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Jsp页面列表组件框架设计

作者：李俊杰

概述

为了提高开发效率，减少重复的页面多次开发，提高系统的可配置性和代码的可复用性，也是为了展示struts、hibernate框架，设计原则是降低显示逻辑和数据的耦合，达到显示逻辑和数据完全分离，即相同的数据使用不同的显示逻辑，无须修改显示逻辑，只需置换不同的显示模版即可。

实现机制

其中SturtsAction是具体的需要调用列表的Action类，TempDataMap类是具体的列表数据的封装类，TempData类是具体的表记录类，即TempDataMap来适配TempData，把表记录适配成我们需要的列表显示类。

调用示例：

Action：

//获取数据库数据

listRowCount = query.findPayItemByParam(paramInfo,paramForm.getPageSize(),paramForm.getPageNo());

list = listRowCount.getList();

//调用列表组件

if(list != null && list.size() > 0)

ColDataMgrmgr = new ColDataMgr(getDataMaps(list));

//获取列表的表列信息，数据信息

ArrayList colMetaInfos = mgr.getColMetaInfos();

ArrayList datas = mgr.getData();

//将列表信息传到List页面

request.setAttribute(CoreConstant.WEB_DISPLAY_COL_METAT_INFOS_KEY, colMetaInfos);

request.setAttribute(CoreConstant.WEB_DISPLAY_DATAS_KEY, datas);

同样道理，给出的数据可以分发给打印组件和导出excel列表组件，根据列表的列信息和数据信息，导出excel和打印。

具体的map类的内容可参照附件ReceiveItemAmountQueryMap.java文件。

获取显示列信息：

/**

*返回的list中每个元素是列元信息类对象，列元信息类对象包括列名称，列显示名称，

*列显示格式，其中列名称是key

*导出excel和打印是同样的道理

*/

public ArrayList getColMetaInfos()

{

ArrayList list = new ArrayList();

list.add(new ColMetaInfo("transCode", "单据编号", true, "height="20" align="center" nowrap"));

list.add(new ColMetaInfo("transDate", "单据日期", false, "height="20" align="center" nowrap"));

list.add(new ColMetaInfo("transTypeName", "业务类型", false, "height="20" align="left" nowrap"));

list.add(new ColMetaInfo("receiveOrgName", "收款单位", false, "height="20" align="left" nowrap"));

list.add(new ColMetaInfo("receiveAccountNo", "收款账户号", false, "height="20" align="center" nowrap"));

list.add(new ColMetaInfo("receiveBankName", "收款银行", false, "height="20" align="left" nowrap"));

list.add(new ColMetaInfo("extAccountNo", "付款账户", false, "height="20" align="center" nowrap"));

list.add(new ColMetaInfo("extBankName", "付款银行", false, "height="20" align="left" nowrap"));

list.add(new ColMetaInfo("amount", "金额", false, "height="20" align="right" nowrap"));

list.add(new ColMetaInfo("memo", "摘要", false, "height="20" align="left" nowrap"));

return list;

}

//适配数据，根据数据的类型如日期型，装换成需要的字符串形式，金额类数据也转换成相//应的字符串格式，保存到HashMap中。

public HashMap getColData()

{

StringBuffer sb = new StringBuffer("receiveItemAmountQueryAction.do?operation=");

sb.append(CoreConstant.WEB_OPERATION_TYPE_TO_UPDATE_KEY);

sb.append("&id=");

sb.append(String.valueOf(form.getTransApplyItem().getTransApplyID().longValue()));

String link = sb.toString();

HashMap hm = new HashMap();

hm.put("transCode"," " IDataFormat.formatString(form.getTransCode()));

hm.put("transDate", " " IDateFormat.toDateString(form.getTransDate()));

hm.put("transTypeName", " " IDataFormat.formatString(form.getTransTypeName()));

hm.put("receiveOrgName", " " IDataFormat.formatString(form.getReceiveOrgName()));

hm.put("receiveAccountNo", " " IDataFormat.formatString(form.getReceiveAccountNo()));

hm.put("receiveBankName", " " IDataFormat.formatString(form.getReceiveBankName()));

hm.put("extAccountNo", " " IDataFormat.formatString(form.getTransApplyItem().getExtAccountNo()));

hm.put("extBankName", " " IDataFormat.formatString(form.getTransApplyItem().getExtBankName()));

if (form.getTransApplyItem().getAmount() != null)

{

String sAmount = " " IDataFormat.formatDisabledAmount(form.getTransApplyItem().getAmount().doubleValue() );

hm.put("amount", sAmount);

}

else

{

hm.put("amount", "0.00");

}

hm.put("memo", " " IDataFormat.formatString(form.getTransApplyItem().getMemo()));

hm.put("SUPERLINK", link);

return hm;

