在web应用中Servlet的应用比较多,最开始的web应用就是全部以servlet来实现的,后来出现了Struts、Struts2,到今天应用非常广泛的SpringMvc,这些web mvc框架比原来的servlet功能更加强大,开发效率而更高,但是实际上这些框架底层都是servlet在做支撑。今天我们学习如何在SpringBoot添加Servlet的应用。
一.编写Servlet继承HttpServlet
package com.maxbill.core.webbox.servlet;
import org.apache.log4j.Logger;
import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException;
/** * @功能 自定义servlet * @作者 zuoshuai(MaxBill) * @日期 2017/7/6 * @时间 14:57 * @备注 MyServlet */ public class MyServlet extends HttpServlet {
Logger log = Logger.getLogger(MyServlet.class);
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { log.info("servlet通过get方式请求完成..."); }
}
这里只实现了doGet请求,post、put等请求同理实现即可。
二.注册servlet到启动类
package com.maxbill;
import com.maxbill.core.webbox.servlet.MyServlet; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean;
@SpringBootApplication public class MaxbillApplication {
/\*\*
\* 注册Servlet
\*/
@Bean
public ServletRegistrationBean MyServlet1(){
return new ServletRegistrationBean(new MyServlet(),"/servlet/\*");
}
public static void main(String\[\] args) {
SpringApplication.run(MaxbillApplication.class, args);
}
}
三.使用注解注册servlet
首先在servlet上增加@WebServlet
@WebServlet(urlPatterns = "/servlet/*", description = "") public class MyServlet extends HttpServlet {
Logger log = Logger.getLogger(MyServlet.class);
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
log.info("servlet通过get方式请求完成...");
}
}
然后在启动类中增加@ServletComponentScan,使项目中的servlet能够被扫描到
package com.maxbill;
import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan;
@ServletComponentScan @SpringBootApplication public class MaxbillApplication {
public static void main(String\[\] args) {
SpringApplication.run(MaxbillApplication.class, args);
}
}
启动项目测试:访问http://127.0.0.1:520/servlet
控制台日志:INFO com.maxbill.core.webbox.servlet.MyServlet:25 - servlet通过get方式请求完成...