photodb.java

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package cn.js.fan.module.photo;

import java.io.*;
import java.sql.*;
import java.util.*;

import cn.js.fan.base.*;
import cn.js.fan.db.*;
import cn.js.fan.util.*;
import com.redmoon.kit.util.FileInfo;
import com.redmoon.kit.util.FileUpload;
import com.redmoon.forum.SequenceMgr;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class PhotoDb extends ObjectDb {
    private int id;
    public static final String KIND_DEFAULT = "default";
    public static final String KIND_USER_BLOG_PHOTO = "user_blog_photo";

    public static final String USER_SYSTEM = "system";

    public PhotoDb() {
        super();
    }

    public PhotoDb(int id) {
        this.id = id;
        init();
        load();
    }

    private String kind;

    public PhotoDb getPhotoDb(int id) {
        return (PhotoDb)getObjectDb(new Integer(id));
    }

    public ObjectDb getObjectRaw(PrimaryKey pk) {
        return new PhotoDb(pk.getIntValue());
    }

    public void initDB() {
        this.tableName = "photo";
        primaryKey = new PrimaryKey("id", PrimaryKey.TYPE_INT);
        objectCache = new PhotoCache(this);

        this.QUERY_DEL =
                "delete FROM " + tableName + " WHERE id=?";
        this.QUERY_CREATE =
                "INSERT into " + tableName + " (title,image,userName,sort,kind,addDate,id) VALUES (?,?,?,?,?,?,?)";
        this.QUERY_LOAD =
                "SELECT title,image,userName,sort,kind,addDate FROM " + tableName + " WHERE id=?";
        this.QUERY_SAVE =
                "UPDATE " + tableName + " SET title=?,image=?,userName=?,sort=?,kind=? WHERE id=?";
        isInitFromConfigDB = false;
    }

    public boolean save() throws ErrMsgException {
        // Based on the id in the object, get the message data from the database.
        Conn conn = new Conn(connname);
        PreparedStatement pstmt = null;
        try {
            pstmt = conn.prepareStatement(this.QUERY_SAVE);
            pstmt.setString(1, title);
            pstmt.setString(2, image);
            pstmt.setString(3, userName);
            pstmt.setInt(4, sort);
            pstmt.setString(5, kind);
            pstmt.setInt(6, id);
            if (conn.executePreUpdate() == 1) {
                PhotoCache mc = new PhotoCache(this);
                primaryKey.setValue(new Integer(id));
                mc.refreshSave(primaryKey);
                return true;
            }
            else
                return false;
        } catch (SQLException e) {
            logger.error("save:" + e.getMessage());
            throw new ErrMsgException("更新时出错！");
        } finally {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
    }

    public boolean save(FileUpload fu) throws ErrMsgException {
        // 删除图片
        delImage(fu.getRealPath());
        image = writeImage(fu);
        return save();
    }

    public void load() {
        // Based on the id in the object, get the message data from the database.
        Conn conn = new Conn(connname);
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        try {
            pstmt = conn.prepareStatement(this.QUERY_LOAD);
            pstmt.setInt(1, id);
            //url,title,image,userName,sort,kind
            rs = conn.executePreQuery();
            if (rs.next()) {
                this.title = rs.getString(1);
                this.image = rs.getString(2);
                this.userName = rs.getString(3);
                this.sort = rs.getInt(4);
                this.kind = rs.getString(5);
                java.util.Date d = null;
                try {
                    DateUtil.parse(rs.getString(6));
                }
                catch (Exception e) {

                }
                addDate = DateUtil.format(d, "yyyy-MM-dd HH:mm:ss");
                primaryKey.setValue(new Integer(id));
            }
        } catch (SQLException e) {
            logger.error(e.getMessage());
        } finally {
            if (rs != null) {
                try {
                    rs.close();
                } catch (Exception e) {}
                rs = null;
            }
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
    }

    public boolean del() throws ErrMsgException {
        Conn conn = null;
        try {
            conn = new Conn(connname);
            PreparedStatement pstmt = conn.prepareStatement(this.QUERY_DEL);
            pstmt.setInt(1, id);
            if (conn.executePreUpdate()==1) {
                PhotoCache mc = new PhotoCache(this);
                mc.refreshDel(primaryKey);
                return true;
            }
            else
                return false;
        } catch (SQLException e) {
            logger.error(e.getMessage());
            throw new ErrMsgException("删除出错！");
        } finally {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
    }

    public boolean del(String realPath) throws
            ErrMsgException {
        boolean re = del();
        if (re)
            delImage(realPath);
        return re;
    }

    public void delImage(String realPath) {
        if (image != null && !image.equals("")) {
            try {
                File file = new File(realPath + image);
                file.delete();
            } catch (Exception e) {
                logger.info(e.getMessage());
            }
        }
    }

    public String writeImage(FileUpload fu) {
        if (fu.getRet() == fu.RET_SUCCESS) {
            Vector v = fu.getFiles();
            FileInfo fi = null;
            if (v.size() > 0)
                fi = (FileInfo) v.get(0);
            String vpath = "";
            if (fi != null) {
                // 置保存路径
                Calendar cal = Calendar.getInstance();
                String year = "" + (cal.get(cal.YEAR));
                String month = "" + (cal.get(cal.MONTH) + 1);
                vpath = "upfile/" +
                        fi.getExt() + "/" + year + "/" + month + "/";
                String filepath = fu.getRealPath() + vpath;
                fu.setSavePath(filepath);
                // 使用随机名称写入磁盘
                fu.writeFile(true);
                return vpath + fi.getDiskName();
            }
        }
        return "";
    }

    public boolean create(FileUpload fu) throws ErrMsgException {
        Conn conn = null;
        sort = getMaxOrders(userName, kind);
        boolean re = false;
        try {
            conn = new Conn(connname);
            PreparedStatement pstmt = conn.prepareStatement(this.QUERY_CREATE);
            pstmt.setString(1, title);

            image = writeImage(fu);
            pstmt.setString(2, image);

            pstmt.setString(3, userName);
            pstmt.setInt(4, sort+1);
            pstmt.setString(5, kind);
            pstmt.setString(6, "" + System.currentTimeMillis());
            id = (int)SequenceMgr.nextID(SequenceMgr.PHOTO);
            pstmt.setInt(7, id);
            re = conn.executePreUpdate() == 1 ? true : false;
            if (re) {
                PhotoCache mc = new PhotoCache(this);
                mc.refreshCreate();
            }
        } catch (SQLException e) {
            logger.error("create:" + e.getMessage());
            throw new ErrMsgException("插入Photo时出错！");
        } finally {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
        return re;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public void setSort(int sort) {
        this.sort = sort;
    }

