Question

有一个相当复杂的Avro架构（我无法修改）。

尝试在java中模拟JSON示例：

var arr[0]=
[
 {
   "startTime": "1300",
    "endTime": "1700",
    "eventName": "Sleep",
     "end_datetime": "20180510M0100", 
     "start_datetime": "20180509M2300", 
 },
 {
    "startTime": "0800",
    "endTime": "1200", 
    "eventName": "Breakfast",
     "end_datetime": "20180507M1200", 
     "start_datetime": "20180507M0800", 
 },
 {
   "startTime": "1300",
    "endTime": "1400",
    "eventName": "Lesson",
    "end_datetime": "20180507M1400", 
     "start_datetime": "20180507M1300", 
 },
 {
    "startTime": "1300",
    "endTime": "1700",
    "eventName": "Ski",
    "end_datetime": "20180511M170000", 
    "start_datetime": "20180511M130000",
 } 
]

它一直都在失败：

GenericRecord genericRecord = AvroUtil.jsonToGenericRecord(jsonData, avroSchema);

是否有例如在线工具，它将为任何给定的Avro架构提供JSON数据的示例？（这样它可以正确匹配）

尝试嘲笑JSON数据几个小时但仍然没有成功..

Answer 1

您可以使用trevni依赖关系和测试范围创建随机数据。这里有一个示例代码

import org.apache.avro.Schema;
import org.apache.trevni.avro.RandomData;

import java.util.Iterator;

public class JSONExample {
    public static void main(String [] args){
        Schema schema = new Schema.Parser().parse("{\n" +
                "     \"type\": \"record\",\n" +
                "     \"namespace\": \"com.acme\",\n" +
                "     \"name\": \"Test\",\n" +
                "     \"fields\": [\n" +
                "       { \"name\": \"name\", \"type\": \"string\" },\n" +
                "       { \"name\": \"age\", \"type\": \"int\" },\n" +
                "       { \"name\": \"sex\", \"type\": \"string\" },\n" +
                "       { \"name\": \"active\", \"type\": \"boolean\" }\n" +
                "     ]\n" +
                "}");

        Iterator<Object> it = new RandomData(schema, 1).iterator();
        System.out.println(it.next());
    }
}

输出

{"name": "cjnyvbmetf", "age": -1757126879, "sex": "", "active": false}

maven依赖

<dependencies>
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>avro</artifactId>
        <version>1.8.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>trevni-core</artifactId>
        <classifier>tests</classifier>
        <version>1.8.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>trevni-avro</artifactId>
        <classifier>tests</classifier>
        <version>1.8.2</version>
    </dependency>
</dependencies>

Answer 2

您需要导入以下软件包

compile "org.apache.avro:avro:1.8.2"
compile "org.apache.avro:avro-tools:1.8.2"
compile "org.apache.avro:trevni-core:1.8.2"
compile "org.apache.avro:trevni-avro:1.8.2"

如何从Avro Schema创建有效的JSON示例？

2 个答案: