DBUtils练习，增删改查，ResultSetHandler的9个结果处理器

/**
 * DBUtils练习，增删改查，ResultSetHandler的9个结果处理器
 */
public class TestDBUtils {

    @Test
    public void testSelect() throws SQLException {
        QueryRunner queryRunner = new QueryRunner(C3P0Util.getDataSource());
        List query = queryRunner.query("select * from user where password=?",
                new BeanListHandler(User.class), 321);
        for (User u : query) {
            System.out.println(u);
        }
    }

    @Test
    public void testInsert() throws SQLException {
        QueryRunner queryRunner = new QueryRunner(C3P0Util.getDataSource());
        queryRunner.update("insert into user(username,password,email,birthday) values(?,?,?,?)",
                "老张", "123", "[email protected]", "2013-3-2");
    }

    @Test
    public void testUpdate() throws SQLException {
        QueryRunner queryRunner = new QueryRunner(C3P0Util.getDataSource());
        queryRunner.update("update user set username=?,password=? where id=?",
                "王婉婉", "321", 2);
    }

    @Test
    public void testDelete() throws SQLException {
        QueryRunner queryRunner = new QueryRunner(C3P0Util.getDataSource());
        queryRunner.update("delete from user where id=?",
                2);
    }

    @Test
    public void testBatch() throws SQLException {
        QueryRunner queryRunner = new QueryRunner(C3P0Util.getDataSource());
        Object[][] objects = new Object[10][4];
        for (int i = 0; i < objects.length; i++) {
            objects[i][0] = "程啸" + i;
            objects[i][1] = "aaa" + i;
            objects[i][2] = i + "@q.c";
            objects[i][3] = "2017-02-" + i;
        }
        queryRunner.batch("insert into user(username,password,email,birthday) values(?,?,?,?)", objects);
    }

    @Test//ArrayHandler适合取1条数据，把这条数据的每列值封装到一个数组中
    public void test1() throws SQLException {
        QueryRunner qr = new QueryRunner(C3P0Util.getDataSource());
        Object[] query = qr.query("select * from user where id=?", new ArrayHandler(), 13);
        for (Object o : query)
            System.out.println(o);
    }

    @Test//ArrayListHandler适合取多条数据，把这条数据的每列值封装到一个数组中，把数组封装到List中
    public void test2() throws SQLException {
        QueryRunner qr = new QueryRunner(C3P0Util.getDataSource());
        List query = qr.query("select * from user", new ArrayListHandler());
        for (Object[] o : query) {
            for (Object o1 : o)
                System.out.print(o1);
            System.out.println();
        }
    }

    @Test//ColumnListHandler取某一列的数据，封装到List中
    public void test3() throws SQLException {
        QueryRunner qr = new QueryRunner(C3P0Util.getDataSource());
        List