小编典典

获取Exception-java.lang.IllegalStateException:此响应已调用getOutputStream()

jsp

我是jsp的新手,当我尝试通过名为cId和passWord的某些参数调用jsp页面时,出现此错误,下面给出了我一直在尝试的代码,我已经遇到了相同的错误,谷歌搜索,但仍然出现相同的问题。代码是:

<body>
        <%

        String cidMessage = "cID";
        String passEncrypted = "passWord";
        System.out.println("CID ISSSSSSSSSSSS"+cId);
        if ((cId.equals(cidMessage)) && (passWord.equals(passEncrypted))) {
                        System.out.println("Validation Correct"+cId);
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            Date date = new Date();
            String time = sdf.format(date.getTime());
            String xmlOutput = "<smsreport>"
                    + "<date>" + time + "</date>"
                    + "<result>" + "SUCESS" + "</result>"
                    + "<msgid>" + currentTimeMillis() + "</msgid>"
                    + "<msgparts>" + "1" + "</msgparts>"
                    + "</smsreport>";

            try {
                byte[] contents = xmlOutput.getBytes();
                response.setContentType("text/xml");
                response.setContentLength(contents.length);
                response.getOutputStream().write(contents);
                response.getOutputStream().flush();
            } catch (Exception e) {
                throw new ServletException(e);
            }
        } else {
                           System.out.println("Validation Wrong"+cId);
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            Date date = new Date();
            String time = sdf.format(date.getTime());
            String xmlOutput = "<smsreport>"
                    + "<date>" + time + "</date>"
                    + "<result>ERROR</result>"
                    + "<msgid>" + "ErrorCode" + "</msgid>"
                    + "<msgparts>" + "ErrorMessage" + "</msgparts>"
                    + "</smsreport>";

            try {
                byte[] contents = xmlOutput.getBytes();
                response.setContentType("text/xml");
                response.setContentLength(contents.length);
                response.getOutputStream().write(contents);
                response.getOutputStream().flush();
            } catch (Exception e) {
                throw new ServletException(e);
            }

        }
    %>
</body>

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2020-06-08

共1个答案

小编典典

您不应该尝试在JSP中执行此操作。JSP将已经获得一个输出流以写入其输出。您需要使用servlet来返回XML。

当您调用response.getOutputStream时,它与JSP(将被编译为servlet的)已经获得输出流的事实相冲突。这就是为什么它导致IllegalStateException的原因。

2020-06-08