正则表达式对字符串的常见操作_切割

其实使用的就是String类中的split方法。

public class Test {
    public static void main(String[] args) {
        functionDemo();
    }

    public static void functionDemo() {
        String str = "zhangsan xiao zhaoliu";
        String[] names = str.split(" ");//用空格来切时候，如果有很多空格，切出来的效果就不好了
        for(String name : names){
            System.out.println(name);
        }
    }
}

public class Test {
    public static void main(String[] args) {
        functionDemo();
    }

    public static void functionDemo() {
        String str = "zhangsan       xiaoqiang          zhaoliu";
        
        String[] names = str.split(" +");//表示多个空格
        
        for(String name : names){
            System.out.println(name);
        }
    }
}

public class Test {
    public static void main(String[] args) {
        functionDemo();
    }

    public static void functionDemo() {
        
        String str = "zhangsan.xiaoqiang.zhaoliu";
        
        String[] names = str.split("\.");
        
        for(String name : names){
            System.out.println(name);
        }
    }
}

 组：((A)(B(C)))

public class Test {
    public static void main(String[] args) {
        functionDemo();
    }

    public static void functionDemo() {
        String str = "zhangsanttttxiaoqiangmmmmmmzhaoliu";
        
        String[] names = str.split("(.)\1+");//加上括号进行封装，有编号
        
        for(String name : names){
            System.out.println(name);
        }
    }
}