    public void setKind(String kind) {
        this.kind = kind;
    }

    public int getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }

    public String getUserName() {
        return userName;
    }

    public int getSort() {
        return sort;
    }

    public String getKind() {
        return kind;
    }

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

    public String getImage() {
        return image;
    }

    public String getAddDate() {
        return addDate;
    }

    public boolean move(String direction) {
        Conn conn = new Conn(connname);
        boolean re = false;
        try {
            if (direction.equals("up")) {
                if (sort == 0)
                    return true;
                String sql = "select id from " + tableName + " where sort=? and userName=? and kind=?";;
                ResultSet rs = null;
                PreparedStatement ps = conn.prepareStatement(sql);
                ps.setInt(1, sort-1);
                ps.setString(2, userName);
                ps.setString(3, kind);
                rs = conn.executePreQuery();
                while (rs.next()) {
                    int id = rs.getInt(1);
                    PhotoDb ldb = getPhotoDb(id);
                    ldb.setSort(ldb.getSort()+1);
                    ldb.save();
                }
                //sql = "update link set sort=sort+1 where sort=" +
                //             (sort - 1) + ";";
                //sql += "update link set sort=sort-1 where id=" +
                //        id;
                //conn.executeUpdate(sql);
                PhotoDb ldb = getPhotoDb(id);
                ldb.setSort(ldb.getSort()-1);
                ldb.save();
                re = true;
            } else {
                int maxorders = getMaxOrders(userName, kind);
                if (sort == maxorders) {
                    return true;
                } else {
                    String sql = "select id from " + tableName + " where sort=? and userName=? and kind=?";
                    ResultSet rs = null;
                    PreparedStatement ps = conn.prepareStatement(sql);
                    ps.setInt(1, sort+1);
                    ps.setString(2, userName);
                    ps.setString(3, kind);
                    rs = conn.executePreQuery();
                    while (rs.next()) {
                        int id = rs.getInt(1);
                        PhotoDb ldb = getPhotoDb(id);
                        ldb.setSort(ldb.getSort()-1);
                        ldb.save();
                    }
                    //sql = "update link set sort=sort+1 where sort=" +
                    //             (sort - 1) + ";";
                    //sql += "update link set sort=sort-1 where id=" +
                    //        id;
                    //conn.executeUpdate(sql);
                    PhotoDb ldb = getPhotoDb(id);
                    ldb.setSort(ldb.getSort()+1);
                    ldb.save();
                    //String sql = "update link set sort=sort-1 where sort=" +
                    //             (sort + 1) + ";";
                    //sql += "update link set sort=sort+1 where id=" +
                    //        id;
                    //conn.executeUpdate(sql);
                }
                re = true;
            }
        } catch (Exception e) {
            logger.error(e.getMessage());
        } finally {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
        return re;
    }

    public int getMaxOrders(String userName, String kind) {
        Conn conn = new Conn(connname);
        ResultSet rs = null;
        int maxorders = -1;
        try {
            String GETMAXORDERS = "select max(sort) from " + tableName + " where userName=? and kind=?";
            PreparedStatement pstmt = conn.prepareStatement(GETMAXORDERS);
            pstmt.setString(1, userName);
            pstmt.setString(2, kind);
            rs = conn.executePreQuery();
            if (rs != null) {
                if (rs.next()) {
                    maxorders = rs.getInt(1);
                }
            }
        } catch (SQLException e) {
            logger.error(e.getMessage());
        } finally {
            if (rs != null) {
                try {
                    rs.close();
                } catch (Exception e) {}
                rs = null;
            }
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
        return maxorders;
    }

    public ListResult ListPhotos(String listsql, int curPage, int pageSize) throws
            ErrMsgException {
        int total = 0;
        ResultSet rs = null;
        Vector result = new Vector();
        Conn conn = new Conn(connname);
        try {
            // 取得总记录条数
            String countsql = SQLFilter.getCountSql(listsql);
            rs = conn.executeQuery(countsql);
            if (rs != null && rs.next()) {
                total = rs.getInt(1);
            }
            if (rs != null) {
                rs.close();
                rs = null;
            }

            if (total != 0)
                conn.setMaxRows(curPage * pageSize); // 尽量减少内存的使用

            rs = conn.executeQuery(listsql);
            if (rs == null) {
                return null;
            } else {
                rs.setFetchSize(pageSize);
                int absoluteLocation = pageSize * (curPage - 1) + 1;
                if (rs.absolute(absoluteLocation) == false) {
                    return null;
                }
                do {
                    PhotoDb ug = getPhotoDb(rs.getInt(1));
                    result.addElement(ug);
                } while (rs.next());
            }
        } catch (SQLException e) {
            logger.error("ListPhotos:" + e.getMessage());
            throw new ErrMsgException("数据库出错！");
        } finally {
            if (rs != null) {
                try {
                    rs.close();
                } catch (Exception e) {}
                rs = null;
            }
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
        ListResult lr = new ListResult();
        lr.setResult(result);
        lr.setTotal(total);
        return lr;
    }

    private String title;
    private String image = "";
    private String userName;
    private int sort;
    private String addDate;
}