Question

使用spring MVC在JSP表单中呈现一对多关系时遇到问题。贝娄我给3个档案。这里是学生与商标之间的一对多关系。所以在添加和更新学生详细信息时如何在JSP中表示Mark set。实际上我在jsp页面写的是没有用的。另一件事我希望控制器中的单个对象在表单提交。

Student.hbm.xml

<hibernate-mapping>
<class name="net.startMVC.pojo.Student" table="student" catalog="spring_mvc_start" >
    <id name="studid" type="int" >
        <column name="studid" />
        <generator class="increment" />
    </id>
    <many-to-one name="address" class="net.startMVC.pojo.Address" lazy="false"  fetch="select">
        <column name="addressid" />
    </many-to-one>
    <property name="name" type="string">
        <column name="name" length="100" />
    </property>
    <property name="roleNo" type="java.lang.Integer">
        <column name="role_no" />
    </property>
    <property name="stream" type="string">
        <column name="stream" length="50" />
    </property>
    <list name="marks" table="mark" inverse="true" lazy="false" fetch="select">
        <key>
            <column name="studid" />
        </key>
         <list-index base="1" column="markid"/>
        <one-to-many class="net.startMVC.pojo.Mark" />
    </list>
</class>

Mark.hbm.xml

<hibernate-mapping>
<class name="net.startMVC.pojo.Mark" table="mark" catalog="spring_mvc_start">
    <id name="markid" type="int">
        <column name="markid" />
        <generator class="increment" />
    </id>
    <many-to-one name="student" class="net.startMVC.pojo.Student" fetch="select">
        <column name="studid" />
    </many-to-one>
    <property name="totalMark" type="java.lang.Integer">
        <column name="total_mark" />
    </property>
</class>

添加控制器方法

@RequestMapping("/addStudent")
public ModelAndView addStudent(Model model)
{
    System.out.println("comming controller");
    return new ModelAndView("addStudent", "command", new Student());
}

编辑控制器方法

@RequestMapping(value="/editStudent", method=RequestMethod.GET)
public ModelAndView editStudent(@RequestParam String studID,Model model)
{
    System.out.println("studID->"+studID);
    setStudent(helloMVCService.getOneStudentDetails(studID));
    return new ModelAndView("addStudent", "command", getStudent());
}

保存并更新控制器方法

@RequestMapping(value = "/addNewStudent", method = RequestMethod.POST)
public String addStudent(@ModelAttribute Student student,Model model) {
  helloMVCService.saveStudentData(student);      
  return "redirect:/hello";
}

addStudend.jsp

<form:form method="POST" action="addNewStudent">
<form:hidden path="studid"/>
<table>
<tr>
    <td><form:label path="name">Name</form:label></td>
    <td><form:input path="name" /></td>
</tr>
<tr>
    <td><form:label path="roleNo">Roll No</form:label></td>
    <td><form:input path="roleNo" /></td>
</tr>
<tr>
    <td><form:label path="stream">Stream</form:label></td>
    <td><form:input path="stream" /></td>
</tr>
 <tr>
    <td><form:label path="address.loc">Location</form:label></td>
    <td><form:input path="address.loc" /></td>
</tr>
  <tr>
    <td><form:label path="address.state">State</form:label></td>
    <td><form:input path="address.state" /></td>
</tr>
 <tr>
    <td><form:label path="address.country">Country</form:label></td>
    <td><form:input path="address.country" /></td>
</tr>
<c:forEach var="marks" varStatus="vs" items="${marks}">
<tr>
    <td><form:label path="marks[vs.index].totalMark">Mark</form:label></td>
    <td><form:input path="marks[vs.index].totalMark" /></td>
</tr> 
</c:forEach>
<tr>
    <td colspan="2">
        <input type="submit" value="Submit"/>
    </td>
</tr>
</table>  
</form:form>

如何在Spring MVC JSP表单中呈现一对多关系

0 个答案: