I am getting a java.util.MissingFormatArgumentException: Format specifier '%s' error in java

huangapple
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英文:

I am getting a java.util.MissingFormatArgumentException: Format specifier '%s' error in java

问题

我遇到了 java.lang.RuntimeException 异常：

  1. 在以下的 Java 代码中出现了 java.util.MissingFormatArgumentException 异常：

以下是我的堆栈跟踪：

  1. org.springframework.beans.factory.BeanCreationException: 在 bean 创建时出现错误 'transformToListClass'：初始化方法的调用失败；嵌套异常是 java.lang.RuntimeException: java.util.MissingFormatArgumentException: 格式说明符 '%s'

由于以下原因导致：

  1. java.lang.RuntimeException: java.util.MissingFormatArgumentException: 格式说明符 '%s'

原因是 java.util.MissingFormatArgumentException 异常：

  1. java.util.MissingFormatArgumentException: 格式说明符 '%s'

我正在传递以下 JSON 文件：

  1. {
  2. "EcrionIntegration": {
  3.   "HelloWord": "Hello World"
  4. }
  5. }

给以下方法：

  1. @PostConstruct
  2. public ResponseEntity<InputStreamResource> tranform() {
  3.     try {
  5.         JSONParser parser = new JSONParser();
  6.         // 使用 JSONObject 处理简单的 JSON，使用 JSONArray 处理 JSON 数组。
  7.         JSONObject data = (JSONObject) parser.parse(new FileReader("C:\\Liver\\code\\HELLO_WORLD.json")); // JSON 文件路径。
  9.         String payLoad = data.toString();
  12.         ImageDescriptor descriptor = ecrionService.generateImage(payLoad, "HELLO_WORLD");
  14.         log.info(String.format("%s generateImage 结果：[%s] ", descriptor.getFileName(), descriptor.getFileUrl()));
  15.         System.out.print(descriptor.getFileName() + " " + descriptor.getFileUrl());
  17.         String fileName = "ecrionlList.PDF";
  18.         log.info(String.format("文件名：%s", fileName));
  19.         System.out.print("文件名：" + fileName);
  20.         descriptor.setFileName(fileName);
  22.         InputStreamResource streamResource = new InputStreamResource(descriptor.getInputStream());
  23.         return ResponseEntity.ok()
  24.                 .contentType(MediaType.parseMediaType(MediaType.APPLICATION_PDF_VALUE))
  25.                 .body(streamResource);
  27.     } catch (Exception ex) {
  28.         throw new RuntimeException(ex);
  29.     }
  30. }

}

然后将其传递给以下方法并发送到服务器：

  1. public ImageDescriptor generateImage(String payLoad, String templateName) {
  2.     try {
  3.         ImageDescriptor descriptor = new ImageDescriptor();
  5.         String myEcrionUrl = "http://localhost:8013/v1/ecrion";
  6.         String ecrionURL = myEcrionUrl.concat(Constant.F_SLASH).concat(templateName);
  8.         log.info("负载：" + payLoad);
  10.         ResponseEntity<Resource> responseEntity = restTemplate.exchange(
  11.                 ecrionURL,
  12.                 HttpMethod.POST,
  13.                 ncbiService.getStringHttpEntityWithPayload(payLoad),
  14.                 Resource.class);
  15.         log.info(String.format("%s generateImage 结果：[%s] ", descriptor.getFileName(), responseEntity.getBody().getInputStream()));
  16.         descriptor.setInputStream(Objects.requireNonNull(responseEntity.getBody()).getInputStream());
  18.         convert(responseEntity.getBody().getInputStream(), "sherrr.pdf");
  20.         log.info("文件是：" + convert(responseEntity.getBody().getInputStream(), "sherrr.pdf"));
  22.         return descriptor;
  23.     } catch (IOException e) {
  24.         e.printStackTrace();
  25.         log.error("生成图像失败：" + e.getMessage());
  26.         throw new RuntimeException(e);
  27.     }
  28. }
英文:

I am getting a java.lang.RuntimeException:

  1. java.util.MissingFormatArgumentException: Format specifier &#39;%s&#39; error in Java below is my stacktrace:
  3. org.springframework.beans.factory.BeanCreationException: Error creating bean with name &#39;transformToListClass&#39;: Invocation of init method failed; nested exception is java.lang.RuntimeException: java.util.MissingFormatArgumentException: Format specifier &#39;%s&#39;
  5. Caused by: java.lang.RuntimeException: java.util.MissingFormatArgumentException: Format specifier &#39;%s&#39;
  7. Caused by: java.util.MissingFormatArgumentException: Format specifier &#39;%s&#39;

I am passing the below JSON file:

  1. {
  2. &quot;EcrionIntegration&quot;: {
  3.   &quot;HelloWord&quot;: &quot;Hello World&quot;
  4. }
  5. }

To the following method:

