获取resource下文件路径

Myth丶恋晨 2023-07-10 15:39 5阅读 0赞

String path = xxx.class.getClassLoader().getResource("targetFile.txt").getPath();  
\#java获取文件目录  
├── pom.xml  
├── src  
│   ├── main  
│   │   ├── java  
│   │   │   ├── com  
│   │   │   │   ├── alipay  
│   │   │   │   │   ├── ResourceTest.java  
│   │   │   │   │   └── Resource.java  
│   │   └── resources  
│   │   │   ├── conf  
│   │   │   │   ├── sysConf.json  
│   │   │   └── request.xml  
└── local.iml

public class ResourceTest \{  
    public static void main(String\[\] args) \{  
        // 1、通过Class的getResource方法  
        String a1 = ResourceTest.class.getResource("/com/alipay/Resource.class").getPath();  
        String a2 = ResourceTest.class.getResource("Resource.class").getPath();  
        String a3 = ResourceTest.class.getResource("/request.xml").getPath();  
        String a4 = ResourceTest.class.getResource("../../request.xml").getPath();  
        String a5 = ResourceTest.class.getResource("/conf/sysConf.json").getPath();  
        String a6 = ResourceTest.class.getResource("../../conf/sysConf.json").getPath();  
   
        // 2、通过本类的ClassLoader的getResource方法  
        String b1 = ResourceTest.class.getClassLoader().getResource("com/alipay/Resource.class").getPath();  
        String b2 = ResourceTest.class.getClassLoader().getResource("request.xml").getPath();  
        String b3 = ResourceTest.class.getClassLoader().getResource("conf/sysConf.json").getPath();  
   
        // 3、通过ClassLoader的getSystemResource方法  
        String c1 = ClassLoader.getSystemClassLoader().getResource("com/alipay/Resource.class").getPath();  
        String c2 = ClassLoader.getSystemClassLoader().getResource("request.xml").getPath();  
        String c3 = ClassLoader.getSystemClassLoader().getResource("conf/sysConf.json").getPath();  
   
        // 4、通过ClassLoader的getSystemResource方法  
        String d1 = ClassLoader.getSystemResource("com/alipay/Resource.class").getPath();  
        String d2 = ClassLoader.getSystemResource("request.xml").getPath();  
        String d3 = ClassLoader.getSystemResource("conf/sysConf.json").getPath();  
   
        // 5、通过Thread方式  
        String e1 = Thread.currentThread().getContextClassLoader().getResource("com/alipay/Resource.class").getPath();  
        String e2 = Thread.currentThread().getContextClassLoader().getResource("request.xml").getPath();  
        String e3 = Thread.currentThread().getContextClassLoader().getResource("conf/sysConf.json").getPath();  
    \}  
\}  
由于maven打包会把 src/main/java 和 src/main/resources 下的文件放到 target/classes 下，所以下面统一以根路径代表此目录，总结起来有以下几个规律：

Class.getResource()的资源获取如果以 / 开头，则从根路径开始搜索资源。  
Class.getResource()的资源获取如果不以 / 开头，则从当前类所在的路径开始搜索资源。  
ClassLoader.getResource()的资源获取不能以 / 开头，统一从根路径开始搜索资源。  
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版权声明：本文为CSDN博主「Captain249」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。  
原文链接：https://blog.csdn.net/Captain249/article/details/98172911