OSGI嵌入jetty应用服务器

1、搭建osgi基础环境，参考：https://www.cnblogs.com/dyh004/p/10642383.html

2、引入jetty相关的依赖包

修改jetty启动端口

3、com.kszsa.osgi.hello这个bundle中，引入相关的依赖

4、准备静态页面

jetty.html内容如下

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jetty说明</title>
</head>
<body>
<h2>这是jetty使用说明</h2>
<font color="green">//用来注册诸如表态页面等等</font><br>
registerResources(String alias, String name, HttpContext context) <br><br>

<font color="green">//用来注册servlet类</font><br>
registerServlet(String alias, Servlet servlet, Dictionary initparams, HttpContext context)
</body>
</html>

5、注册静态资源，修改Activator.java

package com.kszsa.osgi.hello;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.service.http.HttpContext;
import org.osgi.service.http.HttpService;

public class Activator implements BundleActivator {

    private static BundleContext context;
    private HttpService service;

    static BundleContext getContext() {
        return context;
    }

    /**
     * 启动bundle
     */
    public void start(BundleContext bundleContext) throws Exception {
        Activator.context = bundleContext;
        ServiceReference serviceReference = bundleContext
                .getServiceReference(HttpService.class.getName());
        service = (HttpService) bundleContext.getService(serviceReference);

        // 注册
        HttpContext httpContext = service.createDefaultHttpContext();
        
        // 用来注册诸如表态页面等等
        // 设置别名，所有对"/osgi"映射到"web"目录
        service.registerResources("/osgi", "/webpage", httpContext);
        
    }

    /**
     * 停止bundle
     */
    public void stop(BundleContext bundleContext) throws Exception {

        service.unregister("/osgi");

        Activator.context = null;
    }

}

6、启动osgi项目，查看结果，访问http://127.0.0.1:8090/osgi/jetty.html

说明静态资源访问成功。

7、注册servlet资源，新建servlet

package com.kszsa.osgi.servlet;

import java.io.BufferedWriter;  
import java.io.IOException;  
import java.io.OutputStreamWriter;  
  
import javax.servlet.ServletException;  
import javax.servlet.http.HttpServlet;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
  
import org.osgi.framework.BundleContext;  
  
public class PrintNameServlet extends HttpServlet{  
      
    private static final long serialVersionUID = -9080875068147052401L;  
      
    private BundleContext context;  
      
    public PrintNameServlet(BundleContext context) {  
        super();  
        this.context = context;  
    }  
  
    @Override  
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)  
            throws ServletException, IOException {  
        doGet(req, resp);  
    }  
      
    @Override  
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)  
            throws ServletException, IOException {  
          
        resp.setCharacterEncoding("UTF-8");  
          
        String name = req.getParameter("name");  
        System.out.println(name);  
          
        String s = "Hello，world！";  
        StringBuilder sb = new StringBuilder();  
        sb.append("<html><title>Response</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />");  
        sb.append("<body>");  
        sb.append(s);  
        sb.append("</body></html>");  
          
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(resp.getOutputStream(),"UTF-8"));  
        bw.write(sb.toString());  
        bw.flush();  
        bw.close();  
    }  
  
}

8、修改修改Activator.java，注册servlet

package com.kszsa.osgi.hello;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.service.http.HttpContext;
import org.osgi.service.http.HttpService;

import com.kszsa.osgi.servlet.PrintNameServlet;

public class Activator implements BundleActivator {

    private static BundleContext context;
    private HttpService service;

    static BundleContext getContext() {
        return context;
    }

    /**
     * 启动bundle
     */
    public void start(BundleContext bundleContext) throws Exception {
        Activator.context = bundleContext;
        ServiceReference serviceReference = bundleContext
                .getServiceReference(HttpService.class.getName());
        service = (HttpService) bundleContext.getService(serviceReference);

        // 注册
        HttpContext httpContext = service.createDefaultHttpContext();

        // 用来注册诸如表态页面等等
        // 设置别名，所有对"/osgi"映射到"web"目录
        service.registerResources("/osgi", "/webpage", httpContext);
        
        // 注册servlet
        // 设置servlet别名，'/osgi/print"映射到servlet的实现
        service.registerServlet("/osgi/print", new PrintNameServlet(
                bundleContext), null, httpContext);

    }

    /**
     * 停止bundle
     */
    public void stop(BundleContext bundleContext) throws Exception {

        service.unregister("/osgi");

        Activator.context = null;
    }

}

9、重启osgi，访问http://127.0.0.1:8090/osgi/print

参考地址：https://liugang594.iteye.com/blog/1328050

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原文地址：https://www.cnblogs.com/dyh004/p/10642407.html