  1. @PostConstruct
  2. public ResponseEntity&lt;InputStreamResource&gt; tranform() {
  3.     try {
  5.         JSONParser parser = new JSONParser();
  6. //Use JSONObject for simple JSON and JSONArray for array of JSON.
  7.         JSONObject data = (JSONObject) parser.parse(new FileReader(&quot;C:\\Liver\\code\\HELLO_WORLD.json&quot;));//path to the JSON file.
  9.         String payLoad = data.toString();
  12.         ImageDescriptor descriptor = ecrionService.generateImage(payLoad, &quot;HELLO_WORLD&quot;);
  14.         log.info(String.format(&quot;%s generateImage Result: [%s] &quot;, descriptor.getFileName(), descriptor.getFileUrl()));
  15.         System.out.print(descriptor.getFileName() + &quot; &quot; + descriptor.getFileUrl());
  17.         String fileName = &quot;ecrionlList.PDF&quot;;
  18.         log.info(String.format(&quot;file name:&quot;, fileName));
  19.         System.out.print(&quot;file name:&quot; + fileName);
  20.         descriptor.setFileName(fileName);
  22.         InputStreamResource streamResource = new InputStreamResource(descriptor.getInputStream());
  23.         return ResponseEntity.ok()
  24.                 .contentType(MediaType.parseMediaType(MediaType.APPLICATION_PDF_VALUE))
  25.                 .body(streamResource);
  27.     } catch (Exception ex) {
  28.         throw new RuntimeException(ex);
  29.     }
  30. }

}

Which is in turn passed to the following method and send to the server:

  1. public ImageDescriptor generateImage(String payLoad, String templateName) {
  2.     try {
  3.         ImageDescriptor descriptor = new ImageDescriptor();
  5.         String myEcrionUrl = &quot;http://localhost:8013/v1/ecrion&quot;;
  6.       String ecrionURL = myEcrionUrl.concat(Constant.F_SLASH).concat(templateName);
  10.         log.info(&quot;payload&quot; + payLoad);
  12.         ResponseEntity&lt;Resource&gt; responseEntity = restTemplate.exchange(
  13.                 ecrionURL,
  14.                 HttpMethod.POST,
  15.                 ncbiService.getStringHttpEntityWithPayload(payLoad),
  16.                 Resource.class);
  17.       log.info(String.format(&quot;%s generateImage Result: [%s] &quot;, responseEntity.getBody().getInputStream()));
  18.         descriptor.setInputStream(Objects.requireNonNull(responseEntity.getBody()).getInputStream());
  20.         convert(responseEntity.getBody().getInputStream(), &quot;sherrr.pdf&quot;);
  22.         log.info(&quot;file is:&quot;+ convert(responseEntity.getBody().getInputStream(), &quot;sherrr.pdf&quot;));
  24.         return descriptor;
  25.     } catch (IOException e) {
  26.         e.printStackTrace();
  27.         log.error(&quot; generate image failed &quot; + e.getMessage());
  28.         throw new RuntimeException(e);
  29.     }
  34.  }

答案1

得分: 2

  1. log.info(String.format("%s 生成图像结果: [%s] ", responseEntity.getBody().getInputStream()));

这个格式有两个 %s，但你只传了一个参数。

英文: 
  1. log.info(String.format(&quot;%s generateImage Result: [%s] &quot;, responseEntity.getBody().getInputStream()));

This format has two %s, but you only passed one argument.

答案2

得分: 0

如你可以从文档中看到，
String.format接受格式字符串和vararg参数。如果你查看格式化字符串的文档，你可以看到在百分号（%）后面有一系列的参数，可以用来格式化字符串。特别是对于%s，它的说明如下：

  1. 's', 'S'  通用  如果参数arg为null，则结果为“null”。如果arg实现了Formattable接口，则会调用arg.formatTo方法。否则，通过调用arg.toString()来获得结果。

所以你之前遇到的错误是因为你告诉格式化字符串有2个参数将被格式化，但你只传递了其中一个：

  1. log.info(String.format("％s generateImage Result: [%s]", responseEntity.getBody().getInputStream()));

所以你只需移除第一个%s：

  1. log.info(String.format("generateImage Result: [%s]", responseEntity.getBody().getInputStream()));
英文:

As you can see by documentation
String.format accepts Format string and vararg or parameters. If you look at the formatter string documentation you can see that after % sign there are a bunch of parameters which can be used to format the string. Particularly for the %s it's written the following

  1. &#39;s&#39;, &#39;S&#39;	general	If the argument arg is null, then the result is &quot;null&quot;. If arg implements Formattable, then arg.formatTo is invoked. Otherwise, the result is obtained by invoking arg.toString().

So the error you were getting was because you were telling formatter string that 2 parameters will be formatted and you passed only one of it

  1. log.info(String.format(&quot;%s generateImage Result: [%s] &quot;, responseEntity.getBody().getInputStream()));

So you can just remove the first %s :

  1. log.info(String.format(&quot;generateImage Result: [%s] &quot;, responseEntity.getBody().getInputStream()));

huangapple
  • 本文由 发表于 2020年8月21日 12:49:37
  • 转载请务必保留本文链接：https://go.coder-hub.com/63516697.html
  • java
  • json
  • runtimeexception
  • spring-boot
  • spring-resttemplate
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