assetmodel.java

java课程的资料以及实验的代码

/*
 *AssetModel.java：建立固定资产实体类。
 *包括：与数据库进行增、删、改、查操作。
 */
 
import java.sql.*;
import java.math.*;

public class AssetModel {
   String assetid;
   String assetname;
   String cateid;
   String subcateid;
   String model;
   String price;
   String purchasedate;
   String status;
   String useby;
   String remarks;
   DbConn dbc;
   Connection conn;
   public AssetModel() {
   }
   public AssetModel(String s0,
                     String s1,
                     String s2,
                     String s3,
                     String s4,
                     String s5,
                     String s6,
                     String s7,
                     String s8,
                     String s9) {
   	assetid = s0;
   	assetname = s1;
   	cateid = s2;
   	subcateid = s3;
   	model = s4;
   	price = s5;
   	purchasedate = s6;
   	status = s7;
   	useby = s8;
   	remarks = s9;
   }
   
   public void setAll(String s1,
                     String s4,
                     String s5,
                     String s6,
                     String s7,
                     String s8,
                     String s9) {
        assetname = s1;             	
   	model = s4;
   	price = s5;
   	purchasedate = s6;
   	status = s7;
   	useby = s8;
   	remarks = s9;
   }
   
   public String getAssetId() {
   	return assetid;
   }
   public String getAssetName() {
   	return assetname;
   }
   public String getCateId() {
   	return cateid;
   }
   public String getSubCateId() {
   	return subcateid;
   }
   public String getModel() {
   	return model;
   }
   public String getPrice() {
   	return price;
   }
   public String getPurchaseDate() {
   	return purchasedate;
   }
   public String getStatus() {
   	return status;
   }
   public String getUseby() {
   	return useby;
   }
   public String getRemarks() {
   	return remarks;
   }
   public void insert() {
      dbc = new DbConn();
      conn = dbc.getConnection();
      try {
      Statement stmt = conn.createStatement();
      ResultSet rset = stmt.executeQuery ("select max(assetid)+1 from asset");
      while (rset.next()) {
      	assetid = rset.getString(1);
      }
      if (assetid == null) assetid = "1";
      PreparedStatement pstmt = 
      conn.prepareStatement("insert into ASSET (assetid,asset_name,cateid,subcateid,model,price,purchase_date,status,useby,remarks) values (?,?,?,?,?,?,?,?,?,?)");
      pstmt.setInt(1, Integer.parseInt(assetid));          
      pstmt.setString(2, assetname);   
      pstmt.setInt(3, Integer.parseInt(cateid));
      pstmt.setInt(4, Integer.parseInt(subcateid));
      pstmt.setString(5, model);
      pstmt.setFloat(6, Float.parseFloat(price));
      pstmt.setString(7, purchasedate);
      pstmt.setString(8, status);
      pstmt.setString(9, useby);
      pstmt.setString(10, remarks);
      pstmt.execute();
      
  /*    PreparedStatement pstmt1 = 
      conn.prepareStatement("insert into LEND (assetid) values (?)");
      pstmt1.setInt(1, Integer.parseInt(assetid));          
      pstmt1.execute();*/
      
      conn.commit();
      conn.close();
      }
      catch (java.sql.SQLException s) {
	System.out.println("exception: " + s.getMessage());
      }
   }
   
   public void select() {
      String sql;
      dbc = new DbConn();
      conn = dbc.getConnection();
      sql = "SELECT assetid,rtrim(asset_name),cateid,subcateid,rtrim(model),price,purchase_date,status,useby,rtrim(remarks) FROM asset where assetid = "+Integer.parseInt(assetid);
      try {
      Statement stmt = conn.createStatement();
      ResultSet rset = stmt.executeQuery (sql);
      while (rset.next()) {
      	        assetname = rset.getString(2);
		cateid = rset.getString(3);
		subcateid = rset.getString(4);
		model = rset.getString(5);
		price = rset.getString(6);
		purchasedate = rset.getString(7);
		status = rset.getString(8);
		useby = rset.getString(9);
		remarks = rset.getString(10);
      }
      conn.commit(); 
      rset.close();
      stmt.close();
      conn.close();
      }
      catch (java.sql.SQLException s) {
	System.out.println("exception: " + s.getMessage());
      }
    } 
    
    public void update() {
      dbc = new DbConn();
      conn = dbc.getConnection();
      try {
      PreparedStatement pstmt = 
      conn.prepareStatement("update ASSET set asset_name=?,model=?,price=?,purchase_date=?,status=?,useby=?,remarks=? where assetid = ?");
      pstmt.setString(1, assetname);          
      pstmt.setString(2, model);   
      pstmt.setFloat(3, Float.parseFloat(price));
      pstmt.setString(4, purchasedate);
      pstmt.setString(5, status);
      pstmt.setString(6, useby);
      pstmt.setString(7, remarks);
      pstmt.setInt(8, Integer.parseInt(assetid));
      pstmt.execute();
      
      conn.commit();
      conn.close();
      }
      catch (java.sql.SQLException s) {
	System.out.println("exception: " + s.getMessage());
      }
   }
   
   public void delete() {
      dbc = new DbConn();
      conn = dbc.getConnection();
      String sql = "delete asset where assetid = "+Integer.parseInt(assetid) ;
      try {
      PreparedStatement pstmt = conn.prepareStatement(sql);
      pstmt.execute();
  /*    String sql1 = "delete lend where assetid = "+Integer.parseInt(assetid) ;
      PreparedStatement pstmt1 = conn.prepareStatement(sql1);
      pstmt1.execute();*/
      
      conn.commit();
      conn.close();
      
      assetid = null;
      assetname = null;
      cateid = "";
      subcateid = "";
      model = null;
      price = null;
      purchasedate = null;
      status = "";
      useby = null;
      remarks = null;
      
      }
      catch (java.sql.SQLException s) {
	System.out.println("exception: " + s.getMessage());
      }
   }
}