Java读取本地文件进行unicode解码

工具使用:

package test.opservice;

import eh.util.MapValueUtil;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

/**
 * Created by houxr on 2016/11/14.
 */
public class ImportParseText {

    public static void readFileByLines(String fileName) {
        File file = new File(fileName);
        BufferedReader reader = null;
        try {
            System.out.println("以行为单位读取文件内容，一次读一整行：");
            reader = new BufferedReader(new FileReader(file));
            String tempString = null;
            int line = 1;
            // 一次读入一行，直到读入null为文件结束
            while ((tempString = reader.readLine()) != null) {
                // 显示行号
                System.out.println("line " + line + ": " + MapValueUtil.ascii2native(tempString));
                line++;
            }
            System.out.println("读取结果:" + tempString);
            System.out.println("转换后结果:" + MapValueUtil.ascii2native(tempString));
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                }
            }
        }
    }

    public static void main(String[] args) {
        readFileByLines("D:/dekeResult.txt");
    }
}

 工具类:

package eh.util;

import com.google.gson.Gson;
import org.apache.commons.lang3.StringUtils;

import java.util.Date;
import java.util.Map;

/**
 * author:houxr
 * date:2016/6/2.
 */
public class MapValueUtil {

    public static String getString(Map<String, Object> map, String key) {
        Object obj = getObject(map, key);
        if (null == obj) {
            return "";
        }

        if (obj instanceof String) {
            return obj.toString();
        }

        return "";
    }

    public static Integer getInteger(Map<String, Object> map, String key) {
        Object obj = getObject(map, key);
        if (null == obj) {
            return null;
        }

        if (obj instanceof Integer) {
            return (Integer) obj;
        }

        if (obj instanceof String) {
            return Integer.valueOf(obj.toString());
        }

        return null;
    }

    public static Date getDate(Map<String, Object> map, String key) {
        Object obj = getObject(map, key);
        if (null == obj) {
            return null;
        }

        if (obj instanceof Date) {
            return (Date) obj;
        }

        return null;
    }

    public static Float getFloat(Map<String, Object> map, String key) {
        Object obj = getObject(map, key);
        if (null == obj) {
            return null;
        }

        if (obj instanceof Float) {
            return (Float) obj;
        }

        return null;
    }

    public static Double getDouble(Map<String, Object> map, String key) {
        Object obj = getObject(map, key);
        if (null == obj) {
            return null;
        }

        if (obj instanceof Double) {
            return (Double) obj;
        }

        if (obj instanceof Float) {
            return Double.parseDouble(obj.toString());
        }

        if (obj instanceof Integer) {
            return Double.parseDouble(obj.toString());
        }

        return null;
    }

    public static Object getObject(Map<String, Object> map, String key) {
        if (null == map || StringUtils.isEmpty(key)) {
            return null;
        }

        return map.get(key);
    }

    /**
     * json 转换为 实体对象
     *
     * @param str
     * @param type
     * @param <T>
     * @return
     */
    public static <T> T fromJson(String str, Class<T> type) {
        Gson gson = new Gson();
        try {
            T t = gson.fromJson(str, type);
            return t;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * asciicode 转为中文
     *
     * @param asciicode eg:{"code":400002,"msg":"u7b7eu540du9519u8bef"}
     * @return eg:{"code":400002,"msg":"签名错误"}
     */
    public static String ascii2native(String asciicode) {
        String[] asciis = asciicode.split("\\u");
        String nativeValue = asciis[0];
        try {
            for (int i = 1; i < asciis.length; i++) {
                String code = asciis[i];
                nativeValue += (char) Integer.parseInt(code.substring(0, 4), 16);
                if (code.length() > 4) {
                    nativeValue += code.substring(4, code.length());
                }
            }
        } catch (NumberFormatException e) {
            return asciicode;
        }
        return nativeValue;
    }

}