterceptor.java&＃xff1a;

package com.hnpi.interceptor;import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;public class UserInterceptor extends AbstractInterceptor{&＃64;Overridepublic String intercept(ActionInvocation invocation) throws Exception {String user&＃61;(String) ActionContext.getContext().getSession().get("user");if (user&＃61;&＃61;null||"".equals(user)) {return "fail";}return invocation.invoke();}}

service层下的代码&＃xff1a;
BookService.java&＃xff1a;

package com.hnpi.service;import java.util.List;import com.hnpi.bean.Book;public interface BookService {/*** 查询所有图书* &＃64;return*/public List selectBooks();}

service层下impl的代码&＃xff1a;
BookServiceImpl.java

package com.hnpi.service.impl;import java.util.List;import com.hnpi.bean.Book;
import com.hnpi.dao.BookDao;
import com.hnpi.dao.impl.BookDaoFileImpl;
import com.hnpi.dao.impl.BookDaoImpl;
import com.hnpi.service.BookService;public class BookServiceImpl implements BookService {public List selectBooks() {BookDao bookDao &＃61; new BookDaoImpl();
// BookDao bookDao &＃61; new BookDaoRedisImpl();
// BookDao bookDao &＃61; new BookDaoFileImpl();return bookDao.selectBooks();}}


util层下代码&＃xff1a;
DBUtil.java&＃xff1a;
package com.hnpi.util;

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

public class DBUtil {

public static Connection getConn() {String url &＃61; "jdbc:sqlserver://localhost:1433;databaseName&＃61;MyDB";String user &＃61; "sa";String pwd &＃61; "1";Connection conn &＃61; null;try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");conn &＃61; DriverManager.getConnection(url, user, pwd);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}return conn;
}public static void closeConn(Connection conn, PreparedStatement ps,ResultSet rs) {try {if (conn !&＃61; null) {conn.close();}} catch (SQLException e) {e.printStackTrace();}try {if (ps !&＃61; null) {ps.close();}} catch (SQLException e) {e.printStackTrace();}try {if (rs !&＃61; null) {rs.close();}} catch (SQLException e) {e.printStackTrace();}}


}
最后需要配置struts.xml


/bookbookListbookList/user/login.jsp/user/login.jsp/book/bookList.jsp


以上就是Struts2框架下的图书管理系统方法和代码&＃xff0c;希望可以对学者有所帮助。