POJO 对象绑定请求参数值

来源：互联网发布：mac口红代购价格多少编辑：程序博客网时间：2024/05/21 18:41

Spring MVC 会按请求参数名和 POJO 属性名进行自动匹配,自动为该对象填充属性值。支持级联属性。

ex:

添加如下的表单:

form action="springmvc/testPojo" method="post">    username:<input type="text" name="username"/>    <br>    password:<input type="password" name="password"/>    <br>    email:<input type="text" name="email"/>    <br>    age:<input type="text" name="Submit">    <br>    city:<input type="text" name="address.city">    <br>    province:<input type="text" name="address.province">    <br>    <input type="submit" value="Submit"></form>

添加实体类:

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

public class User {    private String username;    private String password;    private String email;    private int age;    private Address address;    public Address getAddress() {        return address;    }    public void setAddress(Address address) {        this.address = address;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    @Override    public String toString() {        return "User{" +                "username='" + username + '\'' +                ", password='" + password + '\'' +                ", email='" + email + '\'' +                ", age=" + age +                ", address=" + address +                '}';    }}

@RequestMapping("/springmvc")@Controllerpublic class HelloWorld { @RequestMapping("/testPojo")    public String  testPojo(User user){        System.out.println("testPojo:"+user);        return "success";    }}

当表单提交的时候，对象就被赋上了值

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