xiaoshi-weixinback/src/main/java/com/example/xiaoshiweixinback/service/importPatent/CommonService.java

package com.example.xiaoshiweixinback.service.importPatent;


import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.example.xiaoshiweixinback.XiaoshiWeixinbackApplication;
import com.example.xiaoshiweixinback.business.utils.FileUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.system.ApplicationHome;
import org.springframework.stereotype.Service;

import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 公用服务类
 *
 * @author lrj
 */
@Service
@Slf4j
public class CommonService {

    /**
     * 根据获得文件json
     *
     * @param fileName
     * @return
     */
    public static String readJsonFile(String fileName) {
        String json = "";
        try {
            ApplicationHome ah = new ApplicationHome(XiaoshiWeixinbackApplication.class);
            //获取 applicationHome 内的路径 ...\target\classes 到这一层级下
            File fileTem = ah.getSource();
            //获取 file的parentFile 即最后一级之前的所有层级路径(包括盘符) 这里能获得到的最终层级为  ...\target 后续用FILE_SEPARATOR(系统路径分割通配符 即 "\") 以及fileName拼接生成存放文件的目录层级 即为根目录 root
            String rootPath = fileTem.getParentFile().toString() + FileUtils.FILE_SEPARATOR + "jsons/";
//            String filePath = fileUtils.getPath("/11.docx");
            File file = new File(rootPath + fileName);
            Reader reader = new InputStreamReader(new FileInputStream(file), "utf-8");
            int ch = 0;
            StringBuffer buffer = new StringBuffer();
            while ((ch = reader.read()) != -1) {
                buffer.append((char) ch);
            }
            reader.close();
            json = buffer.toString();
            return json;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static File getFile(String fileName) {
        String json = "";
        try {
            ApplicationHome ah = new ApplicationHome(XiaoshiWeixinbackApplication.class);
            //获取 applicationHome 内的路径 ...\target\classes 到这一层级下
            File fileTem = ah.getSource();
            //获取 file的parentFile 即最后一级之前的所有层级路径(包括盘符) 这里能获得到的最终层级为  ...\target 后续用FILE_SEPARATOR(系统路径分割通配符 即 "\") 以及fileName拼接生成存放文件的目录层级 即为根目录 root
            String rootPath = fileTem.getParentFile().toString() + FileUtils.FILE_SEPARATOR ;
//            String filePath = fileUtils.getPath("/11.docx");
            File file = new File(rootPath + fileName);

            return file;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}