extjs中的ajax请求总是执行成功-ajaxrequestinextjsalwaysexecutessuccess

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You are sending JSON message with status code 200 which is considered as success. The fact that this JSON message contains some custom structure with an error message is not something that extjs is capable of knowing. You could either send a 500 HTTP status code from your server or simply use an if condition in your success handler like this:

您发送的JSON消息的状态代码为200，这被认为是成功的。这个JSON消息包含一些带有错误消息的自定义结构，这不是extjs能够知道的。您可以从服务器发送500个HTTP状态码，也可以在成功处理程序中使用if条件，如下所示:

success: function(my_response) {
   if (my_response.success) {
       alert('it worked!');
   } else {
       alert('oops, something went wrong: ' + my_response.errors.response);
   }
}

Also readapt the content type to what you are actually sending:

还可以将内容类型调整为实际发送的内容:

print "Content-Type: application/json\n\n";