从XMLHttpRequest responseText获取纯文本

Question

    xmlhttp=new XMLHttpRequest();
    xmlhttp.open('POST', 'getMessage.do', false);
    xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xmlhttp.send();
    alert(xmlhttp.responseText);

    <action name="getMessage" class="SampleAction" method="getMessage"/>

    public String getMessage() {
    String msg = null;
    HttpSession hSession = this.request.getSession(false);
    if(null != hSession) {
        if(null != hSession.getAttribute("user")) {
            User user = (User) hSession.getAttribute("user");
            if(null != user.account) {
                msg =  user.account.getMessage(); //Sample message
            }
        }
    }
    return msg;
}

当我打印响应文本（使用alert）时，它会打印包含所有HTML信息的消息。实际消息以粗体突出显示

响应消息

HTML>标题>标题>Apache Tomcat/5.0.28-错误报告/标题>样式>！--{font-family：Tahoma,Arial,Sans-serif；color：white；background-color:#525d76；font-size:22px；}H2{font-family：Tahoma,Arial,Sans-serif；color：white；background-color：#525d76；font-size：16px；}H3{font-family：Tahoma,Arial,Sans-serif；color：white；background-color：#525d76；font-size：14px；}正文{font-family：Tahoma,Arial,Sans-serif；color：black；background-color：white；}B{font-family：Tahoma,Arial,Sans-serif；color：white；background-color：#525d76；}P{font-family：Tahoma,Arial,Sans-serif；background：white；color：black；font-size：12px；}A{color：black；}A.name{color：black；}HR{color:#525d76；}-->/style>/head>body>>HTTP Status 404-未为action com.Sample.sampleAction$$EnhancerByCglib$$69B4E30E和结果示例消息定义结果HR size=“1”noshade=“noshade”>P>b>type/b>

Answer 1

做这件事的方法是这样的…

AJAX调用

var xmlhttp;
if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else { // code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
 alert(xmlhttp.responseText);
}
}
xmlhttp.open("POST", "URL");
xmlhttp.send();

行动

public String execute() throws Exception {
      try{
            PrintWriter outWriter = null;
            StringBuffer msg= new StringBuffer("");
            HttpServletResponse httpResponse = ServletActionContext.getResponse();
            try {
                outWriter = httpResponse.getWriter();
                                        msg.append("String to be sent to View");
                    }

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            finally{

                if(outWriter!=null){
                    httpResponse.setContentType("text/html");
                    outWriter.println(msg.toString());
                    outWriter.flush();
                    outWriter.close();
                }
            }

        }catch (Exception e) {
            throw new Exception(e);
        }
        return null;
        }

<action name="MYActionName" class="MYActionNameBean"    method="execute">
            <result type="stream">
                    <param name="contentType">text/html</param>
                    <param name="inputName">inputStream</param>
            </result>
        </action>