springboot中使用servlet通过配置类

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在servlet目录下创建个servlet类，示例代码如下：

package com.bjpowernode.springboot.servlet;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;public class HeServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.getWriter().write("he springboot servlet");
resp.getWriter().flush();
resp.getWriter().close(); } @Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req,resp);
}
}

编写配置类：

package com.bjpowernode.springboot.config;import com.bjpowernode.springboot.servlet.HeServlet;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import javax.servlet.ServletRegistration;@Configuration
public class ServletConfig { @Bean
public ServletRegistrationBean heServletRegisterBen() {
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(
new HeServlet(), "/servlet/heservlet"
);
return servletRegistrationBean;
}
}

注意需要加的两个注解：@Configuration 还有@Bean

然后就可以启动springboot项目访问地址：http://localhost:8080/servlet/heservlet

进行测试了。