Java调用存储过程出错,不知道是那里错了,帮帮忙,谢谢

[pangxu100]

private CallableStatement cstmt;
public boolean addMemberBook(MemberBook memberbook) throws DBException{
DBManager manager=null;
String proc="{call bookid(?,?,?,?,?,?,?)}";
try {
manager=new DBManager();
boolean flage=manager.updateProc(proc);
//这里出错,说是说是空指针异常,实在是搞不明白啊!
cstmt.setString(1, memberbook.getMemberName());
cstmt.setString(2, memberbook.getMemberBookID());
cstmt.setString(3, memberbook.getMemberBookName());
cstmt.setFloat(4, memberbook.getMemberBookPrice());
cstmt.setInt(5, memberbook.getMemberBookNumber());
cstmt.setString(6, memberbook.getMemberBookUnit());
cstmt.setFloat(7, memberbook.getMemberBookMoney());
cstmt.execute();
if (flage==true) {
return true;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}

[marco08]

不懂JAVA，帮顶