复杂类型的绑定

最新推荐文章于 2023-05-16 09:00:00 发布

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最新推荐文章于 2023-05-16 09:00:00 发布

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分类专栏： Java基础知识文章标签： java 开发语言

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本文介绍了如何在Java中处理复杂对象的表单提交，包括User和Address类的定义，以及在Spring MVC中如何接收和映射这些对象。通过实例演示了如何正确设置HTML表单控件名称，以便在Controller层有效接收数据。

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复杂类型的绑定
1、准备一个复杂对象

package com.test.pojo;

public class User {

    private String uname;
    private String pwd;
    private int age;
    private Address address;

    public String getUname() {
        return uname;
    }

    public void setUname(String uname) {
        this.uname = uname;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "User{" +
                "uname='" + uname + '\'' +
                ", pwd='" + pwd + '\'' +
                ", age=" + age +
                ", address=" + address +
                '}';
    }
}

package com.test.pojo;

public class Address {

    private String province;

    private String city;

    private String detailAddress;

    public String getProvince() {
        return province;
    }

    public void setProvince(String province) {
        this.province = province;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getDetailAddress() {
        return detailAddress;
    }

    public void setDetailAddress(String detailAddress) {
        this.detailAddress = detailAddress;
    }

    @Override
    public String toString() {
        return "Address{" +
                "province='" + province + '\'' +
                ", city='" + city + '\'' +
                ", detailAddress='" + detailAddress + '\'' +
                '}';
    }
}

2、表单中传值的时候，表单控件名称设置为

属性名和表单的控件名一致

子对象中的属性用属性名.子对象的属性名

<form action="user2/addUser" method="post">
<pre>
    用户名:<input type="text" name="uname" />
    密码:<input type="text" name="pwd" />
    年龄:<input type="text" name="age" />
    省:  <input type="text" name="address.province" />
    市:<input type="text" name="address.city" />
    详细地址:<input type="text" name="address.detailAddress" />
    <input type="submit" name="sub" value="提交" />
</pre>


</form>

3、控制层接收

@RequestMapping("/user2")
public class UserController2 {

    @RequestMapping("/addUser")
    public String addUser(User user)
    {
        //直接用user对象接收
        System.out.println(user);

        return "success";
    }
}