电力项目十五--数据字典

数据字典的作用：

1.贯穿系统的所有数据项，开发过程中，动态的维护系统数据项：

2.保证数据的录入安全，业务表使用数据字典的时候，存放的是数据项的编号，而不是数据项的值。

3.方便系统的统计。

1.数据库的设计：

#数据字典

create table Elec_SystemDDL(

　　seqID INT NOT NULL primary key, #主键ID(自增长)

　　keyword VARCHAR(20)  NULL, #数据类型

　　ddlCode INT NULL, #数据项的code

　　ddlName VARCHAR(50) NULL #数据项的value

);

创建Elec_SystemDDL.java文件

package com.itheima.elec.bean;

import java.io.Serializable;

@SuppressWarnings("serial")
public class ElecSytemDDL implements Serializable{

    private Integer seqID;
    private String keyword;
    private Integer ddlCode;
    private String ddlName;

    public Integer getSeqID() {
        return seqID;
    }
    public void setSeqID(Integer seqID) {
        this.seqID = seqID;
    }
    public String getKeyword() {
        return keyword;
    }
    public void setKeyword(String keyword) {
        this.keyword = keyword;
    }
    public Integer getDdlCode() {
        return ddlCode;
    }
    public void setDdlCode(Integer ddlCode) {
        this.ddlCode = ddlCode;
    }
    public String getDdlName() {
        return ddlName;
    }
    public void setDdlName(String ddlName) {
        this.ddlName = ddlName;
    }

}

创建对应的hbm.xml文件 ElecSystemDDL.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
    <hibernate-mapping>
        <class name="com.itheima.elec.bean.ElecSystemDDL" table="Elec_SystemDDL">
            <id name="seqID" type="integer" column="seqID">
                <generator class="increment"></generator>
            </id>
            <property  name="keyword" type="string" column="keyword"></property>
            <property name="ddlCode" type="integer" column="ddlCode"></property>
            <property name="ddlName" type="string" column="ddlName"></property>

        </class>

    </hibernate-mapping>
    

然后在hibernate.cfg.xml文件中添加文件

    <mapping resource="com/itheima/elec/bean/ElecSystemDDL.hbm.xml"/>

IElecSystemDDL.java

package com.itheima.elec.dao;

import com.itheima.elec.bean.ElecSystemDDL;

public interface IElecSystemDDLDao extends ICommonDao<ElecSystemDDL> {
    public static final String SERVICE_NAME = "com.itheima.elec.dao.impl.ElecSystemDDLDaoImpl";

}

ElecSystemDDLDaoImpl.java

package com.itheima.elec.dao.impl;
import org.springframework.stereotype.Repository;

import com.itheima.elec.bean.ElecSystemDDL;
import com.itheima.elec.dao.IElecSystemDDLDao;

/**
 * @Repository
 * 相当于在spring中定义：<bean id="elecTextDaoImpl" class="com. **.ElecTextDaoImpl">
 */
@Repository(IElecSystemDDLDao.SERVICE_NAME)
public class ElecSystemDDLDaoImpl extends CommonDaoImpl<ElecSystemDDL> implements IElecSystemDDLDao{

}

IElecSystemDDLService.java

package com.itheima.elec.service;

import java.util.List;

import com.itheima.elec.bean.ElecSystemDDL;

public interface IElecSystemDDLService {

    public static final String SERVICE_NAME="com.itheima.elec.service.impl.ElecSystemDDLServiceImpl";
}

ElecSystemDDLServiceImpl.java

package com.itheima.elec.service.impl;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.itheima.elec.dao.IElecSystemDDLDao;
import com.itheima.elec.service.IElecSystemDDLService;
//事务控制：spring的声明事务处理,在service层添加@Transactional
@Service(IElecSystemDDLService.SERVICE_NAME)
@Transactional(readOnly=true)
public class ElecSystemDDLServiceImpl implements IElecSystemDDLService {

    /*数据字典Dao*/
    @Resource(name=IElecSystemDDLDao.SERVICE_NAME)
    IElecSystemDDLDao elecSystemDDLDao;

}

ElecSystemDDLAction.java

package com.itheima.elec.web.action;

import javax.annotation.Resource;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.itheima.elec.bean.ElecSystemDDL;
import com.itheima.elec.service.IElecSystemDDLService;
import com.itheima.elec.service.IElecTextService;

@SuppressWarnings("serial")
@Controller("elecSystemDDLAction")
@Scope(value="prototype")
public class ElecSystemDDLAction extends BaseAction<ElecSystemDDL>{

    ElecSystemDDL elecSystemDDL = this.getModel();

    //注入Service
    @Resource(name=IElecSystemDDLService.SERVICE_NAME)
    IElecSystemDDLService elecSystemDDLService;

/**
 * 数据字典的首页显示
 * 跳转到：/system/dictionIndex.jsp页面
 */
public String home(){
    return "home";
}

}

struts.xml

<action name="elecSystemDDLAction_*" class="elecSystemDDLAction" method="{1}">
                <result name="home">/WEB-INF/page/system/dictionaryIndex.jsp</result>
                <result name="save" type="redirectAction">
                    <param name="actionName">elecCommonMsgAction_home.do</param>
                </result>
                <result name="actingView">/WEB-INF/page/system/actingView.jsp</result>
        </action>

写完了dao,service,action,然后配置struts.xml

然后修改script/menuDate.js中的配置

{
            mid:‘aq‘,
            pid:‘am‘,
            name:‘数据字典维护‘,
            icon:‘../images/MenuIcon/shujuzidianguanli.gif‘,
            target:‘mainFrame‘,
            /*url:‘../system/dictionaryIndex.jsp‘,*/
            url:‘../system/elecSystemDDLAction_home.do‘,
            isParent:false
        }

启动，页面显示：