spring-org.springframework.jdbc.IncorrectResultSetColumnCountException

調用spring jdbc接口：

User user = (User) this.jdbcTemplate.queryForObject(
				"SELECT * FROM USER WHERE ID = 1", User.class);

 報錯如下:

Exception in thread "main" org.springframework.jdbc.IncorrectResultSetColumnCountException: Incorrect column count: expected 1, actual 4
	at org.springframework.jdbc.core.SingleColumnRowMapper.mapRow(SingleColumnRowMapper.java:87)
	at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:92)
	at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:1)
	at org.springframework.jdbc.core.JdbcTemplate$1QueryStatementCallback.doInStatement(JdbcTemplate.java:445)
	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:395)
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:455)
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:463)
	at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:471)
	at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:476)
	at com.ylp.dao.UserDao.getById(UserDao.java:45)
	at com.ylp.dao.Test.main(Test.java:17)

 大概意思是：查出的數據有4列，它把jdbc.queryForObject("SELECT * FROM USER WHERE ID = 1", User.class);中的第一列轉換成User.class，所以 expected 1, actual 6，預期1列，但查出來的數據有4列

修改:

RowMapper<User> rm = ParameterizedBeanPropertyRowMapper.newInstance(User.class);
		User user = (User) this.jdbcTemplate.queryForObject(
				"SELECT * FROM USER WHERE ID = 1", rm);