在springboot中注入FilterRegistrationBean不生效的原因
springboot注入FilterRegistrationBean不生效
回顾
最近自定义了两个过滤器,接口请求返回加密和sql注入处理过滤器,因为在封装一些工具包,我在单独调好之后,就打算做成一个注解,像springboot启动类上加@EnableScheduling一样,可以随意控制,当我不想让这俩过滤器生效的时候,那就不加这个注解就可以了。
当然我想到了FilterRegistrationBean的使用方法,注入这两个过滤器。
但是当我写完之后,打成包之后,发现只有sql注入过滤器生效。
原因
原因就是我通过@Bean注解注入FilterRegistrationBean时,没有对它们起别名,造成冲突,只能注入一个。
我的工程里,写了两个下边的方法:
注入加密过滤器
/** * @return 注入加密过滤器 */ @Bean public FilterRegistrationBean filterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(new EncryptionFilter()); registration.addUrlPatterns("/*"); registration.setName("encryptionFilter"); registration.setOrder(1); return registration; }
注入sql注入过滤器
/** * @return 注入加密过滤器 */ @Bean public FilterRegistrationBean filterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(new SqlInjectManagerFilter()); registration.addUrlPatterns("/*"); registration.setName("sqlInjectManagerFilter"); registration.setOrder(2); return registration; }
这个问题虽然简单,但是确实影响到我思路了,我最初一直在考虑是不是我做的springboot启动类加注解触发过滤器注入的方式不对,也是因为我看了下@EnableTransactionManagement的注入方式,我差点就怀疑@Import在打成工具包后不能多个使用的问题。尴尬~~~
当我一比较这俩方法的时候,我才怀疑到名字冲突了。因此就分别对它们加了名称如下:
/** * @return 注入加密过滤器 */ @Bean(name = "encryptionFilter") public FilterRegistrationBean filterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(new EncryptionFilter()); registration.addUrlPatterns("/*"); registration.setName("encryptionFilter"); registration.setOrder(1); return registration; }
/** * @return 注入加密过滤器 */ @Bean(name = "sqlInjectManagerFilter") public FilterRegistrationBean filterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(new SqlInjectManagerFilter()); registration.addUrlPatterns("/*"); registration.setName("sqlInjectManagerFilter"); registration.setOrder(2); return registration; }
springboot @webfilter FilterRegistrationBean「T」
1、@webfilter过滤指定url
在启动类加注解@ServletComponentScan
2、Filter类:
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; @WebFilter(urlPatterns="/task") public class DemoFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { System.out.println("Filter demo task"); chain.doFilter(request, response); } @Override public void destroy() { } }
3、@webfilter过滤全部路径
在filter类上加 @Component 或 @Configuration 注解:
4、FilterRegistrationBean<T> 过滤指定url 或 全部路径
直接在FilterRegistrationBean<T>中配置即可:
import org.apache.catalina.filters.RemoteIpFilter; import org.springframework.boot.web.servlet.FilterRegistrationBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import javax.servlet.*; import javax.servlet.http.HttpServletRequest; import java.io.IOException; @Configuration public class ConfigurationFilter { @Bean public RemoteIpFilter remoteIpFilter() { return new RemoteIpFilter(); } @Bean public FilterRegistrationBean<MyFilter> testFilterRegistration() { FilterRegistrationBean<MyFilter> registration = new FilterRegistrationBean<MyFilter>(); registration.setFilter(new MyFilter());//添加过滤器 registration.addUrlPatterns("/user");//设置过滤路径,/*所有路径 //registration.addInitParameter("name", "alue");//添加默认参数 registration.setName("MyFilter");//设置优先级 registration.setOrder(2);//设置优先级 return registration; } public class MyFilter implements Filter { @Override public void destroy() { } @Override public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) srequest; System.out.println("this is MyFilter,url :" + request.getRequestURI()); filterChain.doFilter(srequest, sresponse); } @Override public void init(FilterConfig arg0) throws ServletException { } } }
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