dbssort.java

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package com.dao;

import java.sql.*;
import java.util.*;
import javax.servlet.http.HttpServletRequest;
import com.core.Database;
import com.core.FinalConstants;
import com.core.ParamUtils;
import com.model.Ssort;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2008</p>
 * <p>Company: MR</p>
 * @version 1.0
 */

public class Dbssort extends Ssort {
    private Ssort s=new Ssort();
    public Dbssort() {
    }
    public Dbssort(String sql) {
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            con = Database.getConnection();
            ps = con.prepareStatement(FinalConstants.SELECT_SSORT + sql,
                                      ResultSet.TYPE_SCROLL_INSENSITIVE,
                                      ResultSet.CONCUR_READ_ONLY);
            rs = ps.executeQuery();
            if (rs.next()) {
                s.setSid(rs.getInt("sid"));
                s.setName(ParamUtils.getSqlString(rs.getString("name")));
                s.setResume(ParamUtils.getSqlString(rs.getString("resume")));
            }
        } catch (SQLException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        } finally {
            System.out.println(ps + " Dbssort(String sql) " + s.getSid());
            try {
                if (ps != null) {
                    ps.close();
                    ps = null;
                }
            } catch (SQLException e) {
                ps = null;
            }
            try {
                if (con != null) {
                    con.close();
                    con = null;
                }
            } catch (SQLException e) {
                con = null;
            }
        }
    }

    public Dbssort(HttpServletRequest request) {
        s.setName(ParamUtils.getRequestString(request, "name"));
        s.setResume(ParamUtils.getRequestString(request, "resume"));
    }
    public boolean Insert() {
        boolean b = false;
        Connection con = null;
        PreparedStatement ps = null;
        try {
            con = Database.getConnection();
            ps = con.prepareStatement(FinalConstants.INSERT_SSORT);
            ps.setString(1, s.getName());
            ps.setString(2, s.getResume());
            if (ps.executeUpdate() > 0) {
                b = true;
            } else {
                b = false;
            }
        } catch (SQLException e) {
            b = false;
            System.out.println(e.getMessage());
            e.printStackTrace();
        } finally {
            System.out.println(ps + " Dbssort.Insert()");
            try {
                if (ps != null) {
                    ps.close();
                }
            } catch (SQLException e) {
                ps = null;
            }
            try {
                if (con != null) {
                    con.close();
                }
            } catch (SQLException e) {
                con = null;
            }
        }
        return b;
    }

    public Collection Select(String sql) {
        Collection coll = new ArrayList();
        Connection con = null;
        ResultSet rs = null;
        PreparedStatement ps = null;
        try {
            con = Database.getConnection();
            ps = con.prepareStatement(FinalConstants.SELECT_SSORT + sql);
            rs = ps.executeQuery();
            while (rs.next()) {
                Ssort link = new Ssort();
                link.setSid(rs.getInt("sid"));
                link.setName(ParamUtils.getSqlString(rs.getString("name")));
                link.setResume(ParamUtils.getSqlString(rs.getString("resume")));
                coll.add(link);
            }
        } catch (SQLException ex) {
            System.out.println(ex.getMessage());
        } finally {
            System.out.println(ps + " Dbssort.Select(String sql) ");
            try {
                if (ps != null) {
                    ps.close();
                    ps = null;
                }
            } catch (SQLException e) {
                ps = null;
            }
            try {
                if (con != null) {
                    con.close();
                    con = null;
                }
            } catch (SQLException e) {
                con = null;
            }
        }
        return coll;
    }

    //页数+SQL条件
    public Collection Select(int page, String sql) {
        Collection coll = new ArrayList();
        Connection con = null;
        ResultSet rs = null;
        PreparedStatement ps = null;
        int tip = FinalConstants.STEP * (page - 1);
        try {
            con = Database.getConnection();
            ps = con.prepareStatement(FinalConstants.SELECT_SSORT + sql);
            rs = ps.executeQuery();
            if (tip <= 0) {
                rs.beforeFirst();
            } else {
                if (!rs.absolute(tip)) {
                    rs.beforeFirst();
                }
            }
            for (int i = 1; rs.next() && i <= FinalConstants.STEP; i++) {
                Ssort link = new Ssort();
                link.setSid(rs.getInt("sid"));
                link.setName(ParamUtils.getSqlString(rs.getString("name")));
                link.setResume(ParamUtils.getSqlString(rs.getString("resume")));
                coll.add(link);
            }
        } catch (SQLException ex) {
            System.out.println(ex.getMessage());
        } finally {
            System.out.println(ps + " Dbssort.Select(int page,String sql) ");
            try {
                if (ps != null) {
                    ps.close();
                    ps = null;
                }
            } catch (SQLException e) {
                ps = null;
            }
            try {
                if (con != null) {
                    con.close();
                    con = null;
                }
            } catch (SQLException e) {
                con = null;
            }
        }
        return coll;
    }
    private boolean Update() {
        boolean b = false;
        Connection con = null;
        PreparedStatement ps = null;
        try {
            con = Database.getConnection();
            ps = con.prepareStatement(FinalConstants.UPDATE_SSORT);
            ps.setString(1,  s.getName());
            ps.setString(2, s.getResume());
            ps.setInt(3, s.getSid());
            if (ps.executeUpdate() > 0) {
                b = true;
            } else {
                b = false;
            }
        } catch (SQLException e) {
            b = false;
            e.printStackTrace();
        } finally {
            System.out.println(ps + " Dbaffiche.Update() ");
            try {
                if (ps != null) {
                    ps.close();
                }
            } catch (SQLException e) {
                ps = null;
            }
            try {
                if (con != null) {
                    con.close();
                }
            } catch (SQLException e) {
                con = null;
            }
        }
        return b;
    }

    public int getSid() {
        return s.getSid();
    }
    public void setSid(int sid) {
        s.setSid(sid);
    }
    public String getName() {
        return s.getName();
    }
    public void setName(String name) {
        s.setName(name);
        Update();
    }
    public String getResume() {
        return s.getResume();
    }
    public void setResume(String resume) {
        s.setResume(resume);
        Update();
    }
}