Question

当我将值jsp返回到contoller updateuser方法时，我有以下类，commonMonth的值在monthlyMemberSatus列表中显示空值。我不知道我的代码中的错误是什么......帮帮我

控制器：

@RequestMapping(value = "/tempOpen",method = {RequestMethod.POST, RequestMethod.GET})
public ModelAndView monthMemberList(@ModelAttribute("commanMonth") CommanMonth commanMonth) {
    commanMonth.setMonthlyMemberStatus(dataService.listMonthMember());
    return new ModelAndView("hlo","commanMonth",commanMonth);
}

@RequestMapping("/tempClose")
public ModelAndView updateUser(@ModelAttribute("commanMonth") CommanMonth commanMonth) {
    System.out.println(month.getMonthlyMemberStatus());

    dataService.updateRow(month);
    return new ModelAndView("hlo","commanMonth",month);
}

模特课：

public class CommanMonth {
private List<MonthlyMemberStatus> monthlyMemberStatus;
public List<MonthlyMemberStatus> getMonthlyMemberStatus() {
    return monthlyMemberStatus;
}

public void setMonthlyMemberStatus(List<MonthlyMemberStatus> monthlyMemberStatus) {
    this.monthlyMemberStatus = monthlyMemberStatus;
}

Jsp Page：hlo.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/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>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
${commanMonth}
<form:form modelAttribute="commanMonth" method="post"
        action="tempClose.html">
        <table width="400px" height="150px">
            <c:forEach items="${commanMonth.monthlyMemberStatus}" var="list" varStatus="status">
                <tr>
                    <td><form:label path="monthlyMemberStatus[${status.index}].roomMembers.memberName" >${list.roomMembers.memberName}</form:label></td>
                    <td><form:input path="monthlyMemberStatus[${status.index}].noOffDays" value="31"/></td>
                    <%-- <td style="visibility:hidden"><form:input path="li[${status.index}].bookId" value="${list.bookId}" readonly="true"/></td>
                        <td><form:input path="temp[${status.index}].book" value="hloloo"/></td>
                    </tr> --%>
                    </c:forEach> 
                    <tr>
                <td></td>
                <td><input type="submit" value="Update" />
                </td>
            </tr>
                </table>
    </form:form>
 </body>
 </html>

Answer 1

我认为你没有在你的任何getter方法中指定@ModelAttribute（“month”），所以你需要先定义一下，知道模型属性的spring控制器名称为'month'

还尝试添加如下所示的输入标记而不是路径

<td><input name="monthlyMemberStatus[${status.index}].noOffDays" value="31"/></td>

注意：还要在控制器方法

中指定 RequestMethod.POST

@RequestMapping(value = "/tempOpen",method = {RequestMethod.POST, RequestMethod.GET})
public ModelAndView monthMemberList(@ModelAttribute("commanMonth") CommanMonth commanMonth) {
    commanMonth.setMonthlyMemberStatus(dataService.listMonthMember());
    return new ModelAndView("hlo","commanMonth",commanMonth);
}

@RequestMapping(value="/tempClose", method = RequestMethod.POST)
public ModelAndView updateUser(@ModelAttribute("commanMonth") CommanMonth commanMonth) {
    System.out.println(month.getMonthlyMemberStatus());

    dataService.updateRow(month);
    return new ModelAndView("hlo","commanMonth",month);
}

Answer 2

请求标头查看来源

lapply(strwrap(x, width = 10, simplify = FALSE), paste, collapse="\n")

Answer 3

由于我无法在评论字段中更新它，因此将其发布在“答案”字段中。这是我的Servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

    <context:property-placeholder location="classpath:resources/database.properties" />
    <context:component-scan base-package="com.room" />

    <tx:annotation-driven transaction-manager="hibernateTransactionManager"/>
    <bean id="jspViewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean> 

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${database.driver}" />
        <property name="url" value="${database.url}" />
        <property name="username" value="${database.user}" />
        <property name="password" value="${database.password}" />
    </bean>

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="annotatedClasses">
        <list>
            <value>com.room.model.RoomMembers</value>
            <value>com.room.model.DailyExpense</value>
            <value>com.room.model.MonthlyExpense</value>
            <value>com.room.model.FinalSettlement</value>
            <value>com.room.model.MemberInOut</value>
            <value>com.room.model.SpecialExpense</value>
            <value>com.room.model.MonthlyMemberStatus</value>


        </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>             
            </props>
        </property>
    </bean>

    <bean id="hibernateTransactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
</beans>

如何将jsp中的列表值发送到控制器

3 个答案: