转：springboot servlet使用配置

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springboot servlet使用配置_奔跑的蜗牛的博客-CSDN博客在spring boot中添加自己的Servlet有两种方法，代码注册Servlet和注解自动注册（Filter和Listener也是如此）。一、代码注册通过ServletRegistrationBean 获得控制。也可以通过实现 ServletContextInitializer 接口直接注册。package com.kerry.servlet;import java.ihttps://blog.csdn.net/lr131425/article/details/76269788

在spring boot中添加自己的Servlet有两种方法，代码注册Servlet和注解自动注册（Filter和Listener也是如此）。

【1】手动注册servlet

一、代码注册通过ServletRegistrationBean 获得控制。也可以通过实现 ServletContextInitializer 接口直接注册。

package com.kerry.servlet;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class MyServlet1 extends HttpServlet{private static final long serialVersionUID = 8031133938454140403L;@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {resp.setContentType("text/html");  PrintWriter out = resp.getWriter();  out.println("<html>");  out.println("<head>");  out.println("<title>Hello World</title>");  out.println("</head>");  out.println("<body>");  out.println("<h1>welcome this is my servlet1!!!</h1>");  out.println("</body>");  out.println("</html>"); }}

package com.kerry.configure;import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import com.kerry.servlet.MyServlet;
import com.kerry.servlet.MyServlet1;@Configuration
public class ServletConfigure {/*** 代码注册servlet(不需要@ServletComponentScan注解)* @return*/@Beanpublic ServletRegistrationBean servletRegistrationBean() {return new ServletRegistrationBean(new MyServlet1(), "/servlet/myServlet1");// ServletName默认值为首字母小写，即myServlet1}/*** 多个servlet就注册多个bean* @return*/@Beanpublic ServletRegistrationBean servletRegistrationBean1() {return new ServletRegistrationBean(new MyServlet(), "/servlet/myServlet");// ServletName默认值为首字母小写，即myServlet}}

【2】使用WebServlet 注解

1 Application上加上@ServletComponentScan注解

package com.kerry;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;@SpringBootApplication
@MapperScan("com.kerry.mapper")
@ServletComponentScan
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}

2 servlet上加上@WebServlet注解

package com.kerry.servlet;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** 注解使用servlet 需要在Application上加入 @ServletComponentScan* @author Administrator**/
@WebServlet(name="myServlet",urlPatterns="/servlet/myServlet")
public class MyServlet extends HttpServlet{private static final long serialVersionUID = 8031133938454140403L;@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {resp.setContentType("text/html");  PrintWriter out = resp.getWriter();  out.println("<html>");  out.println("<head>");  out.println("<title>Hello World</title>");  out.println("</head>");  out.println("<body>");  out.println("<h1>welcome this is my servlet!!!</h1>");  out.println("</body>");  out.println("</html>"); }}

3）附上项目结构