public static String toJSONString(Object object) {
        return JSON.toJSONString(object);
    }
@Test
    public void toJSONString() throws Exception {
        Assert.assertEquals(JSONUtils.toJSONString("xxx"), "\"xxx\"");
        Assert.assertEquals(JSONUtils.toJSONString(1), "1");
        Assert.assertEquals(JSONUtils.toJSONString(2.2d), "2.2");
        Assert.assertEquals(JSONUtils.toJSONString(false), "false");
        Assert.assertEquals(JSONUtils.toJSONString(new HashMap()), "{}");
        Assert.assertEquals(JSONUtils.toJSONString(new ArrayList()), "[]");
        Assert.assertEquals(JSONUtils.toJSONString(new Object[0]), "[]");
    }