一、配置步骤

将框架打成jar包，然后导入新工程，并且把框架的依赖jar包导入进去
将分页标签相关文件、及相关助手类导入
框架的配置文件添加、以及web.xml的配置-以后开源框架的使用从这一步开始
完成Book实体类及bookDao的编写
完成通用的增删改方法
完成BookAction
完成mvc.xml的配置
完成前台代码的编写

二、配置框架前三步

导入相应的jar

编辑

导入之后我们选中所有的jar包===》右键===》Build Path===》Add to Build Path

编辑

导入相应的Class

编辑

导入xml文件

<?xml version="1.0" encoding="UTF-8"?>
<config>
  <action path="/book" type="com.tgq.web.BookAction">
    <forward name="list" path="/bookList.jsp" redirect="false" />
    <forward name="toList" path="/book.action?methodName=list"
      redirect="true" />
    <forward name="toEdit" path="/bookEdit.jsp" redirect="false" />
  </action>
</config>

测试我们的数据库能否连接

编辑

三、优化基本操作（增删改）

1、基础优化

编写实体类

package com.tgq.entity;
/**
 * 实体类
 * 
 * @author tgq
 *
 */
public class Book {
  private int bid;
  private String bname;
  private float price;
  public int getBid() {
    return bid;
  }
  public void setBid(int bid) {
    this.bid = bid;
  }
  public String getBname() {
    return bname;
  }
  public void setBname(String bname) {
    this.bname = bname;
  }
  public float getPrice() {
    return price;
  }
  public void setPrice(float price) {
    this.price = price;
  }
  @Override
  public String toString() {
    return "Book [bid=" + bid + ", bname=" + bname + ", price=" + price + "]";
  }
  public Book(int bid, String bname, float price) {
    super();
    this.bid = bid;
    this.bname = bname;
    this.price = price;
  }
  public Book() {
    // TODO Auto-generated constructor stub
  }
}

编写BookDao类

编写增删改查的方法

package com.tgq.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.List;
import com.tgq.entity.Book;
import com.tgq.util.BaseDao;
import com.tgq.util.DBAccess;
import com.tgq.util.PageBean;
import com.tgq.util.StringUtils;
public class BookDao extends BaseDao<Book> {
  public List<Book> list(Book book, PageBean pageBean) throws Exception {
    String sql = "select * from t_mvc_book where 1=1 ";
    String bname = book.getBname();
    int bid = book.getBid();
    // 判断是否为空
    if (StringUtils.isNotBlank(bname)) {
      sql += " and bname like '%" + bname + "%'";
    }
    // 判断前台是否传bid
    if (bid != 0) {
      sql += " and bid=" + bid;
    }
    return super.executeQuery(sql, Book.class, pageBean);
  }
  /**
   * 增加Book的方法
   * 
   * @param book
   *            实体类
   * @return
   * @throws Exception
   *             万能异常
   */
  public int addBook(Book book) throws Exception {
    String sql = "insert into t_mvc_book values(?,?,?)";
    Connection conn = DBAccess.getConnection();
    PreparedStatement ps = conn.prepareStatement(sql);
    ps.setObject(1, book.getBid());
    ps.setObject(2, book.getBname());
    ps.setObject(3, book.getPrice());
    return ps.executeUpdate();
  }
  /**
   * 删除Book的方法 ，根据id删除
   * 
   * @param book
   *            实体类
   * @return
   * @throws Exception
   *             万能异常
   */
  public int delBook(Book book) throws Exception {
    String sql = "delete from t_mvc_book where bid=?";
    Connection conn = DBAccess.getConnection();
    PreparedStatement ps = conn.prepareStatement(sql);
    ps.setObject(1, book.getBid());
    return ps.executeUpdate();
  }
  /**
   * 修改Book的方法
   * 
   * @param book
   *            实体类
   * @return
   * @throws Exception
   *             万能异常
   */
  public int updateBook(Book book) throws Exception {
    String sql = "update t_mvc_book set bname=?,price=? where bid=?";
    Connection conn = DBAccess.getConnection();
    PreparedStatement ps = conn.prepareStatement(sql);
    ps.setObject(1, book.getBname());
    ps.setObject(2, book.getPrice());
    ps.setObject(3, book.getBid());
    return ps.executeUpdate();
  }
}

1、在增删改的方法里面我们这两行代码是一样的、重复的

Connection conn = DBAccess.getConnection();
    PreparedStatement ps = conn.prepareStatement(sql);

2、代码逻辑是重复的===》sql占位符赋值

ps.setObject(1, book.getBid());
    ps.setObject(2, book.getBname());
    ps.setObject(3, book.getPrice());

怎么解决？BaseDao

进行一个通用的增删改的方法

/**
   * 通用的增删改方法
   * 
   * @param sql
   *            数据库sql语句
   * @param t
   *            对应表的实体类
   * @param attrs
   *            要修改的属性值
   * @return
   * @throws Exception
   *             万能异常
   */
  public int executeUpdate(String sql, T t, String[] attrs) throws Exception {
    Connection conn = DBAccess.getConnection();
    PreparedStatement ps = conn.prepareStatement(sql);
    //利用fori 下标来进行？的赋值
    for (int i = 0; i < attrs.length; i++) {
      Field field = t.getClass().getDeclaredField(attrs[i]);
      // 打开权限
      field.setAccessible(true);
      ps.setObject(i + 1, field.get(t));
    }
    return ps.executeUpdate();
  }

优化BookDao

我们在BaseDao类里面增加了一个通用的增删改的方法，我们在BookDao里面利用起来

/**
   * 增加Book的方法
   * 
   * @param book
   *            实体类
   * @return
   * @throws Exception
   *             万能异常
   */
  public int addBook(Book book) throws Exception {
    String sql = "insert into t_mvc_book values(?,?,?)";
    return super.executeUpdate(sql, book, new String[] { "bid", "bname", "price" });
  }
  /**
   * 删除Book的方法 ，根据id删除
   * 
   * @param book
   *            实体类
   * @return
   * @throws Exception
   *             万能异常
   */
  public int delBook(Book book) throws Exception {
    String sql = "delete from t_mvc_book where bid=?";
    return super.executeUpdate(sql, book, new String[] { "bid" });
  }
  /**
   * 修改Book的方法
   * 
   * @param book
   *            实体类
   * @return
   * @throws Exception
   *             万能异常
   */
  public int updateBook(Book book) throws Exception {
    String sql = "update t_mvc_book set bname=?,price=? where bid=?";
    return super.executeUpdate(sql, book, new String[] { "bname", "price", "bid" });
  }

JUnit测试

选中我们的类名===》ctrl+N===》JUnit Test Case===》选中顶部的New JUnit 4 test===》Next

编辑

勾选BookDao===》Finish

编辑

BookDaoTest测试

package com.tgq.dao;
import static org.junit.Assert.*;
import java.util.List;
import org.junit.Test;
import com.tgq.entity.Book;
import com.tgq.util.PageBean;
public class BookDaoTest {
  private BookDao bookDao = new BookDao();
  @Test
  public void testList() throws Exception {
    Book book = new Book();
    book.setBname("52");
    PageBean pageBean = new PageBean();
    // pageBean.setPage(2);
    List<Book> list = bookDao.list(book, pageBean);
    for (Book b : list) {
      System.out.println(b);
    }
  }
  @Test
  public void testAddBook() throws Exception {
    Book book = new Book();
    book.setBid(52);
    book.setBname("5252");
    book.setPrice(12f);
    bookDao.addBook(book);
  }
  @Test
  public void testDelBook() throws Exception {
    Book book = new Book();
    book.setBid(52);
    bookDao.delBook(book);
  }
  @Test
  public void testUpdateBook() throws Exception {
    Book book = new Book();
    book.setBid(52);
    book.setBname("5252");
    book.setPrice(19f);
    bookDao.updateBook(book);
  }
}

