struts2-11-OGNL实现书籍的增删改查
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一：集合模拟数据库 nuc.sw.db--->BookDB.java
1 package nuc.sw.db;
2
3 import java.util.ArrayList;
4 import java.util.List;
5
6 import nuc.sw.vo.Book;
7
8 public class BookDB {
9 //定义静态集合，类可以打点调用，并且类的多个对象也可以使用
10 public static List<Book> bookList=new ArrayList<Book>();
11 }
二：DAO层对集合做增删改查相应 的操作 nuc.sw.dao--->BookDAO.java
1 package nuc.sw.dao;
2
3 import java.util.List;
4 import nuc.sw.db.BookDB;
5 import nuc.sw.vo.Book;
6
7 public class BookDAO {
8
9
10 //通过模拟数据库获取集合
11 List<Book> list = BookDB.bookList;
12
13 //添加书籍方法 系统默认(add)
14 public void addBook(Book book){
15 list.add(book);
16 }
17
18 //获取书籍方法 若没有get方法，则返回空
19 public List<Book> getBook(){
20 return list;
21 }
22
23 //查找书籍信息
24 public Book findBook(Book book){
25 //泛化遍历集合 满足条件的直接定义
26 for(Book bookOne:list){
27 if(bookOne.getBookName().equals(book.getBookName()))
28 return bookOne;
29 }
30 return null;
31 }
32
33 //修改书籍信息
34 public void updateBook(Book book1,Book book2){
35 book1.setBookAuthor(book2.getBookAuthor());
36 book1.setBookPrice(book2.getBookPrice());
37 }
38
39 //删除书籍的方法 系统默认(remove)
40 public void deleteBook(Book book){
41 list.remove(book);
42 }
43 }
三：VO层对Book进行属性说明
1 package nuc.sw.vo;
2
3 public class Book {
4 private String bookName;
5 private String bookAuthor;
6 private float bookPrice;
7 public String getBookName() {
8 return bookName;
9 }
10 public void setBookName(String bookName) {
11 this.bookName = bookName;
12 }
13 public String getBookAuthor() {
14 return bookAuthor;
15 }
16 public void setBookAuthor(String bookAuthor) {
17 this.bookAuthor = bookAuthor;
18 }
19 public float getBookPrice() {
20 return bookPrice;
21 }
22 public void setBookPrice(float bookPrice) {
23 this.bookPrice = bookPrice;
24 }
25
26
27 }
四：在action中调用DAO层的增删改查方法进而转入struts.xml中 nuc.sw.action--->BookAction
1 package nuc.sw.action; 2 3 import java.util.List; 4 5 import com.opensymphony.xwork2.ActionContext; 6 import com.opensymphony.xwork2.ActionSupport; 7 import com.opensymphony.xwork2.ModelDriven; 8 import com.opensymphony.xwork2.util.ValueStack; 9 10 import nuc.sw.dao.BookDAO; 11 import nuc.sw.vo.Book; 12 13 public class BookAction extends ActionSupport implements ModelDriven<Book>{ 14 15 //模型驱动 16 private Book b=new Book(); 17 //创建BookDAO的对象来调用增删改查书的方法。 18 BookDAO bookDAO=new BookDAO(); 19 //将bList设置为全局变量 20 List<Book> bList = bookDAO.getBook(); 21 22 //值栈来存放； 23 ValueStack vs=ActionContext.getContext().getValueStack(); 24 //模型驱动 25 @Override 26 public Book getModel() { 27 return b; 28 } 29 30 //添加书籍方法 31 public String addBookMethod() throws Exception { 32 //通过BookDAO的对象来调用增书的方法 33 bookDAO.addBook(b); 34 return "addOK"; 35 } 36 37 //得到书的集合后存放到vs中 38 public String getBookMethod() throws Exception { 39 vs.set("books", bList); 40 return "getOK"; 41 } 42 43 //查找一本书籍的方法 44 public String findBookMethod() throws Exception { 45 Book findBook=bookDAO.findBook(b); 46 ActionContext.getContext().getSession().put("Book",findBook); 47 return "findOK"; 48 } 49 50 //修改书籍方法 51 public String updateBookMethod() throws Exception { 52 //先找到书 53 Book findBook=bookDAO.findBook(b); 54 //调用修改方法 55 bookDAO.updateBook(findBook,b); 56 //修改后仍显示集合的书籍而非修改过的一本书籍信息 57 ActionContext.getContext().getSession().put("Book",bList); 58 return "updateOK"; 59 } 60 61 //删除书籍方法 62 public String deleteBookMethod() throws Exception { 63 //找到书籍 64 Book findBook=bookDAO.findBook(b); 65 bookDAO.deleteBook(findBook); 66 //vs.set("Book","bList"); 这样操作会显示删除所有，但实际只删除了一个 67 ActionContext.getContext().getSession().put("Book", bList); 68 return "deleteOK"; 69 } 70 }
