Java 正则表达式匹配

Question

通过变量 /department_file/123/
使用正则表达式匹配把
/department_file/123/
/department_file/123/234/
/department_file/123/123/
替换成
/department_file/222/
/department_file/222/234/
/department_file/222/123/

Answer 1

String reg="/department_file/123/";
String string="/department_file/123//department_file/123/234//department_file/123/123/ ";
Pattern pattern=Pattern.compile(reg);
Matcher matcher=pattern.matcher(string);
String result=null;
while(matcher.find()){
result=string.replace(reg,"/department_file/222/");
}
System.out.println(result);
大概代码

Answer 2

String tmp = "/department_file/123/,/department_file/123/123,/department_file/123/234,/department_file/123/345";
System.out.println(tmp.replaceAll("/department_file/123", "/department_file/222"));