package helper; import com.yanzuoguang.util.helper.StringHelper; import org.junit.Test; public class TestStringHelper { @Test public void test() { System.out.println(StringHelper.left("100500103", 3)); System.out.println(StringHelper.left("10", 3)); System.out.println(StringHelper.right("100500103", 3)); System.out.println(StringHelper.right("03", 3)); } @Test public void testTrim() { System.out.println(StringHelper.trimLeft("100500103", "1", "0")); System.out.println(StringHelper.trimRight("100500103", "3", "0")); System.out.println(StringHelper.trim("1005050103", "1", "0", "3")); } }