您可以尝试JsonUnit。它可以比较两个JSON对象并报告差异。它建在杰克逊的顶部。

例如

assertThatJson("{\"test\":1}").isEqualTo("{\n\"test\": 2\n}");

结果

java.lang.AssertionError: JSON documents are different:
Different value found in node "test". Expected 1, got 2.

这可能会帮助那些使用Spring Framework的人。你可以重用内部使用的在ResultActions上做断言(用于控制器测试):

进口:org.springframework.test.util.JsonExpectationsHelper

你可以编写带有详细输出的测试:

java.lang.AssertionError: someObject.someArray[1].someInternalObject2.value
Expected: 456
     got: 4567

测试代码:

@Test
void test() throws Exception {

    final String json1 =
        "{" +
        "  'someObject': {" +
        "    'someArray': [" +
        "      {" +
        "        'someInternalObject': {" +
        "          'value': '123'" +
        "        }" +
        "      }," +
        "      {" +
        "        'someInternalObject2': {" +
        "          'value': '456'" +
        "        }" +
        "      }" +
        "    ]" +
        "  }" +
        "}";

    final String json2 =
        "{" +
        "  'someObject': {" +
        "    'someArray': [" +
        "      {" +
        "        'someInternalObject': {" +
        "          'value': '123'" +
        "        }" +
        "      }," +
        "      {" +
        "        'someInternalObject2': {" +
        "          'value': '4567'" +
        "        }" +
        "      }" +
        "    ]" +
        "  }" +
        "}";

    new JsonExpectationsHelper().assertJsonEqual(json1, json2, true);
}

我正在使用这个，并为我工作良好(org.json.*):

package com.project1.helpers;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class JSONUtils {

    public static boolean areEqual(Object ob1, Object ob2) throws JSONException {
        Object obj1Converted = convertJsonElement(ob1);
        Object obj2Converted = convertJsonElement(ob2);
        return obj1Converted.equals(obj2Converted);
    }

    private static Object convertJsonElement(Object elem) throws JSONException {
        if (elem instanceof JSONObject) {
            JSONObject obj = (JSONObject) elem;
            Iterator<String> keys = obj.keys();
            Map<String, Object> jsonMap = new HashMap<>();
            while (keys.hasNext()) {
                String key = keys.next();
                jsonMap.put(key, convertJsonElement(obj.get(key)));
            }
            return jsonMap;
        } else if (elem instanceof JSONArray) {
            JSONArray arr = (JSONArray) elem;
            Set<Object> jsonSet = new HashSet<>();
            for (int i = 0; i < arr.length(); i++) {
                jsonSet.add(convertJsonElement(arr.get(i)));
            }
            return jsonSet;
        } else {
            return elem;
        }
    }
}

你可以尝试使用json-lib的JSONAssert类:

JSONAssert.assertEquals(
  "{foo: 'bar', baz: 'qux'}",
  JSONObject.fromObject("{foo: 'bar', baz: 'xyzzy'}")
);

给:

junit.framework.ComparisonFailure: objects differed at key [baz]; expected:<[qux]> but was:<[xyzzy]>

使用这个库:https://github.com/lukas-krecan/JsonUnit

Pom:

<dependency>
    <groupId>net.javacrumbs.json-unit</groupId>
    <artifactId>json-unit-assertj</artifactId>
    <version>2.24.0</version>
    <scope>test</scope>
</dependency>

IGNORING_ARRAY_ORDER -忽略数组中的顺序

assertThatJson("{\"test\":[1,2,3]}")
  .when(Option.IGNORING_ARRAY_ORDER)
  .isEqualTo("{\"test\": [3,2,1]}");

org。我已经推出了自己的解决方案，一个与JSONObject实例进行比较的方法。我在那个项目中没有使用复杂的JSON对象，所以我不知道这是否适用于所有场景。此外，鉴于我在单元测试中使用了这个功能，我没有在优化方面投入精力。下面就是:

public static boolean jsonObjsAreEqual (JSONObject js1, JSONObject js2) throws JSONException {
    if (js1 == null || js2 == null) {
        return (js1 == js2);
    }

    List<String> l1 =  Arrays.asList(JSONObject.getNames(js1));
    Collections.sort(l1);
    List<String> l2 =  Arrays.asList(JSONObject.getNames(js2));
    Collections.sort(l2);
    if (!l1.equals(l2)) {
        return false;
    }
    for (String key : l1) {
        Object val1 = js1.get(key);
        Object val2 = js2.get(key);
        if (val1 instanceof JSONObject) {
            if (!(val2 instanceof JSONObject)) {
                return false;
            }
            if (!jsonObjsAreEqual((JSONObject)val1, (JSONObject)val2)) {
                return false;
            }
        }

        if (val1 == null) {
            if (val2 != null) {
                return false;
            }
        }  else if (!val1.equals(val2)) {
            return false;
        }
    }
    return true;
}