数据表编辑器 json 的 Java 结构

Question

我需要一个 Java 数据结构来存储数据表编辑器传递给我的一些 JSON 数据。接收到的数据格式是这样的:

{
    "action":"edit",
    "data": {
        "1009558":{
            "weekNumber":"2"
            ... (more properties)
         }
     }
}

以下是完整文档:https://editor.datatables.net/manual/server

编辑:文档显示作为表单参数发送的数据。我正在对数据进行字符串化并将其作为 JSON 发送。上面是一个例子。

“1009558”是行 ID。如果编辑器发送了多行，则会有多个数组条目(每个条目都有一个 ID)。

任何人都可以提供一些关于如何制作用于反序列化的 Java 数据结构(通过 Spring MVC)的建议吗？我可以很容易地映射“ Action ”，但我陷入了“数据”元素。

Answer 1

我宁愿建议您使用jackson .

这是您要求的示例:

package com.github.xsavikx.jackson;

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

import java.util.HashMap;
import java.util.Map;

public class JacksonTest {
    public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        Map<String, DatabaseRow> data = new HashMap<>();
        DatabaseRow row = new DatabaseRow(2, "someData");
        data.put("1009558", row);
        String action = "action";
        DatabaseEntry dbEntry = new DatabaseEntry();
        dbEntry.setAction(action);
        dbEntry.setData(data);
        System.out.println(objectMapper.writeValueAsString(dbEntry));
    }
}

结果:

{"action":"action","data":{"1009558":{"weekNumber":2,"someData":"someData"}}}

型号:

package com.github.xsavikx.jackson;

import java.util.Map;

public class DatabaseEntry {
    private String action;
    private Map<String, DatabaseRow> data;

    public DatabaseEntry() {

    }

    public DatabaseEntry(String action, Map<String, DatabaseRow> data) {
        this.action = action;
        this.data = data;
    }

    public Map<String, DatabaseRow> getData() {

        return data;
    }

    public void setData(Map<String, DatabaseRow> data) {
        this.data = data;
    }

    public String getAction() {
        return action;
    }

    public void setAction(String action) {
        this.action = action;
    }
}

package com.github.xsavikx.jackson;

public class DatabaseRow {
    private int weekNumber;
    private String someData;
    public DatabaseRow(){
    }
    public DatabaseRow(int weekNumber, String someData) {
        this.weekNumber = weekNumber;
        this.someData = someData;
    }

    public int getWeekNumber() {
        return weekNumber;
    }

    public void setWeekNumber(int weekNumber) {
        this.weekNumber = weekNumber;
    }

    public String getSomeData() {
        return someData;
    }

    public void setSomeData(String someData) {
        this.someData = someData;
    }
}

更新:使用 map map 更通用的解决方案:

package com.github.xsavikx.jackson;

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

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class JacksonTest {
    public static void main(String[] args) throws IOException {
        serializeTest();
        deserializeTest();
    }
    private static void deserializeTest() throws IOException {
        ObjectMapper objectMapper = new ObjectMapper();
        DatabaseEntry databaseEntry = objectMapper.readValue("{\"action\":\"action\",\"data\":{\"1009558\":{\"weekNumber\":2,\"someData\":\"someData\"}}}", DatabaseEntry.class);
        System.out.println(databaseEntry);
    }

    private static void serializeTest() throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        Map<String,Map<String,String>> data = new HashMap<>();
        Map<String,String> values = new HashMap<>();
        values.put("weekDay","2");
        values.put("unpredictableValue","value");
        data.put("1009558", values);
        String action = "action";
        DatabaseEntry dbEntry = new DatabaseEntry();
        dbEntry.setAction(action);
        dbEntry.setData(data);
        System.out.println(objectMapper.writeValueAsString(dbEntry));
    }
}

型号: 包 com.github.xsavikx.jackson;

import java.util.Map;

public class DatabaseEntry {
    private String action;
    private Map<String, Map<String,String>> data;

    public DatabaseEntry() {

    }

    public String getAction() {
        return action;
    }

    public void setAction(String action) {
        this.action = action;
    }

    public Map<String, Map<String, String>> getData() {
        return data;
    }

    public void setData(Map<String, Map<String, String>> data) {
        this.data = data;
    }
}