如何在弹簧靴中设置过滤链？
我遇到了spring-boot，并打算为传入请求添加一个filter链。
这是应用程序：
package example.hello; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.ApplicationContext; @SpringBootApplication public class Application { public static void main(String[] args) { ApplicationContext ctx = SpringApplication.run(Application.class, args); } } 这是控制器：
package example.hello; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import java.util.concurrent.atomic.AtomicLong; @RestController public class GreetingController { private static final String template = "Hello, %s!"; private final AtomicLong counter = new AtomicLong(); @RequestMapping("/greeting") public Greeting greeting(@RequestParam(value="name", defaultValue="World") String name) { return new Greeting(counter.incrementAndGet(), String.format(template, name)); } }
这是filter配置：
package example.hello; import org.springframework.boot.context.embedded.FilterRegistrationBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class WebConfig { @Bean public FilterRegistrationBean greetingFilterRegistrationBean() { FilterRegistrationBean registrationBean = new FilterRegistrationBean(); registrationBean.setName("greeting"); GreetingFilter greetingFilter = new GreetingFilter(); registrationBean.setFilter(greetingFilter); registrationBean.setOrder(1); return registrationBean; } @Bean public FilterRegistrationBean helloFilterRegistrationBean() { FilterRegistrationBean registrationBean = new FilterRegistrationBean(); registrationBean.setName("hello"); HelloFilter helloFilter = new HelloFilter(); registrationBean.setFilter(helloFilter); registrationBean.setOrder(2); return registrationBean; } }
这是HelloFilter和问候filter：
package example.hello; import javax.servlet.*; import java.io.IOException; public class HelloFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { System.out.println("HelloFilter!"); } @Override public void destroy() { } } package example.hello; import javax.servlet.*; import java.io.IOException; public class GreetingFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { System.out.println("Greetings from filter!"); } @Override public void destroy() { } }
当我启动应用程序并运行curl localhost:8080/greeting ，仅收到“来自filter的问候语”并且不调用HelloFilter 。
此外， Greeting Controller没有回应。 似乎GreetingFilter阻止了该过程。
那么如何在Spring启动中设置filter链。 上面的代码中是否有任何错误？
在GreetingFilter中添加以下代码行
filterChain.doFilter(servletRequest, servletResponse);
我想更多地澄清一下Gangadhar建议的内容。 您可以尝试添加：
filterChain.doFilter（servletRequest，servletResponse）;
在filter类的doFilter方法中。这将创建filter的链接。