调用 jdbcTemplate.queryForList 时出现错误 spring-org.springframework.jdbc.IncorrectResultSetColumnCountException

查找到解决方法： http://www.cnblogs.com/wumian/articles/2012-10-25-2056.html

调用spring jdbc接口：

User user = (User) this.jdbcTemplate.queryForObject(

"SELECT * FROM USER WHERE ID = 1", User.class);

报错如下:

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：查出的数据有4列，它把jdbc.queryForObject("SELECT * FROM USER WHERE ID = 1", User.class);中的第一列转换成User.class，所以 expected 1, actual 6，预期1列，但查出来的数据有4列

修改:

RowMapper<User> rm = ParameterizedBeanPropertyRowMapper.newInstance(User.class);

User user = (User) this.jdbcTemplate.queryForObject(

"SELECT * FROM USER WHERE ID = 1", rm);

时间： 2024-11-08 09:03:55

错误：org.springframework.jdbc.support.SQLErrorCodesFactory - SQLErrorCodes loaded