ServletContext獲取全局初始化參數

使用ServletContext讀取全局初始化參數（在/WEB-INF/web.xml目錄下配置參數）

  <context-param>
    <param-name>username</param-name>
    <param-value>root</param-value>
  </context-param>
  <context-param>
    <param-name>password</param-name>
    <param-value>pwd</param-value>
  </context-param>

Servlet中獲取參數；

//使用ServletContext讀取全局初始化參數（在web.xml目錄下配置參數）
String username = this.getServletContext().getInitParameter("username");
String password = this.getServletContext().getInitParameter("password");
System.out.println(username+"   "+password);
		
		
//獲得所有字段，返回一個泛型集合
Enumeration<String> e = this.getServletContext().getInitParameterNames();
    while(e.hasMoreElements()) {
        String name = e.nextElement();
			String value = this.getServletContext().getInitParameter(name);
			System.out.println(name+"   "+value);
		}

控制檯打印結果：