Struts2中action类收不到表单提交的数据

利用Struts2技术，action类收不到表单提交的数据

package com.model;

import com.tool.MyDataBase;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class Student {
    private String id;
    private String name;
    private int stu_class;
    private int grade;

    public int getStu_class() {
        return stu_class;
    }

    public void setStu_class(int stu_class) {
        this.stu_class = stu_class;
    }

    private HomeWork homeWork;

    public HomeWork getHomeWork() {
        return homeWork;
    }

    public void setHomeWork(HomeWork homeWork) {
        this.homeWork = homeWork;
    }

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public int getGrade() {
        return grade;
    }

    public void setId(String id) {
        this.id = id;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setGrade(int grade) {
        this.grade = grade;
    }

    public Student() {
    }

    public Student(String id, String name, int stuClass, int grade) {
        this.id = id;
        this.name = name;
        this.stu_class = stuClass;
        this.grade = grade;
    }

    @Override
    public String toString() {
        return "Student{" +
                "id='" + id + '\'' +
                ", name='" + name + '\'' +
                ", stuClass=" + stu_class +
                ", grade=" + grade +
                ", homeWork=" + homeWork +
                '}';
    }
}

action类

public class addStuAction {
    private Student stu;

    public addStuAction() {
        System.out.println("Student初始化完成！！");
    }
 public String addstu() throws SQLException {

        if(stu!=null) {
            System.out.println(stu.toString());
            Connection con = MyDataBase.getCon();
            String sql = "insert into student(id,name,grade,stu_class) value(?,?,?,?)";
            PreparedStatement ps = con.prepareStatement(sql);
            ps.setString(1, stu.getId());
            ps.setString(2, stu.getName());
            ps.setInt(3, stu.getGrade());
            ps.setInt(4, stu.getStu_class());
            boolean temp = ps.execute();
            MyDataBase.close(con, ps, null);
            if (temp) {
                System.out.println("添加成功！");
                return "True";
            }
        }
        return "False";

    }
}

struts2配置文件



struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="AddStu" extends="struts-default" namespace="/">
        <action name="addStu" class="com.action.addStuAction" method="addstu">
            <result name="True">/Teacher/addStuPage.jspresult>
            <result name="False">/index.jspresult>
        action>

    package>

struts>

表单

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>新增学生title>
    <link rel="stylesheet" type="text/css"
          href="../css/addStudent.css" >
head>
<body>
 <s:form namespace="/" action="addStu" method="POST">

    <div id="all">

        <h1>添加学生h1>

        <div id="stuId">
            学号  <input type="text" name="stu.id">
        div>

        <div id="name" >
            姓名  <input type="text" name="stu.name">
        div>

        <div id="grade" >
            班级  <input type="text" name="stu.grade">
        div>

        <div  id="stuClass">
            年级  <input type="text" name="stu.stu_class">

        div>
        <div id="submit">
            <button type="submit" id="btns">添加button>
        div>
        <div  id="reset">
            <button type="reset" id="btn_cl">重置button>
        div>
        s:form>
    div>
body>
html>

结构图

img

addStuAction 类中可以试试添加 setStu() 的方法