Dorado7文件上传 解决HttpServletResponse返回值中文乱码的问题

// 解决HttpServletResponse返回值中文乱码的问题
res.setCharacterEncoding("utf-8");

String returnValAll = "";

returnValAll += idCard + "学员查询失败" + "|";

			// 返回
			String result = "{result:'success'," +
					"returnVal1:'" + totalNum + "'," +
					"returnVal2:'" + successNum + "'," +
					"returnVal3:'" + (totalNum - successNum) + "'," +
					"returnVal4:'" + returnValAll + "'" +
					"}";
			res.getWriter().write(result);

问题现象：

解决后：