ajaxSubmit提交后，success中返回的data转换json失败

response.setContentType("text/plain");
  PrintWriter out = response.getWriter();
  out.print("{\"success\":" + success + "}");

需要将

response.setContentType("text/plain"); 

修改为

response.setContentType("text/html");

解决。

转载于:https://my.oschina.net/OriginLeon/blog/616421