Question

我正在尝试从Java属性文件中获取2D数组数据并将这些数据存储到HashMap对象中。让我感到困惑的是Eclipse只从2D数组中检索了一些数据。

以下是代码：

Properties config = new Properties();
config.load(new FileInputStream("categories.properties"));
String[][] categories = fetchArrayFromPropFile("content", config);
HashMap<String,Integer> hashmap = new HashMap<String,Integer>();
for (String[] mapping : categories)
{
  hashmap.put(mapping[0], 0);
}

private static String[][] fetchArrayFromPropFile(String propertyName, Properties propFile) {
  String[] a = propFile.getProperty(propertyName).split(";");
  String[][] array = new String[a.length][a.length];
  for(int i = 0;i < a.length;i++) {
    array[i] = a[i].split(",");
  }
  return array;
}

在categories.properties文件中：

content=Advertising,0;Agriculture,0;Art,0;Automotive,0;Aviation,0;Banking,0;Beverages,0;Biotechnology,0;Business,0;Crime,0;Disasters,0;Economics,0;Education,0;Elections,0;Fashion,0;Food,0;Hardware,0;Health,0;Hotels,0;Intellectual Property,0;Investing,0;Labor,0;
Law,0;Marriage,0;Mobile Devices,0;Politics,0;Real Estate,0;Renewable Energy,0;Robotics,0;Science,0;Social Media,0;Software and Internet,0;Space,0;Sports,0;Technology,0;Traditional Energy,0;Travel,0;Video Games,0;War,0;Weather,0;Entertainment,0;No Topic,0; Business_Finance,0;Disaster_Accident,0;Entertainment_Culture,0;Environment,0;Health_Medical_Pharma,0;Hospitality_Recreation,0;Human  Interest,0;Law_Crime,0;Religion_Belief,0;Technology_Internet,0;War_Conflict,0;Other,0;

Answer 1

我想你想要：

String[][] array = new String[a.length][2];

Answer 2

这是因为您的属性文件格式为

content=XXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

你看，它被分成两行代表一个属性。因此，在阅读您的内容属性时，它只读取第一行，并且不包含所有数据。

如果是这样，请将您的属性文件连接成一行，如下所示。

content=Advertising,0;Agriculture,0;Art,0;Automotive,0;Aviation,0;Banking,0;Beverages,0;Biotechnology,0;Business,0;Crime,0;Disasters,0;Economics,0;Education,0;Elections,0;Fashion,0;Food,0;Hardware,0;Health,0;Hotels,0;Intellectual Property,0;Investing,0;Labor,0;Law,0;Marriage,0;Mobile Devices,0;Politics,0;Real Estate,0;Renewable Energy,0;Robotics,0;Science,0;Social Media,0;Software and Internet,0;Space,0;Sports,0;Technology,0;Traditional Energy,0;Travel,0;Video Games,0;War,0;Weather,0;Entertainment,0;No Topic,0; Business_Finance,0;Disaster_Accident,0;Entertainment_Culture,0;Environment,0;Health_Medical_Pharma,0;Hospitality_Recreation,0;Human  Interest,0;Law_Crime,0;Religion_Belief,0;Technology_Internet,0;War_Conflict,0;Other,0;

如果是这样，您的代码工作正常并且所有数据都被读取。

Answer 3

使用“\”连接一个属性的diffident行。

例如：

  a=b \
    c

无法从Java属性文件中检索所有2D数组数据

3 个答案: