利用dbutils工具实现数据的增删查改操作(dbutis入门)

一、前期准备

     1、安装数据库(如:mysql5.5)

     2、安装Eclipse(如:3.4)

     3、下载数据库驱动包

     4、下载dbutis工具包

     5、在Eclipse创建名为 dbutils 的工程并在工程下创建名为lib的文件夹。

   将commons-dbutils-1.2.jar与mySql的驱动包拷贝到lib目录

   选中这两个jar包右击->build path-->Add to build path

二:

1、在scr目录下创建名为dbcpconfig.properties的文件内容如下

 

#连接设置
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mydb
username=root
password=root
#
#
initialSize=10
#最大连接数量
maxActive=50
#
maxIdle=20

#
minIdle=5
#
maxWait=60000
#JDBC驱动建立连接时附带的连接属性属性的格式必须为这样:[属性名=property;] 
#注意:"user" 与 "password" 两个属性会被明确地传递,因此这里不需要包含他们。
connectionProperties=useUnicode=true;characterEncoding=utf8
#指定由连接池所创建的连接的自动提交(auto-commit)状态。
defaultAutoCommit=true
#driver default 指定由连接池所创建的连接的只读(read-only)状态。
#如果没有设置该值,则“setReadOnly”方法将不被调用。(某些驱动并不支持只读模式,如:Informix)
defaultReadOnly=
#driver default 指定由连接池所创建的连接的事务级别(TransactionIsolation)。
#可用值为下列之一:(详情可见javadoc。)NONE,READ_UNCOMMITTED, READ_COMMITTED, REPEATABLE_READ, SERIALIZABLE
defaultTransactionIsolation=READ_COMMITTED

 2、创建包(com.fly31.domain)在该包下创建实体bean

import java.util.Date;
public class User {
	private int id;
	private String name;
	private String password;
	private String email;
	private Date birthday;	
	//getter和setter省略	
}

 然后依据实体bean创建数据表

	 create database mydb;
	 use mydb;
	 create table users(
		id int primary key,
		name varchar(40),
		password varchar(40),
		email varchar(60),
		birthday date
	);

 

3、创建JDBCUtils,用于创建连接

public class JdbcUtils {
	private static DataSource ds;
	
	private static ThreadLocal tl = new ThreadLocal();  //map
	static{
		try{
			Properties prop = new Properties();
			InputStream in = JdbcUtils.class.getClassLoader().getResourceAsStream("dbcpconfig.properties");
			prop.load(in);
			BasicDataSourceFactory factory = new BasicDataSourceFactory();
			ds = factory.createDataSource(prop);
		}catch (Exception e) {
			throw new ExceptionInInitializerError(e);
		}
	}
	
	public static DataSource getDataSource(){
		return ds;
	}
	
	public static Connection getConnection() throws SQLException{
		try{
			//得到当前线程上绑定的连接
			Connection conn = tl.get();
			if(conn==null){  //代表线程上没有绑定连接
				conn = ds.getConnection();
				tl.set(conn);
			}
			return conn;
		}catch (Exception e) {
			throw new RuntimeException(e);
		}
	}
}

 

现在准备工作已经完成,可以用dbutils做增删查改操作了。

 

三、用dbutis对数据进行增删查改操作。

创建包(com.fly31.dbutils),在该包下创建类名为TestDbutils类

import java.sql.SQLException;
import java.util.Date;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.junit.Test;

import cn.itcast.domain.User;
import cn.itcast.utils.JdbcUtils;

public class TestDbutils{	
	//使用dbutils完成数据库的crud	
	@Test
	public void insert() throws SQLException{
		QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource());
		String sql = "insert into users(id,name,password,email,birthday) values(?,?,?,?,?)";
		Object params[] = {2,"bbb","123","[email protected]",new Date()};
		runner.update(sql, params);
	}
	
	@Test
	public void update() throws SQLException{
		QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource());
		String sql = "update users set email=? where id=?";
		Object params[] = {"[email protected]",1};
		runner.update(sql, params);
	}
	
	@Test
	public void delete() throws SQLException{
		QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource());
		String sql = "delete from users where id=?";
		runner.update(sql, 1);
	}
	
	@Test
	public void find() throws SQLException{
		QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource());
		String sql = "select * from users where id=?";
		User user = (User) runner.query(sql, 1, new BeanHandler(User.class));
		System.out.println(user.getEmail());
	}
	
	
	@Test
	public void getAll() throws Exception{
		QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource());
		String sql = "select * from users";
		List list = (List) runner.query(sql, new BeanListHandler(User.class));
		System.out.println(list);
	}
	
	@Test
	public void batch() throws SQLException{
		QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource());
		String sql =  "insert into users(id,name,password,email,birthday) values(?,?,?,?,?)";
		Object params[][] = new Object[3][5];
		for(int i=0;i

 

 

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