利用dbutils框架简化jdbc开发

1.首先要导入要用的jar包

 

commons-dbcp-1.2.2.jar

commons-dbutils-1.2.jar

commons-pool.jar

mysql-connector-java-5.0.8-bin.jar

 

 

2.修改配置文件

参考模板：

 

#连接设置
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/day17
username=root
password=root

#<!-- 初始化连接 -->
initialSize=10

#最大连接数量
maxActive=50

#<!-- 最大空闲连接 -->
maxIdle=20

#<!-- 最小空闲连接 -->
minIdle=5

#<!-- 超时等待时间以毫秒为单位 6000毫秒/1000等于60秒 -->
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

 

 

 

3.java 编写utils工具类

public class JdbcUtils {

	private static DataSource datesourse;
	private static Properties properties = new Properties();
	static {
		try {
			properties.load(JdbcUtils.class.getClassLoader()
					.getResourceAsStream("dbcpconfig.properties"));
			BasicDataSourceFactory factory = new BasicDataSourceFactory();
			datesourse = factory.createDataSource(properties);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}


	public static DataSource getDataSource() {
		return datesourse;
	}

	

}

 

4.调用demo

 

 

public class Demo1 {

	/*
	 create database day17;
	 use day17;
	 create table users(
		id int primary key,
		name varchar(40),
		password varchar(40),
		email varchar(60),
		birthday date
	);
	 */
	
	//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<params.length;i++){  //3
			params[i] = new Object[]{i+1,"aa"+i,"123",i + "@sina.com",new Date()};
		}
		runner.batch(sql, params);
	}
}