java读取Resources下文件

第一种，读为流文件

InputStream path = this.getClass().getResourceAsStream("/data.txt");

BufferedReader reader = new BufferedReader(new InputStreamReader(path));

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第二种， 读取路径

Thread.currentThread().getContextClassLoader()。

URL l1 =

Thread.currentThread().getContextClassLoader().getResource("readFile/test1.xml");

System.out.println(l1);

URL l2 =

Thread.currentThread().getContextClassLoader().getResource("collection/test2.xml");

System.out.println(l2);

URL l3 = Thread.currentThread().getContextClassLoader().getResource("test3.xml");

String l4=l3.getPath();//加上getPath()则去掉前面的file:

System.out.println(l3);  //     file:/F:/demo/Studying/out/production/Studying/test3.xml

System.out.println(l4);//      /F:/demo/Studying/out/production/Studying/test3.xml

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第三种， 读为流文件

InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("conf/job_two_one_mapping.txt");

try(Scanner scanner = new Scanner(is)) {

while (scanner.hasNextLine()) {

System.out.println(scanner.nextLine());

}

} catch (Exception e) {

log.error("读取文件数据异常" ,e);

}

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第四种， 读取路径

ResourceBundle bundle = ResourceBundle.getBundle("config");

String url = bundle.getString("url");

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该方法默认读取的是resources文件夹下的以.properties为后缀的文件，代码中的例子即为config.properties

第五种， 读为流文件

InputStream inputStream = Resources.class.getResourceAsStream(“/mybatis.xml”);或者

InputStream resourceAsStream = Resources.class.getClassLoader().getResourceAsStream("a.py");

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第六种， 读取路径

URL resource = Resources.class.getClassLoader().getResource("");

String path = resource.getPath();

底层如下：

public static URL getResource(String resourceName) {

ClassLoader loader = MoreObjects.firstNonNull(

Thread.currentThread().getContextClassLoader(),

Resources.class.getClassLoader());

URL url = loader.getResource(resourceName);

checkArgument(url != null, "resource %s not found.", resourceName);

return url;

}

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原文链接：https://blog.csdn.net/qq_41622739/article/details/97819146