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 {@Overridepublic void destroy() {// TODO Auto-generated method stub}@Overridepublic 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);}@Overridepublic void init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stub}} |