Customize MVC 3.0

1. Make the frame into jar package , Then import the new project , And the dependence of the framework jar Import the package

2. Paging label related files 、 And related helper classes

3. Add the configuration file of the framework 、 as well as web.xml Configuration of

4. complete Book Entity class and bookDao Compiling

package com.zsm.entity;
 
public class Book {
	private int bid;
	private String bname;
	private float price;
	public Book() {
		// TODO Auto-generated constructor stub
	}
	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;
	}
	public Book(int bid, String bname, float price) {
		super();
		this.bid = bid;
		this.bname = bname;
		this.price = price;
	}
	@Override
	public String toString() {
		return "Book [bid=" + bid + ", bname=" + bname + ", price=" + price + "]";
	}
	
}

package com.zsm.dao;
 
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
 
import com.zsm.entity.Book;
import com.zsm.util.BaseDao;
import com.zsm.util.DBAccess;
import com.zsm.util.PageBean;
import com.zsm.util.StringUtils;
 
public class BookDao extends BaseDao<Book>{
//	 Inquire about 
	public List<Book> list(Book book,PageBean pageBean) throws Exception{
		String sql="select * from t_mvc_book where 1=1";
		String bname = book.getBname();
		if(StringUtils.isNotBlank(bname)) {
			sql+=" and bname like '%"+bname+"%'";
		}
		int bid = book.getBid();
//		 The front desk jsp Pass it to the background , As long as it's passed, it's worth it , Not wearing it is the default , The default value is 0
		if(bid!=0) {
			sql+=" and bid = "+bid;
		}
		return super.executeQuery(sql, pageBean, rs ->{
			List<Book> list=new ArrayList<>();
			try {
				while(rs.next()) {
					list.add(new Book(rs.getInt("bid"),rs.getString("bname"),rs.getFloat("price")));
				}
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return list;
		});
	}
	
//	  increase 
	public int add(Book book) throws Exception {
		Connection con = DBAccess.getConnection();
		String sql="insert into t_mvc_book values (?,?,?)";
		PreparedStatement pst = con.prepareStatement(sql);
		pst.setObject(1, book.getBid());
		pst.setObject(2, book.getBname());
		pst.setObject(3, book.getPrice());
		return pst.executeUpdate();
	}
//	  Delete 
	public int del(Book book) throws Exception {
		Connection con = DBAccess.getConnection();
		String sql="delete from t_mvc_book where bid= ?";
		PreparedStatement pst = con.prepareStatement(sql);
		pst.setObject(1, book.getBid());
		return pst.executeUpdate();
	}
	
	
//	  Change 
	public int edit(Book book) throws Exception {
		Connection con = DBAccess.getConnection();
		String sql="update t_mvc_book set bname=?,price=?, where bid=？";
		PreparedStatement pst = con.prepareStatement(sql);
		pst.setObject(3, book.getBid());
		pst.setObject(1, book.getBname());
		pst.setObject(2, book.getPrice());
		return pst.executeUpdate();
	}
	
	
}

And then use junit4 To test
Then it will automatically generate a BookDaoTest:

package com.zsm.dao;
 
import static org.junit.Assert.*;
 
import java.util.List;
 
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
 
import com.zsm.entity.Book;
 
public class BookDaoTest {
	private BookDao bookDao=new BookDao();
	@Before
	public void setUp() throws Exception {
	}
 
	@After
	public void tearDown() throws Exception {
	}
 
	@Test
	public void testList() {
		try {
			List<Book> list = bookDao.list(new Book(), null);
			for (Book book : list) {
				System.out.println(book);
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
 
	@Test
	public void testAdd() {
		fail("Not yet implemented");
	}
 
	@Test
	public void testDel() {
		fail("Not yet implemented");
	}
 
	@Test
	public void testEdit() {
		fail("Not yet implemented");
	}
 
}

5. Complete the general addition, deletion and modification methods

Paging query ：

@Test
	public void testList() {
		try {
			List<Book> list = bookDao.list(new Book(), new PageBean());
			for (Book book : list) {
				System.out.println(book);
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

increase

@Test
	public void testAdd() {
		Book book = new Book(1234321, "1234321", 1234321);
		try {
			bookDao.add(book);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

Change

@Test
	public void testEdit() {
		Book book = new Book(1234321, "123432100", 1234321);
		try {
			bookDao.edit(book);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

Delete

 
	@Test
	public void testDel() {
		Book book = new Book(1234321, "1234321", 1234321);
		try {
			bookDao.del(book);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}