自制DataGrid

自己写的一个用java在表单生成的GRID
比较乱



package com.znmt.j2ee.common.datagrid;

import java.util.*;
import javax.servlet.jsp.*;
import javax.servlet.http.*;

/**
* <warn></warn>
* <p>Title:datagrid </p>
* <p>Description: 按照指定SQL语句及相应的设置枸造表格，以html表示</p>
* <p>Copyright:  Tidedge Computer. Co., Ltd.</p>
* <p>Company: 泰克艾奇 中南迈特 </p>
* @author xuejun
* @version 1.0
* @serialData 2004/12/7
*  History:// 历史修改记录
*  <author>    <time>     <version >   <desc>
*   xuejun    2004/12/7     1.01       增加静态列设置,包括文字静态列，图像态列设置
*   xuejun    2004/12/8     1.02       将主键值从td里移到链接字符串中
*   xuejun    2004/12/26    1.03       增加图片显示列
*   xuejun    2004/12/27    1.04       增加图片变换列，在页面上增加排序功能
*   xuejun    2004/12/28    1.05       增加简单分页功能
*/

public class grid
{

  String strSQl; //SQL语句
  String[] primaryKeys; //主键列数组
  String[] columnsName; //中文列名数组
  ArrayList dlinkeColums = new ArrayList(2); //动态键接列数组
  ArrayList slinkeColums = new ArrayList(2); //静态键接列数组
  ArrayList showImgColums = new ArrayList(2); //图片显示列数组
  ArrayList imgTransitionColums = new ArrayList(2); //图片转换列
  boolean isHiddenCheck;

  /**
   * 初始化设置表格查询语句
   * @param str_sql SQL查询语句
   */
  public grid(String str_sql)
  {
    this.strSQl = str_sql;
  }

  /**
   * 设置是否隐藏checkbok
   * @param isHidden
   */
  public void setHiddenCheck(boolean isHidden)
  {
    this.isHiddenCheck = isHidden;
  }

  /**
   * 增加图片转换列
   * @param columnName 数据库列名
   * @param showName 表头显示名
   * @param Value 与Value相等时显示imgUrl1,否则显示imgUrl2
   * @param linkUrl 链接地址
   * @param imgUrl1 图片地址1
   * @param imgUrl2 图片地址2
   */
  public void addImgTransitionColum(String columnName,String showName,
                                    String Value1,String Value2,
                                    String linkUrl,
                                    String imgUrl1,String imgUrl2)
  {
    String[] arrayImgTransitionColumn = new String[7];
    arrayImgTransitionColumn[0] = columnName;
    arrayImgTransitionColumn[1] = showName;
    arrayImgTransitionColumn[2] = Value1;
    arrayImgTransitionColumn[3] = Value2;
    arrayImgTransitionColumn[4] = linkUrl;
    arrayImgTransitionColumn[5] = imgUrl1;
    arrayImgTransitionColumn[6] = imgUrl2;
    //加入动态数组列表
    this.imgTransitionColums.add(arrayImgTransitionColumn);
  }

  /**
   * 获得是否隐藏checkbok
   * @param isHidden
   */
  public boolean isHiddenCheck()
  {
    return isHiddenCheck;
  }

  /**
   *设置主键列数组
   * @param priKeys 主键列数组
   */
  public void setPriKey(String[] priKeys)
  {
    this.primaryKeys = priKeys;
  }

  /**
   * 加入显示图片列
   * @param columnName
   * @param showName
   * @param Value
   * @param imgUrl
   */
  public void addShowImgColumn(String columnName,String showName,
                               String Value,String imgUrl)
  {

    String[] arrayShowImgColumn = new String[4];

    arrayShowImgColumn[0] = columnName;
    arrayShowImgColumn[1] = showName;
    arrayShowImgColumn[2] = Value;
    arrayShowImgColumn[3] = imgUrl;
    //加入动态数组列表
    this.showImgColums.add(arrayShowImgColumn);
  }

  /**
   *设置中文列名数组
   * @param tableHeandName 中文列名数组
   */
  public void setColumnName(String[] tableHeandName)
  {
    this.columnsName = tableHeandName;
  }

  /**
   * 设置键接列 (动态链接列)
   * @param columnName  链接列的列名(数据库字段名)
   * @param linkUrl 链接列的URL地址
   */
  public void addLinkColum(String columnName,String linkUrl)
  {
    String[] arrayLinkColum = new String[2];

    arrayLinkColum[0] = columnName;
    arrayLinkColum[1] = linkUrl;
    //加入动态数组列表
    this.dlinkeColums.add(arrayLinkColum);
  }

  /**
   * 设置键接列 (静态链接列)
   * @param linkName 链接列的列名(表头)
   * @param linkUrl 链接列的URL地址
   * @param JpgURL 图像文件的URL地址
   */
  public void addLinkColum(String linkName,String linkUrl,
                           String JpgURL
                           )
  {

    String[] arrayLinkColum = new String[3];

    arrayLinkColum[0] = linkName;
    arrayLinkColum[1] = linkUrl;
    arrayLinkColum[2] = JpgURL;
    //加入静态数组列表
    this.slinkeColums.add(arrayLinkColum);
  }

  /**
   * 判断是否动态链接列
   * @param columnN 列名(数据库字段名)
   * @return boolean 布尔型
   */
  public boolean isdLinkColum(String columnN)
  {
    String[] columnName;
    // 判断是否动态链接列
    for(int i = 0; i < this.dlinkeColums.size(); i++)
    {
      columnName = (String[])dlinkeColums.get(i);
      if(columnName[0].equals(columnN))
      {
        return true;
      }
    }
    return false;
  }

  /**
   * 判断是否图片显示列链接列
   * @param columnN
   * @return
   */
  public boolean isShowImgColum(String columnN)
  {
    String[] columnName;
    // 判断是否图片显示列
    for(int i = 0; i < this.showImgColums.size(); i++)
    {
      columnName = (String[])showImgColums.get(i);
      if(columnName[0].equals(columnN))
      {
        return true;
      }
    }
    return false;
  }

  /**
   *
   * @param columnN
   * @return
   */
  public boolean isImgTransitionColums(String columnN)
  {
    String[] columnName;
    // 判断是否图片显示列
    for(int i = 0; i < this.imgTransitionColums.size(); i++)
    {
      columnName = (String[])imgTransitionColums.get(i);
      if(columnName[0].equals(columnN))
      {
        return true;
      }
    }
    return false;
  }

  /**
   * 根据设置返回grid的html字符串
   * @return grid的html字符串
   */
  public String getGridHtml(JspWriter out,HttpServletRequest req) throws
      JspException
  {
    dbrs sqlgrid = new dbrs();
    sqlgrid.connect();
    //查询
    sqlgrid.query(this.strSQl);
    String jspName = req.getRequestURI(); //jsp文件名
    jspName = jspName.substring(jspName.lastIndexOf("/") + 1);

    boolean[] islink = new boolean[sqlgrid.columnCount]; //记录是否是链接列
    boolean[] isShowImgColums = new boolean[sqlgrid.columnCount]; //记录是否是链接列
    boolean[] isimgTransitionColum = new boolean[sqlgrid.columnCount]; //记录是否是图像变化列
    boolean[] isprimary = new boolean[sqlgrid.columnCount]; //记录是否是主键列
    String[] linkcolumnName; //链接列数组
    String[] ShowImgColumName; //图片显示列数组
    String[] ImgTransitionColumName; //图片转换列数组
    int counter = 0; //计数器
    int recordCount = 0; //记录总数
    int pageSize = 10; //每页显示10条
    int pageCount = 0; //总页数
    int pageId = 1; //当前页
    //获取记录总数
    recordCount = sqlgrid.getrowcount();

    System.out.println("recordCount:" + recordCount);
    //计算总页数
    pageCount = ((recordCount % pageSize) == 0 ? (recordCount / pageSize) :
                 (recordCount / pageSize) + 1);

    int count = 1;
    //获取要显示的页数
    String strPage = req.getParameter("pageId");
    //为null默认跳转到第一页
    if(strPage == null)
    {
      pageId = 1;
    }
    //将显示的页数转为整型
    else
    {
      pageId = java.lang.Integer.parseInt(strPage);
    }

    if(pageId > recordCount)
    {
      pageId = recordCount;
    }
    if(recordCount > 0)
    {

      sqlgrid.absolute((pageId - 1) * pageSize + 1);

    }

    //设置是否是链接列数据组
    for(int i = 0; i < islink.length; i++)
    {
      islink[i] = this.isdLinkColum(sqlgrid.getColunmName(i));
    }
    /**
     * 此处修改　2004－12－27
     */
    //设置是否是图片链接列数据列
    for(int i = 0; i < isShowImgColums.length; i++)
    {
      isShowImgColums[i] = this.isShowImgColum(sqlgrid.getColunmName(i));
    }
    //设置是否是图片转换列数据列
    for(int i = 0; i < isimgTransitionColum.length; i++)
    {
      isimgTransitionColum[i] = this.isImgTransitionColums(sqlgrid.
          getColunmName(i));
    }

