Cors实现java后端完全跨域实例
作者：lifereader
本篇文章主要介绍了Cors实现java后端完全跨域实例，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
https://www.jb51.net/article/114838.htm这篇文章很详细的介绍了JS的跨域，给出的解决方案是springboot的方式，假如不用spring boot 或者 spring版本低于4.2就需要自己实现；
参考了spring boot的实现方式，并有所简化，代码如下：
package com.lvluo.web.filter.CorsFilter;
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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpHeaders;
public class CorsFilter implements Filter {
public static final String ACCESS_CONTROL_REQUEST_METHOD = "Access-Control-Request-Method";
public static final String OPTIONS = "OPTIONS";
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;
if (isCorsRequest(httpRequest)) {
httpResponse.setHeader("Access-Control-Allow-Origin", "*");
httpResponse.setHeader("Access-Control-Allow-Methods",
"POST, GET, PUT, DELETE");
httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
// response.setIntHeader("Access-Control-Max-Age", 1728000);
httpResponse
.setHeader(
"Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept, Accept-Encoding, Authorization");
if (isPreFlightRequest(httpRequest)) {
return;
}
}
chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig) {
}
public void destroy() {
}
public boolean isCorsRequest(HttpServletRequest request) {
return (request.getHeader(HttpHeaders.ORIGIN) != null);
}
/**
* Returns {@code true} if the request is a valid CORS pre-flight one.
*/
public boolean isPreFlightRequest(HttpServletRequest request) {
return (isCorsRequest(request) && OPTIONS.equals(request.getMethod()) && request
.getHeader(ACCESS_CONTROL_REQUEST_METHOD) != null);
}
}
接着在web.xml配置filter即可
<filter> <filter-name>corsFilter</filter-name> <filter-class>com.lvluo.web.filter.CorsFilter</filter-class> </filter> <filter-mapping> <filter-name>corsFilter</filter-name> <url-pattern>/api/*</url-pattern> </filter-mapping>
前端测试的JS代码，其中客户端的
$.ajax({
headers : {
'Authorization' :'Bearer iBoxSO9QdrHR0'
},
url: 'http://localhost:8080/service/api/ping',
type: 'GET',
dataType: 'json',
success : function(result){
$("#result").html(result.code);
}
})
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。