使用spring框架保持Java对象到json的顺序

我创建了一个JavaSpringMVCWebapp，它提供简单的restful服务。 我有这样的对象类

public class CreateEventWrapper {

    private String Topic;
    private String SubscriptionReference;
    private Date UtcTime;
    private List<Message> Messages;
    ...
}

public class Message {

    private List<Source> Source;
    ...
}

public class Source {

    private String Name;
    private String Value;
    ...
}

我希望该格式与类中的对象顺序相同 比如主题、订阅引用、utcTime、orderm、消息。。 但是我得到了消息、subscriptionReference、utcTime和topic的输出

{
  "messages": [
    {

      "source": [
        {
          "name": "VideoSource",
          "value": "[1]123.avi"
        },
        {
          "name": "AnalyticEngine",
          "value": "FacialRecognition"
        }
      ]
    }
  ],
  "subscriptionReference": "http:\abc",
  "utcTime": 1476990000000,
  "topic": "Face"
}

我可以像类对象顺序一样拥有特定的顺序吗

附上我的spring配置和porm.xml以供参考

rest.servlet.xml

 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/tx
                           http://www.springframework.org/schema/tx/spring-tx.xsd
                           http://www.springframework.org/schema/context 
                           http://www.springframework.org/schema/context/spring-context-3.0.xsd
                           http://www.springframework.org/schema/task
                           http://www.springframework.org/schema/task/spring-task-3.0.xsd
                           http://www.springframework.org/schema/mvc
                           http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">

    <mvc:annotation-driven />

    <mvc:default-servlet-handler/>

    <!-- Activates annotation-based bean configuration -->
    <context:annotation-config />
    <!-- Scans for application @Components to deploy -->
    <context:component-scan base-package="org.itri.ccma.paas.service.event.webservice" />


</beans>

porm.xml

...
    <!-- Json lib -->
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.datatype</groupId>
        <artifactId>jackson-datatype-hibernate4</artifactId>
        <version>2.3.2</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.6.1</version>
    </dependency>

    <!-- jackson -->
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.4.2</version>
    </dependency>

    <!-- Springframework -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
...

。。。
net.sf.json-lib
json库
2.4
jdk15
com.fasterxml.jackson.datatype
jackson-datatype-hibernate4
2.3.2
com.fasterxml.jackson.core
杰克逊注释
2.6.1
org.codehaus.jackson
杰克逊地图绘制者
1.4.2
org.springframework
弹簧芯
4.2.0.1发布
org.springframework
spring上下文
4.2.0.1发布
org.springframework
弹簧网
4.2.0.1发布
org.springframework
SpringWebMVC
4.2.0.1发布
org.springframework
弹簧试验
4.2.0.1发布
...

您应该试试这个

//lower cases since it affects the json output not the class field names
@JsonPropertyOrder({ "topic", "subscriptionReference", "utcTime", "messages" })
public class CreateEventWrapper {

    private String Topic;
    private String SubscriptionReference;
    private Date UtcTime;
    private List<Message> Messages;
    ...
}

//小写，因为它影响json输出，而不是类字段名
@JsonPropertyOrder（{“主题”、“订阅引用”、“utcTime”、“消息”}）
公共类CreateEventWrapper{
私有字符串主题；
私有字符串SubscriptionReference；
私人约会时间；
私人列表消息；
...
}

---

我建议您在代码中使用lowerCamelCase命名变量约定，因为它最流行

@hismart没有问题，记住小写（我在代码中添加了注释）是的。我使用小写字母来解决问题。如果其他人需要此解决方案，请记住小写字母。非常感谢你。

...
    <!-- Json lib -->
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.datatype</groupId>
        <artifactId>jackson-datatype-hibernate4</artifactId>
        <version>2.3.2</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.6.1</version>
    </dependency>

    <!-- jackson -->
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.4.2</version>
    </dependency>

    <!-- Springframework -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>4.2.0.RELEASE</version>
    </dependency>
...

//lower cases since it affects the json output not the class field names
@JsonPropertyOrder({ "topic", "subscriptionReference", "utcTime", "messages" })
public class CreateEventWrapper {

    private String Topic;
    private String SubscriptionReference;
    private Date UtcTime;
    private List<Message> Messages;
    ...
}