测试结果：

编辑

2、后台优化

我们新建一个web包，在里面新建一个BookAction类（class），继承ActionSupport，实现

ModelDriver接口，编写

编辑

package com.tgq.web;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.tgq.dao.BookDao;
import com.tgq.entity.Book;
import com.tgq.util.PageBean;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
public class BookAction extends ActionSupport implements ModelDriver<Book> {
  private Book book = new Book();
  private BookDao bookDao = new BookDao();
  // 查询 bookList.jsp
  public String list(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    PageBean pageBean = new PageBean();
    pageBean.setRequest(req);
    List<Book> list = bookDao.list(book, pageBean);
    req.setAttribute("list", list);
    req.setAttribute("pageBean", pageBean);
    return "list";
  }
  // 编辑界面跳转 bookEdit.jsp
  public String toEdit(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    // 前提
    if (book.getBid() != 0) {
      List<Book> list = bookDao.list(book, null);// 不需要分页
      req.setAttribute("b", list.get(0));
    }
    return "toEdit";
  }
  // 增加 重定向到book.action?methodName=list
  public String add(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    bookDao.addBook(book);
    return "toEdit";
  }
  // 删除
  public String del(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    bookDao.delBook(book);
    return "toEdit";
  }
  // 修改
  public String update(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    bookDao.updateBook(book);
    return "toEdit";
  }
  @Override
  public Book getModel() {
    return book;
  }
}

我们编写jsp界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!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">
<link
  href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
  rel="stylesheet">
<script
  src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>书籍列表</title>
<style type="text/css">
.page-item input {
  padding: 0;
  width: 40px;
  height: 100%;
  text-align: center;
  margin: 0 6px;
}
.page-item input, .page-item b {
  line-height: 38px;
  float: left;
  font-weight: 400;
}
.page-item.go-input {
  margin: 0 10px;
}
</style>
</head>
<body>
  <form class="form-inline"
    action="${pageContext.request.contextPath }/book.action?methodName=list"
    method="post">
    <div class="form-group mb-2">
      <input type="text" class="form-control-plaintext" name="bname"
        placeholder="请输入书籍名称">
      <!--      <input name="rows" value="20" type="hidden"> -->
      <!-- 不想分页 -->
      <input name="pagination" value="false" type="hidden">
    </div>
    <button type="submit" class="btn btn-primary mb-2">查询</button>
    <a class="btn btn-primary mb-2"
      href="${pageContext.request.contextPath }/book.action?methodName=toEdit">新增</a>
  </form>
  <table class="table table-striped">
    <thead>
      <tr>
        <th scope="col">书籍ID</th>
        <th scope="col">书籍名</th>
        <th scope="col">价格</th>
        <th scope="col">操作</th>
      </tr>
    </thead>
    <tbody>
      <c:forEach var="b" items="${books }">
        <tr>
          <td>${b.bid }</td>
          <td>${b.bname }</td>
          <td>${b.price }</td>
          <td><a
            href="${pageContext.request.contextPath }/book.action?methodName=toEdit&bid=${b.bid}">修改</a>
            <a
            href="${pageContext.request.contextPath }/book.action?methodName=delete&bid=${b.bid}">删除</a>
          </td>
        </tr>
      </c:forEach>
    </tbody>
  </table>
  <!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
  <z:page pageBean="${pageBean }"></z:page>
</body>
</html>

增加，修改的jsp界面。

判断你点击的是否是增加还是修改

action="${pageContext.request.contextPath }/book.action?methodName=${empty b ? 'add' : 'edit'}"

<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%> 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> 
<!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">
<link
  href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
  rel="stylesheet">
<script
  src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>书籍新增/修改</title>
</head>
<body>
  <form class="form-inline"
    action="${pageContext.request.contextPath }/book.action?methodName=${empty b ? 'add' : 'edit'}" method="post">
    书籍ID：<input type="text" name="bid" value="${b.bid }"><br>
    书籍名称：<input type="text" name="bname" value="${b.bname }"><br>
    书籍价格：<input type="text" name="price" value="${b.price }"><br>
    <input type="submit">
  </form>
</body>
</html>