SpringMVC 6. 使用 POJO 对象绑定请求参数值

系统管理员 2022-05-27 12:22 169阅读 0赞

# 使用 POJO 对象绑定请求参数值 #

**SpringMVC 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。如：address.provice、user.address.tel 等**

**cotroller类:**

@RequestMapping("/springmvc")
    @Controller
    public class TestPOJO {
        public static final String SUCCESS = "success" ;
    
        @RequestMapping(value = "/testPOJO")
        public String testPOJO(User user){
            System.out.println("testPOJO:"+ user);
            System.out.println("testPOJO");
            return SUCCESS ;
        }
    }

**entities类**

*  User.java

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

*  Address .java

public class Address {
        private String city ;
        private String provice ;
    
        public String getCity() {
            return city;
        }
    
        public void setCity(String city) {
            this.city = city;
        }
    
        public String getProvice() {
            return provice;
        }
    
        public void setProvice(String provice) {
            this.provice = provice;
        }
    
        @Override
        public String toString() {
            return "Address{" +
                    "city='" + city + '\'' +
                    ", provice='" + provice + '\'' +
                    '}';
        }
    }

**jsp页面:**

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>POJO</title>
    </head>
    <body>
    <form action="/springmvc/testPOJO" method="post">
        <br>
        username:<input type="text" name="username">
        <br>
        password:<input type="password" name="password">
        <br>
        age:<input type="text" name="age">
        <br>
        email:<input type="text" name="email">
        <br>
        city:<input type="text" name="address.city">
        <br>
        provice:<input type="text" name="address.provice">
        <br>
        <input type="submit" value="submit">
    
    </form>
    </body>
    </html>

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[SpringMVC 5. RequestParam_RequestHeader_CookieValue]: https://blog.csdn.net/hgx_suiyuesusu/article/details/79993488
[SpringMVC 7. _ Servlet API]: https://blog.csdn.net/hgx_suiyuesusu/article/details/79994881