问题描述
我的文字很长,我正在提取一些特定的值,然后是一些特定的单词。这是我的长文本示例:
.........
FPS(FramesPerSecond)[ValMin: 29.0000,ValMax: 35.000]
.........
TotalFrames[ValMin: 100000,ValMax:200000]
.........
MemoryUsage(In MB)[ValMin:190000MB,ValMax:360000MB]
.........
这是我的代码:
File file = filePath.toFile();
JSONObject jsonObject = new JSONObject();
String FPSMin="";
String FPSMax="";
String TotalFramesMin="";
String TotalFramesMax="";
String MemUsageMin="";
String MemUsageMax="";
String log = "my//log//file";
final Matcher matcher = Pattern.compile("FPS/\(FramesPerSecond/\)/\[ValMin:");
if(matcher.find()){
FPSMin= matcher.end().trim();
}
但是我无法使其工作。我哪里错了?基本上,我需要为每个字符串选择来自该长文本的相应值(最大值和最小值),并将其存储到变量中。喜欢
FPSMin = 29.0000
FPSMax = 35.0000
FramesMin = 100000
Etc
谢谢
编辑: 我尝试了以下代码(在一个测试用例中)以查看该解决方案是否可行,但由于无法打印除对象之外的任何内容,因此遇到了问题。这是代码:
@Test
public void whenReadLargeFileJava7_thenCorrect()
throws IOException,URISyntaxException {
Scanner txtScan = new Scanner("path//to//file//test.txt");
String[] FPSMin= new String[0];
String FPSMax= "";
//Read File Line By Line
while (txtScan.hasNextLine()) {
// Print the content on the console
String str = txtScan.nextLine();
Pattern FPSMin= Pattern.compile("^FPS\\(FramesPerSecond\\)\\[ValMin:");
Matcher matcher = FPSMin.matcher(str);
if(matcher.find()){
String MinMaxFPS= str.substring(matcher.end(),str.length()-1);
String[] splitted = MinMaxFPS.split(",");
FPSMin= splitted[0].split(": ");
FPSMax = splitted[1];
}
System.out.println(FPSMin);
System.out.println(FPSMax);
}
解决方法
也许您的模式应该像这样^FPS\\(FramesPerSecond\\)\\[ValMin:
。我已经尝试过了,并且对我有用。
String line = "FPS(FramesPerSecond)[ValMin: 29.0000,ValMax: 35.000]";
Pattern pattern = Pattern.compile("^FPS\\(FramesPerSecond\\)\\[ValMin:");
Matcher matcher = pattern.matcher(line);
if (matcher.find()) {
System.out.println(line.substring(matcher.end(),line.length()-1));
}
}
通过这种方式,您可以获取要提取数据的行的偏移量,并使用子字符串函数可以获取从offset开始直到第1行大小为止的所有字符(因为您不想同时获取]字符)
,以下正则表达式将匹配并捕获名称min和max:
Pattern.compile("(.*)\\[.+:\\s*(\\d+(?:\\.\\d+)?)[A-Z]*,.+:\\s*(\\d+(?:\\.\\d+)?)[A-Z]*\\]");
用法(提取捕获的组):
String input = (".........\n" +
"FPS(FramesPerSecond)[ValMin: 29.0000,ValMax: 35.000]\n" +
".........\n" +
"TotalFrames[ValMin: 100000,ValMax:200000]\n" +
".........\n" +
"MemoryUsage(In MB)[ValMin:190000MB,ValMax:360000MB]\n" +
".........");
for (String s : input.split("\n")) {
Matcher matcher = pattern.matcher(s);
if (matcher.matches()) {
System.out.println(matcher.group(1) + "," + matcher.group(2) + "," + matcher.group(3));
}
}
输出:
FPS(每秒帧数),29.0000,35.000
TotalFrames,100000,200000
MemoryUsage(In MB),190000,360000