java - 如何使用java获取文本文件两行之间的文本

Question

如何使用 Java 获取文本文件两行之间的文本？我尝试这样做，但它不起作用:

String input = "!!!Error deploying file order\\POST_ORDER_UpdateTaxAmountCurrInCo.sql at 22-JUL-16 08:07:Chathura aBhanakana1!!!Error deploying file order\\POST_ORDER_";
Pattern p = Pattern.compile("(?<=\\b!!!Error deploying file\\b).*?(?=\\b!!!Error deploying file\\b)");
Matcher m = p.matcher(input);
List<String> matches = new ArrayList<String>();
while (m.find()) {
    System.out.println("A " + m.group());
}

Answer 1

更新答案

使用正则表达式

String pattern = "([\\s\\S]*?)(!!!Error deploying file)";

上述模式的解释。

1. *？ - 匹配单个字符零次到无限次
2. \s - 匹配任何空白字符
3. \S - 匹配任何非空白字符

示例代码:

String line = "!!!Error deploying file order\\POST_ORDER_UpdateTaxAmountCurrInCo.sql at 22-JUL-16 08:07:Chathura aBhanakana1!!!Error deploying file order\\POST_ORDER_UpdateTaxAmountChathura aBhanakana1AAAAA !!!Error deploying file order\\POST";

String pattern = "([\\s\\S]*?)(!!!Error deploying file)";

// Create a Pattern object
Pattern r = Pattern.compile(pattern);

// Now create matcher object.
Matcher m = r.matcher(line);
while (m.find( )) {
  String str = m.group(1);
  if(str != null && !str.isEmpty()){
     System.out.println("Found value: " + str );
   }
} 

输出

1. 发现值:order\POST_ORDER_UpdateTaxAmountCurrInCo.sql，位于2016 年 7 月 22 日 08:07:Chathura aBhanakana1
2. 发现值:订单\POST_ORDER_UpdateTaxAmountChathura aBhanakana1AAAAA

Check output here

使用分割方法

示例代码:

String line = "!!!Error deploying file order\\POST_ORDER_UpdateTaxAmountCurrInCo.sql at 22-JUL-16 08:07:Chathura aBhanakana1!!!Error deploying file order\\POST_ORDER_UpdateTaxAmountChathura aBhanakana1AAAAA !!!Error deploying file order\\POST";

for (String retval: line.split("!!!Error deploying file")){
       System.out.println(retval);
 }

输出:

1 ) order\POST_ORDER_UpdateTaxAmountCurrInCo.sql at 22-JUL-16 08:07:Chathura aBhanakana1
2) order\POST_ORDER_UpdateTaxAmountChathura aBhanakana1AAAAA
3) order\POST

Check output here