JavaWeb项目解决跨域请求配置

首先需要一个filter，代码如下：

package com.ckugua.mentality.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class SimpleCORSFilter implements Filter {
private boolean isCross = false;

@Override
public void destroy() {
isCross = false;
}

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (isCross) {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
HttpServletResponse httpServletResponse = (HttpServletResponse) response;
System.out.println("拦截请求: " + httpServletRequest.getServletPath());
httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
httpServletResponse.setHeader("Access-Control-Max-Age", "0");
httpServletResponse.setHeader("Access-Control-Allow-Headers",
"Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");
httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");
httpServletResponse.setHeader("XDomainRequestAllowed", "1");
}
chain.doFilter(request, response);
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {
String isCrossStr = filterConfig.getInitParameter("IsCross");
isCross = isCrossStr.equals("true") ? true : false;
System.out.println(isCrossStr);
}

}

然后spring-mvc.xml配置

<!-- 接口跨域配置 -->
<mvc:cors>
<mvc:mapping path="/**"
allowed-origins="*"
allowed-methods="POST, GET, OPTIONS, DELETE, PUT"
allowed-headers="Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With"
allow-credentials="true" />
</mvc:cors>

web.xml配置

<!-- 跨域请求 -->
<filter>
<filter-name>SimpleCORSFilter</filter-name>
<filter-class>com.ckugua.mentality.filter.SimpleCORSFilter</filter-class>
<init-param>
<param-name>IsCross</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>SimpleCORSFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

原文地址：https://www.cnblogs.com/qinxiaowan/p/9660518.html