Spring MVC Rest响应JSON和XML [英] spring mvc rest response json and xml
问题描述
我需要以xml结构或json结构的字符串形式从数据库返回结果. 我有一个解决方案，但我不知道这是否是解决此问题的最佳方法. 我这里有两种方法:
I have the requirement to return the result from the database either as a string in xml-structure or as json-structure. I've got a solution, but I don't know, if this one is the best way to solve this. I have two methods here:
@RequestMapping(value = "/content/json/{ids}", method = RequestMethod.GET)
public ResponseEntity<String> getContentByIdsAsJSON(@PathVariable("ids") String ids)
{
String content = null;
StringBuilder builder = new StringBuilder();
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.add("Content-Type", "text/html; charset=utf-8");
// responseHeaders.add("Content-Type", "application/json; charset=utf-8");
List<String> list = this.contentService.findContentByListingIdAsJSON(ids);
if (list.isEmpty())
{
content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><error>no data found</error>";
return new ResponseEntity<String>(content, responseHeaders, HttpStatus.CREATED);
}
for (String json : list)
{
builder.append(json + "\n");
}
content = builder.toString();
return new ResponseEntity<String>(content, responseHeaders, HttpStatus.CREATED);
}
@RequestMapping(value = "/content/{ids}", method = RequestMethod.GET)
public ResponseEntity<String> getContentByIdsAsXML(@PathVariable("ids") String ids)
{
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.add("Content-Type", "application/xml; charset=utf-8");
String content = this.contentService.findContentByListingIdAsXML(ids);
if (content == null)
{
content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><error>no data found</error>";
return new ResponseEntity<String>(content, responseHeaders, HttpStatus.CREATED);
}
return new ResponseEntity<String>(content, responseHeaders, HttpStatus.CREATED);
}
对于第一种方法，我需要一个更好的解决方案，我已经在这里问过: spring mvc rest mongo dbobject响应
for the first method I need a better solution, which I already asked here: spring mvc rest mongo dbobject response
接下来的事情是，我在配置中插入了一个json转换器:
The next thing is, that I inserted in the configuration a json converter:
<bean id="jsonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="supportedMediaTypes" value="application/json"/>
</bean>
当我将第一种方法的content-type更改为"application/json"时，它可以工作，但是xml响应不再起作用，因为json转换器希望将xml字符串转换为json-structure我想.
when I change the content-type at the first method to "application/json", it works, but then the xml response doesn't work anymore, because the json converter wants to convert the xml string to json-structure I think.
我该怎么办，那个春天确定了一个方法应返回json类型而另一个方法应将普通xml作为字符串返回的区别? 我用接受标志尝试了它:
what can I do, that spring identifies the difference that the one method should return a json type and the other one a normal xml as string? I tried it with the accept flag:
@RequestMapping(value = "/content/json/{ids}", method = RequestMethod.GET, headers = "Accept=application/json")
但这是行不通的.我收到以下错误:
but this doesn't work. I get the following error:
org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.StackOverflowError
我希望有人能帮助我.
推荐答案
如果使用的是Spring 3.1，则可以利用@RequestMapping批注中新的produces元素来确保您生成XML或JSON，如下所示:您希望，即使在同一应用内也是如此.
If you are using Spring 3.1, you can take advantage of the new produces element on the @RequestMapping annotation to ensure that you produce XML or JSON as you wish, even within the same app.
我在这里写了一篇关于这个的帖子:
I wrote a post about this here:
这篇关于Spring MVC Rest响应JSON和XML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
