String字串中獲取所有匹配結果的索引值

摘要： String字串中獲取所有匹配結果的索引值 例如現在我們有這樣一段程式碼 public interface ActErrorHisMapper { public List<ActError> getPage(Map<String, Object&...

String字串中獲取所有匹配結果的索引值

例如現在我們有這樣一段程式碼

public interface ActErrorHisMapper {

public List<ActError> getPage(Map<String, Object> params);

public List<ActError> getList(Map<String, Object> params);

public int getCount(Map<String, Object> params);
}

我們要查詢所有的public 關鍵字出現的索引，那麼可以這麼寫

public static List<Integer> findAllIndex(String string,int index,String findStr){
List<Integer> list =new ArrayList<>();
if (index != -1){
int num = string.indexOf(findStr,index);
list.add(num);
//遞迴進行查詢
List myList = findAllIndex(string,string.indexOf(findStr,num+1),findStr);
list.addAll(myList);
}
return list;
}

這樣呼叫即可

public static void main(String[] args) {
String string = "public interface ActErrorHisMapper {\n" + "\n"
+ "public List<ActError> getPage(Map<String, Object> params);\n" + "\n"
+ "public List<ActError> getList(Map<String, Object> params);\n" + "\n"
+ "public int getCount(Map<String, Object> params);\n" + "}";
List<Integer> num = findAllIndex(string,0,"public");
for (Integer integer : num){
System.out.println(integer);
}
}

輸出結果如下：