springmvc入门demo

package com.mvc.controller; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.mvc.entity.Student; import com.mvc.service.StudentService; @Controller @RequestMapping("/student.do") public class StudentController { protected final transient Log log = LogFactory .getLog(StudentController.class); @Autowired private StudentService studentService; public StudentController(){ } @RequestMapping public String load(ModelMap modelMap){ List<Object> list = studentService.getStudentList(); modelMap.put("list", list); return "student"; } @RequestMapping(params = "method=add") public String add(HttpServletRequest request, ModelMap modelMap) throws Exception{ return "student_add"; } @RequestMapping(params = "method=save") public String save(HttpServletRequest request, ModelMap modelMap){ String user = request.getParameter("user"); String psw = request.getParameter("psw"); Student st = new Student(); st.setUser(user); st.setPsw(psw); try{ studentService.save(st); modelMap.put("addstate", "添加成功"); } catch(Exception e){ log.error(e.getMessage()); modelMap.put("addstate", "添加失败"); } return "student_add"; } @RequestMapping(params = "method=del") public void del(@RequestParam("id") String id, HttpServletResponse response){ try{ Student st = new Student(); st.setId(Integer.valueOf(id)); studentService.delete(st); response.getWriter().print("{\"del\":\"true\"}"); } catch(Exception e){ log.error(e.getMessage()); e.printStackTrace(); } } }