<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>21.0</version>
</dependency>

   @Test
    public void test() {
        System.out.println(CaseFormat.LOWER_HYPHEN.to(CaseFormat.LOWER_CAMEL, "test-data"));//testData
        System.out.println(CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL, "test_data"));//testData
        System.out.println(CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, "test_data"));//TestData
 
        System.out.println(CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, "testdata"));//testdata
        System.out.println(CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, "TestData"));//test_data
        System.out.println(CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_HYPHEN, "testData"));//test-data
        

        String orderColumn = "orderColumn";
        //输入是LOWER_CAMEL，输出是LOWER_UNDERSCORE
        orderColumn = CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, orderColumn);
        System.out.println(orderColumn);//order_column

        orderColumn = "orderColumn";
        //输入是LOWER_CAMEL，输出是UPPER_CAMEL
        orderColumn = CaseFormat.LOWER_CAMEL.to(CaseFormat.UPPER_CAMEL,orderColumn);
        System.out.println(orderColumn);//OrderColumn

        orderColumn = "order_column";
        //输入是LOWER_UNDERSCORE，输出是LOWER_CAMEL
        orderColumn = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL,orderColumn);
        System.out.println(orderColumn);//orderColumn
    }