五：添加书籍的首页面--->addBook.jsp
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 7 <title>添加书籍信息</title> 8 </head> 9 <body> 10 <table align="left" border="1"> 11 <tr> 12 <td><a href="addBook.jsp">添加一本书籍信息</a></td> 13 </tr> 14 <tr> 15 <td><a href="${pageContext.request.contextPath}/findBook.jsp">查询某本书籍信息</a></td> 16 </tr> 17 </table> 18 <form action="${pageContext.request.contextPath}/addBookAction" method="post"> 19 <table align="center" border="1"> 20 <tr> 21 <td>书名:</td> 22 <td><input type="text" name="bookName"> </td> 23 <tr> 24 <tr> 25 <td>作者:</td> 26 <td><input type="text" name="bookAuthor"></td> 27 <tr> 28 <tr> 29 <td>价格:</td> 30 <td><input type="text" name="bookPrice"></td> 31 <tr> 32 <tr> 33 <td><input type="submit" value="添加"></td> 34 </tr> 35 </table> 36 </form> 37 </body> 38 </html>
六：配置struts.xml，去相应的Actio中寻找对应的action class method
因为本实验是针对书籍做操作，所以建立Book.xml--->复制struuts.xml,修改名字即可
struts.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 8 <include file="Book.xml" /> 9 10 </struts>
Book.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 8 <constant name="struts.enable.DynamicMethodInvocation" value="false" /> 9 <constant name="struts.devMode" value="true" /> 10 11 <package name="default" namespace="/" extends="struts-default"> 12 13 <action name="addBookAction" class="nuc.sw.action.BookAction" method="addBookMethod"> 14 <result name="addOK" type="chain">getBookAction</result> 15 </action> 16 <action name="getBookAction" class="nuc.sw.action.BookAction" method="getBookMethod"> 17 <result name="getOK">/showBookInfo.jsp</result> 18 </action> 19 <action name="findBookAction" class="nuc.sw.action.BookAction" method="findBookMethod"> 20 <result name="findOK">/showOneBook.jsp</result> 21 </action> 22 <action name="updateBookAction" class="nuc.sw.action.BookAction" method="updateBookMethod"> 23 <result name="updateOK">/showDeleteBookNewInfo.jsp</result> 24 </action> 25 <action name="deleteBookAction" class="nuc.sw.action.BookAction" method="deleteBookMethod"> 26 <result name="deleteOK">/showDeleteBookNewInfo.jsp</result> 27 </action> 28 </package> 29 30 31 </struts>
七：显示所有书籍信息--->showBookInfo.jsp
使用OGNL表达式获取信息，通过占位符进行修改删除操作。
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8" import="nuc.sw.vo.Book,java.util.*"%> 3 <%@ taglib prefix="s" uri="/struts-tags"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 8 <title>全部书籍信息</title> 9 </head> 10 <body> 11 <table align="left" border="1"> 12 <tr> 13 <td><a href="addBook.jsp">添加一本书籍信息</a></td> 14 </tr> 15 <tr> 16 <td><a href="${pageContext.request.contextPath}/findBook.jsp">查询某本书籍信息</a></td> 17 </tr> 18 </table> 19 <table align="center" border="1"> 20 <caption>全部书籍信息</caption> 21 <tr> 22 <td>书名:</td> 23 <td>作者:</td> 24 <td>定价:</td> 25 <td>操作1</td> 26 <td>操作2</td> 27 </tr> 28 <s:iterator value="books" var="b"> 29 <tr> 30 <td><s:property value="#b.bookName" /></td> 31 <td><s:property value="#b.bookAuthor" /></td> 32 <td><s:property value="#b.bookPrice" /></td> 33 <td><a href="${pageContext.request.contextPath}/updateBook.jsp? 34 bookName=<s:property value="#b.bookName" /> 35 &bookAuthor=<s:property value="#b.bookAuthor" /> 36 &bookPrice=<s:property value="#b.bookPrice" />">修改</a></td> 37 <td><a href="${pageContext.request.contextPath}/deleteBook.jsp?bookName=<s:property value="#b.bookName"/>">删除</a></td> 38 </tr> 39 </s:iterator> 40 </table> 41 <br> 42 43 <s:debug/> 44 </body> 45 </html>
