Question

我在使用Hibernate的Spring MVC应用程序中工作。

在JSP页面中，我有一个列出存储在数据库中的值的函数（当前所有的值）。

我编写了一个方法，其中列表仅限于JSP文件中传递的ID。我让HQL查询正常工作，所以我知道它是根据ID作为参数检索数据。

现在，我想在控制器中使用此方法。为此，我必须将ID参数传递给列表，因此在控制器端调用该函数，该函数将根据该ID检索列表。

不幸的是我不知道如何从JSP文件中传递参数。

JSP文件：

  <c:url var="addAction" value="/note/add" ></c:url>
<form:form action="${addAction}" commandName="notices">
    <table>
        <c:if test="${!empty notices.notetext}">
            <tr>
                <td>
                    <form:label path="noticesid">
                        <spring:message text="noticesid"/>
                    </form:label>
                </td>
                <td>
                    <form:input path="noticesid" readonly="true" size="8"  disabled="true" />
                    <form:hidden path="noticesid" />
                </td>
            </tr>
        </c:if>
        <tr>
            <td>
                <form:label path="notetext">
                    <spring:message text="notetext"/>
                </form:label>
            </td>
            <td>
                <form:input path="notetext"  />
            </td>
        </tr>
        <tr>
            <td>
                <form:label path="notetag" >
                    <spring:message text="notetag"/>
                </form:label>
            </td>
            <td>
                <form:input path="notetag"/>
            </td>
        </tr>
        <tr>
            <td>
                <form:label path="notecolor">
                    <spring:message text="notecolor"/>
                </form:label>
            </td>
            <td>
                <form:input path="notecolor" />
            </td>
        </tr>

        <tr>
            <td>
                <form:label path="canvasid">
                    <spring:message text="canvasid"/>
                </form:label>
            </td>
            <td>
                <form:input path="canvasid" />
            </td>
        </tr>

        <tr>
            <td>
                <form:label path="sectionid">
                    <spring:message text="sectionid"/>
                </form:label>
            </td>
            <td>
                <form:input path="sectionid"  />
            </td>
        </tr>

        <tr>
            <td>
                <form:label path="canvasnName">
                    <spring:message text="canvasnName"/>
                </form:label>
            </td>
            <td>
                <form:input path="canvasnName"  />
            </td>
        </tr>


        <tr>
            <td colspan="2">
                <c:if test="${!empty notices.noticesid}">
                    <input type="submit"
                           value="<spring:message text="Edit note"/>" />
                </c:if>
                <c:if test="${empty notices.notetext}">
                    <input type="submit"
                           value="<spring:message text="Add note"/>" />
                </c:if>
            </td>
        </tr>
    </table>
</form:form>
<br>
<h3>Notes List</h3>

<c:url var="listAction" value="/note/list/2323" ></c:url>
<c:if test="${!empty notices.noticesid}">
    <table class="tg">
        <tr>
            <th width="80">Notes ID</th>
            <th width="120">Notes text</th>
            <th width="120">Note Tag</th>
            <th width="120">Note color</th>
            <th width="120">Note section</th>
            <th width="120">Canvas id</th>
            <th width="120">Canvas name</th>
            <th width="120">Other id</th>
            <th width="60">Edit</th>
            <th width="60">Delete</th>
        </tr>
        <c:forEach items="${listNotes}" var="notices">
            <tr>
                <td>${notices.noticesid}</td>
                <td>${notices.notetext}</td>
                <td>${notices.notetag}</td>
                <td>${notices.notecolor}</td>
                <td>${notices.sectionid}</td>
                <td>${notices.canvasid}</td>
                <td>${notices.canvasnName}</td>
                <td>${notices.personid}</td>
                <td><a href="<c:url value='/editnote/${notices.noticesid}' />" >Edit</a></td>
                <td><a href="<c:url value='/removenote/${notices.noticesid}' />" >Delete</a></td>
            </tr>
        </c:forEach>
    </table>
</c:if>

带列表功能的控制器文件：

@RequestMapping(value = "/note/list/{id}", method=RequestMethod.GET)
    public String listNotes(@PathVariable int id,Model model) {
        Person person = personService.getCurrentlyAuthenticatedUser();
        this.setSectionid(id);
        model.addAttribute("person", new Person());
        model.addAttribute("listPersons", this.personService.listPersons());
       model.addAttribute("listNotes",this.notesService.listNotesBySectionId(id,person));
        return "note";
    }

@RequestMapping(value= "/note/add")
    public String addNote(@ModelAttribute("notices") Notes p,Model model) {
        Person person = personService.getCurrentlyAuthenticatedUser();
        model.addAttribute("listNotes",this.notesService.listNotes());

        int id = getSectionid();
        System.out.println("Section id is"+id);
         model.addAttribute("listNotes",this.notesService.listNotesBySectionId(id,person));
        this.notesService.addNote(p, person);
        return "note";
    }

我试着抬头看网，但我不知道我要找的是什么，所以很难过。任何帮助都会很好。谢谢。

Answer 1

使用@RequestParam将参数传递给控制器处理程序方法。在jsp中，您的表单应具有name = "id"的输入字段，如下所示：

<input type="text" name="id" />
<input type="submit" />

然后在您的控制器中，您的处理程序方法应如下所示：

@RequestMapping("listNotes")
public String listNotes(@RequestParam("id") int id) {
    Person person = personService.getCurrentlyAuthenticatedUser();
    model.addAttribute("person", new Person());
    model.addAttribute("listPersons", this.personService.listPersons());
    model.addAttribute("listNotes", this.notesService.listNotesBySectionId(id, person));
    return "note";
}

请同时参考这些答案和教程：

Answer 2

你的控制器方法应该是这样的：

@RequestMapping(value = " /<your mapping>/{id}", method=RequestMethod.GET)
public String listNotes(@PathVariable("id")int id,Model model) {
    Person person = personService.getCurrentlyAuthenticatedUser();
    int id = 2323;  // Currently passing static values for testing
    model.addAttribute("person", new Person());
    model.addAttribute("listPersons", this.personService.listPersons());
    model.addAttribute("listNotes",this.notesService.listNotesBySectionId(id,person));
    return "note";
}

在代码中使用id，从JSP调用控制器方法：

/{your mapping}/{your id}

<强>更新

将您的jsp代码更改为：

<c:forEach items="${listNotes}" var="notices" varStatus="status">
    <tr>
        <td>${notices.noticesid}</td>
        <td>${notices.notetext}</td>
        <td>${notices.notetag}</td>
        <td>${notices.notecolor}</td>
        <td>${notices.sectionid}</td>
        <td>${notices.canvasid}</td>
        <td>${notices.canvasnName}</td>
        <td>${notices.personid}</td>
        <td><a href="<c:url value='/editnote/${listNotes[status.index].noticesid}' />" >Edit</a></td>
        <td><a href="<c:url value='/removenote/${listNotes[status.index].noticesid}' />" >Delete</a></td>
    </tr>
</c:forEach>

将参数从jsp传递给Spring Controller方法

2 个答案: