循循渐进02篇 maven Properties 读取资源文件

Posted 2020-11-22 huhao2000

Properties

<!--在pom build中配置resources,来防止我们资源导出失败的问题-->
  <build>
    <resources>
      <resource>
        <directory>src/main/resouces</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>true</filtering>
      </resource>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>true</filtering>
      </resource>
    </resources>
  </build>

　　1.在java目录下properties

　　2.在resources目录下新建properties

发现：都被打包到了同一个路径下：classes 我们俗称这个路径为classpath

思路：需要一个文件流：

   properties：

uersname=asdas
password=1asdasd

class：

public class Servletdome01 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        InputStream is = this.getServletContext().getResourceAsStream("/WEB-INF/classes/com/hao/selever02/aa.properties");
        Properties properties = new Properties();
        properties.load(is);
        String uersname = properties.getProperty("uersname");
        String password = properties.getProperty("password");
        resp.getWriter().print(uersname+password);


    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       doPost(req, resp);
    }
}