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java.io.FileNotFoundException:类路径资源,即使文件存在于src / main / resources中

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我在src / main / resources目录下有我的XML文件 . 我的 Spring 天代码看起来像

import java.io.IOException;
import java.util.concurrent.atomic.AtomicLong;

import com.google.common.base.Charsets;
import com.google.common.io.Files;
import org.springframework.core.io.ClassPathResource;
import org.springframework.integration.xml.transformer.XsltPayloadTransformer;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class BdeApplicationController {

    @GetMapping("/ping")
    @ResponseBody
    public String ping(@RequestParam(name="name", required=false, defaultValue="Stranger") String name) {
        return myFlow();
    }

    private String myFlow() {
        XsltPayloadTransformer transformer = getXsltTransformer();
        return transformer.transform(buildMessage(getXMLFileString())).toString();
    }

    private String getXMLFileString() {
        try {
            return Files.toString(new ClassPathResource("XML1.xml").getFile(), Charsets.UTF_8);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }

    private XsltPayloadTransformer getXsltTransformer() {
        return new XsltPayloadTransformer(new ClassPathResource("XSLT1.xsl"));
    }

    protected Message<?> buildMessage(Object payload) {
        return MessageBuilder.withPayload(payload).build();
    }
}

运行此代码时,我得到以下异常: -

java.io.FileNotFoundException:类路径资源[XML1.xml]无法解析为绝对文件路径,因为它不驻留在文件系统中:jar:file:/Users/user/Documents/project/target/bde-0.0 .1 SNAPSHOT.jar!/ BOOT-INF / classes中!/XML1.xml

你能建议我该如何解决这个问题?

1 回答

  • 3

    当您使用resource.getFile()时,您在文件系统中查找该文件,这就是为什么当您以jar形式运行时它不起作用 .

    尝试使用InputStream

    String data = "";
    ClassPathResource resource = new ClassPathResource("/XML1.xml");
    try {
        byte[] dataArr = FileCopyUtils.copyToByteArray(resource.getInputStream());
        data = new String(dataArr, StandardCharsets.UTF_8);
    } catch (IOException e) {
        // do whatever
    }
    

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