项目windows运行正常,而Linux上运行报错: class path resource [kwhRules.json] cannot be resolved to absolute file

Posted 2021-03-07 Peter Jones

java.io.FileNotFoundException:
class path resource [kwhRules.json] 
cannot be resolved to absolute file path because it does not reside in the file system: 
jar:file:/root/app/target/app.jar!/BOOT-INF/classes!/kwhRules.json

更改前代码:

void initRules() throws IOException {
       var file = ResourceUtils.getFile("classpath:kwhRules.json");var ob = new ObjectMapper();
        this.rawRules = ob.readValue(file, Map.class);
}

更改后代码:

void initRules() throws IOException {var classPathResource = new ClassPathResource("kwhRules.json");
        var ob = new ObjectMapper();
        this.rawRules = ob.readValue(classPathResource.getInputStream(), Map.class);
}

错误原因:

 ResourceUtils.getFile("classpath:config.json") 这

个方法只能从类路径下获取文件,无法从jar包中获取.  打成jar包后发布到linuxs系统,就报错找不到文件了.

ClassPathResource classPathResource = new ClassPathResource("config.json"); 可以从jar包获取文件.