Incorrect column count: expected 1, actual 5
在使用jdbc的querForObject queryForList的时候，出现Incorrect column count: expected 1, actual 5
比如
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String sql = "select * from sysuser where id = 3";
SysUser s = this.jdbcTemplate.queryForObject(sql, SysUser.class);
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其实这样是不对的，
应该为
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3
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String sql = "select name from sysuser where id = 3";
String s = this.jdbcTemplate.queryForObject(sql, String.class);
System.out.println(s); |
这个 jdbcTemplate.queryForObject(sql, requiredType) 中的requiredType应该为基础类型，和String类型。
如果想查真正的object应该为
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List<SysUser> userList = jdbcTemplate.query(sql, new Object[]{}, new BeanPropertyRowMapper<SysUser>(SysUser.class));
if(null!=userList&&userList.size()>0){
SysUser user = userList.get(0);
} |
在使用jdbc的querForObject queryForList的时候，出现Incorrect column count: expected 1, actual 5
比如
|
1
2
|
String sql = "select * from sysuser where id = 3";
SysUser s = this.jdbcTemplate.queryForObject(sql, SysUser.class);
|
其实这样是不对的，
应该为
|
1
2
3
|
String sql = "select name from sysuser where id = 3";
String s = this.jdbcTemplate.queryForObject(sql, String.class);
System.out.println(s); |
这个 jdbcTemplate.queryForObject(sql, requiredType) 中的requiredType应该为基础类型，和String类型。
如果想查真正的object应该为
|
1
2
3
4
|
List<SysUser> userList = jdbcTemplate.query(sql, new Object[]{}, new BeanPropertyRowMapper<SysUser>(SysUser.class));
if(null!=userList&&userList.size()>0){
SysUser user = userList.get(0);
} |