ServletContext读取属性文件

itcast.properties

Company = itcast
Address = Beijing

public class TestServlet06 extends HttpServlet {

	private static final long serialVersionUID = -9049704689750672203L;

	
	public void doGet(HttpServletRequest request, 
	    HttpServletResponse response)throws ServletException, IOException {
		ServletContext context = this.getServletContext();
			PrintWriter out = response.getWriter();
			//获取相对路径中的输入流对象，第一个“/”代表web应用的根目录，
			//整个路径表示文件相对于web应用的相对路径，
			//src下的资源文件在tomcat启动时被复制到项目的WEB-INF/classes目录下
			InputStream in = context
				.getResourceAsStream("/WEB-INF/classes/itcast.properties");
			Properties pros = new Properties();
			pros.load(in);
			out.println("Company=" + pros.getProperty("Company") + "
");
			out.println("Address=" + pros.getProperty("Address") + "
");
	}
}

http://localhost:8080/chapter03/TestServlet06

public void doGet(HttpServletRequest request, HttpServletResponse response)
                 throws ServletException, IOException {
	PrintWriter out = response.getWriter();                                                                       
	ServletContext context = this.getServletContext();                                                            
	// 获取文件绝对路径                                                                                                   
	String path = context.getRealPath("/WEB-INF/classes/itcast.properties");                                      
	FileInputStream in = new FileInputStream(path);                                                               
	Properties pros = new Properties();                                                                           
	pros.load(in); 
        out.println(path);                                                                                               
	out.println("Company=" + pros.getProperty("Company") + "
");                                               
	out.println("Address=" + pros.getProperty("Address") + "
");                                               
}