解決No 'Access-Control-Allow-Origin' header is present on the requested resource.跨域問題

解決方法 通過服務端設置返回參數

1.在后臺寫一個過濾器過濾器來改寫請求頭，直接給出代碼

public class CusFilter implements Filter {

//...

@Override

public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

HttpServletResponse response = (HttpServletResponse) servletResponse;

HttpServletRequest request = (HttpServletRequest)servletRequest;

String origin = request.getHeader("Origin");

response.setHeader("Access-Control-Allow-Origin", origin);

response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");

response.setHeader("Access-Control-Max-Age", "3600");

response.setHeader("Access-Control-Allow-Headers", "x-requested-with,Authorization");

response.setHeader("Access-Control-Allow-Credentials", "true");

String method = request.getMethod();

if(method.equalsIgnoreCase("OPTIONS")){

servletResponse.getOutputStream().write("Success".getBytes("utf-8"));

}else{

filterChain.doFilter(servletRequest, servletResponse);

}

}

}

2.在web.xml修改過濾器配置

總結

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