}

附录：

DataMap接口：

/**

* @author lijj

*

* To change the template for this generated type comment go to

* Window - Preferences - Java - Code Generation - Code and Comments

*/

public interface DataMap {

public ArrayList getColMetaInfos();

public ArrayList getExeclColMetaInfos();

public ArrayList getPrintColMetaInfos();

public ArrayList getColSearchs();

public HashMap getQueryData();

public String getSearchUrl();

public HashMap getColData();

}

抽象实现类DefaultDataMap

import java.util.ArrayList;

import java.util.HashMap;

/**

* @author lijj

*

* To change the template for this generated type comment go to

* Window - Preferences - Java - Code Generation - Code and Comments

*/

public abstract class DefaultDataMap implements DataMap{

public abstract ArrayList getColMetaInfos();

public abstract HashMap getColData();

public ArrayList getExeclColMetaInfos()

{

return new ArrayList();

}

public ArrayList getPrintColMetaInfos()

{

return new ArrayList();

}

public String getSearchUrl()

{

return null;

}

public HashMap getQueryData()

{

return null;

}

public ArrayList getColSearchs()

{

ArrayList retList = new ArrayList();

return retList;

}

}

ColDataMgr管理类：

import java.util.ArrayList;

import java.util.HashMap;

/**

* @author lijj

*

* To change the template for this generated type comment go to Window - Preferences - Java - Code Generation - Code and

* Comments

*/

public class ColDataMgr

{

ArrayListlist= null;

DataMapmap= null;

public ColDataMgr(ArrayList list)

{

this.list = list;

}

public ColDataMgr(DataMap map)

{

this.map = map;

}

public ArrayList getColMetaInfos()

{

if (list != null)

{

return ((DataMap) list.get(0)).getColMetaInfos();

}

else

{

return this.map.getColMetaInfos();

}

}

public ArrayList getExeclColMetaInfos()

{

if (list != null)

{

return ((DataMap) list.get(0)).getExeclColMetaInfos();

}

else

{

return this.map.getExeclColMetaInfos();

}

}

public ArrayList getPrintColMetaInfos()

{

if (list != null)

{

return ((DataMap) list.get(0)).getPrintColMetaInfos();

}

else

{

return this.map.getPrintColMetaInfos();

}

}

public ArrayList getData()

{

ArrayList retList = new ArrayList();

DataMap dataMap = null;

if (list != null)

{

for (int i = 0; i < list.size(); i )

{

dataMap = (DataMap) list.get(i);

retList.add(dataMap.getColData());

}

}

return retList;

}

public ArrayList getSearchInfos()

{

return getDataMap().getColSearchs();

}

public String getSearchUrl()

{

return getDataMap().getSearchUrl();

}

public HashMap getQueryData()

{

return getDataMap().getQueryData();

}

private DataMap getDataMap()

{

if (this.map != null)

{

return map;

}

else

{

return ((DataMap) list.get(0));

}

}

}

列元信息类ColMetaInfo

/**

* @author lijj

*

* To change the template for this generated type comment go to Window - Preferences - Java - Code Generation - Code and

* Comments

*/

public class ColMetaInfo

{

private Stringname;

private StringdisplayName;

private booleanisLink;

private String property;

public ColMetaInfo(String name, String displayName, boolean isLink, String property)

{

this.name = name;

this.displayName = displayName;

this.isLink = isLink;

this.property = property;

}

public String getDisplayName()

{

return displayName;

}

public void setDisplayName(String displayName)

{

this.displayName = displayName;

}

public boolean isLink()

{

return isLink;

}

public void setLink(boolean isLink)

{

this.isLink = isLink;

}

public String getName()

{

return name;

}

public void setName(String name)

{

this.name = name;

}

public String getProperty()

{

return property;

}

public void setProperty(String property)

{

this.property = property;

}

}

模版文件list.jsp

ArrayList colMetaInfos = (ArrayList) request.getAttribute("colMetaInfos");

ArrayList datas = (ArrayList) request.getAttribute("datas");

int colLen = colMetaInfos.size();

int resultCount = datas.size();

%>

ColMetaInfo colMeta = null;

for (int i = 0; i < colLen; i )

{

colMeta = (ColMetaInfo) colMetaInfos.get(i);

%>

}

%>

HashMap hm = null;

for (int i = 0; i < resultCount; i )

{

%>

hm = (HashMap) datas.get(i);

for (int j = 0; j < colLen; j )

{

colMeta = (ColMetaInfo) colMetaInfos.get(j);

%>

>

if (colMeta.isLink() && hm.get(colMeta.getName()) != null

&& !((String) hm.get(colMeta.getName())).equals(""))

{

%>

}

else

{

%>

}

%>

}

%>

}

%>

//没有记录显示空白行

if (resultCount == 0)

{

%>

for (int i = 0; i < colLen; i )

{

colMeta = (ColMetaInfo) colMetaInfos.get(i);

%>

}

}

%>

Jsp使用列表模版的片断

开户申请

新增" name="bt" class=button onClick="JavaScript:to_Add();">