過濾器（Filter）的注冊方法和 Servlet 一樣，有兩種方式：代碼注冊或者注解注冊
1.代碼注冊方式
通過代碼方式注入過濾器
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@Bean public FilterRegistrationBean indexFilterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(new IndexFilter()); registration.addUrlPatterns("/"); return registration; } |
IndexFilter.Java類：
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package com.example.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;public class IndexFilter implements Filter{ @Override public void destroy() { System.out.println("filter destroy method"); } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { System.out.println("filter doFilter method"); } @Override public void init(FilterConfig arg0) throws ServletException { System.out.println("filter init method"); }} |
2.注解方式
通過注解方式注入過濾器
IndexFilter2.java類
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package com.example.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;@WebFilter(urlPatterns = "/*", filterName = "indexFilter2")public class IndexFilter2 implements Filter{ @Override public void destroy() { System.out.println("filter2 destroy method"); } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { System.out.println("filter2 doFilter method"); } @Override public void init(FilterConfig arg0) throws ServletException { System.out.println("filter2 init method"); }} |
把注解加到入口處啟動即可
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@SpringBootApplication@ServletComponentScanpublic class SpringBootSimpleApplication { public static void main(String[] args) { SpringApplication.run(SpringBootSimpleApplication.class, args); }} |
以上所述是小編給大家介紹的Spring Boot的filter（過濾器）簡單使用，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對服務器之家網站的支持！
原文鏈接：http://www.cnblogs.com/web424/p/6755957.html
