tomcat嵌入式

tomcat嵌入式

Tomcat7开始支持嵌入式功能，增加了一个启动类org.apache.catalina.startup.Tomcat

先来看个例子

示例

示例一：映射servlet

public static void main(String[] args) throws LifecycleException {
    Tomcat tomcat = new Tomcat();
    Context context = tomcat.addContext("/test",null);
    Tomcat.addServlet(context, "helloServlet", new HttpServlet() {
        @Override
        public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
            res.getWriter().write("Hello World!!!");
        }
    });
    context.addServletMappingDecoded("/hello","helloServlet");
    tomcat.init();
    tomcat.start();
    // 阻塞主程序结束
    tomcat.getServer().await();
}

访问127.0.0.1:8080/test/hello即可

调用start方法启动Tomcat

public void start() throws LifecycleException {
    getServer();
    getConnector();
    server.start();
}

还可以调用addWebapp来添加web应用

在调用start之前先调用addWebapp来添加一个web应用

public Context addWebapp(String contextPath, String docBase) throws ServletException {
    return addWebapp(getHost(), contextPath, docBase);
}

public Context addWebapp(Host host, String contextPath, String docBase,
            LifecycleListener config) {

        silence(host, contextPath);
            // 创建一个StandardContext
        Context ctx = createContext(host, contextPath);
  // 设置访问路径和应用实际的物理路径
        ctx.setPath(contextPath);
        ctx.setDocBase(docBase);
        ctx.addLifecycleListener(getDefaultWebXmlListener());
        ctx.setConfigFile(getWebappConfigFile(docBase, contextPath));

        ctx.addLifecycleListener(config);

        if (config instanceof ContextConfig) {
            // prevent it from looking ( if it finds one - it'll have dup error )
            ((ContextConfig) config).setDefaultWebXml(noDefaultWebXmlPath());
        }

        if (host == null) {
            getHost().addChild(ctx);
        } else {
            host.addChild(ctx);
        }

        return ctx;
    }