Spring mvc 返回JSON

最新推荐文章于 2025-04-07 15:57:52 发布

原创最新推荐文章于 2025-04-07 15:57:52 发布 · 102 阅读

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本文介绍了一段Java代码，该代码用于更新合同申请的标题，并将新的标题同步到所有相关的目标对象中。同时，文章展示了如何使用Ajax进行异步请求以获取更新后的合同编号。

public ModelAndView updateContractTitle (HttpServletRequest request,
    HttpServletResponse response) throws Exception {
        ModelAndView mav = new ModelAndView();
        long applyId = Long.valueOf(request.getParameter("applyId"));
        AbstractApply apply = applyDao.getApplyById(applyId);
        apply.setApplyTitle(request.getParameter("contractTitle"));
        for(Object t : apply.getApplyTarget()){
            AbstractApplyTarget c = (AbstractApplyTarget) t;
            c.setTitle(apply.getApplyTitle());
        }
        applyDao.merge(apply);//以上是业务逻辑

        //开始返回
        MappingJacksonJsonView view = new MappingJacksonJsonView();
        Map attributes = new HashMap();
        attributes.put("success", Boolean.TRUE);

attributes.put("contractNo", "contractNo");

        view.setAttributesMap(attributes);
        mav.setView(view);
        return mav;
    }

var URL = "approve.do?action=approveC"

$.ajax({

type:"POST",

url:URL,

data:null,

success:function(msg){

alert(msg.contractNo);//取到返回的“ contractNo ”值

error:function(msg){

}

});