要求：
代码中配置的url路径为http://127.0.0.1/api/associates/queryAssociatesInfo
现在要求http://127.0.0.1/associates/queryAssociatesInfo也可以同样访问同一个conroller下面的method,并且要求参数全部跟随
代码：
package com.shitou.huishi.framework.filter; 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 javax.servlet.http.HttpServletResponseWrapper; /**
* 修改请求路由，当进入url为/a/b时，将其url修改为/api/a/b
* Created by qhong on 2018/5/16 13:27
**/
public class UrlFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
} @Override
public void destroy() {
} @Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest)request;
HttpServletResponseWrapper httpResponse = new HttpServletResponseWrapper((HttpServletResponse) response);
System.out.println(httpRequest.getRequestURI());
String path=httpRequest.getRequestURI();
if(path.indexOf("/api/")<){
path="/api"+path;
System.out.println(path);
httpRequest.getRequestDispatcher(path).forward(request,response);
}
else {
chain.doFilter(request,response); }
return;
}
}
这个类必须继承Filter类，这个是Servlet的规范。有了过滤器类以后，以前的web项目可以在web.xml中进行配置，但是spring boot项目并没有web.xml这个文件，那怎么配置？在Spring boot中，我们需要FilterRegistrationBean来完成配置。
其实现过程如下：
package com.shitou.huishi.framework.filter; import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration; /**
* Created by qhong on 2018/5/16 15:28
**/
@Configuration
public class FilterConfig { @Bean
public FilterRegistrationBean registFilter() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new UrlFilter());
registration.addUrlPatterns("/*");
registration.setName("UrlFilter");
registration.setOrder();
return registration;
} }