如何在onchange for Primefaces fileupload上捕获错误/验证错误

<p:fileUpload id="fileUpload" mode="advanced" auto="true" onchange="handleFileUpload()" />

function handleFileUpload() {
  var fileUpload = document.getElementById('form:fileUpload'); // 替换'form:fileUpload'为你的fileupload组件的ID
  var files = fileUpload.files;
  
  for (var i = 0; i < files.length; i++) {
    var file = files[i];
    
    if (!file.type.match('image.*')) {
      // 捕获文件类型错误
      console.log('只能上传图片文件');
    }
    
    if (file.size > 1024 * 1024) {
      // 捕获文件大小错误
      console.log('文件大小不能超过1MB');
    }
    
    // 其他验证逻辑...
  }
}

function handleFileUpload() {
  var fileUpload = document.getElementById('form:fileUpload'); // 替换'form:fileUpload'为你的fileupload组件的ID
  var files = fileUpload.files;
  
  for (var i = 0; i < files.length; i++) {
    var file = files[i];
    
    if (!file.type.match('image.*')) {
      // 捕获文件类型错误
      PF('growl').show([{severity: 'error', summary: '错误', detail: '只能上传图片文件'}]);
    }
    
    if (file.size > 1024 * 1024) {
      // 捕获文件大小错误
      PF('growl').show([{severity: 'error', summary: '错误', detail: '文件大小不能超过1MB'}]);
    }
    
    // 其他验证逻辑...
  }
}