我正在使用Spring设置使用json映射转换器将POJO类作为json发送回客户端。
E.g:
@RequestMapping
@ResponseBody
public User getUser() {
User user = getUser();
return user;
}
这将返回,例如类似客户的事情:
{ 'username': 'My username', 'lastname': 'My lastname' }
我想拦截我所有的控制器动作,将json包装成:
{
'status': 200,
'data': { 'username': 'My username', 'lastname': 'My lastname' }
}
最好的办法是什么?
答案 0 :(得分:0)
简单地说,您可以创建这样的地图
@RequestMapping(value = "/user")
@ResponseBody
public Map<String, Object> getUser(){
User user = new User();
Map<String, Object> map = new HashMap<String, Object>();
map.put("status", 200);
map.put("data", user);
return map;
}
对于常见用法,您可以创建POJO
public static class ResutInfo{
private int status;
private Object data;
//get set}
然后编写控制器方法
@RequestMapping(value = "/user")
@ResponseBody
public ResutInfo getUser2(){
User user = new User();
ResutInfo resutInfo = new ResutInfo();
resutInfo.setStatus(200);
resutInfo.setData(user);
return resutInfo;
}
答案 1 :(得分:0)
我通过扩展MappingJackson2HttpMessageConverter
public class MyMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter {
@Override
protected void writeInternal(Object object, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException {
//outputMessage.getHeaders().add("code", DigestUtils.md5Hex(object.toString()));
Map<String, Object> map = new HashMap<String, Object>();
map.put("status", 200);
map.put("data", object);
super.writeInternal(map, outputMessage); //To change body of overridden methods use File | Settings | File Templates.
}
}
然后将自己的conventer bean添加到spring-mvc配置文件
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="com.xxx.utils.MyMappingJackson2HttpMessageConverter">
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<mvc:default-servlet-handler/>
此方法适用于每个@ResponseBody
处理程序方法。
请注意它会更改默认的Spring操作,您应该考虑一下。
答案 2 :(得分:0)
You can also do something like this
<mvc:annotation-driven> <!-- this is added for validations to work -->
<mvc:message-converters register-defaults="true">
<ref bean="jsonMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="objectMapper" ref="YourDtoWrapper"/>
</bean>
<bean id="YourDtoWrapper" class="com.YourDtoWrapper"/>
inside your YourDtoWrapper class you can do something like this
public void writeValue(JsonGenerator jgen, Object value) throws IOException, JsonGenerationException, JsonMappingException {
SomeDTO<Object> someDto = new SomeDTO<Object>("SUCCESS");//you can use an enum here
someDto.setDto(value);//here dto is a property of someDTO
super.writeValue(jgen, SomeDTO.getAsMap(someDto));
}
this will give u result some thing like this
{
serviceResult: "SUCCESS"
context: null
dto: {
id: 1
firstName: "test"
lastName: "admin"
email: "admin@test.com"
phone: 1234
userName: "admin"
password: null
createdBy: "admin"
createdDate: null
statusId: 1
statusName: "ACTIVE"
organisationId: 1
organisationName: "test"
userTypeId: 1
userTypeName: "ADMIN"
roleIds: [0]
}
}