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SpringBoot自定義過濾器filter

主要有兩種方式:

一、第一種

步驟:(1)先建立自定義filter

  DefaultFilter 為本人建立的自定義過濾器。

public class DefaultFilter implements Filter{
	
	private Logger logger = LoggerFactory.getLogger(DefaultFilter.class);
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		
		logger.info("Default filter!!!");
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

}

(2)  將自定義過濾器新增到容器中

@Configuration
public class FilterConfig {

	/**
	 * 新增自定義 filter
	 * 
	 */
	@Bean
	public FilterRegistrationBean<Filter> defaultFilter(){
		FilterRegistrationBean<Filter> registerFilter = new FilterRegistrationBean<Filter>();
		registerFilter.setFilter(new DefaultFilter()); //新增自定義過濾器
		registerFilter.addUrlPatterns("/*"); //新增過濾規則
		registerFilter.setName("DefaultFilterOne");
		registerFilter.addInitParameter("key", "value");
		registerFilter.setOrder(1);
		
		return registerFilter;
	}
}

二、第二種

           步驟(1):建立自定義過濾器,並在自定義過濾器新增 @WebFilter 註解,並且配置相關引數, @Order(1)表示執行順序,值越小,越先執行

/*
 * @Order(1)表示執行順序,值越小,越先執行
 * urlPatterns 為過濾規則
 * filterName 過濾器名稱
 * WebFilter 還有其他引數,可自行設定
 */
@Order(1)
@WebFilter(filterName="secondfilter",urlPatterns="/*")
public class SecondFilter implements Filter {

	private Logger logger = LoggerFactory.getLogger(SecondFilter.class);
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		
		logger.info("SecondFilter!!!");
		chain.doFilter(request, response);

	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

}

(2)在啟動類添加註解 @ServletComponentScan

@SpringBootApplication(scanBasePackages="com.test")
@ServletComponentScan
public class MongoOperateApplication {

	public static void main(String[] args) {
		SpringApplication.run(MongoOperateApplication.class, args);
	}
	
}

完成,進行測試