后端增加配置类解决跨域问题

 1，第一种方式   过滤器

package com.skynet.wechat.wechat.common;

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;

import com.skynet.util.StringUtil;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.skynet.wechat.api.common.SysConfig;
import com.skynet.wechat.api.model.UserModel;
import com.skynet.wechat.wechat.service.IServiceReqLogService;
/**
 * 
 * <p>Title: </p>
 * <p>Description: 公共过滤器,处理跨域和日志记录</p>
 *
 * @author Torlay
 * @version 1.00.00
 * <pre>
 * 修改记录:
 * 版本号    修改人        修改日期       修改内容
 * 
*
 */


@Service("commonFilter")
public class CommonFilter implements Filter{
   protected transient Logger logger = Logger.getLogger(this.getClass().getName());

   @Autowired
   private IServiceReqLogService serviceReqLogService;
   
   @Override
   public void destroy() {
      // TODO Auto-generated method stub
      
   }

   @Override
   public void doFilter(ServletRequest request, ServletResponse response,
         FilterChain chain) throws IOException, ServletException {
      try {
         //增加跨域处理
         HttpServletResponse resp = (HttpServletResponse) response;
         resp.setHeader("Access-Control-Allow-Origin", "*");
         //拦截请求日志
         HttpServletRequest req = (HttpServletRequest) request;
         logger.debug("11111>>>>========拦截请求日志=============>>>>>>>>"+request);
         if(req != null ){
            /*请求日志记录*/
            serviceReqLogService.outTransactioninsert(req);
         }
      } catch (Exception e) {
         e.printStackTrace();
      }finally{
         chain.doFilter(request, response);
      }
      
   }

   @Override
   public void init(FilterConfig arg0) throws ServletException {
      // TODO Auto-generated method stub
      
   }

}

 2，第二种方式

@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("*")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }

}

 3. 过滤器配置

public class CrossDomainFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO Auto-generated method stub

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {
        
        String jsonCallback = ((HttpServletRequest) req).getParameter("jsonpCallback");
        if (jsonCallback != null) {
            HttpServletResponse response = (HttpServletResponse) res;
            OutputStream os = response.getOutputStream();
            os.write((jsonCallback + "(").getBytes());
            chain.doFilter(req, res);
            os.write(")".getBytes());
        } else {
            chain.doFilter(req, res);
        }
        
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

}