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;
    }
    
}