从jsp向servlet提交HTML表单数据失败

Question

我正在尝试将jsp上的表单中的数据提交给我的servlet，以在数据库中进一步处理它。

表格如下：

<form id="example" name="example" class="normalForm1" action="example" method="Post">
        <input type="hidden" name="do_form" value="doTask">
        <input type="hidden" name="trial0" id="trial0">
<br/><input id="nextPage" type="submit"  value="Continue" hidden></form>

“ trial1”输入中存储的数据如下：

document.getElementById("trial0").value = [1,1,1,"word1|word2|word3|word4|word5",1,99]

在服务器端，此代码获取数据：

String trial0 = req.getParameter("trial0");

在服务器日志中，出现以下异常：

 23-Apr-2020 12:22:05.100 INFORMATION [https-jsse-nio-8443-exec-56] org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
 Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
    java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230
        at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:416)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:260)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

有趣的是，有时提交工作不会引发异常，有时确实会引发异常（看来这是随机的）。

我对任何想法都很高兴。

最诚挚的祝福

Answer 1

您正在尝试将数组分配给字符串变量。

代替做

document.getElementById("trial0").value = JSON.stringify([1,1,1,"word1|word2|word3|word4|word5",1,99]);