jsp中String generateTestString(String level)String报错怎么办
时间: 2024-06-08 11:09:03 浏览: 102
这个错误信息比较简单,意思是在 `generateTestString` 方法中缺少了一个括号。你需要在方法声明和结束的地方加上括号,如下所示:
```
String generateTestString(String level) {
// 方法体
return testString;
}
```
如果你已经有了括号,那么可能是其他的语法错误导致的,你需要检查方法中的代码是否有语法问题。
相关问题
jsp中String generateTestString(String level)
这段代码的功能是生成一个测试字符串,该字符串的内容和长度由参数 level 决定。
具体实现可以根据不同的 level 参数值生成不同的字符串。例如,如果 level 为 "easy",可以生成一些简单的字符串,包含一些常见的英文单词和符号;如果 level 为 "hard",可以生成一些复杂的字符串,包含较多的数字、特殊字符和随机组合的单词等等。
代码改错:@WebServlet("/update_teacher") public class update_teacher extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); response.setCharacterEncoding("utf-8"); request.setCharacterEncoding("utf-8"); PrintWriter out = response.getWriter(); HttpSession session = request.getSession(); TeacherDao teacherD = new TeacherDao(); String uid = request.getParameter("uid"); String name = request.getParameter("name"); String sex = request.getParameter("sex"); String email = request.getParameter("email"); String password = request.getParameter("password"); try { Teacher teacher = teacherD.updateTeacher(uid, name, sex, email, password); session.setAttribute("info", teacher); out.print("<script>alert(\"保存成功!\");location.href = \"teacher/personal.jsp\";</script>"); } catch (Exception e) { out.print(e); } } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } }
这段代码看起来没有明显的错误,但是建议做一些改进:
1. 类名应该以大写字母开头,所以建议将类名 `update_teacher` 改为 `UpdateTeacher`。
2. 在 `catch` 块中,如果出现异常应该将信息打印到日志中而不是直接输出到页面,因为这样可以避免暴露敏感信息。
3. 如果更新教师信息失败,应该给出友好的提示信息。
下面是改进后的代码:
```
@WebServlet("/update_teacher")
public class UpdateTeacher extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
HttpSession session = request.getSession();
TeacherDao teacherDao = new TeacherDao();
String uid = request.getParameter("uid");
String name = request.getParameter("name");
String sex = request.getParameter("sex");
String email = request.getParameter("email");
String password = request.getParameter("password");
try {
Teacher teacher = teacherDao.updateTeacher(uid, name, sex, email, password);
session.setAttribute("info", teacher);
out.print("<script>alert(\"保存成功!\");location.href = \"teacher/personal.jsp\";</script>");
} catch (Exception e) {
Logger.getLogger(UpdateTeacher.class.getName()).log(Level.SEVERE, null, e);
out.print("<script>alert(\"保存失败,请稍后重试!\");location.href = \"teacher/personal.jsp\";</script>");
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
```