opencc4j

<dependency>
    <groupId>com.github.houbb</groupId>
    <artifactId>opencc4j</artifactId>
    <version>1.7.2</version>
</dependency>

String original = "生命不息，奮鬥不止";
String result = ZhConverterUtil.toSimple(original);
Assert.assertEquals("生命不息，奋斗不止", result);

String original = "生命不息，奋斗不止";
String result = ZhConverterUtil.toTraditional(original);
Assert.assertEquals("生命不息，奮鬥不止", result);