The difference between response and request when returning

The difference between response and request when returning;

 

response: directly print the return page

response.setContentType("text/html;charset=utf-8");

 String str = JSONUtils.valueToString(JSONObject.fromObject(new JsonMsg("-1", "Failed to negotiate deal",ARTNFLAG,CNT_KEY)));

    response.getWriter().write(str);

    response.getWriter().flush();

    return null;

 

 

request: similar to model's setAttribute();

 

==========================================================

 

Garbled code processing:

make request jsp

parent.location.href="/web/conObj/buyDetail.do?txt_conobj_key="+objKey+"&txt_contrade_kind="+CONTRADE_KIND+"&pick_types=A&jianjibuynum=0&order_prices="+

orderPrice+"&cdListKeyArrayFront="+""+"&buyNum="+chatNum+"&ARTNFLAG="+ret.ARTNFLAG+"&CNT_KEY="+ret.CNT_KEY+"&msg="+encodeURIComponent(ret.msg);

At this time, it is garbled when it is sent to the background (è´§ç‰©å ¯è´ä¹°é‡ ä¸ è¶³!), and the browser address bar is normal: (The amount of goods available for purchase is insufficient!)

 

Backstage:

方法1 String MSG2 =new String(msg.getBytes("ISO-8859-1"), "UTF-8");

After arriving here, it becomes normal (the amount of goods available for purchase is insufficient!)

model.addAttribute("errorInfo", MSG2);

 

Method 2

 

String MSG2 =new String(msg.getBytes("ISO-8859-1"), "UTF-8");

this.request.setCharacterEncoding("UTF-8");

this.request.setAttribute("errorInfo", MSG2);

 

 

Receive request jsp:

Purchase failed: ${errorInfo }