java Ajax跨域

第一步:如果项目用了Maven构建的,请添加如下依赖到pom.xml中

<dependency>

    <groupId>com.thetransactioncompany</groupId>

    <artifactId>cors-filter</artifactId>

    <version>[ version ]</version>

</dependency>

第二步:添加CORS配置到项目的Web.xml中

请注意,以下配置文件请放到web.xml的前面,作为第一个filter存在

 <!-- 跨域配置-->
  <filter>
    <!-- The CORS filter with parameters -->
    <filter-name>CORS</filter-name>
    <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>

    <init-param>
      <param-name>cors.allowGenericHttpRequests</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>cors.allowOrigin</param-name>
      <param-value>*</param-value>
    </init-param>
    <init-param>
      <param-name>cors.allowSubdomains</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>cors.supportedMethods</param-name>
      <param-value>GET, HEAD, POST, OPTIONS</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>
      <!--这里可以添加一些自己的暴露Headers   -->
      <param-value>X-Test-1, X-Test-2</param-value>
    </init-param>
    <init-param>
      <param-name>cors.supportsCredentials</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>cors.maxAge</param-name>
      <param-value>3600</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <!-- CORS Filter mapping -->
    <filter-name>CORS</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

【转】Ajax 跨域，这应该是最全的解决方案了

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