Spring boot面向接口开发，处理跨域问题

import java.io.IOException;

import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

import javax.annotation.Resource;
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.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.data.redis.core.StringRedisTemplate;

import com.fasterxml.jackson.databind.ObjectMapper;

/**
* 修改webservice访问的response header 处理跨域问题 拦截所有访问
* 通过拦截器配置，添加允许跨域的请求头
* @author b_daiyq
*/
@Configuration
@Order(1)
@WebFilter(filterName = "headFilter", urlPatterns = "/*")
public class ChangeResponseHeadFilter implements Filter {

@Resource(name = "redisRealTemplate")
private StringRedisTemplate redisRealTemplate;
private RedisUtil rutil = new RedisUtil();

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

}

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
rutil.setRedisTemplate(redisRealTemplate);

HttpServletResponse resp = (HttpServletResponse) response;
HttpServletRequest rest = (HttpServletRequest) request;
// resp.addHeader("Access-Control-Allow-Origin", "*");
resp.setHeader("Access-Control-Allow-Origin", "*");
resp.setHeader("Access-Control-Allow-Headers", "X-Requested-With, accept, origin, content-type");
resp.setHeader("Content-Type", "*");
resp.setHeader("Access-Control-Allow-Credentials", "true");
}

public void output(String jsonStr,HttpServletResponse response) throws IOException{
response.setContentType("text/html;charset=UTF-8;");
PrintWriter out = response.getWriter();
out.write(jsonStr);
out.flush();
out.close();

}

@Override
public void init(FilterConfig filterConfig) throws ServletException {

}
}