Spring Boot 2.7.8
我有一个简单的 POJO,称为参与者。前端发送一个带有我想要存储在数据库中的字段 IP 的 API 请求。但是在后端我将此字段设置为空。我将此字段标记为 jsonIgnore 的原因是因为我不希望此字段包含在有效的 get API 响应中。我在响应中没有看到此字段,但在初始 API 中,该字段被映射为 null,因此我无法存储它。
import com.fasterxml.jackson.annotation.JsonIgnore;
@Entity
@Table(name="participant")
public class Participant {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long participantId;
private String ip;
public void setIp(String ip) {
this.ip = ip;
}
@JsonIgnore
public String getIp(){return this.ip;}
}
休息控制器
@RequestMapping(value = "api/test", method = RequestMethod.POST)
public ResponseEntity<?> addParticipant(@RequestBody Participant p) {
.....
}
Pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>master</groupId>
<artifactId>hype</artifactId>
<version>0.1</version>
<packaging>war</packaging>
<name>hype</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>20</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-resource-server</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
</dependencies>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.8</version>
<relativePath />
</parent>
</project>
前端API负载包含字段值
{
ip : "172.1.1.1"
}
但是在后端它是空的
{
ip: null
}
@JsonIgnore 在字段级别使用来标记要忽略的属性或属性列表。 :)
具有系统设计。您不应将实体用于请求/响应 dto。为了系统安全,您应该提供请求/响应 dto,然后将 dto 与实体映射(在业务逻辑之后),然后将数据保存到数据库中。 (适配器设计模式)
这种方式的优点: