import java.util.regex.Matcher; import java.util.regex.Pattern;public class TestRegex{ public static void main(String[] args){ String s = "123123123";//"/jg4c/ls/learch";
//方法1 Pattern p = Pattern.compile("^(/jg(?:4c){0,1}).*");
Matcher m = p.matcher(s); if(m.matches()){ System.out.println(m.group(1)); }else{ System.out.println("no found"); }
//方法2 s = s.replaceAll("^(/jg(?:4c){0,1}).*", "$1"); System.out.println(s); } }
晕,发错了... 你的要求是 对/A/B/C的情况只要/A是吧? import java.util.regex.Matcher; import java.util.regex.Pattern;public class TestRegex{ public static void main(String[] args){ String s = "/jg4c/ls/learch";
//方法1 Pattern p = Pattern.compile("^(/jg[^/]{0,1}).*");
Matcher m = p.matcher(s); if(m.matches()){ System.out.println(m.group(1)); }else{ System.out.println("no found"); }
//方法2 s = s.replaceAll("^(/jg(?:4c){0,1}).*", "$1"); System.out.println(s); } }
import java.util.regex.Pattern;public class Test { /**
* @param args
*/
public static void main(String[] args) {
System.out.println(getString("/jg4dfsdfg/fjdslk/gjdlskf/fjsl"));
}
public static String getString(String str){
Pattern pt = Pattern.compile("/jg[\\w]*");
Matcher matcher = pt.matcher(str);
boolean flag = matcher.find();
if(flag){
String str1 = matcher.group();
return str1;
}else{
return "";
}
}
}
import java.util.regex.Pattern;public class Test { public static void main(String[] args) {
System.out.println(getString("/jg4dfsdfg/fjdslk/gjdlskf/fjsl"));//测试
}
/**
* 根据传进的字符串提取自己想要的字符
* @param str 提取的目标字符串
* @return 返回取出的字符串,如果没有则返回空
*/
public static String getString(String str) {
Pattern pt = Pattern.compile("/jg[\\w]*");//正则表达式控制取出的字符
Matcher matcher = pt.matcher(str);
boolean flag = matcher.find();
if (flag) {
String str1 = matcher.group();
return str1;
} else {
return "";
}
}
}
import java.util.regex.Matcher;
import java.util.regex.Pattern;public class TestRegex{
public static void main(String[] args){ String s = "123123123";//"/jg4c/ls/learch";
//方法1
Pattern p = Pattern.compile("^(/jg(?:4c){0,1}).*");
Matcher m = p.matcher(s);
if(m.matches()){
System.out.println(m.group(1));
}else{
System.out.println("no found");
}
//方法2
s = s.replaceAll("^(/jg(?:4c){0,1}).*", "$1");
System.out.println(s);
}
}
你的要求是
对/A/B/C的情况只要/A是吧?
import java.util.regex.Matcher;
import java.util.regex.Pattern;public class TestRegex{
public static void main(String[] args){ String s = "/jg4c/ls/learch";
//方法1
Pattern p = Pattern.compile("^(/jg[^/]{0,1}).*");
Matcher m = p.matcher(s);
if(m.matches()){
System.out.println(m.group(1));
}else{
System.out.println("no found");
}
//方法2
s = s.replaceAll("^(/jg(?:4c){0,1}).*", "$1");
System.out.println(s);
}
}