java icu4j 全角半角转换

International Component for Unicode for Java （ICU4J)
这个库提供了各种处理Unicode和国际化的工具

添加依赖

<!-- https://mvnrepository.com/artifact/com.ibm.icu/icu4j -->
<dependency>
    <groupId>com.ibm.icu</groupId>
    <artifactId>icu4j</artifactId>
    <version>72.1</version>
</dependency>

处理全角半角转换

import com.ibm.icu.text.Transliterator;

// 全角转半角
Transliterator fToHTransliterator = Transliterator.getInstance("Fullwidth-Halfwidth");
System.out.println(fToHTransliterator.transliterate("ＡＢＣ"));
// 半角转全角
Transliterator hToFTransliterator = Transliterator.getInstance("Halfwidth-Fullwidth");
System.out.println(hToFTransliterator.transliterate("ABC"));