spring常用方法

1. 读取配置文件信息

方式一：

// 获取文件路径
String fileName = "application.yaml";
String filePath = this.getClass().getClassLoader().getResource(fileName).getPath();

BufferedReader bufferedReader = new BufferedReader(new FileReader(path));
Stringline = null;
StringBuilder fileData = new StringBuilder();
while ((line = bufferedReader.readLine()) != null) {
    fileData.append(line).append(System.lineSeparator());
}
bufferedReader.close();

//或
StringBuilder fileData = new StringBuilder();
int value;
while ((value = bufferedReader.read()) != -1) {
    char c = (char) value;
    fileData.append(c);
}
bufferedReader.close();

//或使用hutool的IoUtil
String fileData = IoUtil.read(new FileInputStream(path), Charset.forName("UTF-8"));
System.out.println(fileData);

方式二：

String fileName = "application.yaml";
ClassPathResource classPathResource = new ClassPathResource(fileName);
String fileData = IoUtil.read(classPathResource.getStream(), Charset.forName("utf-8"));

方式三：

String fileData = IoUtil.read(JDBCUtils.class.getClassLoader().getResourceAsStream("application.yaml"), Charset.forName("UTF-8"));
System.out.println(fileData);

方式四：

String fileData = IoUtil.read(ResourceUtil.getStream("application.yaml"), Charset.forName("UTF-8"));
System.out.println(fileData);