1.使用getResourceAsStream读取

ServletContext context = this.getServletContext();

InputStream is = context.getResourceAsStream("/WEB-INF/classes/db.properties");

Properties properties = new Properties();

properties.load(is);

2. 使用getRealPath读取文件

// 获得ServletContext:

ServletContext context = this.getServletContext();

String realPath = context.getRealPath("/WEB-INF/classes/db.properties");

// 获得该文件的磁盘绝对路径.

System.out.println(realPath);

InputStream is = new FileInputStream(realPath);

// 方式1和方式2的区别: 方式1返回的是字节流,方式2返回的是路径

3.类加载器读取文件

InputStream is = ReadFileUtils.class.getClassLoader().getResourceAsStream("db.properties");

Properties properties = new Properties();

properties.load(is);

1.使用getResourceAsStream读取

ServletContext context = this.getServletContext();

InputStream is = context.getResourceAsStream("/WEB-INF/classes/db.properties");

Properties properties = new Properties();

properties.load(is);

2. 使用getRealPath读取文件

// 获得ServletContext:

ServletContext context = this.getServletContext();

String realPath = context.getRealPath("/WEB-INF/classes/db.properties");

// 获得该文件的磁盘绝对路径.

System.out.println(realPath);

InputStream is = new FileInputStream(realPath);

// 方式1和方式2的区别: 方式1返回的是字节流,方式2返回的是路径

3.类加载器读取文件

InputStream is = ReadFileUtils.class.getClassLoader().getResourceAsStream("db.properties");

Properties properties = new Properties();

properties.load(is);