pom引入依赖

  <dependency>
            <groupId>org.apache.parquet</groupId>
            <artifactId>parquet-avro</artifactId>
            <version>1.13.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.parquet</groupId>
            <artifactId>parquet-hadoop</artifactId>
            <version>1.13.1</version>
        </dependency>
        
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-mapreduce-client-core</artifactId>
            <version>2.7.3</version>
        </dependency>

       <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>2.7.3</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-hdfs</artifactId>
        <version>2.7.3</version>
    </dependency>

读取parquet代码

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.parquet.example.data.Group;
import org.apache.parquet.hadoop.example.GroupReadSupport;
import org.apache.parquet.hadoop.metadata.ColumnChunkMetaData;
import java.io.IOException;
import java.util.List;
import org.apache.parquet.hadoop.ParquetReader;

public class ParquetRead {

    public static void main(String[] args) {
        try {
            // 指定 Parquet 文件路径
            Path parquetFilePath = new Path("C:\\\\Users\\\\Administrator\\\\Desktop\\\\111\\\\07fe7433-99c2-41d8-a91d-27a77d99f690-0_4-8-0_20230510103931772.parquet");
           //查询总列数，参考博客https://blog.csdn.net/letterss/article/details/131189471?spm=1001.2014.3001.5501
            int allColumnsCount = getParquetAllColumnsCount(parquetFilePath);
            int columnIndexMax = -1;
            columnIndexMax = allColumnsCount - 1;
            // 创建 ParquetReader.Builder 实例
            ParquetReader.Builder<Group> builder = ParquetReader.builder(new GroupReadSupport(), parquetFilePath);
            // 创建 ParquetReader 实例
            ParquetReader<Group> reader = builder.build();
            // 循环读取 Parquet 文件中的记录
            Group record;

            while ((record = reader.read()) != null) {
                // 处理每个记录的逻辑
                for (int i = 0; i <= columnIndexMax; i++) {
                    Object field = record.getValueToString(i, 0);
                    System.out.println(field);
                }
            }
            // 关闭读取器
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}