Question

我尝试加载属性文件，如下所示

public class A_Main {

private static FileReader reader = new FileReader("D:\\Selenium_Workspace\\SeleniumTEST\\lists.properties");

private static Properties properties = new Properties();
private static properties.load(reader);

public static String UserName = properties.getProperty("lists.user");
public static String Passwd = properties.getProperty("lists.password");
......
......
......
public static void main(String[] args) throws IOException {

    Configuration_Report conf = new Configuration_Report();
    try {
        conf.conf_report(UserName, Passwd);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
......
......
......

但是，在eclipse中，它在下面的代码中标记了一个错误，

private static properties.load(reader);

我也尝试将所有内容更改为公共静态，但似乎无法加载属性文件，因为 reader 似乎无法识别。

Answer 1

这不是在类成员上调用函数的有效语法。您可以使用static初始化块。并且FileReader构造函数也可以抛出Exception。您可以将初始化移动到同一个块中。像，

private static FileReader reader;
private static Properties properties = new Properties();
static {
    try {
        reader = new FileReader("D:\\Selenium_Workspace\\SeleniumTEST\\lists.properties");
        properties.load(reader);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Answer 2

如上面的Elliott所共享，您需要从静态块调用load函数。如果从静态块中调用它，则必须注意在静态块中初始化用户名和密码（以及任何其他依赖项）。或者另一种选择是在主函数的开头初始化它们：

静态阻止：

public class A_Main {

private static Properties properties = new Properties();

public static String UserName = null;
public static String Passwd = null;

static{
     try (FileReader reader = new FileReader("D:\\Selenium_Workspace\\SeleniumTEST\\lists.properties"))
     {
         properties.load(reader);
         UserName = properties.getProperty("lists.user");
         Passwd = properties.getProperty("lists.password");
     } catch (IOException e) {
         e.printStackTrace();
     }

}
......
......
......
public static void main(String[] args) throws IOException {

    Configuration_Report conf = new Configuration_Report();
    try {
        conf.conf_report(UserName, Passwd);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
......
......
......

内部主要功能：

public class A_Main {

private static Properties properties = new Properties();
public static String UserName = null;
public static String Passwd = null;

......
......
......
public static void main(String[] args) throws IOException {
     try (FileReader reader = new FileReader("D:\\Selenium_Workspace\\SeleniumTEST\\lists.properties"))
   {
         properties.load(reader);
         UserName = properties.getProperty("lists.user");
         Passwd = properties.getProperty("lists.password");
         Configuration_Report conf = new Configuration_Report();
         conf.conf_report(UserName, Passwd);
    } catch (IOException | InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
......
......
......

无法在java中加载属性文件

2 个答案: