上传文件至 'src/main/java/com/lh/config'

解决跨域问题

src/main/java/com/lh/config/CORSFilter.java

@@ -0,0 +1,35 @@
+package com.lh.config;
+
+import org.springframework.stereotype.Component;
+
+import javax.servlet.*;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@Component
+public class CORSFilter implements Filter {
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
+            throws IOException, ServletException {
+        HttpServletResponse res = (HttpServletResponse) response;
+        res.addHeader("Access-Control-Allow-Credentials", "true");
+        res.addHeader("Access-Control-Allow-Origin", "*");
+        res.addHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
+        res.addHeader("Access-Control-Allow-Headers", "*");
+        if (((HttpServletRequest) request).getMethod().equals("OPTIONS")) {
+            response.getWriter().println("ok");
+            return;
+        }
+        chain.doFilter(request, response);
+    }
+
+    @Override
+    public void destroy() {
+    }
+
+    @Override
+    public void init(FilterConfig filterConfig) {
+    }
+}