A solution to cross domain problems

Learning today angular When , In order to test post Request , When writing interface , newspaper 403, An online search is a cross domain error
see network The interface in header Of Request Method The type is options
PS.angular Yes post Requested packaging options, And first send a request to confirm the survival status of the server , Then go again. Post Request .

1. add to filter class
package cn.murong.web.aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.Order;

import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import javax.servlet.annotation.WebFilter;

@Order(1) // The order of slice loading ,1 Represents the first load
@WebFilter(filterName =“AccessControlAllowOrigin”,urlPatterns = {"*"})
public class AccessControlAllowOriginFilter implements Filter {
public static final Logger log = LoggerFactory.getLogger(AccessControlAllowOriginFilter.class);

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,ServletException{
    HttpServletResponse response = (HttpServletResponse)res;
    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE, PATCH");
    response.setHeader("Access-Control-Max-Age", "3600");
    response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    response.setHeader("Access-Control-Expose-Headers", "Location");
    chain.doFilter(req, response);
}
public void init (FilterConfig filterConfig){
}
public void destroy(){
}

}
2. In starting the class Add scan
@MapperScan(“cn.murong.persistence.mapper”)
@ServletComponentScan(basePackages = “cn.murong.web.aspect”)// Add scanned filter Of java package
@SpringBootApplication
public class TimeManageApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(TimeManageApplication.class, args);
ContextUtils.setApplicationContext(context);
}
}