Question

我的项目基于spring boot，Thymeleaf，mysql，html和Jquery。

我试图将输入的String数据发布到@RestController页面，但它收到的是EMPTY，这意味着null。这是我的代码详细信息

HTML

<form id="addchargesformid" method="post" th:action="@{/addcharge}">  
 <!-- input box add -->
 <div class="form-group">
    <label for="chargeName">Add New Charge*</label> 
    <input th:id="chargeName" th:name="chargeName" th:value="${chargeName}" type="text" class="form-control" placeholder="Ex : Maintanence charge">
</div>
<br/>
<button th:type="submit" id="addchargebtnid" class="btn btn-info">Add New Charge</button>
</form>

@RestController

/*To Add Individual charges into list*/
@PostMapping(value="/addcharge")
public ModelAndView doAddCharge(@ModelAttribute String chargeName)
{
    ModelAndView respondResult = new ModelAndView();
    try {
        String result  = serAssignCharges.doAddCharges(chargeName);
        if(result.equals("success"))
        {
            doGetChargesList();
        }
        else {
            respondResult.addObject("warning","sorry! failed to add");
        }

    } catch (Exception e) {
        // TODO: handle exception
    }
    return respondResult;
}

请帮我解决这个问题......

Answer 1

由于您没有从该表单到模型类的任何绑定活动，并且您只想传递字符串，请尝试使用@RequestParam而不是@ModelAttribute：

public ModelAndView doAddCharge(@RequestParam("chargeName") String chargeName)

Answer 2

我进行了代码更改....在HTML中添加

个：对象= “$ {chargeName}”

在表单中，添加输入标记

名称= “chargeName”

完整代码

 <form id="addchargesformid" method="post" th:action="@{/addcharge}" th:object="${chargeName}">  
     <!-- input box add -->
     <div class="form-group">
        <label for="chargeNameid">Add New Charge</label> 
        <input id="chargeNameid" name="chargeName" type="text" class="form-control" placeholder="Ex : Maintanence charge">
    </div>
    <br/>
    <button th:type="submit" id="addchargebtnid" class="btn btn-info">Add New Charge</button>
    </form>

<强> @RestController

将@ModelAttribute更改为@RequestParam

/*To Add Individual charges into list*/
    @PostMapping(value="/addcharge")
    public ModelAndView doAddCharge(@RequestParam String chargeName)
    {
        ModelAndView respondResult = new ModelAndView();
        try {
            String result  = serAssignCharges.doAddCharges(chargeName);
            if(result.equals("success"))
            {
                respondResult = new ModelAndView("redirect:" + "/getchargeslist"); /*it is redirecting from
                                                                                        "/addcharge" to "/getchargeslist" */ 
            }
            else {
                respondResult.addObject("warning","sorry! failed to add");
            }

        } catch (Exception e) {
            // TODO: handle exception
        }
        return respondResult;
    }

如何使用thyemeleaf发布输入字符串值？

2 个答案: