我可以使用SQL查询显示JSON数据吗?

时间:2018-06-09 01:01:52

标签: javascript jquery sql json database

我可以使用SQL查询显示JSON数据吗?

下面的部分是我当前的JSON数据:

[
   {
      "id":"BKU0000007",
      "judul":"jsjsj",
      "no_isbn":"ssksk",
      "penulis":"jsjsj",
      "penerbit":"iieie",
      "tahun_terbit":"2011",
      "halaman":"202",
      "berat":"220",
      "cover":"20202",
      "dimensi":"0202",
      "kategori":"Horor",
      "bahasa":"2020",
      "stok":"22020",
      "gambar":"BKU0000007.jpeg",
      "harga":"333",
      "sinopsis":"0202022"
   },
   {
      "id":"BKU0000006",
      "judul":"sshhs",
      "no_isbn":"3i3i3i",
      "penulis":"ssiis",
      "penerbit":"oo3o3",
      "tahun_terbit":"2009",
      "halaman":"20",
      "berat":"10000",
      "cover":"alks",
      "dimensi":"20x30",
      "kategori":"",
      "bahasa":"skks",
      "stok":"20",
      "gambar":"BKU0000006.jpeg",
      "harga":"29999",
      "sinopsis":"skkssk"
   }
]

    [
       {
          "id":"BKU0000007",
          "judul":"jsjsj",
          "no_isbn":"ssksk",
          "penulis":"jsjsj",
          "penerbit":"iieie",
          "tahun_terbit":"2011",
          "halaman":"202",
          "berat":"220",
          "cover":"20202",
          "dimensi":"0202",
          "kategori":"Horor",
          "bahasa":"2020",
          "stok":"22020",
          "gambar":"BKU0000007.jpeg",
          "harga":"333",
          "sinopsis":"0202022"
       },
       {
          "id":"BKU0000006",
          "judul":"sshhs",
          "no_isbn":"3i3i3i",
          "penulis":"ssiis",
          "penerbit":"oo3o3",
          "tahun_terbit":"2009",
          "halaman":"20",
          "berat":"10000",
          "cover":"alks",
          "dimensi":"20x30",
          "kategori":"",
          "bahasa":"skks",
          "stok":"20",
          "gambar":"BKU0000006.jpeg",
          "harga":"29999",
          "sinopsis":"skkssk"
       }
    ]

我想使用SQL查询生成此数据,例如:

SELECT * FROM data etc ...

我该如何完成这项任务?有人可以指导我完成这个吗?

感谢您花时间和耐心解决此事。

1 个答案:

答案 0 :(得分:0)

我可以建议如下:

a)您需要使用ObjectMapper对象

b)调用ObjectMapper对象的writeValueAsString(object)

c)要使用ObjectMapper,你需要在类路径中使用jackson core,jackson annotation,jackson databind jar

示例示例:    我创建了Example类来模拟你的解决方案 - 代码如下:

import java.util.ArrayList;
import java.util.List;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

class Example{
    int id;
    String name;

    public Example(int id, String name) {
        super();
        this.id = id;
        this.name = name;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

}
public class MainApp {

    public static void main(String[] args) throws JsonProcessingException {
        List<List<Example>> list=new ArrayList<List<Example>>();

        List<Example> exampleList1=new ArrayList<>();
        exampleList1.add(new Example(1,"A"));
        list.add(exampleList1);

        List<Example> exampleList2=new ArrayList<>();
        exampleList2.add(new Example(1,"B"));
        list.add(exampleList2);

        ObjectMapper mapper = new ObjectMapper();
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        String writeValueAsString = mapper.writeValueAsString(list);        
        System.out.println(writeValueAsString);
    }

}

输出:

[[{ “ID”:1, “名称”: “A”}],[{ “ID”:1, “名称”: “B”}]]

使用Example类替换属性。

(如果你有dao代码,那么你需要在调用sql查询并获得结果后从dao层准备示例对象列表的列表)

希望你明白了!