java传值至前端，例如我只想传一个company到前端去而又不想产生那么多null，有什么方法可以做到吗？

Question

                "name": null,
                "username": null,
                "parent_id": null,
                "address": null,
                "contacts": null,
                "tel": null,
                "company": "123",
                "role_id": null,
                "email": null,
                "status": null,
                "createTime": null,
                "updateTime": null,
                "lastLoginTime": null,
                "markCode": null,
                "labels_name": null,
                "position_name": null,
                "deviceStateCount": null,

ps:不用想map,就用bean 可以做到吗

Answer 1

可以使用注解@JsonInclude(Include.NON_EMPTY)
不过需要添加包

<!-- jackson -->  
<dependency>  
    <groupId>com.fasterxml.jackson.core</groupId>  
    <artifactId>jackson-core</artifactId>  
    <version>2.2.3</version>  
</dependency>  
<dependency>  
    <groupId>com.fasterxml.jackson.core</groupId>  
    <artifactId>jackson-databind</artifactId>  
    <version>2.2.3</version>  
</dependency>  
<dependency>  
    <groupId>com.fasterxml.jackson.core</groupId>  
    <artifactId>jackson-annotations</artifactId>  
    <version>2.2.3</version>  
</dependency>