    /**
     * 注意：此处修改 2004-12-9
     * 如果没指定主键列，默认第一列是主键列
     */
    if(this.primaryKeys == null)
    {
      primaryKeys = new String[1];
      primaryKeys[0] = sqlgrid.getColunmName(0);
    }
    //设置是否是主键列数据组
    for(int j = 0; j < sqlgrid.columnCount; j++)
    {
      for(int p = 0; p < this.primaryKeys.length; p++)
      {
        isprimary[j] = sqlgrid.getColunmName(j).equals(primaryKeys[p]);
        if(isprimary[j])
        {
          break;
        }
      }
    }

    String Html = "<center><table cellSpacing=\"0\" "
        + "cellPadding=\"0\" align=\"center\" border=\"0\">"
        + " <thead>";

    //写表头

    if(this.isHiddenCheck)
    {
      Html += "<tr><th><a onclick=\"this.blur(); return sortTable('defTblBdy'," +
          counter + " , false);\""
          + " href=\"薛钧\">选择</th>";
      /**
       * 注意：此处修改 2004-12-9
       * 如果没指定列名,则列名默认为列1、列2、列3......
       */
      counter++;
    }
    if(this.columnsName == null)
    {
      columnsName = new String[sqlgrid.getcolumncount() - 1];
      for(int i = 1;
          i <
          sqlgrid.getcolumncount() - showImgColums.size() -
          imgTransitionColums.size();
          i++)
      {
        columnsName[i - 1] = "列" + i;
      }
    }
    //图片显示列名
    for(int i = 0; i < this.showImgColums.size(); i++)
    {
      String[] showImgColum = (String[])this.showImgColums.get(i);
      Html += "<th><a onclick=\"this.blur(); return sortTable('defTblBdy'," +
          counter + " , false);\""
          + " href=\"薛钧\">";
      Html += showImgColum[1];
      Html += "</th>";
      counter++;
    }

    for(int i = 0; i < this.columnsName.length; i++)
    {
      if(columnsName[i] != null)
      {
        Html += "<th><a onclick=\"this.blur(); return sortTable('defTblBdy'," +
            counter + " , false);\""
            + " href=\"薛钧\">";
        Html += columnsName[i];
        Html += "</th>";
        counter++;
      }

    }
    //图片转换列
    for(int i = 0; i < this.imgTransitionColums.size(); i++)
    {
      String[] imgTransitionColum = (String[])this.imgTransitionColums.get(i);
      Html += "<th><a onclick=\"this.blur(); return sortTable('defTblBdy'," +
          counter + " , false);\""
          + " href=\"薛钧\">";
      Html += imgTransitionColum[1];
      Html += "</th>";
      counter++;
    }

    //静态链接列名
    for(int i = 0; i < this.slinkeColums.size(); i++)
    {
      String[] slinkeColum = (String[])this.slinkeColums.get(i);
      Html += "<th><a onclick=\"this.blur(); return sortTable('defTblBdy'," +
          counter + " , false);\""
          + " href=\"薛钧\">";
      Html += slinkeColum[0];
      Html += "</th>";
      counter++;
    }

    Html += "</tr></thead> <tbody id=\"defTblBdy\">";

    /*    int recordCounter=0;
     while(test.nextrecord()&&count<=pageSize){*/

    /*表内容*/
    int recordCounter = 0;
    //if (pageId==1)
    //sqlgrid.beforeFirst();
    while(count <= pageSize)
    {
      if(sqlgrid.getrowcount() == 0)
      {
        break;
      }
      recordCounter++;
      count++;
      Html += "<tr> ";
      for(int j = 0; j <= sqlgrid.columnCount; j++)
      {

