两个json的深度对比
在网上找了好多资料都没有找到想要的，还是自己写个吧！
上代码！！！
1.pom.xml中加入
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>2.新建CompareJson.java类
package com.suncompass.huanjinyingji.uitl;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;
import java.util.*;
public class CompareJson {
private static final String SysRoot = "sys_root";
private static final String SysType = "sys_type";
private static final String SysObj = "sys_obj";
private static final String SysNew = "sys_new";
private static final String SysOld = "sys_old";
private static final String TypeNew = "new";
private static final String TypeDelete = "delete";
private static final String TypeDifference = "difference";
private String itemKey;
private List<String> ignoreKeys = new ArrayList<>();
public CompareJson(String itemKey) {
this.itemKey = itemKey;
}
public CompareJson(String itemKey, String ignoreKeys) {
this.itemKey = itemKey;
this.ignoreKeys = Arrays.asList(ignoreKeys.split("\\,"));
}
public static void main(String[] args) {
final String json1 = "{\"id\":\"1\",\"name\":\"n1\",\"height\":null,\"list\":[1,2,3],\"age\":0,\"items\":[{\"id\":\"11\",\"name\":\"n11\",\"copyId\":\"1\"},{\"id\":\"12\",\"name\":\"n12\",\"copyId\":\"2\"}]}";
final String json2 = "{\"id\":\"1\",\"name\":\"n2\",\"height\":180,\"list\":[3,4,5],\"age\":null,\"items\":[{\"id\":\"11\",\"name\":\"n11\",\"copyId\":\"3\"},{\"id\":\"12\",\"name\":\"n13\",\"copyId\":\"2\"}]}";
String resultStr = new CompareJson("copyId").compareJson(json1, json2);
System.out.println(resultStr);
}
private void compareJson(JSONObject jsonObject1, JSONObject jsonObject2, Map<String, Object> objectMap) {
Iterator<String> iterator = jsonObject1.keySet().iterator();
while (iterator.hasNext()) {
String key = iterator.next();
if (ignoreKeys.contains(key)) {
continue;
}
Object value1 = jsonObject1.get(key);
Object value2 = jsonObject2.get(key);
compareJson(key, value1, value2, objectMap);
}
}
private void compareJson(JSONArray jsonArray1, JSONArray jsonArray2, List<Map<String, Object>> arrayMap) {
JSONArray jsonArray = (JSONArray) jsonArray1.clone();
if (jsonArray2 != null) {
jsonArray.addAll(jsonArray2);
}
for (int i = 0; i < jsonArray.size(); i++) {
JSONObject jsonObject = (JSONObject) jsonArray.get(i);
Object keyValue = jsonObject.get(this.itemKey);
if (keyValue == null) {
continue;
}
JSONObject jsonObject1 = null;
for (int j = 0; j < jsonArray1.size(); j++) {
JSONObject jsonObj = (JSONObject) jsonArray1.get(j);
if (keyValue.equals(jsonObj.get(this.itemKey))) {
jsonObject1 = jsonObj;
break;
}
}
JSONObject jsonObject2 = null;
for (int j = 0; j < jsonArray2.size(); j++) {
JSONObject jsonObj = (JSONObject) jsonArray2.get(j);
if (keyValue.equals(jsonObj.get(this.itemKey))) {
jsonObject2 = jsonObj;
break;
}
}
Map<String, Object> objectMap = new HashMap<>();
if (jsonObject1 != null && jsonObject2 == null) {
objectMap.put(this.itemKey, keyValue);
objectMap.put(SysType, TypeNew);
objectMap.put(SysObj, jsonObject1);
} else if (jsonObject1 == null && jsonObject2 != null) {
objectMap.put(this.itemKey, keyValue);
objectMap.put(SysType, TypeDelete);
objectMap.put(SysObj, jsonObject2);
} else {
Map<String, Object> differenceMap = new HashMap<>();
compareJson(jsonObject1, jsonObject2, differenceMap);
if (differenceMap.size() > 0) {
objectMap.put(this.itemKey, keyValue);
objectMap.put(SysType, TypeDifference);
objectMap.put(SysObj, differenceMap);
}
}
if (objectMap.size() > 0) {
Map<String, Object> findMap = null;
for (Map<String, Object> map : arrayMap) {
if (keyValue.equals(map.get(this.itemKey))) {
findMap = map;
break;
}
}
if (findMap == null) {
arrayMap.add(objectMap);
}
}
}
}
private void compareJson(String key, Object json1, Object json2, Map<String, Object> resultMap) {
if (json1 instanceof JSONObject) {
Map<String, Object> objectMap = new HashMap<>();
compareJson((JSONObject) json1, (JSONObject) json2, objectMap);
if (objectMap.size() > 0) {
resultMap.put(key, objectMap);
}
} else if (json1 instanceof JSONArray) {
JSONArray jsonArray = (JSONArray) json1;
if (jsonArray != null && jsonArray.size() > 0) {
if (!(jsonArray.get(0) instanceof JSONObject)) { //["1","2"],[1,2]...
Map<String, Object> compareMap = new HashMap<>();
compareMap.put(SysNew, json1);
compareMap.put(SysOld, json2);
resultMap.put(key, compareMap);
return;
}
}
List<Map<String, Object>> arrayMap = new ArrayList<>();
compareJson((JSONArray) json1, (JSONArray) json2, arrayMap);
if (arrayMap.size() > 0) {
resultMap.put(key, arrayMap);
}
} else if ((json1 == null && json2 != null) || (json1 != null && !json1.equals(json2))) {
Map<String, Object> compareMap = new HashMap<>();
compareMap.put(SysNew, json1);
compareMap.put(SysOld, json2);
resultMap.put(key, compareMap);
}
}
public String compareJson(String json1, String json2) {
Object jsonObj1 = JSONObject.parse(json1);
Object jsonObj2 = JSONObject.parse(json2);
Map<String, Object> resultMap = new HashMap<>();
compareJson(SysRoot, jsonObj1, jsonObj2, resultMap);
String resultStr = JSON.toJSONString(resultMap.get(SysRoot), new SerializerFeature[]{SerializerFeature.WriteMapNullValue});
return resultStr;
}
}3.运行main函数输出
{
"name": {
"sys_new": "n1",
"sys_old": "n2"
},
"list": {
"sys_new": [1, 2, 3],
"sys_old": [3, 4, 5]
},
"items": [{
"copyId": "1",
"sys_type": "new",
"sys_obj": {
"copyId": "1",
"name": "n11",
"id": "11"
}
}, {
"copyId": "2",
"sys_type": "difference",
"sys_obj": {
"name": {
"sys_new": "n12",
"sys_old": "n13"
}
}
}, {
"copyId": "3",
"sys_type": "delete",
"sys_obj": {
"copyId": "3",
"name": "n11",
"id": "11"
}
}],
"age": {
"sys_new": 0,
"sys_old": null
},
"height": {
"sys_new": null,
"sys_old": 180
}
}总结：
1.支持深度；
2.支持集合指定标识设置（itemKey）；
3.支持数组（如：[1,2,3]）；
4.去除重复；
5.支持排除键设置（ignoreKeys）；
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