有关用AJAX发送json数据到后台的问题总结

标准的发送AJAX到后台的写法如下，这里用jquery来实现的

var xml_data = [{"name":"scene_img_3773_panorama","sceneAttr":{"view":{"hlookat":"1.008","vlookat":"-4.579"},"hotspots":[{"ath":"-4.124","atv":"4.146","linkedscene":"scene_img_7994_panorama","name":"spot1"},{"ath":"-4.124","atv":"8.146","name":"spot2"}]}},{"name":"scene_img_7994_panorama","secenAttr":{"view":{"hlookat":"-3.296","vlookat":"2.283"},"hotspots":[{"ath":"-19.613","atv":"11.459","linkedscene":"scene_img_7984_panorama","name":"spot1"},{"ath":"-75.014","atv":"8.862","linkedscene":"scene_img_3773_panorama","name":"spot2"}]}}];

$.ajax({
type:"POST",
url:"/panorama/saveScene",
processData: false,
contentType: "application/json;charset=utf-8", //这个是发送信息至服务器时内容编码类型
dataType: "json",
data:JSON.stringify(xml_data),//这里必须将对象转成string类型，否则将掉入无线的大坑中。。。
success:function(msg){
alert(msg);
}
})

后台采用的是spring mvc来接收的，后台接收的方式也分为了两种，一种是用@RequestBody来处理的，一种是用common io的工具类IOUtils来读取二进制流将其解析成一个字符串，之后再用fastjson来将一个Json字符串转成java对象

@Controller
@RequestMapping("/panorama")
public class PanoController extends BaseController {
/**
* 用@RequestBody的方式来将json反序列化成list<Scene>对象
* @param scene
* @return
*/
@RequestMapping(value = "saveScene",method = RequestMethod.POST)
@ResponseBody
public List<Scene> saveScene(@RequestBody List<Scene> scene){
System.out.println("JSONTOJAVAOBJ==================="+scene.size());
return scene;
}
//io流读取二进制json对象
public List<Scene> saveScene(HttpServletRequest request) throws IOException{
String jsonStr = IOUtils.toString(request.getInputStream(),"UTF-8");
System.out.println("JSONTOJAVAOBJ============"+JSON.parseObject(jsonStr,new TypeReference<List<Scene>>(){}));
return null;
}
}

另外将spring.xml部分对json的配置分享出供大家来查阅，spring对json的配置交给了fastjson来处理，配置如下

<mvc:annotation-driven>
<!-- 编码转换 -->
<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
<!-- 将spring的json处理交给fastjson -->
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<property name="supportedMediaTypes" value="application/json;charset=UTF-8"/>
<property name="features">
<list>
<value>WriteMapNullValue</value>
<value>QuoteFieldNames</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>

有问题请留言。