Java利用cors实现跨域请求实例

<!-- https://mvnrepository.com/artifact/com.thetransactioncompany/cors-filter -->
<dependency>
  <groupId>com.thetransactioncompany</groupId>
  <artifactId>cors-filter</artifactId>
  <version>2.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.thetransactioncompany/java-property-utils -->
<dependency>
  <groupId>com.thetransactioncompany</groupId>
  <artifactId>java-property-utils</artifactId>
  <version>1.10</version>
</dependency>

<filter>     
  <filter-name>CORS</filter-name> 
  <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class> 
  <init-param> 
   <param-name>cors.allowOrigin</param-name> 
    <param-value>*</param-value> 
  </init-param> 
  <init-param> 
   <param-name>cors.supportedMethods</param-name> 
    <param-value>GET, POST, HEAD, PUT, DELETE</param-value> 
  </init-param> 
  <init-param> 
   <param-name>cors.supportedHeaders</param-name> 
    <param-value>Accept, Origin, X-Requested-With, Content-Type, Last-Modified</param-value> 
  </init-param> 
  <init-param> 
    <param-name>cors.exposedHeaders</param-name> 
    <param-value>Set-Cookie</param-value> 
  </init-param> 
  <init-param> 
    <param-name>cors.supportsCredentials</param-name> 
    <param-value>true</param-value> 
  </init-param>
</filter> 
 
<filter-mapping> 
  <filter-name>CORS</filter-name> 
  <url-pattern>/*</url-pattern> 
</filter-mapping>

$.ajax("url", {
  type: "POST",
  xhrFields: {
    withCredentials: true,
    useDefaultXhrHeader: false
  },
  data: {
    type: "test"
  },
  dataType: 'json',
  crossDomain: true,
  success: function(data, status, xhr) {
   console.log(data);
  }
});