问题是在:
Dao类是不能直接new出来的必须是通过 ApplicationContext applicationContext= new
ClassPathXMLApplicationContext(“springmvc.xml”)erDao dao = (UserDao) ac.getBean(“UserDaoId
得到类UserDao的实例化
从而JdbcTemplate 的值才能获得
否则JdbcTemplate的值为null
package springmvc.Servlet; import java.io.UnsupportedEncodingException; import javax.servlet.http.HttpServletRequest; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.stereotype.Controller; import org.springframework.stereotype.Service; import org.springframework.web.bind.annotation.RequestMapping; import springmvc.Dao.UserDao; import springmvc.bean.User; @Service @Controller public class Servlet { @RequestMapping(“/insert”) public String insert(User user,HttpServletRequest request) { ApplicationContext ac=new ClassPathXmlApplicationContext(“springmvc.xml”); UserDao dao = (UserDao) ac.getBean(“UserDaoId”); try { request.setCharacterEncoding(“utf-8”); String id = request.getParameter(“userid”); String name = request.getParameter(“username”); String password = request.getParameter(“userpassword”); user = new User(id, name, password); System.out.println(user); boolean result =dao.insert(user); if (result) { return “success”; }else { return “defult” ; } } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); return null ; } } }
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