八：查找书籍--->findBook.jsp
1 <%@ page language="java" contentType="text/html; charset=utf-8"
2 pageEncoding="utf-8"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
7 <title>Insert title here</title>
8 </head>
9 <body>
10 <form action="${pageContext.request.contextPath}/findBookAction" method="post">
11 <table align="center" border="1">
12 <caption>查找书籍信息</caption>
13 <tr>
14 <td>书名</td>
15 <td><input type="text" name="bookName"></td>
16 </tr>
17 <tr>
18 <td><input type="submit" value="查找"></td>
19 </tr>
20 </table>
21 </form>
22 </body>
23 </html>
九：显示一本书籍信息--->showOneBook.jsp
已结将Book存入session中，通过OGNL获取即可。
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8" import="nuc.sw.vo.Book,java.util.*"%> 3 <%@ taglib prefix="s" uri="/struts-tags"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 8 <title>结果书籍信息</title> 9 </head> 10 <body> 11 <table align="left" border="1"> 12 <tr> 13 <td><a href="addBook.jsp">添加一本书籍信息</a></td> 14 </tr> 15 <tr> 16 <td><a href="${pageContext.request.contextPath}/findBook.jsp">查询某本书籍信息</a></td> 17 </tr> 18 </table> 19 <table align="center" border="1"> 20 <caption>结果书籍信息</caption> 21 <tr> 22 <td>书名:</td> 23 <td>作者:</td> 24 <td>定价:</td> 25 </tr> 26 <tr> 27 <td><s:property value="#session.Book.bookName"/></td> 28 <td><s:property value="#session.Book.bookAuthor"/></td> 29 <td><s:property value="#session.Book.bookPrice"/></td> 30 </tr> 31 </table> 32 </body> 33 </html>
十：修改书籍信息--->updateBook.jsp
进行字符转换，否则会出现乱码
1 <%@ page language="java" contentType="text/html; charset=utf-8"
2 pageEncoding="utf-8" import="nuc.sw.vo.Book,java.util.*"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
7 <title>修改书籍信息</title>
8 </head>
9 <body>
10 <table align="left" border="1">
11 <tr>
12 <td><a href="addBook.jsp">添加一本书籍信息</a></td>
13 </tr>
14 <tr>
15 <td><a href="${pageContext.request.contextPath}/findBook.jsp">查询某本书籍信息</a></td>
16 </tr>
17 </table>
18 <%
19 String bookName=request.getParameter("bookName");
20 bookName=new String(bookName.getBytes("ISO-8859-1"),"utf-8");
21 String bookAuthor=request.getParameter("bookAuthor");
22 bookAuthor=new String(bookAuthor.getBytes("ISO-8859-1"),"utf-8");
23 String bookPrice=request.getParameter("bookPrice");
24 bookPrice=new String(bookPrice.getBytes("ISO-8859-1"),"utf-8");
25 %>
26 <form action="${pageContext.request.contextPath}/updateBookAction" method="post">
27 <table align="center" border="1">
28 <caption>修改书籍信息</caption>
29 <tr>
30 <td>书名:</td>
31 <td><input type="text" name="bookName" value="<%=bookName%>"> </td>
32 <tr>
33 <tr>
34 <td>作者:</td>
35 <td><input type="text" name="bookAuthor" value="<%=bookAuthor%>"></td>
36 <tr>
37 <tr>
38 <td>价格:</td>
39 <td><input type="text" name="bookPrice" value="<%=bookPrice%>"></td>
40 <tr>
41 <tr>
42 <td><input type="submit" value="修改书籍信息"></td>
43 </tr>
44
45 </table>
46 </form>
47 </body>
48 </html>
十一：修改成功后仍需显示所有书籍信息--->showDeleteBookNewInfo.jsp
OGNL获取集合中的数据
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@ taglib prefix="s" uri="/struts-tags"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>书籍信息</title> 9 </head> 10 <body> 11 <table align="left" border="1"> 12 <tr> 13 <td><a href="addBook.jsp">添加一本书籍信息</a></td> 14 </tr> 15 <tr> 16 <td><a href="${pageContext.request.contextPath}/findBook.jsp">查询某本书籍信息</a></td> 17 </tr> 18 </table> 19 <table align="center" border="1"> 20 <caption>书籍信息</caption> 21 <tr> 22 <td>书名:</td> 23 <td>作者:</td> 24 <td>定价:</td> 25 <td>操作1ModelForm(书籍的增删改)JAVA面向对象 要求做一个小型的图书管理系统 要有book Order OrderItem三个类 实现购买图书的增删改查