        if(j == 0 && this.isHiddenCheck)
        {
          /**
           * 第一列为复选框,name为CB,value为主键
           * 设置复选框id,id值为设该行的主键列值
           * id=sqlgrid.getstring(primaryKeys[k])
           */
          Html += "<td><input type=\"checkbox\" name=\"CB\" value=\"";
          for(int k = 0; k < this.primaryKeys.length; k++)
          {
            Html += sqlgrid.getstring(primaryKeys[k]);
            /*System.out.println(primaryKeys[k] + ":" +
                               sqlgrid.getstring(primaryKeys[k]) +
                               sqlgrid.getstring(j + 1));*/
            if(this.primaryKeys.length > 1)
            {
              Html += ",";
            }
          }
          Html += "\"></td>";
        }
        else
        {
          if(j == 0)
          {
            j = 1;
          }
          //判断动态链接列
          if(islink[j - 1])
          {
            //是，定位到链接详细内容数组
            for(int k = 0; k < this.dlinkeColums.size(); k++)
            {
              linkcolumnName = (String[])dlinkeColums.get(k);
              if(linkcolumnName[0].equals(sqlgrid.getColunmName(j - 1)))
              {
                //找到链接详细内容数组
                //   System.out.print(sqlgrid.getstring(j) + " ");

                /*注意:此处修改
                                 修改后将主键值放入链接字符串中*/
                Html += "<td>" + "<a href=\"" + linkcolumnName[1] + "?";

                for(int p = 0; p < this.primaryKeys.length; p++)
                {
                  Html += primaryKeys[p] + "=" +
                      sqlgrid.getstring(primaryKeys[p]);
                  if(this.primaryKeys.length > 1)
                  {
                    Html += ",";
                  }
                }
                //linkcolumnName[1]为链接URL地址
                Html += "\">" + "</a></td>";
                break;
              }
            }
          }
          /**
           * 此处为新增代码
           */
          if(isShowImgColums[j - 1])
          {

            //是，定位到图片显示列详细内容数组
            for(int k = 0; k < this.showImgColums.size(); k++)
            {
              ShowImgColumName = (String[])showImgColums.get(k);
              // System.out.println("进来");
              if(ShowImgColumName[0].equals(sqlgrid.getColunmName(j - 1)))
              {

                //  System.out.println("ShowImgColumName:" + ShowImgColumName[2]);
                //   System.out.println("sqlgrid.getstring(ShowImgColumName[0])" +
                //                 sqlgrid.getstring(ShowImgColumName[0]));
                if(sqlgrid.getstring(ShowImgColumName[0]).trim().equals(
                    ShowImgColumName[2]))
                {

                  Html += "<td>" + "<img src=\"" + ShowImgColumName[3] + "\">";
                  //  System.out.println("进来");

                }
                else
                {
                  Html += "<td>";
                }

                //linkcolumnName[1]为链接URL地址
                Html += "</td>";
                break;
              }
            }

          }

          if(isimgTransitionColum[j - 1])
          {
            //是，定位到图片显示列详细内容数组
            for(int k = 0; k < this.imgTransitionColums.size(); k++)
            {
              ImgTransitionColumName = (String[])imgTransitionColums.get(k);
              // System.out.println("进来");
              if(ImgTransitionColumName[0].equals(sqlgrid.getColunmName(j - 1)))
              {
                if(sqlgrid.getstring(ImgTransitionColumName[0]).trim().equals(
                    ImgTransitionColumName[2]))
                {
                  Html += "<td><a href=\"" + ImgTransitionColumName[4] + "?";

                  for(int p = 0; p < this.primaryKeys.length; p++)
                  {
                    Html += primaryKeys[p] + "=" +
                        sqlgrid.getstring(primaryKeys[p]);
                    if(this.primaryKeys.length > 1)
                    {
                      Html += ",";
                    }
                  }

                  Html += "&&UserStatus=0\"><img "
                      + " border=\"0\" src=\"" + ImgTransitionColumName[5]
                      + "\"></a>";

                }
                else if(sqlgrid.getstring(ImgTransitionColumName[0]).trim().
                        equals(
                    ImgTransitionColumName[3]))
                {
                  Html += "<td><a href=\"" + ImgTransitionColumName[4] + "?";

                  for(int p = 0; p < this.primaryKeys.length; p++)
                  {
                    Html += primaryKeys[p] + "=" +
                        sqlgrid.getstring(primaryKeys[p]);
                    if(this.primaryKeys.length > 1)
                    {
                      Html += ",";
                    }
                  }

                  Html += "&&UserStatus=1\"><img "
                      + " border=\"0\" src=\"" + ImgTransitionColumName[6]
                      + "\"></a>";

                }
                else
                {
                  Html += "<td>";
                }

                //linkcolumnName[1]为链接URL地址
                Html += "</td>";
                break;
              }
            }

