SpringMVC 跨域请求

方法1:采用过滤器

package cn.mwee.wpos.report.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 跨域请求处理
 */
public class CrossOriginFilter implements Filter{
    private boolean isCross = false;

    @Override
    public void destroy() {
        isCross = false;
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        if(isCross){
            HttpServletRequest httpServletRequest = (HttpServletRequest)request;
            HttpServletResponse httpServletResponse = (HttpServletResponse)response;
            System.out.println("拦截请求: "+httpServletRequest.getServletPath());
            httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");  
            httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");  
            httpServletResponse.setHeader("Access-Control-Max-Age", "0");  
            httpServletResponse.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");  
            httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");  
            httpServletResponse.setHeader("XDomainRequestAllowed","1");  
        }
        chain.doFilter(request, response);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        String isCrossStr = filterConfig.getInitParameter("IsCross");
        isCross = isCrossStr.equals("true")?true:false;
        System.out.println(isCrossStr);
    }

}

然后在web.xml中设置

 <!--跨域请求设置-->
  <filter>
        <filter-name>CrossOriginFilter</filter-name>
        <filter-class>cn.mwee.wpos.report.filter.CrossOriginFilter/filter-class>
        <init-param>
            <param-name>IsCross</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CrossOriginFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

方法2:采用springmvc 的跨域设置

  <!-- API 接口跨域配置 -->
    <mvc:cors>
        <mvc:mapping path="/**"
                     allowed-origins="*"
                     allowed-methods="POST, GET, OPTIONS, DELETE, PUT"
                     allowed-headers="Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With"
                     allow-credentials="true" />
    </mvc:cors>

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