关于springmvc的跨域问题

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废话不多说直接上代码

1.首先是一个过滤器:

import java.net.URL;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

public class AccessKeyInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

String referer = request.getHeader("Referer");
URL u = new URL(referer);
String host = u.getHost().toLowerCase();
response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
response.setHeader("Access-Control-Allow-Origin", "*");
return true;
}

}

2.配置过滤器,拦截的接口

<mvc:interceptor>
<mvc:mapping path="/user/getUserCount"/>
<bean class="com.hiifire.filter.AccessKeyInterceptor"></bean>
</mvc:interceptor>

3.由于Spring默认Controller是不处理OPTIONS的请求的，所以必须在web.xml中打开,如下：

<servlet>
<servlet-name>mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>dispatchOptionsRequest</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

4.js进行访问

$(function(){
$.post("http://192.168.6.84/user/getUserCount",function(data,status){
alert(JSON.stringify(data));
},'json');
})

搞定

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