Question

我遇到以下代码的问题

public static void main(String[] args) throws FileNotFoundException, IOException {

    Scanner br = new Scanner(new FileReader("/home/esunmes/NetBeansProjects/random/src/random/something.config"));
    HashMap map = new HashMap();
    String line;
    String temp2;
    while (br.hasNextLine()) {
        line = br.next();
        Scanner scan = new Scanner(new FileReader("/home/esunmes/NetBeansProjects/random/src/random/inifile.config"));
        while (scan.hasNextLine()) {
            temp2 = (String) scan.next();
            if (temp2.equals(line)) {
                Scanner scn = new Scanner(temp2);
                String string;
                while (scn.hasNextLine() && ((string = scn.next()) != "\n")) {
                    String[] temp3 = string.split("//=");
                    if (temp3.length > 1) {
                        String key = temp3[0];
                        String value = temp3[1];
                        map.put(key, value);// TODO code application logic here
                    }
                }
            }
        }
    }
    Set set = map.entrySet();
    Iterator iter = set.iterator();
    while (iter.hasNext()) {
        Map.Entry maps = (Map.Entry) iter.next();
        String key = (String) maps.getKey();
        String value = (String) maps.getValue();
        System.out.println("key:" + key + " value" + value);
    }
}

这两个配置文件是 1.inifile.config

 section1
 key1=1
 key2=2

 section2
 key4=4
 key5=5

 section3
 key6=6
 key3=3

 section4
 key7=7

 section5
 key8=8

 section6
 key9=9

 section7
 key10=10

 section8
 key11=11

2.something.config

 section1
 section2
 section3
 section4
 section8

第一个配置文件包含样本日志，第二个配置文件包含要提取的部分的名称

地图应包含键值对，但它们不包含并且这些地图都是空的。有人请花点时间来分析这个......真的很重要

Answer 1

您的代码中存在几个问题：

扫描仪scn =新扫描仪（temp2）;

您可以简单地使用已创建的扫描，为什么要从String创建新扫描程序？

string.split（ “// =”）

它应该是string.split("=")，您不需要为"="转义，即使它需要转义，也应该是\\而不是//。

hasNext()应该跟next()，hasNextLine()后跟nextLine()，你不应该使用hasNextLine()然后使用next()。

所以代码应该是

Scanner br = new Scanner(new FileReader("file2"));
HashMap map = new HashMap();
String line;
String temp2;
while (br.hasNextLine()) {
    line = br.nextLine();
    Scanner scan = new Scanner(new FileReader("file1"));
    while (scan.hasNextLine()) {
        temp2 = (String) scan.nextLine();
        if (temp2.equals(line)) {
            //Scanner scn = new Scanner(temp2);
            String string;
            while (scan.hasNext() && ((string = scan.next()) != "\n")) {
                String[] temp3 = string.split("=");
                if (temp3.length > 1) {
                    String key = temp3[0];
                    String value = temp3[1];
                    map.put(key, value);// TODO code application logic
                                        // here
                }
            }
        }
    }
}
Set set = map.entrySet();
Iterator iter = set.iterator();
while (iter.hasNext()) {
    Map.Entry maps = (Map.Entry) iter.next();
    String key = (String) maps.getKey();
    String value = (String) maps.getValue();
    System.out.println("key:" + key + " value" + value);
}

解析ini文件并使用scanner类将值存储在hashmap中

1 个答案: