通过button将form表单的数据提交到action层

　

form表单中不需要写action的路径，需要给form表单一个唯一的id，将你要提交的信息的表单中的标签name="action中的javabean对象.javabean属性"。给button按钮添加一个onclick()点击事件，并实现该点击事件，在该onclick()方法中通过ajax将form表单中的数据提交给action层

JSP页面中的代码：
 1             <form id="handleform">
                 <!-- 根据学生id修改学生信息 -->
                 <input type="hidden" name="student.stuid"/><!-- 隐藏学生id -->
                 <div class="input-group el_modellist" role="toolbar">
                     <span class="el_spans">要修改的班级：</span>
                     <select class="selectpicker form-control" name="student.className" id="fmchechunit" title="请选择">
                         <option value="0">--请选择班级--</option>
                         <option value="1">软件一班</option>
                         <option value="2">软件二班</option>
                     </select>
                 </div>
                 <span class="el_spans">学生姓名：</span>
                 <input type="text" id="student.name"/>
                  <div class="input-group el_modellist" role="toolbar">
                      <span class="el_spans">学生详细信息：</span>
                      <textarea id="studentMsg" class="form-control texta" rows="10" name="student.msg"></textarea>
                  </div>

                  <div class="modal-footer">
                       <button id="submitButton" onclick="saveButton()"  type="button" class="btn btn-primary">更新</button>
                    </div>
             </form>
             <script type="text/javascript">
                 function saveButton(){
                         //通过ajax异步将数据发送给action层
                         $.ajax({
                             url : '${pageContext.request.contextPath}/stu/stu_upstudent.action',//这里写上你的action路径
                             data : $("#handleform").serialize(),//将你在form表单上提交的数据序列化
                             type : 'POST',  //提交方式
                             dataType : 'json', //提交的数据类型
                             async:true, //是否异步
                             success : function(data) {//这是个回调函数  data表示从action中传过来的json数据
                             //弹出从action层传过来的json格式的数据(用来显示是否更新成功)
                             alert(data.result);
                             }
                         });
                 }
             </script>

action层中的代码：
 1 @Controller
 @Scope("prototype")
 // 控制层，多例模式
 public class DangerAction extends ActionSupport {

     private Student student;
     public void setStudent(Student student){
         this.student = student;
     }
     public Student getStudent(){
         return this.student;
     }

     @Resource
     private StudentService studentService;
     public StudentService getStudentService() {
         return studentService;
     }
     public void setStudentService(StudentService studentService) {
         this.studentService = studentService;
     }
     public String updateStudent throws Exception{

         boolean flag = studentService.update(student);
         HttpServletResponse response = ServletActionContext.getResponse();

 　　　　　//通过json对象将修改反馈信息响应给jsp
         JSONObject json = new JSONObject();
         if (flag) {
             System.out.println(flag);
             json.put("result", "修改成功");
         } else {
             System.out.println(flag);
             json.put("result", "修改失败");
         }
         System.out.println(json.toString());
         response.setContentType("text/html;charset=UTF-8");
         response.getWriter().write(json.toString());
         return null;//如果不需要跳转页面就写上null,如果要跳转页面就自己另外写上
     }
 }

javabean代码: 
1 public class Student{
     private int stuid;
     private int className;
     private int name;
     private String studentMsg;
     public int getStuid() {
         return stuid;
     }
     public void setStuid(int stuid) {
         this.stuid = stuid;
     }
     public int getClassName() {
         return className;
     }
     public void setClassName(int className) {
         this.className = className;
     }
     public int getName() {
         return name;
     }
     public void setName(int name) {
         this.name = name;
     }
     public String getStudentMsg() {
         return studentMsg;
     }
     public void setStudentMsg(String studentMsg) {
         this.studentMsg = studentMsg;
     }

 }