【SpringBoot下的文件读取】如何读取SpringBoot项目中resources中的文件（配置类、txt文件示例）

之前一直没有注意，当去加载resources下的配置文件时，忘记怎么做了，这次整理了一下这篇文章

一、加载配置文件方法

config.properties

appId=*******
apiKey=*******

PropertiesConfig

public class PropertiesConfig {
    
    
    private static final String APP_ID;
    private static final String API_KEY;
        static {
    
    
        Properties properties = new Properties();
        try {
    
    
            ClassPathResource resource = new ClassPathResource("config.properties");
            InputStream in = resource.getInputStream();
            BufferedReader bf = new BufferedReader(new InputStreamReader(in,"UTF-8"));
            properties.load(bf);
        } catch (IOException e) {
    
    
            throw new RuntimeException("加载配置文件失败");
        }
        APP_ID = properties.getProperty("appId");
        API_SECRET = properties.getProperty("apiSecret");
        }
    public static String getAppId() {
    
    
        return APP_ID;
    }

    public static String getApiKey() {
    
    
        return API_KEY;
    }

二、加载resources中的txt到map

public static Map<String,String> readTxtFile() {
    
    
        Map<String,String> map = new HashMap<>();
        try {
    
    
            final String[] txtFiles = new String[]{
    
    "xxxx.txt","xxxx.txt"};
            for (String fileName : txtFiles) {
    
    
                byte[] bytes;
                ClassPathResource classPathResource = new ClassPathResource(fileName);
                //获取文件流
                InputStream keyStream = classPathResource.getInputStream();
                bytes = IOUtils.toByteArray(keyStream);

                keyStream.read(bytes);
                keyStream.close();

                ByteArrayInputStream certBis = new ByteArrayInputStream(bytes);
                InputStreamReader input = new InputStreamReader(certBis);
                BufferedReader bf = new BufferedReader(input);
                String line;
                while((line=bf.readLine()) != null){
    
    
					//取到第一行的字符 line ，根据业务需要随意处理，这里是处理 :分隔 存了下map
                    String[] ms = line.split(":");
                    map.put(ms[0],ms[1]);
                }

            }
            log.info("------加载Q&A预设文件:  " + map);
            return map;
        } catch (IOException e) {
    
    
            log.error("加载Q&A预设文件失败",e);
        }
        return map;
    }