html+ajax+ssm写的增删改查

package action.web; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import action.entity.Student; import action.service.StudentService; import net.sf.json.JSONArray; import net.sf.json.JSONObject; @Controller public class StudentController { @Autowired private StudentService studentService; //用ModelAndView转到login.html(登录界面) @RequestMapping("toLogin") public ModelAndView toLogin() { ModelAndView mv=new ModelAndView(); mv.setViewName("login"); return mv; } //登录方法 @RequestMapping("login") @ResponseBody public JSONObject login(@RequestParam(defaultValue="username",required=false)String username, @RequestParam(defaultValue="password",required=false)String password, HttpServletRequest request){ Student student=studentService.checkLogin(username, password); //if(student!=null){ JSONObject student_json = JSONObject.fromObject(student); System.out.println("student_json="+student_json); return student_json; //} //return null; } //显示所有数据 @RequestMapping("list") @ResponseBody public JSONArray list(){ List<Student> list=studentService.findAll(); JSONArray json=JSONArray.fromObject(list); return json; } //修改数据 @RequestMapping("update") @ResponseBody public String update(@RequestParam Map<Object,Object> map){ //Object转Integer类型 Integer id = Integer.parseInt(map.get("id").toString()); System.out.println("id="+id); Student student=studentService.findById(id); String name=String.valueOf(map.get("name")); String username=String.valueOf(map.get("username")); String password=String.valueOf(map.get("password")); String sex=String.valueOf(map.get("sex")); String classname=String.valueOf(map.get("classname")); Integer chinese=Integer.parseInt(map.get("chinese").toString()); Integer english=Integer.parseInt(map.get("english").toString()); Integer math=Integer.parseInt(map.get("math").toString()); //给student赋值 student.setName(name); student.setUsername(username); student.setPassword(password); student.setSex(sex); student.setClassname(classname); student.setChinese(chinese); student.setEnglish(english); student.setMath(math); int num=studentService.updateById(student); return String.valueOf(num); } //添加数据 @RequestMapping("saveStudent") @ResponseBody public String saveStudent(@RequestParam Map<Object,Object> map){ //用map接收值 String name=String.valueOf(map.get("name")); String username=String.valueOf(map.get("username")); String password=String.valueOf(map.get("password")); String sex=String.valueOf(map.get("sex")); String classname=String.valueOf(map.get("classname")); Integer chinese=Integer.parseInt(map.get("chinese").toString()); Integer english=Integer.parseInt(map.get("english").toString()); Integer math=Integer.parseInt(map.get("math").toString()); //给student赋值 Student student=new Student(); student.setName(name); student.setUsername(username); student.setPassword(password); student.setSex(sex); student.setClassname(classname); student.setChinese(chinese); student.setEnglish(english); student.setMath(math); int num=studentService.saveStudent(student); return String.valueOf(num); } //删除数据 @RequestMapping("deleteStudent") @ResponseBody public String deleteStudent(@RequestParam(defaultValue="id",required=false)Integer id){ int num=studentService.deleteStudent(id); return String.valueOf(num); } }