跨域核心代码

package com.agx.ims.interceptor;

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.HttpServletResponse;
import org.springframework.stereotype.Component;
/**
 * 
 * 设置跨域请求
 *
 */
@Component
public class responseFilter implements Filter {
  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    HttpServletResponse response = (HttpServletResponse) res;
    response.setHeader("Access-Control-Allow-Origin", "*");//设置允许跨域的域名，*代表所有都可跨域访问
    response.setHeader("Access-Control-Allow-Methods", "*");//支持提交的方法// 多个拼接成串"POST, GET, OPTIONS, DELETE"
   // response.setHeader("Access-Control-Max-Age", "3600");
   // response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
    response.setHeader("Access-Control-Allow-Credentials", "true");
   
    chain.doFilter(req, res);
  }
  public void init(FilterConfig filterConfig) {}
  public void destroy() {}
}

 
	
 
  		
  
   cors
  
  		
  
   com.agx.ims.interceptor.responseFilter
  
	
 
	
 
  		
  
   cors
  
  		
  
   /*
  
	
 
	
	
 
	
 
		
  
   encodingFilter
  
		
  
   org.springframework.web.filter.CharacterEncodingFilter
  
		
   
   
    encoding
    
   
    UTF-8
    
  
		
   
   
    forceEncoding
    
   
    true
    
  
	
 
	
 
		
  
   encodingFilter
  
		
  
   /*
  
	
 

1. 新建一个web项目A，
2. 新建一个web项目B，
3. 在A项目的前端页面中利用ajax请求项目B的一个接口
4. 两个项目在各自的tomcat容器跑起来