Question

我遇到使用jdbcTemplate更新表上记录的问题。

这是我的jsp表单

<form:form method="post" action="edit" modelAttribute="Student">
    <table>
        <tr>
            <td>id:</td>
            <td><form:input path="id" /></td>
        </tr>
        <tr>
            <td>Name:</td>
            <td><form:input path="name" /></td>
        </tr>
        <tr>
            <td>Salary:</td>
            <td><form:input path="salary" /></td>
        </tr>
        <tr>
            <td>Designation:</td>
            <td><form:input path="designation" /></td>
        </tr>
        <tr>
            <td><input type="submit" value="Update" /></td>
        </tr>
    </table>
</form:form>

StudentDaoImpl类中的

更新方法是：

 public void update(Student s) {

    String sql = "UPDATE Student set name=?, salary=?, designation=? where id=?";           
    jdbcTemplate.update(sql,s.getId(),s.getName(),s.getSalary(),s.getDesignation());

    System.out.println("-- Student list is Updated---" );

    int status =jdbcTemplate.update(sql);

    System.out.println("-------status---"+status);
}

更新的控制器方法是：

@RequestMapping(value =("/edit"), method= RequestMethod.POST)

public ModelAndView editStudent(@ModelAttribute("Student") Student student,BindingResult result, ModelMap map){

    @SuppressWarnings("resource")
    ApplicationContext ac = new ClassPathXmlApplicationContext("META-INF/applicationContext.xml");
     StudentDAO dao = (StudentDAO) ac.getBean("studentDao");        

    // map.addAttribute("id", student.getId());
     map.addAttribute("name", student.getName());
     map.addAttribute("salary", student.getSalary());
     map.addAttribute("designation", student.getDesignation());

     dao.save(student);


return new ModelAndView("redirect:/viewstudent");

}

我想在我的学生表上按id更新记录...我得到sql查询错误。我做错了什么？请建议。

使用Spring MVC + JDBC从表单数据输入更新表

0 个答案: