@Data
public class User{
int id;
String name;
int age;
}
查询单个属性值
final String sql = "select name from User where age=:age ";
Map<String, String> params = new HashMap<>(1);
params.put("age", age);
List<String> names = namedParameterJdbcTemplate.queryForList(sql , params, String.class);
查询bean集合(无需实现RowMappe接口)
String sql = "select * from User where age=:age";
Map<String, String> params = new HashMap<>(1);
params.put("age", age);
List<User> users= namedParameterJdbcTemplate.query(sql, params, new BeanPropertyRowMapper(User.class));