Java String字符串分割方法split()+Stream使用

深碍√TFBOYSˉ_ 2023-10-08 18:48 48阅读 0赞

### **一、split方法源码：** ###

![c916a72f9e424be597fbf8a4b68095ce.png][]

### 二、split方法的使用 ###

####  **(1)按普通字符分割：** ####

String str = "my-back-your";
            String[] ss = str.split("-");
            Arrays.stream(ss).forEach(System.out::println);

![0cf809e4fd13422e9c133b5f79716620.png][]

#### **（2）按转义(特殊)字符分割：\\\\** ####

>     1.字符" $ " ," | " , " * " , " + "等都得加上转义字符，前面加上"\\"。
>      2.如果是" \ "，那么就得写成"\\\\"

String str2 = "you+i+h+his+we";
            String[] ss2 = str2.split("\\+");
            Stream.of(ss2).forEach(System.out::println);

#### **(3)按多个字符分割：用"|"作为连字符** ####

String str3 = "水瓶座#双鱼座&白羊座$金牛座";
            String[] ss3 = str3.split("#|&|\\$");
            Stream.of(ss3).forEach(System.out::println);

![79d94d4570e14da6a9aafb5cdd94b806.png][]

#### (4)按正则表达式分割 ####

**(1) java中使用正则表达式匹配预定义字符类**

![159fdece895941ec915e4290e0f34108.png][]

**(2) java中使用正则表达式匹配POSIX字符类**

![33f4b5ca35f04d178a3c97a5b2ea958f.png][]

![b87ad590dbad4275a4102f2e9824f43a.png][]

java中有一个快速的单词关键分割代码（按符号分割）："[\\p{Punct}\\s]+"
            String str4 = "美人计 空城计,反间计。 How did you weekend?";
            String[] ss4 = str4.split("[\\p{Punct}\\s]+");
            Stream.of(ss4).forEach(System.out::println);

![5c49b172245941d880c6bf902edbd64f.png][]

[c916a72f9e424be597fbf8a4b68095ce.png]: https://img-blog.csdnimg.cn/c916a72f9e424be597fbf8a4b68095ce.png
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[159fdece895941ec915e4290e0f34108.png]: https://img-blog.csdnimg.cn/159fdece895941ec915e4290e0f34108.png
[33f4b5ca35f04d178a3c97a5b2ea958f.png]: https://img-blog.csdnimg.cn/33f4b5ca35f04d178a3c97a5b2ea958f.png
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[5c49b172245941d880c6bf902edbd64f.png]: https://img-blog.csdnimg.cn/5c49b172245941d880c6bf902edbd64f.png