linkdb.java

来自「一个用java编写的功能强大的OA系统」· Java 代码 · 共 402 行

package cn.js.fan.module.nav;

import cn.js.fan.base.ObjectDb;
import java.sql.ResultSet;
import java.sql.SQLException;
import cn.js.fan.db.PrimaryKey;
import cn.js.fan.util.ErrMsgException;
import cn.js.fan.db.Conn;
import java.sql.PreparedStatement;
import com.redmoon.kit.util.FileUpload;
import java.util.Vector;
import com.redmoon.kit.util.FileInfo;
import java.util.Calendar;
import java.io.File;


public class LinkDb extends ObjectDb {
    private int id;
    public static final String KIND_DEFAULT = "default";
    public static final String KIND_SHOP = "shop";
    public static final String USER_SYSTEM = "system";
    public static final String KIND_USER_BLOG = "user_blog";

    public LinkDb() {
        super();
    }

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

    private String kind;

    public LinkDb getLinkDb(int id) {
        return (LinkDb)getObjectDb(new Integer(id));
    }

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

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

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

    public boolean save() throws ErrMsgException {
        
        Conn conn = new Conn(connname);
        PreparedStatement pstmt = null;
        try {
            pstmt = conn.prepareStatement(this.QUERY_SAVE);
            pstmt.setString(1, url);
            pstmt.setString(2, title);
            pstmt.setString(3, image);
            pstmt.setString(4, userName);
            pstmt.setInt(5, sort);
            pstmt.setString(6, kind);
            pstmt.setInt(7, id);
            if (conn.executePreUpdate() == 1) {
                LinkCache mc = new LinkCache(this);
                primaryKey.setValue(new Integer(id));
                mc.refreshSave(primaryKey);
                return true;
            }
            else
                return false;
        } catch (SQLException e) {
            logger.error(e.getMessage());
            throw new ErrMsgException("更新链接时出错！");
        } finally {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        }
    }

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

    public void load() {
        
        Conn conn = new Conn(connname);
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        try {
            pstmt = conn.prepareStatement(this.QUERY_LOAD);
            pstmt.setInt(1, id);
            
            rs = conn.executePreQuery();
            if (rs.next()) {
                this.url = rs.getString(1);
                this.title = rs.getString(2);
                this.image = rs.getString(3);
                this.userName = rs.getString(4);
                this.sort = rs.getInt(5);
                this.kind = rs.getString(6);
                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) {
                LinkCache mc = new LinkCache(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) {
                
                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);
                
                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, url);
            pstmt.setString(2, title);

            image = writeImage(fu);
            pstmt.setString(3, image);

            pstmt.setString(4, userName);
            pstmt.setInt(5, sort+1);
            pstmt.setString(6, kind);
            re = conn.executePreUpdate() == 1 ? true : false;
            if (re) {
                LinkCache mc = new LinkCache(this);
                mc.refreshCreate();
            }
        } catch (SQLException e) {
            logger.error("create:" + e.getMessage());
            throw new ErrMsgException("插入Link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 void setUrl(String url) {
        this.url = url;
    }

    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 String getUrl() {
        return url;
    }

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

    public String getImage() {
        return image;
    }

    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);
                    LinkDb ldb = getLinkDb(id);
                    ldb.setSort(ldb.getSort()+1);
                    ldb.save();
                }
                
                
                
                
                
                LinkDb ldb = getLinkDb(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);
                        LinkDb ldb = getLinkDb(id);
                        ldb.setSort(ldb.getSort()-1);
                        ldb.save();
                    }
                    
                    
                    
                    
                    
                    LinkDb ldb = getLinkDb(id);
                    ldb.setSort(ldb.getSort()+1);
                    ldb.save();
                    
                    
                    
                    
                    
                }
                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 link 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;
    }

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