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qiniu-suits is a efficient tools for qiniu api implemented by java8.

There is a newer version: 8.4.8

package com.qiniu.convert;

import com.aliyun.oss.model.OSSObjectSummary;
import com.qiniu.util.LineUtils;

import java.io.IOException;
import java.util.List;
import java.util.Map;

public class OSSObjToString extends Converter {

    public OSSObjToString(String format, String separator, List rmFields) throws IOException {
        // 将 file info 的字段逐一进行获取是为了控制输出字段的顺序
        if ("json".equals(format)) {
            stringFormatter = line -> LineUtils.toFormatString(line, rmFields);
        } else if ("csv".equals(format)) {
            stringFormatter = line -> LineUtils.toFormatString(line, ",", rmFields);
        } else if ("tab".equals(format)) {
            stringFormatter = line -> LineUtils.toFormatString(line, separator, rmFields);
        } else {
            throw new IOException("please check your format for map to string.");
        }
    }

    @Override
    public String convertToV(OSSObjectSummary line) throws IOException {
        return stringFormatter.toFormatString(line);
    }
}