Springboot报class path resource [xxxxx.json] cannot be resolved to URL because it dose not exist问题解决

当Springboot解析resources文件下的json文件时，在本地环境好用，部署到服务器上找不到文件内容 报错class path resource [xxxxx.json] cannot be resolved to URL because it dose not exist

问题排查

（1）pom.xml文件配置

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.json</include>
            </includes>
        </resource>
        <resource>
            <directory>src/main/another-resources</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
        </resource>
    </resources>
</build>

（2）解析classpath下的文件时，要以流的方式去读取，否则打包后读取不到（此种方式本地和服务器都支持）

import org.springframework.core.io.Resource;
import org.springframework.core.io.ClassPathResource;
import org.springframework.util.FileCopyUtils;

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

@Service
public class FileService {

    public String readFileFromResourcesFolder() throws IOException {
        Resource resource = new ClassPathResource("data.txt");
        try (InputStream inputStream = resource.getInputStream()) {
            byte[] bdata = FileCopyUtils.copyToByteArray(inputStream);
            return new String(bdata, StandardCharsets.UTF_8);
        }
    }
}

（3）以下解析文件方式（本地支持，服务器不支持）

Resource resource = new ClassPathResource("data.txt");
File f = resource.getFile();
String st = FileUtils.readFileToString(f,Charset.defaultCharset());