标签：protect initial ali nts etc types 这一 web.xml writer
创建一个接口：
package my.web; public interface SpringWeb { void config(); }
实现类：
package my; import my.web.SpringWeb; public class SpringInit implements SpringWeb { @Override public void config() { System.out.println("大家好"); } }
import my.web.SpringWeb; public class SpringWeblnitializer implements SpringWeb { @Override public void config() { System.out.println("你好，哈皮！"); } }
创建：MyWebConfig 等同于web.xml
package my.web; import javax.servlet.ServletContainerInitializer; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.annotation.HandlesTypes; import java.util.Set; // 等同于web.xml文件 @HandlesTypes({SpringWeb.class}) public class MyWebConfig implements ServletContainerInitializer { @Override public void onStartup(Set<Class<?>> set, ServletContext servletContext) throws ServletException { System.out.println("hello wrold"); for (Class<?> aclass : set) { SpringWeb o = null; try{ o = (SpringWeb) aclass.newInstance(); o.config(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InstantiationException e) { e.printStackTrace(); } } } }
创建一个servlet 继承于 HttpServlet
package my.web;
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;
import java.io.PrintWriter;
@WebServlet("/aaa")
public class MyServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html;charset=utf-8");
PrintWriter writer = resp.getWriter();
writer.write("。。。。。");
}
}
在src下创建 META-INF 包
其次在创建一个 services 的包 添加一个filed的文件
//加上这一句 目的项目在初始化自动找到web.xml文件
my.web.MyWebConfig
结果：
源码地址：https://github.com/nongzihong/servlet_new
标签：protect initial ali nts etc types 这一 web.xml writer
原文地址：https://www.cnblogs.com/nongzihong/p/10166470.html
