文本块

    @Test
    public void jinTest() {
        String str = "{\n" +
                "  \"columnName\": \"PACK_STOCK_ID\",\n" +
                "  \"dataType\": \"BIGINT\"\n" +
                "}";
        System.out.println(str);
        String strJson = """
                    {
                      "columnName": "PACK_STOCK_ID",
                      "dataType": "BIGINT"
                    }
                """;
        System.out.println(strJson);
    }

输出

{
  "columnName": "PACK_STOCK_ID",
  "dataType": "BIGINT"
}
    {
      "columnName": "PACK_STOCK_ID",
      "dataType": "BIGINT"
    }

注意：""" """ 在IDEA中缩进，在输出结果中也存在相同缩进