实现数据库版的图书管理系统

数据库设计

添加操作

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import java.sql.PreparedStatement;
import java.sql.SQLException;

public class AddBooks {
    
    
    public static void main(String[] args) throws SQLException {
    
    
        //1，获得数据源DataSource(设置Mysql的服务器地址)
        MysqlDataSource dataSource=new MysqlDataSource();
        dataSource.setURL("jdbc:mysql://127.0.0.1:3306/book?characterEncoding=utf8&&useSSL=true");
        dataSource.setUser("root");
        dataSource.setPassword("123456");
        //2.获得连接
        Connection connection= (Connection) dataSource.getConnection();
        //3.得到执行器
        String insertSQL="insert into books(name,author) values(?,?)";
        PreparedStatement statement=connection.prepareStatement(insertSQL);
        statement.setString(1,"水浒传");
        statement.setString(2,"施耐庵");
        //4.执行SQL
        int result=statement.executeUpdate();
        System.out.println("受影响的行数:"+result);
        //5.关闭资源
        statement.close();
        connection.close();
    }
}

修改操作

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class UpBooks {
    
    
    public static void main(String[] args) throws SQLException {
    
    
        MysqlDataSource dataSource=new MysqlDataSource();
        dataSource.setURL("jdbc:mysql://127.0.0.1:3306/book?characterEncoding=utf8&useSSL=true");
        dataSource.setUser("root");
        dataSource.setPassword("123456");
        Connection connection=(Connection) dataSource.getConnection();
        String updateSql="update books set name=? where id=?";
        PreparedStatement statement=connection.prepareStatement(updateSql);
        statement.setString(1,"西游记2");
        statement.setInt(2,1);
        int result=statement.executeUpdate();
        System.out.println("受影响的行数:"+result);
        statement.close();
        connection.close();
    }
}

删除操作

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import java.sql.PreparedStatement;
import java.sql.SQLException;
//删除操作
public class DelBooks {
    
    
    public static void main(String[] args) throws SQLException {
    
    
        MysqlDataSource dataSource=new MysqlDataSource();
        dataSource.setURL("jdbc:mysql://127.0.0.1:3306/book?characterEnding=utf8&useSSL=true");
        dataSource.setUser("root");
        dataSource.setPassword("123456");
        Connection connection=(Connection) dataSource.getConnection();
        String delSql="delete from books where id=?";
        PreparedStatement statement=connection.prepareStatement(delSql);
        statement.setInt(1,1);
        int result=statement.executeUpdate();
        System.out.println("受影响的行数:"+result);
        statement.close();
        connection.close();
    }
}

查询操作

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
//查询操作
public class SelBooks {
    
    
    public static void main(String[] args) throws SQLException {
    
    
        //1.获得数据源
        MysqlDataSource dataSource=new MysqlDataSource();
        dataSource.setURL("jdbc:mysql://127.0.0.1:3306/book?characterEncoding=utf8&useSSL=true");
        dataSource.setUser("root");
        dataSource.setPassword("123456");
        //2.获得连接
        Connection connection=(Connection)dataSource.getConnection();
        //3.获得执行器
        String sql="select * from books where id<?";
        PreparedStatement statement=connection.prepareStatement(sql);
        statement.setInt(1,5);
        //4.执行SQL,打印查询结果
        ResultSet resultSet=statement.executeQuery();
        while(resultSet.next()){
    
    
            Books books=new Books();
            books.setId(resultSet.getInt("id"));
            books.getName(resultSet.getString("name"));
            books.setAuthor(resultSet.getString("author"));
            System.out.println(books);
        }
        //关闭资源
        resultSet.close();
        statement.close();
        connection.close();
    }
}