Java File 和 各种流

1.Java读取File文件

1.1读取相对路径下的file

方式一：Spring 的 ResourceLoader:

    @Autowired
    private ResourceLoader resourceLoader;

　　//path 为resources 文件
    public void initWorkFlow(String path) throws Exception {

        String line = null;
        {
            Resource workFlowResource = resourceLoader.getResource("classpath:"+path);
            BufferedReader brWorkFlow = new BufferedReader(new InputStreamReader(workFlowResource.getInputStream()));
            StringBuilder sb = new StringBuilder();
            while ((line = brWorkFlow.readLine()) != null) {
                sb.append(line);
            }
            String  result = sb.toString();
　　}

方式二：用Java的Files和Paths:

    public void getPDDocument(String path) throws IOException {
        byte[] in = Files.readAllBytes(Paths.get(new File("").getAbsolutePath()+"/src/test/resources/"+path));
        String result = new String(in);
    }

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