AJAX传输乱码解决办法

来源：互联网发布：大数据技术包括哪些编辑：程序博客网时间：2024/05/11 15:50

页面用AJAX传递数据时

function login(uname,pwd) {
            var XMLHttpRequestObject = false;
            if(window.XMLHttpRequest) {
                XMLHttpRequestObject = new XMLHttpRequest();
            } else {
                if(window.ActiveXObject) {
                    XMLHttpRequestObject = new ActiveObject("Microsoft.XMLHTTP");
                }
            }
            var uri = "uname=" + uname.value + "&pwd=" + pwd.value;
            var url = "login.do?method=login";
            uri = encodeURI(encodeURI(uri));
            if(XMLHttpRequestObject) {
                XMLHttpRequestObject.open("POST",url,true);
                XMLHttpRequestObject.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
                XMLHttpRequestObject.onreadystatechange = function () {
                    if(XMLHttpRequestObject.readyState == 4) {
                        if(XMLHttpRequestObject.status == 200) {
                            var text = XMLHttpRequestObject.responseText;
                            if(text == "error") {
                                alert("输入的用户名或密码错误，请重新输入");
                                uname.value="";
                                pwd.value="";
                            }else {
                                alert("欢迎回来");
                            }
                        }
                    }
                };
                XMLHttpRequestObject.send(uri);
            }
        }

JAVA Action里处理代码

public ActionForward login(ActionMapping mapping, ActionForm form,
            HttpServletRequest req, HttpServletResponse res) throws Exception {
        String uname = URLDecoder.decode(req.getParameter("uname"),"UTF-8");
        String pwd = URLDecoder.decode(req.getParameter("pwd"),"UTF-8");
        pwd = md5.getMD5ofStr(pwd);
        UserVo userVo = new UserVo(uname, pwd);
        UserVo findVo = (UserVo)loginServiceImpl.findUserInfo(userVo);
        String message = null;
        if(findVo != null) {
            message = "sucess";
        }else {
            message = "error";
        }   
        res.setContentType("text/xml;charset=UTF-8");
        res.setHeader("Cache-Control", "no-cache");
        PrintWriter pw = res.getWriter();
        pw.write(message);
        log.info("message==" + message);
        pw.close();
        return null;
    }

uri = encodeURI(encodeURI(uri));这里两次编码是为了解决中文乱码的问题，因为script的编码和java的解码不对应，会导致乱码，所有这里要两次编码
最后在Action里接收数据时一次解码，URLDecoder.decode(req.getParameter("uname"),"UTF-8");这样得到的是正常的正文！