通過新增filter過濾器 徹底解決ajax 跨域問題(Java)
阿新 • • 發佈:2019-01-02
轉自 https://www.cnblogs.com/laoqing/p/7192473.html?utm_source=itdadao&utm_medium=referral
1、在web.xml新增filter
<filter>
<filter-name>contextfilter</filter-name>
<filter-class>com.cf.hr.filter.WebContextFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>contextfilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
2、filter實現
123456789101112131415161718192021222324252627282930313233343536 | 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; public class WebContextFilter implements Filter { @Override public void destroy() { // TODO Auto-generated method stub } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletResponse httpServletResponse = (HttpServletResponse) response; httpServletResponse.setHeader( "Access-Control-Allow-Origin" , "*" ); httpServletResponse.setHeader( "Access-Control-Allow-Headers" , "accept,content-type" ); httpServletResponse.setHeader( "Access-Control-Allow-Methods" , "OPTIONS,GET,POST,DELETE,PUT" ); chain.doFilter(request, httpServletResponse); } @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } } |