1 package cn.itcast;
2
3 import java.io.FileInputStream;
4 import java.io.IOException;
5 import java.io.InputStream;
6 import java.io.PrintWriter;
7 import java.util.Properties;
8
9 import javax.servlet.ServletContext;
10 import javax.servlet.ServletException;
11 import javax.servlet.http.HttpServlet;
12 import javax.servlet.http.HttpServletRequest;
13 import javax.servlet.http.HttpServletResponse;
14
15 //读取资源文件
16 public class ServletDemo1 extends HttpServlet {
17
18
19 public void doGet(HttpServletRequest request, HttpServletResponse response)
20 throws ServletException, IOException {
21
22 test2();
23 }
24
25 //通过servletContext的getReadlPath得到资源的绝对路径后，再通过传统流读取资源文件
26 public void test2() throws IOException {
27
28 String path = this.getServletContext().getRealPath("/WEB-INF/classes/cn/itcast/db.properties");
29 System.out.println(path);
30 String filename = path.substring(path.lastIndexOf("\\")+1);
31 System.out.println("当前读取到资源名称是："+filename);
32
33 FileInputStream in = new FileInputStream(path);
34
35 Properties props = new Properties();
36 props.load(in);
37
38 String url = props.getProperty("url");
39 String username = props.getProperty("username");
40 String password = props.getProperty("password");
41
42 System.out.println(url+username+password);
43 }
44
45
46 public void test1() throws IOException {
47 InputStream in = this.getServletContext().getResourceAsStream("/WEB-INF/classes/cn/itcast/db.properties");
48
49 Properties props = new Properties();
50 props.load(in);
51
52 String url = props.getProperty("url");
53 String username = props.getProperty("username");
54 String password = props.getProperty("password");
55
56 System.out.println(url+username+password);
57 }
58
59
60 public void doPost(HttpServletRequest request, HttpServletResponse response)
61 throws ServletException, IOException {
62
63
64 }
65
66 }