Java 嵌入式Tomcat开发

我叫农

2704人浏览 · 2018-12-12 15:34:57

我叫农 · 2018-12-12 15:34:57 发布

https://ke.qq.com/course/260513

pom.xml

<dependency>
      <groupId>org.apache.tomcat.embed</groupId>
      <artifactId>tomcat-embed-core</artifactId>
      <version>8.5.35</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tomcat.embed</groupId>
      <artifactId>tomcat-embed-jasper</artifactId>
      <version>8.5.35</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tomcat.embed</groupId>
      <artifactId>tomcat-embed-el</artifactId>
      <version>8.5.35</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tomcat.embed</groupId>
      <artifactId>tomcat-embed-websocket</artifactId>
      <version>8.5.35</version>
    </dependency>

编写java代码：

package com.yuanian;


import org.apache.catalina.core.StandardContext;
import org.apache.catalina.startup.Tomcat;

public class App {
    public static final int PORT = 8080;
    public static final String CONTEXT_PATH = "/demo1";
    public static final String WEBAPP = "src/main/webapp/";
    public static final String SERVLET_NAME = "indexServlet";

    public static void main(String[] args) throws Exception {
        Tomcat tomcat = new Tomcat();
        tomcat.setPort(PORT);
        tomcat.getHost().setAutoDeploy(false);
        //创建上下文
        StandardContext context = new StandardContext();
        context.setPath(CONTEXT_PATH);
        context.addLifecycleListener(new Tomcat.FixContextListener());
        tomcat.getHost().addChild(context);

        //创建Servlet
        tomcat.addServlet(CONTEXT_PATH,SERVLET_NAME,new IndexServlet());
        //servlet映射
        context.addServletMappingDecoded("/index",SERVLET_NAME);
        tomcat.start();
        //异步接受请求
        System.out.println("start success!");
        tomcat.getServer().await();
    }
}

新建一个IndexServlet：

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author mbh
 * @date 2018/12/12 15:02
 */
public class IndexServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setCharacterEncoding("UTF-8");
        resp.setContentType("text/html;charset=UTF-8");
        resp.getWriter().print("Hello World!");
    }
}