Spring Boot的filter（过滤器）简单使用实例详解
过滤器（Filter）的注册方法和Servlet一样，有两种方式：代码注册或者注解注册
1.代码注册方式
通过代码方式注入过滤器
@Bean
publicFilterRegistrationBeanindexFilterRegistration(){
FilterRegistrationBeanregistration=newFilterRegistrationBean(newIndexFilter());
registration.addUrlPatterns("/");
returnregistration;
}
IndexFilter.Java类：
packagecom.example.filter;
importjava.io.IOException;
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
publicclassIndexFilterimplementsFilter{
@Override
publicvoiddestroy(){
System.out.println("filterdestroymethod");
}
@Override
publicvoiddoFilter(ServletRequestarg0,ServletResponsearg1,FilterChainarg2)
throwsIOException,ServletException{
System.out.println("filterdoFiltermethod");
}
@Override
publicvoidinit(FilterConfigarg0)throwsServletException{
System.out.println("filterinitmethod");
}
}
2.注解方式
通过注解方式注入过滤器
IndexFilter2.java类
packagecom.example.filter;
importjava.io.IOException;
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
importjavax.servlet.annotation.WebFilter;
@WebFilter(urlPatterns="/*",filterName="indexFilter2")
publicclassIndexFilter2implementsFilter{
@Override
publicvoiddestroy(){
System.out.println("filter2destroymethod");
}
@Override
publicvoiddoFilter(ServletRequestarg0,ServletResponsearg1,FilterChainarg2)
throwsIOException,ServletException{
System.out.println("filter2doFiltermethod");
}
@Override
publicvoidinit(FilterConfigarg0)throwsServletException{
System.out.println("filter2initmethod");
}
}
把注解加到入口处启动即可
@SpringBootApplication
@ServletComponentScan
publicclassSpringBootSimpleApplication{
publicstaticvoidmain(String[]args){
SpringApplication.run(SpringBootSimpleApplication.class,args);
}
}
以上所述是小编给大家介绍的SpringBoot的filter（过滤器）简单使用，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！