java 树形结构设计(六) Struts + Hibernate

step 10、构造 树形结构类

java 代码

/**
 * 地理信息数结构
 */
package com.fzfx88.common.tree;

import java.util.Vector;

/**
 * @author huguoqing
 *
 */
public class GeographyTreeItem {

    public String strTitle;
    public String strValue;
    public String strText;
    public boolean bDisplayChildren;
    public String strImg;
    public boolean bSelected;
    public boolean bSelectable;
    public boolean bLoadChildren;
    public String strChildURL;
    public Vector vChildren;
    public GeographyTreeItem parent;

    public GeographyTreeItem(String strValue, String strText, String strTitle)
    {
        bDisplayChildren = false;
        strImg = "";
        bSelected = false;
        bSelectable = true;
        bLoadChildren = true;
        strChildURL = "";
        vChildren = new Vector();
        parent = null;
        this.strTitle = strTitle;
        this.strValue = strValue;
        this.strText = strText;
    }

    public GeographyTreeItem(String strValue, String strText)
    {
        this(strValue, strText, strValue);
    }

    public GeographyTreeItem(String strValue)
    {
        this(strValue, strValue, strValue);
    }

    public GeographyTreeItem()
    {
        this("", "", "");
    }

    public void setImage(String strImg)
    {
        this.strImg = strImg;
    }

    public void setDisplayChildren(boolean bDisplay)
    {
        bDisplayChildren = bDisplay;
    }

    public boolean isDisplayChildren()
    {
        return bDisplayChildren;
    }

    public void setSelected(boolean bSelected)
    {
        this.bSelected = bSelected;
    }

    public boolean isSelected()
    {
        return bSelected;
    }

    public void setSelectable(boolean selectable)
    {
        bSelectable = selectable;
    }

    public boolean isSelectable()
    {
        return bSelectable;
    }

    public void addChild(GeographyTreeItem item)
    {
        vChildren.addElement(item);
    }

    public int getCount()
    {
        return vChildren.size();
    }

    public GeographyTreeItem getChild(int index)
    {
        if(index >= getCount())
        {
            return null;
        } else
        {
            GeographyTreeItem item = (GeographyTreeItem)vChildren.get(index);
            return item;
        }
    }

    public void setLoadChildren(boolean bLoad)
    {
        bLoadChildren = bLoad;
    }

    public boolean isLoadChildren()
    {
        return bLoadChildren;
    }

    public void setURL(String strURL)
    {
        strChildURL = strURL;
    }

    public String getURL()
    {
        return strChildURL;
    }

    public String getHTML(String strPath, boolean bLine)
    {
        StringBuffer stHTML = new StringBuffer(1000);
        if(strText != null)
        {
            int nlength = getRealLength(strText);
            nlength = nlength * 12 + 10;
            stHTML.append("《TABLE  valign=top width=" + nlength + " cellSpacing=0 cellPadding=0 border=0》\r\n");
            stHTML.append("  《TR  valign=top  》\r\n");
            stHTML.append("    《TD vAlign=top width=5》" + strImg + "《/TD》\r\n");
            stHTML.append("    《TD valign=top class=treeview_ob_td");
            if(bSelectable)
                stHTML.append(" onclick=treeview_ob_ft(this) ondoubleclick=treeview_ob_modify(this)");
            stHTML.append("  title='" + strTitle + "' value='" + strValue + "' " + (bSelected ? "style=\"background-Color:#ccddee;\"" : "") + "》" + strText + "《/TD》\r\n");
            stHTML.append("  《/TR》\r\n");
            stHTML.append("《/TABLE》\r\n");
        }
        stHTML.append(getChildHTML(strPath, bLine));
        return stHTML.toString();
    }

