Spring 中的jdbcTemplate 封装对象

第一种方式 ：带参数的封装方式
Actor actor = this.jdbcTemplate.queryForObject(
"select first_name, last_name from t_actor where id = ?",
new Object[]{1212L},
new RowMapper<Actor>() {
public Actor mapRow(ResultSet rs, int rowNum) throws SQLException {
Actor actor = new Actor();
actor.setFirstName(rs.getString("first_name"));
actor.setLastName(rs.getString("last_name"));
return actor;
}
});

 

第二种方式：未带输入参数的 封装方式 匿名类
 List<Actor> actors = this.jdbcTemplate.query(
"select first_name, last_name from t_actor",
new RowMapper<Actor>() {
public Actor mapRow(ResultSet rs, int rowNum) throws SQLException {
Actor actor = new Actor();
actor.setFirstName(rs.getString("first_name"));
actor.setLastName(rs.getString("last_name"));
return actor;
}
});

第三种：内部私有类的方式public List<Actor> findAllActors() {
return this.jdbcTemplate.query( "select first_name, last_name from t_actor", new ActorMapper());
}

private static final class ActorMapper implements RowMapper<Actor> {

public Actor mapRow(ResultSet rs, int rowNum) throws SQLException {
Actor actor = new Actor();
actor.setFirstName(rs.getString("first_name"));
actor.setLastName(rs.getString("last_name"));
return actor;
}
}

第四种方式：
public Actor findActor(String specialty, int age) {
    String sql = "select id, first_name, last_name from T_ACTOR" +
            " where specialty = ? and age = ?";
    RowMapper<Actor> mapper = new RowMapper<Actor>() {
        public Actor mapRow(ResultSet rs, int rowNum) throws SQLException {
            Actor actor = new Actor();
            actor.setId(rs.getLong("id")); actor.setFirstName(rs.getString("first_name"));
            actor.setLastName(rs.getString("last_name"));
            return actor;
        }
    };
    // notice the use of varargs since the parameter values now come
    // after the RowMapper parameter
    return this.simpleJdbcTemplate.queryForObject(sql, mapper, specialty, age);
}
四种方式，仅供参考