如何解决我收到java.util.MissingFormatArgumentException:java中的格式说明符'%s'错误
我正在获取java.lang.RuntimeException:
java.util.MissingFormatArgumentException: Format specifier '%s' error in Java below is my stacktrace:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transformToListClass': Invocation of init method failed; nested exception is java.lang.RuntimeException: java.util.MissingFormatArgumentException: Format specifier '%s'
Caused by: java.lang.RuntimeException: java.util.MissingFormatArgumentException: Format specifier '%s'
Caused by: java.util.MissingFormatArgumentException: Format specifier '%s'
我正在传递以下JSON文件:
{
"EcrionIntegration": {
"HelloWord": "Hello World"
}
}
使用以下方法:
@PostConstruct
public ResponseEntity<InputStreamResource> tranform() {
try {
JSONParser parser = new JSONParser();
//Use JSONObject for simple JSON and JSONArray for array of JSON.
JSONObject data = (JSONObject) parser.parse(new FileReader("C:\\Liver\\code\\HELLO_WORLD.json"));//path to the JSON file.
String payLoad = data.toString();
ImageDescriptor descriptor = ecrionService.generateImage(payLoad,"HELLO_WORLD");
log.info(String.format("%s generateImage Result: [%s] ",descriptor.getFileName(),descriptor.getFileUrl()));
System.out.print(descriptor.getFileName() + " " + descriptor.getFileUrl());
String fileName = "ecrionlList.PDF";
log.info(String.format("file name:",fileName));
System.out.print("file name:" + fileName);
descriptor.setFileName(fileName);
InputStreamResource streamResource = new InputStreamResource(descriptor.getInputStream());
return ResponseEntity.ok()
.contentType(MediaType.parseMediaType(MediaType.APPLICATION_PDF_VALUE))
.body(streamResource);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
}
依次将哪种方法传递给以下方法并发送给服务器:
public ImageDescriptor generateImage(String payLoad,String templateName) {
try {
ImageDescriptor descriptor = new ImageDescriptor();
String myEcrionUrl = "http://localhost:8013/v1/ecrion";
String ecrionURL = myEcrionUrl.concat(Constant.F_SLASH).concat(templateName);
log.info("payload" + payLoad);
ResponseEntity<Resource> responseEntity = restTemplate.exchange(
ecrionURL,HttpMethod.POST,ncbiService.getStringHttpEntityWithPayload(payLoad),Resource.class);
log.info(String.format("%s generateImage Result: [%s] ",responseEntity.getBody().getInputStream()));
descriptor.setInputStream(Objects.requireNonNull(responseEntity.getBody()).getInputStream());
convert(responseEntity.getBody().getInputStream(),"sherrr.pdf");
log.info("file is:"+ convert(responseEntity.getBody().getInputStream(),"sherrr.pdf"));
return descriptor;
} catch (IOException e) {
e.printStackTrace();
log.error(" generate image failed " + e.getMessage());
throw new RuntimeException(e);
}
}
解决方法
log.info(String.format("%s generateImage Result: [%s] ",responseEntity.getBody().getInputStream()));
此格式有两个%s,但您仅传递了一个参数。
,如documentation所示
String.format接受格式字符串和vararg或参数。如果查看格式化程序字符串documentation,可以看到在%
符号之后,有一堆参数可用于格式化字符串。特别是对于%s
,它的写法如下
's','S' general If the argument arg is null,then the result is "null". If arg implements Formattable,then arg.formatTo is invoked. Otherwise,the result is obtained by invoking arg.toString().
所以您得到的错误是因为您告诉格式化程序字符串将格式化2个参数,并且只传递了其中一个参数
log.info(String.format("%s generateImage Result: [%s] ",responseEntity.getBody().getInputStream()));
因此您只需删除第一个%s
即可:
log.info(String.format("generateImage Result: [%s] ",responseEntity.getBody().getInputStream()));
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