问题描述
例如:
Json A =>
{
"customer": {
"age": 29,"fullName": "Emily Jenkins","year":1988,"address":{
"lineOne":"lineOne","lineTwo":"lineTwo"
}
},"handset":{
"phone":"0123456789","colour":"black"
}
}
Json B =>
{
"customer": {
"fullName": "Sammy J","age": 31,"year":1985,"address":{
"lineTwo":"lineTwo","lineOne":"lineOne"
}
},"handset":{
"colour":"red","phone":"0123456788"
}
}
我想比较这两个json,并且当键匹配并且两个json结构相同时,它应该返回true。那么有没有一种干净的方法呢?
我知道使用Gson lib可以比较两个JsonElement,但是它们也将匹配值,但我不想将其作为用例的约束。
JsonParser parser = new JsonParser();
JsonElement p1 = parser.parse(JsonA);
JsonElement p2 = parser.parse(JsonB);
System.out.printf(p1.equals(p2) ? "Equal" : "Not Equal"); //it returns true if values are same.
解决方法
这确实是JSON模式验证的一种情况,请参考Core和Validation。
有一些可用的JSON模式验证器,对于以下示例,我正在使用enter link description here。库二进制文件在Maven中可用,也可以下载(连同所有依赖项和javadoc)from here。其他验证器也可用from here。
经历this guide也许会有所帮助。
该示例的架构如下(SampleJsonSchema.json):
{
"$schema":"http://json-schema.org/draft-07/schema#","id":"http://test.org/sampleJsonSchema1","title":"SampleJSONSchema","description":"This is the description","type":"object","properties":{
"customer":{
"type":"object","properties":{
"fullname":{"type":"string"},"age":{"type":"integer"},"year":{"type":"integer"},"address":{
"type":"object","properties":{
"lineOne":{"type":"string"},"lineTwo":{"type":"string"}
},"required":["lineOne","lineTwo"],"maxProperties":2
}
},"required":["fullname","age","year","address"],"maxProperties":4
},"handset":{
"type":"object","properties":{
"phone":{"type":"string"},"colour":{"type":"string"}
},"required":["phone","colour"],"maxProperties":2
}
}
}
使用的数据如下(SampleJsonData.json:
{
"customer": {
"fullname": "Emily Jenkins","age": 29,"year":1988,"address":{
"lineOne":"lineOne","lineTwo":"lineTwo"
}
},"handset":{
"phone":"0123456789","colour":"black"
}
}
验证例程如下:
打包org.test;
import java.io.File;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import com.github.fge.jsonschema.main.JsonSchema;
import com.github.fge.jsonschema.main.JsonSchemaFactory;
public class JsonValidation {
public static void main(String[] args) throws Exception{
String jsonSchemaPath="F:\\workspaces\\utilities\\TestJava\\jsonSchema\\SampleJsonSchema.json";
String jsonDataPath="F:\\workspaces\\utilities\\TestJava\\jsonSchema\\SampleJsonData.json";
ObjectMapper mapper=new ObjectMapper();
JsonNode schemaNode=mapper.readValue(new File(jsonSchemaPath),JsonNode.class);
JsonNode dataNode=mapper.readValue(new File(jsonDataPath),JsonNode.class);
JsonSchema jsonSchema=JsonSchemaFactory.byDefault().getJsonSchema(schemaNode);
ProcessingReport validationReport=jsonSchema.validate(dataNode);
System.out.println(validationReport.toString());
}//main closing
}//class closing
通过更改架构和数据以观察不同的结果,可以运行许多测试。