          }

          //普通列内容
          else
          {

            if(!isprimary[j - 1] && !(isShowImgColums[j - 1]) &&
               !(isimgTransitionColum[j - 1]))
            {
              //   System.out.print(sqlgrid.getstring(j) + " ");
              Html += "<td>" + sqlgrid.getstring(j) + "</td>";
            }
          }

        }

        /* */

      }
      //静态列内容
      for(int n = 0; n < this.slinkeColums.size(); n++)
      {
        String[] slinkeColum = (String[])this.slinkeColums.get(n);
        if(slinkeColum[2].equals(""))
        {
          //文字静态列

          /*注意:此处修改
            修改后将主键值放入链接字符串中*/
          Html += "<td>" + "<a href=\"" + slinkeColum[1] + "?";

          for(int p = 0; p < this.primaryKeys.length; p++)
          {
            Html += primaryKeys[p] + "=" + sqlgrid.getstring(primaryKeys[p]);
            if(this.primaryKeys.length > 1)
            {
              Html += ",";
            }
          }
          //linkcolumnName[1]为链接URL地址
          Html += "\">" + slinkeColum[0] + "</a></td>";

          /**     //设置静态列链接地址和显示内容
               Html += "\"><a href=\"" + slinkeColum[1] + "\">" +
                   slinkeColum[0] + "</a></td>";**/
        }
        else
        {

          //设置图像静态列URL
          Html += "<td><a href=\"" + slinkeColum[1] + "?";

          /*注意:此处修改
            修改后将主键值放入链接字符串中*/
          for(int p = 0; p < this.primaryKeys.length; p++)
          {
            Html += primaryKeys[p] + "=" + sqlgrid.getstring(primaryKeys[p]);
            if(this.primaryKeys.length > 1)
            {
              Html += ",";
            }
          }
          Html +=
              "\"><img border=\"0\" src=\"" +
              slinkeColum[2] + "\"></a></td>";
        }
      }
      Html += "</tr>";
      //  System.out.println();
      if(sqlgrid.nextrecord() == false)
      {
        break;
      }
    }
    //数据读入完毕
    sqlgrid.close();
    //收尾
    Html += "</tbody></table></center>";

    /*
      if(pageCount>1){
         if(pageId==1){ out.print("<font color=\"#999999\">首页 上一页</font>"); }else{  %>
     <a href="pagetest.jsp?pageId=1">首页</a> <a href="pagetest.jsp?pageId=<%=pageId-1%>">上一页</a>
                          <%}%>
                          <%if(pageId>=pageCount){out.print("<font color=\"#999999\">下一页 尾页</font>");}else{  %>
      <a href="pagetest.jsp?pageId=<%=pageId+1%>">下一页</a> <a
     href="pagetest.jsp?pageId=<%=pageCount%>">尾页</a>
                          <%}}else{
     out.print("<font color=\"#999999\">首页 上一页 下一页 尾页</font>");
     }
         %>
     */

    try
    {
      out.print(Html);
      out.print("<form><center>");
      if(pageCount > 1)
      {
        if(pageId == 1)
        {
          out.print("<font color=\"#999999\">首页 上一页</font>");
        }
        else
        {
          out.print("<a href=\"" + jspName + "?pageId=1\">首页</a> <a href=\"" +
                    jspName + "?pageId=" + (pageId - 1) + "\">上一页</a>");

        }

        if(pageId >= pageCount)
        {
          out.print("<font color=\"#999999\">下一页 尾页</font>");
        }
        else
        {
          out.print("<a href=\"" + jspName + "?pageId=" + (pageId + 1) +
                    "\">下一页</a> <a "
                    + "href=\"" + jspName + "?pageId=" + pageCount +
                    "\">尾页</a>");
        }
      }
      else
      {
        out.print("<font color=\"#999999\">首页 上一页 下一页 尾页</font>");
      }
      out.print("</center></form>");
      Html = null;

    }
    catch(java.io.IOException je)
    {
      throw new JspException(je);
    }

    return "";
  }

  public static void main(String[] args)
  {
    //实例化grid
    grid test = new grid("select * from huida");
    //加修改列
    test.addLinkColum("修改","dd","");
    //表头数组
    String[] ColumnsName =
        {
        "外键","回答人","回答内容","日期"};
    //主键数组
    String[] PriKeys =
        {
        "h_id"};
    //设置表头
    test.setColumnName(ColumnsName);
    //设置主键
    test.setPriKey(PriKeys);
    // System.out.println(test.getGridHtml());
  }

}