1.异步提交
http://www.w3school.com.cn/jquery/ajax_post.asp
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表单enctype="multipart/form-data"
2.提交的代码
data = {"clazzName":addClazzName};
jQuery.post(url,data,pback);
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后台代码:
/**
* 查看是否存在该班级
* @param model
* @param request
* @return
*/
@RequestMapping(value={"/isAdded",""})
public void isClazzAdded(ClazzDTO clazzDTO,Model model,HttpServletRequest request,HttpServletResponse response){
//编码
response.setCharacterEncoding("utf-8");
//班级名
String clazzName = clazzDTO.getClazzName();
PrintWriter printWriter = null;
//根据班级名查询班级
Clazz clazz = this.clazzService.findClazzByName(clazzName);
try {
printWriter = response.getWriter();
//如果没有该班级
if(null == clazz){
clazz = new Clazz();
clazz.setClazzName(clazzName);
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