java set diff_JAVA 实现json diff

朱雀 2022-11-03 04:17 111阅读 0赞

使用java实现复杂结构多层级的json diff

主要思路：遍历json，根据key排序，判断json element类型，如果是jsonArray的话，转成list并排序，并循环验证list中的每个json element是否相等

package service.utils;

import com.google.gson.\*;

import org.slf4j.\*;

import org.testng.Assert;

import java.util.\*;

public class JsonDiffUtil \{

private static final JsonParser parser = new JsonParser();

private static final Gson gson = new Gson();

//默认是忽略值比较

private boolean diffValue = false;

private static final Logger logger = LoggerFactory.getLogger(JsonDiffUtil.class);

public JsonDiffUtil()\{\};

public JsonDiffUtil(boolean diffValue)\{

this.diffValue = diffValue;

/\*

\* 验证两个json字符串结构是否一致，正反两次比较

\*/

public void diff(String exceptJson,String actualJson)\{

Assert.assertTrue(equals(exceptJson, actualJson));

Assert.assertTrue(equals(actualJson, exceptJson));

/\*\*

\* 比较两个json字符串是否

\*/

public boolean equals(String exceptJson, String actualJson) \{

if(exceptJson.equals(actualJson))\{

return true;

//json String 转 JsonElement

JsonElement exceptJsonElement = parser.parse(exceptJson);

JsonElement actualJsonElement = parser.parse(actualJson);

//按key排序

sort(exceptJsonElement);

sort(actualJsonElement);

return equals(exceptJsonElement, actualJsonElement);

private boolean equals(JsonElement except, JsonElement actual) \{

if (except.isJsonObject()) \{

return equals(except.getAsJsonObject(), actual.getAsJsonObject());

\} else if (except.isJsonArray() ) \{

return equals(except.getAsJsonArray(), actual.getAsJsonArray());

\} else if (except.isJsonPrimitive()) \{

return equals(except.getAsJsonPrimitive(), actual.getAsJsonPrimitive());

\} else \{

logger.info("except= \{\},actual= \{\}",except,actual);

return false;

private boolean equals(JsonObject except, JsonObject actual) \{

Set exceptSet = except.keySet();

for (String key : exceptSet) \{

JsonElement exceptValue = except.get(key);

JsonElement actualValue = actual.get(key);

if(actualValue == null)\{

logger.error("not found key："+key);

return false;

if (exceptValue.isJsonArray() && exceptValue.getAsJsonArray().size() != actualValue.getAsJsonArray().size()) \{

logger.error("JSON Array size not equal,key is \{\}",key);

return false;

boolean flag = equals(exceptValue, actualValue);

if(!flag)\{

if(exceptValue.isJsonPrimitive())\{

if (diffValue) \{

logger.error("value not equal,key is \{\}, except value is \{\}, actual value is \{\}",key,exceptValue,actualValue);

else \{

logger.error("not found key："+key);

return false;

return true;

private boolean equals(JsonArray exceptArray, JsonArray actualArray) \{

List exceptList = toSortedList(exceptArray);

List actaulList = toSortedList(actualArray);

for (int i = 0; i < exceptList.size(); i++) \{

if (!equals(exceptList.get(i), actaulList.get(i))) \{

return false;

return true;

private boolean equals(JsonPrimitive except, JsonPrimitive actual) \{

if(!diffValue)\{

return actual != null;

return except.equals(actual);

private List toSortedList(JsonArray array) \{

List list = new ArrayList<>();

array.forEach(list::add);

list.sort(Comparator.comparing(gson::toJson));

return list;

/\*

\* 根据json key排序

\*/

public static void sort(JsonElement je) \{

if (je.isJsonNull()) \{

return;

if (je.isJsonPrimitive()) \{

return;

if (je.isJsonArray()) \{

JsonArray array = je.getAsJsonArray();

Iterator it = array.iterator();

while (it.hasNext()) \{

sort(it.next());

return;

if (je.isJsonObject()) \{

Map tm = new TreeMap(getComparator());

for (Map.Entry en : je.getAsJsonObject().entrySet()) \{

tm.put(en.getKey(), en.getValue());

for (Map.Entry en : tm.entrySet()) \{

je.getAsJsonObject().remove(en.getKey());

je.getAsJsonObject().add(en.getKey(), en.getValue());

sort(en.getValue());

return;

private static Comparator getComparator() \{

return String::compareTo;

用到的依赖包

org.testng

testng

6.9.8

com.google.code.gson

gson

2.8.5

org.slf4j

slf4j-log4j12

1.7.25

java set diff_JAVA 实现json diff

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