概述
我做了一个控制器,在其中我通过自动连线传递Dao并使用jdbctemplate执行查询。
控制器调用dao中的方法从数据库中检索表。
代码
控制器
@Controller
public class ManagerRoles {
@Autowired
EmployeeDao dao;
@RequestMapping("getEmployeeSchedule/{empID}")
public ModelAndView employeeData(@PathVariable("empID")int empID,HttpServletRequest req,HttpServletResponse res,ModelMap model){
long millis=System.currentTimeMillis();
Date dateStart = new Date(millis);
Date dateFinal = new Date(dateStart.getYear(),dateStart.getMonth(),dateStart.getDate()+30);
System.out.println(dateStart);
System.out.println(dateFinal);
List<EmployeeHolidays> holidayList = dao.retrieveHolidays(dateStart, dateFinal);
if(holidayList!=null){
model.put("holidayList",holidayList);
}
System.out.println(holidayList);
return null;
}
}
DAO
public List<EmployeeHolidays> retrieveHolidays(Date startDate,Date endDate){
String sql = "SELECT * FROM HOLIDAYS WHERE DATE >= ? AND DATE <= ? ";
List<EmployeeHolidays> list = template.query(sql ,new RowMapper<EmployeeHolidays>(){
public EmployeeHolidays mapRow(ResultSet rs,int rownumber) throws SQLException{
EmployeeHolidays e = new EmployeeHolidays();
e.setDate(rs.getDate(1));
e.setReason(rs.getString(2));
e.setStatus(rs.getString(3));
return e;
}
});
return list;
}
问题在于,当我尝试运行Web应用程序时,尝试检索表数据时出现以下错误。
类型异常报告
消息请求处理失败;嵌套异常为 org.springframework.dao.ConcurrencyFailureException: StatementCallback; SQL [SELECT * FROM HOLIDAYS WHERE DATE> =?和 DATE <=? ];当前语句的至少一个参数是 未初始化。嵌套异常为 java.sql.SQLTransactionRollbackException:至少一个参数 当前语句尚未初始化。
说明服务器遇到意外情况, 阻止它满足请求。
例外
org.springframework.web.util.NestedServletException:请求 处理失败;嵌套异常为 org.springframework.dao.ConcurrencyFailureException: StatementCallback; SQL [SELECT * FROM HOLIDAYS WHERE DATE> =?和 DATE <=? ];当前语句的至少一个参数是 未初始化。嵌套异常为 java.sql.SQLTransactionRollbackException:至少一个参数 当前语句未初始化。 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
我检查了我要传递的参数,它们都有值。
我似乎找不到问题的根源。有人可以帮我吗?
答案 0 :(得分:2)
您忘记将parameters
作为arguments
添加到查询方法中,请看这里:
public List<EmployeeHolidays> retrieveHolidays(Date startDate,Date endDate){
String sql = "SELECT * FROM HOLIDAYS WHERE DATE >= ? AND DATE <= ? ";
List<EmployeeHolidays> list = template.query(
sql ,
new Object[] { startDate, endDate} //add this
new RowMapper<EmployeeHolidays>(){
public EmployeeHolidays mapRow(ResultSet rs,int rownumber) throws SQLException{
EmployeeHolidays e = new EmployeeHolidays();
e.setDate(rs.getDate(1));
e.setReason(rs.getString(2));
e.setStatus(rs.getString(3));
return e;
}
});
return list;
}