java 树形结构设计(五) Struts + Hibernate-优快云博客

本文介绍了一种使用Java实现的地理信息树结构构建方法。通过从数据库查询地理信息，并将其组织成树形结构，便于进行地理层级管理和展示。文章详细阐述了如何创建地理树视图管理器，并提供了构造树结构的具体步骤。

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step 9 构造树结构类

java 代码

/**
* 新建地理信息树结构
*/
package com.fzfx88.common.tree;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.fzfx88.common.util.StringUtility;
import com.fzfx88.base.service.GeographyService;
import com.fzfx88.po.base.DimGeography;
/**
* @author huguoqing
*
*/
public class GeographyNewTree {
private String onClick;
private String orgTopName;
private Integer rootId;
private String pattern;
private List selectedIds;
private GeographyTreeViewManager tvmOrg;
private List selectedOrgIdList;
private String clickTarget;
private String treeItemHref;
private String treeItemClick;
public GeographyNewTree()
{
selectedIds = new ArrayList();
tvmOrg = null;
}
protected void createTree()
{
try
{
GeographyService service = new GeographyService();
List graphyList = service.queryGeography();
tvmOrg = getTree(graphyList);
}
catch(Exception e)
{
e.printStackTrace();
}
}
/**
*
* @param graphyList
* @return
*/
protected GeographyTreeViewManager getTree(List graphyList)
{
GeographyTreeViewManager tvm;
if(orgTopName == null || orgTopName.trim().equals(""))
{
tvm = new GeographyTreeViewManager();
} else
{
GeographyTreeItem rootItem = new GeographyTreeItem("0", getItemText("0", "0", orgTopName), orgTopName);
tvm = new GeographyTreeViewManager(rootItem);
}
// String curSiteID = "";
List rootIdList = new ArrayList();
Map graphyMap = new HashMap();
for(int i = 0; i < graphyList.size(); i++)
{
DimGeography geography = (DimGeography)graphyList.get(i);
graphyMap.put(geography.getId(),geography);
//判断是否是总公司
if(geography.getGeoTreeCode().equalsIgnoreCase("0")){
rootIdList.add(geography.getId());
}
//if(org.getOrgTreeCode().equalsIgnoreCase(Constants.ORG_TYPE_TOP_IDT)){
// rootIdList.add(org.getId());
// }
}
if(rootId != null && graphyMap.containsKey(rootId))
{
rootIdList.clear();
rootIdList.add(rootId);
}
Map mapGeography = new HashMap();
GeographyTreeItem graphyItem = null;
for(int i = 0; i < rootIdList.size(); i++)
{
DimGeography geography = (DimGeography)graphyMap.get(rootIdList.get(i));
graphyItem = new GeographyTreeItem("0", getItemText(geography.getId().toString(), "0", geography.getGeographyName()), "");
mapGeography.put(geography.getId() + "###", graphyItem);
tvm.addItem(graphyItem);
}
for(int i = 0; i < graphyList.size(); i++)
{
DimGeography graphy = (DimGeography)graphyList.get(i);
if(!(graphy.getGeoTreeCode().equalsIgnoreCase("0")))
{
String graphyId = graphy.getId().toString();
GeographyTreeItem parentItem = (GeographyTreeItem)mapGeography.get(graphy.getParentGeo() + "###");
GeographyTreeItem thisItem = new GeographyTreeItem(graphyId, getItemText(graphyId, graphyId, graphy.getGeographyName()), graphy.getGeographyName());
if(parentItem != null)
{
parentItem.addChild(thisItem);
thisItem.parent = parentItem;
mapGeography.put(graphyId + "###", thisItem);
}
}
}
if(selectedOrgIdList != null)
{
for(int i = 0; i < selectedOrgIdList.size(); i++)
{
Integer graphyId = (Integer)selectedOrgIdList.get(i);
GeographyTreeItem expandOrgItem = (GeographyTreeItem)mapGeography.get(graphyId + "###");
expandTreeItem(expandOrgItem);
}
}
return tvm;
}
/**
*
* @param ti
*/
private void expandTreeItem(GeographyTreeItem ti)
{
GeographyTreeItem parent = ti.parent;
if(parent != null)
{
parent.setDisplayChildren(true);
expandTreeItem(parent);
}
}
protected String getItemText(String graphyID, String strID, String strName)
{
StringBuffer sb = new StringBuffer();
StringBuffer linkBuf = new StringBuffer();
if(treeItemHref != null)
{
String onClickTmp = StringUtility.replace(treeItemHref, "[orgId]", graphyID);
linkBuf.append(" + onClickTmp + "\" style=\"cursor:hand;color:#1E2855\""); );
if(!StringUtility.isNullOrBlank(treeItemClick)){
String treeItemClickTmp = StringUtility.replace(treeItemClick, "[orgId]", graphyID);
linkBuf.append(" onClick=\"").append(treeItemClickTmp).append("\"");
}
if(!StringUtility.isNullOrBlank(clickTarget)){
linkBuf.append(" target=\"").append(clickTarget).append("\"");
}
linkBuf.append(">");
} else
{
linkBuf.append(");
}
linkBuf.append(strName);
linkBuf.append("");
if(pattern != null)
{
String patternStr = StringUtility.replace(pattern, "[orgId]", graphyID);
patternStr = StringUtility.replace(patternStr, "[link]", linkBuf.toString());
try
{
Integer orgIDInt = new Integer(graphyID);
if(selectedIds.contains(orgIDInt))
patternStr = StringUtility.replace(patternStr, "[checked]", "checked");
else
patternStr = StringUtility.replace(patternStr, "[checked]", "");
}
catch(Exception exception) { }
sb.append(patternStr);
} else
{
sb.append(linkBuf.toString());
}
return sb.toString();
}
protected String getItemText(String strName)
{
StringBuffer sb = new StringBuffer();
sb.append(");
sb.append(strName);
sb.append(""
return sb.toString();
}
public String getHtml()
{
createTree();
return tvmOrg.getHTML();
}
public void setOnClick(String onClick)
{
this.onClick = onClick;
}
public void setTopName(String orgTopName)
{
this.orgTopName = orgTopName;
}
public void setRootId(Integer rootId)
{
this.rootId = rootId;
}
public void setPattern(String pattern)
{
this.pattern = pattern;
}
public void setSelectedIds(List selectedIds)
{
this.selectedIds = selectedIds;
}
public void setSelectedOrgIdList(List orgIdList)
{
selectedOrgIdList = orgIdList;
}
public String getClickTarget() {
return clickTarget;
}
public void setClickTarget(String clickTarget) {
this.clickTarget = clickTarget;
}
public String getTreeItemClick() {
return treeItemClick;
}
public void setTreeItemClick(String treeItemClick) {
this.treeItemClick = treeItemClick;
}
public String getTreeItemHref() {
return treeItemHref;
}
public void setTreeItemHref(String treeItemHref) {
this.treeItemHref = treeItemHref;
}
}