如何对spring data mongodb中的所有字段进行索引？

import org.springframework.data.mongodb.core.index.CompoundIndex;
import org.springframework.data.mongodb.core.index.CompoundIndexes;
import org.springframework.data.mongodb.core.index.Indexed;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "your_collection_name")
@CompoundIndexes({
    @CompoundIndex(name = "your_index_name", def = "{'field1': 1, 'field2': -1}")
})
public class YourEntity {
    @Indexed
    private String field1;

    @Indexed
    private int field2;

    // 其他字段...

    // 构造函数、getter和setter方法...
}