这篇文章主要介绍了SpringBoot拦截器Filter的使用方法详解,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
前言：
最新Servlet 3.0拦截器的使用
1.pom.xml添加需要使用的依赖
4.0.0top.ythengspringboot-demo0.0.1jarorg.springframework.bootspring-boot-starter-parent2.0.5.RELEASEUTF-8UTF-81.8org.springframework.bootspring-boot-starter-weborg.springframework.bootspring-boot-starter-testtestorg.springframework.bootspring-boot-starter-thymeleaforg.springframework.bootspring-boot-devtoolstruetruemyspringbootorg.springframework.bootspring-boot-maven-pluginmaven-compiler-plugin1.81.8
package top.ytheng.demo.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.annotation.WebFilter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; //Servlet3.0特性 //urlPatterns:拦截的URL地址 //filterName:拦截器名称 @WebFilter(urlPatterns="/api/*", filterName="loginFilter") public class LoginFilter implements Filter{ /* * 容器加载完成调用 * */ @Override public void init(FilterConfig filterConfig) throws servletexception { // Todo Auto-generated method stub System.out.println("filter init..."); } /* * 请求被拦截的时候调用 * */ @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, servletexception { // Todo Auto-generated method stub System.out.println("doFilter..."); HttpServletRequest req = (HttpServletRequest)request; HttpServletResponse resp = (HttpServletResponse)response; String username = req.getParameter("username"); if(username.equals("theng")) { chain.doFilter(request, response); } else { //重定向 resp.sendRedirect("/filter.html"); return; } } /* * 容器被销毁的时候调用 * */ @Override public void destroy() { // Todo Auto-generated method stub System.out.println("filter destroy..."); } }
3.添加测试控制器
package top.ytheng.demo.controller; import java.util.HashMap; import java.util.Map; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/api/v1/filter") public class FilterController { @RequestMapping("/test") public Object testFilter() { Map map = new HashMap(); map.put("name", "theng"); map.put("pwd", "123456"); return map; } }
4.添加启动类
package top.ytheng.demo; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; @SpringBootApplication //等于下面3个 //@SpringBootConfiguration //@EnableAutoConfiguration //@ComponentScan //拦截器用到 @ServletComponentScan public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } }
Insert title here
hello theng
filter success
6.右键项目Run As启动项目，测试地址
http://localhost:8080/api/v1/filter/test?username=theng http://localhost:8080/api/v1/filter/test?username=ytheng
另附：
