Question

public String readvaluesFromFile(String PassingAnameString) {
    File myfile = new File("src/main/resources/file.txt");
    FileInputStream myFileInput = new FileInputStream(errorFile);
    Properties properties = new Properties();
    properties.load(myFileInput);
    myFileInput.close();
    Enumeration<Object> filenameKeys = properties.keys();
    while (filenameKeys.hasMoreElements()) {
        String fileValues = properties.getProperty(PassingAnameString);
        return "Reference Name: " + filenameKeys + " : " + fileValues;
    }
    return "There was a problem.";
}

我有一个函数将一串名称传递给一个函数从文本文件中返回这些名称的相应值。

例如。文本文件包含：name = value name = value name = value

函数1将一个“name，name”字符串传递给函数2，该函数读取文件。我无法弄清楚如何让文件读取多个名称并返回相应的值。有什么输入吗？

上面的功能2

Answer 1

接受可变数量的字符串并返回相等数量的字符串值。试试这个：

public String[] readvaluesFromFile(String... PassingManyStrings) {
    File myfile = new File("src/main/resources/file.txt");
    FileInputStream myFileInput = new FileInputStream(errorFile);
    Properties properties = new Properties();
    properties.load(myFileInput);
    myFileInput.close();

    String[] toReturn = new String[ PassingManyStrings.length ];
    int i=0;
    for(String oneProp: PassingManyStrings){
        toReturn[i++] = properties.getProperty(oneProp);
        if( toReturn[i++] == null)
              toReturn[i++] = "There was a problem.";
        else
              toReturn[i++] = "Reference Name: " + oneProp + " : " + toReturn[i++];
    }
    return toReturn;
}

从名称对为

1 个答案: