Question

我收到以下错误 - java.lang.IllegalStateException：既没有BindingResult也没有bean名称的明确目标对象＆＃39;命令＆＃39;可用作请求属性

我试图搜索网络，但解决方案没有解决这个问题。

请找我的控制器类

@Controller
public class LoginController {

    @RequestMapping(value = "/login",method=RequestMethod.GET)
    public String showLoginPage(Model model) {
        model.addAttribute("login", new LoginBean());
        return "login";
    }
}

login.jsp文件

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
    <h2>Information</h2>
    <form:form method="POST">
        <table>
            <tr>
                <td><form:label path="emailId">Name</form:label></td>
                <td><form:input path="emailId" /></td>
            </tr>
            <tr>
                <td><form:label path="password">Age</form:label></td>
                <td><form:input path="password" /></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="Submit" /></td>
            </tr>
        </table>
    </form:form>
</body>
</html>

LoginBean.java类

public class LoginBean {
    public LoginBean() {
    }
    private String emailId;
    private String password;

    public LoginBean(String emailId, String password) {
        this.emailId = emailId;
        this.password = password;
    }

    public String getEmailId() {
        return emailId;
    }

    public void setEmailId(String emailId) {
        this.emailId = emailId;
    }
    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

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Answer 1

我想你应该在JSP中的表单中添加以下commandName属性：

<form:form method="POST" commandName="login">
        <table>
            <tr>
                <td><form:label path="emailId">Name</form:label></td>
                <td><form:input path="emailId" /></td>
            </tr>
            <tr>
                <td><form:label path="password">Age</form:label></td>
                <td><form:input path="password" /></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="Submit" /></td>
            </tr>
        </table>
    </form:form>

因为弹簧形式不能理解你引用的对象。

在jsp页面中获取错误

1 个答案: