Exception：java.lang.VerifyError：JVMVRFY012堆栈形状不一致；

Question

我们刚刚从IBM WebSphere7(Java 1.6）迁移到WebSphere9(Java 1.8）。我正面临长强制转换的问题，加载jsp时出现代码中断，下面的代码片段（这段代码是用jsp编写的）：

        long caseNum = 0L, empid = 0L;
        Long employeeId;


            employeeId = ((Long) request.getAttribute("EMPID") == null) ? 0L
                    : (Long) request.getAttribute("EMPID");
            empid = employeeId.longValue();

下面是堆栈串,

Exception：java.lang.VerifyError：JVMVRFY012堆栈形状不一致；class=com/ibm/_jsp/_tmtsstasksummary,method=_jspservice(ljavax/_jsp/_tmtsstasksummary._jspservice(ljavax/servlet/http/httpservletrequest；ljavax/servlet/http/httpservletrequest；ljavax/servlet/httpservletresponse；）V@13805:JBifnull原因：Type top（当前帧,locals[120])不能分配给“java/lang/long”（堆栈映射,locals[120])当前帧：bci:@13805ava/util/map“,integer,”java/lang/string“,integer,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/object“,”java/lang/object“,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/string“,”java/lang/string“

有没有人能提出任何解决办法。我读过关于使用splitverify的文章，但它与AspectJ一起工作。还有其他的解决办法吗？

Answer 1

在我看来

>

您正在尝试类型化一个null对象，该对象将引发错误或

long caseNum = 0L, empid = 0L;
Long employeeId;


    employeeId = (request.getAttribute("EMPID") == null) ? 0L
            : (Long) request.getAttribute("EMPID");
    empid = employeeId.longValue();

您正在尝试将字符串或任何其他对象转换为long。如果是字符串，则使用long.parselong（）

    employeeId = (request.getAttribute("EMPID") == null) ? 0L
            : Long.parseLong(request.getAttribute("EMPID"));
    empid = employeeId.longValue();