jsp中调用javabean.我估计是接口出错拉,可以这样调用吗?在线等!

Question

构造函数是私有的,不能在JSP中创建StringUtil的对象将StringUtil类用page指令导入后
<%=StringUtil.combineStringArray(test,",")%>

Answer 1

<jsp:useBean id="StringUtil" class="test.StringUtil" scope="page"/><% String[] test={"weicheng","gaoji","xiaomei","bobo"};%>
  the output is: <%=StringUtil.combineStringArray(test,",")%>
楼上说的是这个意思吗?
还是和原来一样提示错误!java.lang.InstantiationException: `test.StringUtil' has no public zero-arg
constructor

Answer 2

.........构造函数是私有的,不能用<jsp:useBean>加上
<%@ page import= "test.StringUtil"%>

Answer 3

<%@ page import= "test.StringUtil"%>
<% String[] test={"weicheng","gaoji","xiaomei","bobo"};%>
  the output is: <%=StringUtil.combineStringArray(test,",")%>

Answer 4

或者将StringUtil的构造函数改成public