基于Maven的web项目，跨域访问

最新推荐文章于 2021-12-16 12:49:04 发布

原创最新推荐文章于 2021-12-16 12:49:04 发布 · 652 阅读

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#跨域

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本文详细介绍了如何在基于Maven的web项目中处理跨域请求。首先，你需要导入必要的依赖，然后配置web.xml以允许跨域。接着，创建一个DataController类，通过@Controller注解和@RequestMapping注解来定义处理跨域请求的方法。最后，展示了一个使用jQuery的AJAX调用来测试跨域功能的前端代码示例。

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1、导包

<dependency>
  <groupId>com.thetransactioncompany</groupId>
  <artifactId>java-property-utils</artifactId>
  <version>1.9.1</version>
</dependency>
<dependency>
  <groupId>com.google.code.gson</groupId>
  <artifactId>gson</artifactId>
  <version>2.6.2</version>
</dependency>
<dependency>
  <groupId>com.thetransactioncompany</groupId>
  <artifactId>cors-filter</artifactId>
  <version>2.5</version>
</dependency>

2、配置web.xml

<filter>
  <description>跨域过滤器</description>
  <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>

3、创建用于提供跨域的类

@Controller
public class DataController {

    @RequestMapping("/getData")
    public void getDataForGet(HttpServletRequest request, HttpServletResponse response)throws IOException {

        response.getWriter().print("{123：456}");
    }
}

4、前台调用代码