Spring java.lang.IllegalStateException:bean name';新奖励';可用作请求属性
我是SpringMVC的新手,跟随《SpringInAction》一书,从头开始创建自己的项目。我在尝试访问“reward.jsp”时遇到以下异常: java.lang.IllegalStateException:bean名称“奖励”的BindingResult和普通目标对象都不能作为请求属性使用 我的课程内容: reward.jspSpring java.lang.IllegalStateException:bean name';新奖励';可用作请求属性,spring,spring-mvc,Spring,Spring Mvc,我是SpringMVC的新手,跟随《SpringInAction》一书,从头开始创建自己的项目。我在尝试访问“reward.jsp”时遇到以下异常: java.lang.IllegalStateException:bean名称“奖励”的BindingResult和普通目标对象都不能作为请求属性使用 我的课程内容: reward.jsp <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <%@ tagl
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="sf"%>
<html>
<head>
<title>Rewards</title>
</head>
<body>
<h1>Rewards module</h1>
<h2>Add reward</h2>
<sf:form action="add" method="post" modelAttribute="reward">
Reward name:<sf:input path="name" />
Point value:<sf:input path="pointValue" />
<input type="submit" value="Add">
</sf:form>
<br />
<h2>Reward list</h2>
<table>
<c:forEach var="reward" items="${rewardList}">
<tr>
<td>${reward.name}</td>
<td>${reward.pointValue}</td>
<td><a href="delete/${reward.id}">delete</a></td>
</tr>
</c:forEach>
</table>
奖励
奖励模块
奖励
奖励名称:
分值:
奖励名单
${raward.name}
${raward.pointValue}
当我删除表单输入时,它工作得很好
RewardController.java
@Controller
public class RewardController {
@Autowired
private RewardService rewardService;
@RequestMapping("/reward")
public String listRewards(Map<String, Object> model) {
model.put("rewardList", rewardService.listReward());
return "reward";
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
public String addReward(@ModelAttribute("reward") Reward reward,
BindingResult result) {
rewardService.addReward(reward);
return "redirect:/reward";
}
@RequestMapping("/delete/{rewardId}")
public String deleteContact(@PathVariable("rewardId") long rewardId) {
rewardService.removeReward(rewardId);
return "redirect:/reward";
}
}
@控制器
公共类报酬控制器{
@自动连线
私人报酬服务报酬服务;
@请求映射(“/reward”)
公共字符串列表奖励(映射模型){
model.put(“rewardList”,rewardService.listReward());
回报“奖励”;
}
@RequestMapping(value=“/add”,method=RequestMethod.POST)
公共字符串addReward(@ModelAttribute(“奖励”)奖励奖励,
BindingResult(结果){
奖励服务。添加奖励(奖励);
返回“重定向/奖励”;
}
@请求映射(“/delete/{rewardId}”)
公共字符串deleteContact(@PathVariable(“Rewardd”)长Rewardd){
奖赏服务。移除奖赏(奖赏);
返回“重定向/奖励”;
}
}
更改您的listRewards
方法,以便它将表单支持对象添加到模型映射model.put(“reward”,new Rewards())
@RequestMapping(“/reward”)
公共字符串列表奖励(映射模型){
model.put(“rewardList”,rewardService.listReward());
model.put(“奖励”,新奖励())
回报“奖励”;
}
在sf:form标记中使用奖励对象之前,需要在模型中绑定一个空的奖励对象。
@RequestMapping("/reward")
public String listRewards(Map<String, Object> model) {
model.put("rewardList", rewardService.listReward());
model.put("reward", new Reward())
return "reward";
}