    public String getChildHTML(String strPath, boolean bLine)
    {
        StringBuffer stHTML = new StringBuffer();
        String strVertical = "";
        String strVertDisp = "";
        if(bLine)
            strVertical = " style=\、"BACKGROUND-IMAGE: url(" + strPath + "vertical.gif)\" ";
        if(getCount() > 0)
            if(bLoadChildren || bDisplayChildren)
            {
                stHTML.append("《TABLE valign=top style=\"DISPLAY: " + (bDisplayChildren ? "block" : "none") + "\" cellSpacing=0 cellPadding=0 border=0》\r\n");
                for(int i = 0; i < vChildren.size(); i++)
                {
                    GeographyTreeItem item = getChild(i);
                    strVertDisp = strVertical;
                    String strImg_tmp = "";
                    String strURL = "";
                    if(!item.isLoadChildren())
                        strURL = item.getURL();
                    if(item.getCount() > 0)
                    {
                        if(item.isDisplayChildren())
                        {
                            if(i < vChildren.size() - 1)
                            {
                                strImg_tmp = "《IMG class=treeview_ob_ic onclick=\"treeview_ob_wk(this, '" + strURL + "')\" src=\"" + strPath + "minus.gif\" 》";
                            } else
                            {
                                strImg_tmp = "《IMG class=treeview_ob_ic onclick=\"treeview_ob_wk(this, '" + strURL + "')\" src=\"" + strPath + "minus_l.gif\" 》";
                                strVertDisp = "";
                            }
                        } else
                        if(i < vChildren.size() - 1)
                        {
                            strImg_tmp = "《IMG class=treeview_ob_ic onclick=\"treeview_ob_wk(this, '" + strURL + "')\" src=\"" + strPath + "plusik.gif\" 》";
                        } else
                        {
                            strImg_tmp = "《IMG class=treeview_ob_ic onclick=\"treeview_ob_wk(this, '" + strURL + "')\" src=\"" + strPath + "plusik_l.gif\" 》";
                            strVertDisp = "";
                        }
                    } else
                    {
                        if(i < vChildren.size() - 1)
                            strImg_tmp = "《IMG class=treeview_ob_ic src=\/"" + strPath + "hr.gif\" 》";
                        else
                            strImg_tmp = "《IMG class=treeview_ob_ic src=\/"" + strPath + "hr_l.gif\" 》";
                        strVertDisp = "";
                    }
                    stHTML.append("  《TR 》\/r\/n");
                    stHTML.append("    《TD class=treeview_ob_ic " + strVertDisp + " width=1 》 \/r\/n");
                    stHTML.append("      ").append(strImg_tmp);
                    stHTML.append("《/TD 》\/r\/n");
                    stHTML.append("    《TD 》\/r\/n");
                    stHTML.append(item.getHTML(strPath, bLine));
                    stHTML.append("    《/TD 》\/r\/n");
                    stHTML.append("  《/TR 》\/r\/n");
                }

                stHTML.append("《/TABLE》\/r\/n");
            } else
            {
                stHTML.append("《TABLE style=\"DISPLAY: " + (bDisplayChildren ? "block" : "none") + "\" cellSpacing=0 cellPadding=0 border=0》\r\n");
                stHTML.append("  《TR》\/r\/n");
                stHTML.append("    《TD class=treeview_ob_td 》正读取数据，请稍候 .../TD》\/r\/n");
                stHTML.append("  《/TR》\/r\/n");
                stHTML.append("《/TABLE》\/r\/n");
            }
        return stHTML.toString();
    }

    protected int getRealLength(String strText)
    {
        int nCount = 0;
        int nNow = -1;
        int nLength = strText.length();
        do
        {
            int nStart = strText.indexOf(60, nNow);
            if(nStart == -1)
            {
                nCount += nLength - nNow - 1;
                break;
            }
            nCount += nStart - nNow - 1;
            int nEnd = strText.indexOf(62, nStart);
            if(nEnd == -1)
            {
                nCount += nLength - nStart - 1;
                break;
            }
            nNow = nEnd;
            nCount += 2;
        } while(true);
        return nCount;
    }

}

 

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java 树形结构设计(七) Struts + Hiberna ... | java 树形结构设计(五) Struts + Hiberna ...

• 2007-05-29 13:14
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