xxl.mathematica.io.Import Maven / Gradle / Ivy

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package xxl.mathematica.io;

import com.google.gson.reflect.TypeToken;
import org.apache.commons.io.IOUtils;
import xxl.apache.commons.codec.Charsets;
import xxl.mathematica.io.excel.AbsExcel;
import xxl.mathematica.io.excel.IExcel;
import xxl.mathematica.single.GsonSingle;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;

/**
 * 导入
 */
public class Import {
    /**
     * 默认jxl，支持android
     *
     * @param file
     * @return
     */
    public static List> importExcel(String file) {
        return importExcel(IExcel.JXL, file);
    }

    /**
     * 导入excel为字符串
     *
     * @param method
     * @param file
     * @return
     */
    public static List> importExcel(int method, String file) {
        try {
            return AbsExcel.getExcelImpl(method).importExcel(file);
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 默认jxl，支持android
     *
     * @param file
     * @return
     */
    public static  List> importExcel(String file, Class cls) {
        return importExcel(IExcel.JXL, file, cls);
    }

    /**
     * 导入excel为对象
     *
     * @param method
     * @param file
     * @return
     */
    public static  List> importExcel(int method, String file, Class cls) {
        try {
            return AbsExcel.getExcelImpl(method).importExcel(file, cls);
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 以Json的格式导入为对象
     * UTF-8
     *
     * @param file
     * @return
     */
    public static Map importJson(String file) {
        try {
            return GsonSingle.instance().fromJson(new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8), new TypeToken>() {
            }.getType());
        } catch (FileNotFoundException e) {
            return null;
        }
    }

    /**
     * 以Json的格式导入为字符串
     * UTF-8
     *
     * @param file
     * @return
     */
    public static Map importJsonAsString(String file) {
        try {
            return GsonSingle.instance().fromJson(new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8), new TypeToken>() {
            }.getType());
        } catch (FileNotFoundException e) {
            return null;
        }
    }


    /**
     * 以文本形式导入
     *
     * @param file
     * @return
     */
    public static String importText(String file) {
        try (FileInputStream fis = new FileInputStream(file)) {
            return IOUtils.toString(fis, Charsets.UTF_8);
        } catch (IOException e) {
            return null;
        }
    }
}