博客

String[] split(xx)

根据给定的正则表达式的匹配来拆分此字符串。形成一个新的String数组。

可按照字符及空格拆分

@Test
	public void test1(){
		String str = "Hello World java";
		String[] all = str.split(" ");
		for (int i = 0; i < all.length; i++) {
			System.out.println(all[i]);
		}
	}

也可以按照正则表达式拆分

@Test
	public void test2(){
		String str = "1Hello2World3java4aaaa";
		str = str.replaceFirst("\\d", "");
		System.out.println(str);
		String[] all = str.split("\\d");
		for (int i = 0; i < all.length; i++) {
			System.out.println(all[i]);
		}
	}

@Test
	public void test3(){
		String str = "1Hello2World3java4aaaa5";
		str = str.replaceAll("^\\d|\\d$", "");
		String[] all = str.split("\\d");
		for (int i = 0; i < all.length; i++) {
			System.out.println(all[i]);
		}
	}

可以运用于给定数据拆分，然后进行类的包装

class Student{
	private String name;
	private int age;
	public Student(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
	public Student() {
		super();
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	@Override
	public String toString() {
		return "Student [name=" + name + ", age=" + age + "]";
	}
	
}

@Test
	public void test4(){
		String str = "张三.23|李四.24|王五.25";
		//|在正则中是有特殊意义，我这里要把它当做普通的|
		String[] all = str.split("\\|");
		
		//转成一个一个学生对象
		Student[] students = new Student[all.length];
		for (int i = 0; i < students.length; i++) {
			//.在正则中是特殊意义，我这里想要表示普通的.
			String[] strings = all[i].split("\\.");//张三,  23
			String name = strings[0];
			int age = Integer.parseInt(strings[1]);
			students[i] = new Student(name,age);
		}
		
		for (int i = 0; i < students.length; i++) {
			System.out.println(students[i]);
		}
		
	}

结果