关于ssh的struts的ModelDriven获取表单信息
来源：1-1 监听器介绍
cccca
2019-12-17 17:45:34
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>图书分类添加</title> </head> <body> <center> <h1>图书分类添加</h1> <div style="color:red"><h2><s:property value="#session.categoryMsg"/></h2></div> <s:form action="CategoryAction_add" method="post" namespace="/"> <table width="400px" cellspacing="0px" cellpadding="0px" border="1px"> <tr> <td>名 字</td> <td><input type="text" name="Category.cName"> </td> </tr> <tr> <td>描 述</td> <td> <input type="text" name="Category.cDescription"> </td> </tr> <tr> <td colspan="2" style="text-align:center"> <input type="submit" value="添加"> <input type="reset" value="重置"> </td> </tr> </table> </s:form> </center> </body> </html>
package com.ssh.action;
import java.util.List;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.ssh.entity.Category;
import com.ssh.service.LibService;
public class CategoryAction extends ActionSupport implements ModelDriven<Category> {
private static final long serialVersionUID = 1L;
private Category cate=new Category();
private LibService libService;
public void setLibService(LibService libService) {
this.libService = libService;
}
@Override
public Category getModel() {
// TODO Auto-generated method stub
System.out.println(cate.toString());
return cate;
}
public Category getCate() {
return cate;
}
public void setCate(Category cate) {
this.cate = cate;
}
public String add() {
System.out.println(this.getModel().toString());
System.out.println("================");
System.out.println(cate.toString());
List<Category>cates= libService.getCategory(getModel().getcName());
if(cates==null) {
cate.setBooks(null);
ActionContext.getContext().getSession().put("categoryMsg", "");
libService.save(getModel());
return "success";
}else {
ActionContext.getContext().getSession().put("categoryMsg", "添加失败，分类已存在");
return "error";
}
}
}<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- 配置SessionFactory -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<!-- 配置Hibernate的属性 -->
<property name="hibernateProperties">
<props>
<!-- 配置数据库方言 -->
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<!--输出运行时生成的SQL语句 -->
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">udate</prop>
</props>
</property>
<!-- 指定HIbernate映射文件的路径 -->
<property name="mappingResources">
<list>
<value>com/ssh/entity/Book.hbm.xml</value>
<value>com/ssh/entity/Category.hbm.xml</value>
<value>com/ssh/entity/User.hbm.xml</value>
</list>
</property>
</bean>
<!-- 配置dataSource -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<!-- 配置数据库JDBC驱动 -->
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<!-- 配置数据库连接URL -->
<property name="url" value="jdbc:mysql://localhost:3306/ssh_library"></property>
<!-- 配置数据库用户名 -->
<property name="username">
<value>root</value>
</property>
<!-- 配置数据库密码 -->
<property name="password">
<value>root</value>
</property>
</bean>
<!--action层bean配置 -->
<bean id="LoginAction" class="com.ssh.action.LoginAction" scope="prototype">
<property name="libService" ref="libService"></property>
</bean>
<bean id="CategoryAction" class="com.ssh.action.CategoryAction" scope="prototype" >
<property name="libService" ref="libService"></property>
</bean>
<!--service层bean配置 -->
<bean id="libService" class="com.ssh.service.LibServiceImpl" >
<property name="libDao" ref="libDao"></property>
</bean>
<!--dao层bean配置 -->
<bean id="libDao" class="com.ssh.dao.LibDaolmpl">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
</beans>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<!--struts根标签 -->
<struts>
<!-- <constant name="struts.devMode" value="true" /> 打开开发模式 -->
<constant name="struts.objectFactory" value="spring" /> <!--引入spring框架 -->
<!--定义包 -->
<package name="default" namespace="/" extends="struts-default">
<action name="LoginAction_*" class="LoginAction" method="{1}">
<result >/server.jsp</result>
<result name="error">/login.jsp</result>
<result name="registSuccess">/login.jsp</result>
<result name="registerror">/regist.jsp</result>
</action>
<action name="CategoryAction_*" class="CategoryAction" method="{1}">
<result >/category.jsp</result>
<result name="error" >/category.jsp</result>
</action>
</package>
</struts>
有跳转，有提交，但就是获取不到表达信息，属性全部都是null
1回答
-
好帮手慕珊
2019-12-17
同学，你好！老师对于Struts的细节问题了解得不多。不过从你的问题描述看，有可能是属性名和Java类中的名称不匹配导致没有得到数据。
你确认一下struts的语法，下面表单中的name怎么写，才能和类中的属性对应
祝学习愉快！
0
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