![Create a JAVA program that performs file IO and database interaction via SQL. The program
needs to read data from the provided file: "Project.csv" and insert the data into a database. Then
the program needs to create a report from the database sorted by price descending. The report
should be in the format demonstrated below.
id (primary key - generated by the database)
cpuname
performance
price
Project.csv contents:CPU NamePerformancePrice (USD)Intel Core i7-3770K @
3.50GHz9,556$560.50Intel Core i7-3770 @ 3.40GHz9,327$335.55Intel Core i7-3820 @
3.60GHz8,990$404.38AMD FX-8350 Eight-Core8,940$149.99Intel Core i7-2600K @
3.40GHz8,501$379.97Intel Core i7-2600 @ 3.40GHz8,242$214.99Intel Core i7-4720HQ @
2.60GHz8,046NAAMD FX-8320 Eight-Core8,008$145.99Intel Core i7-6700HQ @
2.60GHz7,997$1509Intel Core i7-4710HQ @ 2.50GHz7,826NAIntel Core i5-6600K @
3.50GHz7,762$239.99Intel Core i7-4700HQ @ 2.40GHz7,754$383.00Intel Core i7-4700MQ
@ 2.40GHz7,736$467.40Intel Core i5-4690K @ 3.50GHz7,690$239.99AMD FX-8150 Eight-
Core7,619$165.99Intel Core i7-3630QM @ 2.40GHz7,604$304.49Intel Core i5-4670K @
3.40GHz7,598$249.99Intel Core i5-4690 @ 3.50GHz7,542$224.99Intel Core i7-3610QM @
2.30GHz7,460$399.99Intel Core i5-4670 @ 3.40GHz7,342$226.99Intel Core i5-4590 @
3.30GHz7,174$199.99Intel Core i7-4702MQ @ 2.20GHz7,146NAIntel Core i5-3570K @
3.40GHz7,130$477.23
Solution
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Arrays;
public class Main
{
/**
* This the main function that runs at the start
* param args - input arguments from the command line
*/
static public void main(String[] args)](https://image.slidesharecdn.com/createajavaprogramthatperformsfileioanddatabaseinteraction-230702085858-9b2b3937/85/Create-a-JAVA-program-that-performs-file-IO-and-database-interaction-pdf-1-320.jpg)
![* param dPrice - price of the CPU
*/
public CPU(String strCPUName, int iPerformance, double dPrice)
{
m_strCPUName = strCPUName;
m_dPerformance = (double)iPerformance;
m_dPrice = dPrice;
m_dValue = m_dPerformance / m_dPrice; //Performance / Price
m_bValid = true;
}
/**
* param m_strCPULine - the input file line to be parsed
* return Indicate if the ParseCPULin succeeded or not
*/
private boolean ParseCPULine(String m_strCPULine)
{
boolean bRetValue = true;
String strTemp;
String strNumeric;
//Use a regular expression to parse the line into the individual members
//TODO - Figure out why regex not working for 1,509.00
//messes up on the comma in the value
String[] tokens = m_strCPULine.split(",(?=([^"]*"[^"]*")*[^"]*$)");
//http://rubular.com/ is helpful for regex
//Do we have the correct number of tokens from the split. If not then mark as invalid
if(tokens.length != 3)
{
bRetValue = false;
}
m_strCPUName = tokens[0];
//Get the performance
try
{
strTemp = tokens[1];
strNumeric = strTemp.replaceAll("[^0-9.]+", ""); //Get rid of non digit characters
m_dPerformance = Double.parseDouble(strNumeric);](https://image.slidesharecdn.com/createajavaprogramthatperformsfileioanddatabaseinteraction-230702085858-9b2b3937/85/Create-a-JAVA-program-that-performs-file-IO-and-database-interaction-pdf-6-320.jpg)
![}
catch(NumberFormatException ex)
{
m_dPerformance = NA_VALUE;
bRetValue = false;
}
//Get the price
try
{
strTemp = tokens[2];
strNumeric = strTemp.replaceAll("[^0-9.]+", ""); //Get rid of non digit characters
m_dPrice = Double.parseDouble(strNumeric);
}
catch(NumberFormatException ex)
{
m_dPrice = NA_VALUE; //Bogus Value
bRetValue = false;
}
//If we have valid Performance and Price values then return the calculated value otherwise
set to zero
if(bRetValue)
{
m_dValue = m_dPerformance / m_dPrice;
}
else
{
m_dValue = 0.0;
}
// for(String strTemp1 : tokens)
// {
// System.out.printf("%st", strTemp1);
// }
//
// System.out.printf(" ");
return bRetValue;
}](https://image.slidesharecdn.com/createajavaprogramthatperformsfileioanddatabaseinteraction-230702085858-9b2b3937/85/Create-a-JAVA-program-that-performs-file-IO-and-database-interaction-pdf-7-320.jpg)
![/**
* return A string representing the CPU
*/
public String toString()
{
return String.format("[%b]t%stt[%5.2f]t[%5.2f] ", m_bValid, m_strCPUName,
m_dPerformance, m_dPrice);
//return String.format("%s ", m_strCPULine); //Just return the original line
}
/**
* Getter
* return the performance as an double
*/
public double getPerformance(){return(m_dPerformance);};
/**
* Getter
* return the price as a double
*/
public double getPrice(){return(m_dPrice);};
/**
* Getter
* return the value as a double
*/
public double getValue(){return(m_dValue);};
/**
* Getter
* return the CPU Name
*/
public String getCpuName(){return(m_strCPUName);};
/**
* return if the cpu's line was parsed with all valid values for the fields or not
*/
public boolean getValid(){return(m_bValid);};
}](https://image.slidesharecdn.com/createajavaprogramthatperformsfileioanddatabaseinteraction-230702085858-9b2b3937/85/Create-a-JAVA-program-that-performs-file-IO-and-database-interaction-pdf-8-320.jpg)
Create a JAVA program that performs file IO and database interaction.pdf
- 1. Create a JAVA program that performs file IO and database interaction via SQL. The program needs to read data from the provided file: "Project.csv" and insert the data into a database. Then the program needs to create a report from the database sorted by price descending. The report should be in the format demonstrated below. id (primary key - generated by the database) cpuname performance price Project.csv contents:CPU NamePerformancePrice (USD)Intel Core i7-3770K @ 3.50GHz9,556$560.50Intel Core i7-3770 @ 3.40GHz9,327$335.55Intel Core i7-3820 @ 3.60GHz8,990$404.38AMD FX-8350 Eight-Core8,940$149.99Intel Core i7-2600K @ 3.40GHz8,501$379.97Intel Core i7-2600 @ 3.40GHz8,242$214.99Intel Core i7-4720HQ @ 2.60GHz8,046NAAMD FX-8320 Eight-Core8,008$145.99Intel Core i7-6700HQ @ 2.60GHz7,997$1509Intel Core i7-4710HQ @ 2.50GHz7,826NAIntel Core i5-6600K @ 3.50GHz7,762$239.99Intel Core i7-4700HQ @ 2.40GHz7,754$383.00Intel Core i7-4700MQ @ 2.40GHz7,736$467.40Intel Core i5-4690K @ 3.50GHz7,690$239.99AMD FX-8150 Eight- Core7,619$165.99Intel Core i7-3630QM @ 2.40GHz7,604$304.49Intel Core i5-4670K @ 3.40GHz7,598$249.99Intel Core i5-4690 @ 3.50GHz7,542$224.99Intel Core i7-3610QM @ 2.30GHz7,460$399.99Intel Core i5-4670 @ 3.40GHz7,342$226.99Intel Core i5-4590 @ 3.30GHz7,174$199.99Intel Core i7-4702MQ @ 2.20GHz7,146NAIntel Core i5-3570K @ 3.40GHz7,130$477.23 Solution import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; import java.util.Arrays; public class Main { /** * This the main function that runs at the start * param args - input arguments from the command line */ static public void main(String[] args)
- 2. { CPUList cpuList = new CPUList(); //The CPUList used to retrieve data from the fiile and store in the db CPUList cpuListRetrieved = new CPUList(); //The CPUList used to retrieve data from the database CpuDb cpuDb = new CpuDb(); //The database object used to move data to and from the CPU Lists try { //Read in the file and store each line into the CPU objects in a list Files.lines(Paths.get("Project04Data.csv")) .map(line -> line.split(" ")) // Stream .flatMap(Arrays::stream) // Stream .forEach(line -> cpuList.AddCpu(line)); //Clear the list table for the new listing cpuDb.Clear(); //Insert the Cpu List into the database cpuDb.SetCpuList(cpuList); //Retrieve the Cpu List into a different CPU List object from the database cpuDb.GetCpuList(cpuListRetrieved); //Show the report from the new list that was retrieved from the database cpuListRetrieved.ShowReport(); } catch (IOException e) { e.printStackTrace(); } } } CPUList.java import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; public class CPUList {
- 3. ArrayList theList = new ArrayList<>(); /** * Default constructor for the CPU */ public void CPUList() { } /** * param strInputLine Input line to be used in creating the CPU object */ public void AddCpu(String strInputLine) { theList.add(new CPU(strInputLine)); } /** * param tempCPU - A CPU object to add to the list */ public void AddCpu(CPU tempCPU) { theList.add(tempCPU); } /** * return the combined string showing the CPU list */ public String toString() { String strString = ""; for (CPU cpu : theList) { strString += cpu; } return(strString); } /** * Print the CPU List Statistics * average price of CPU's
- 4. * highest priced CPU * lowest priced CPU * best value CPU (performance / price )* */ public void PrintStatistics() { System.out.printf("average price CPU: %5.2f ", theList.stream().mapToDouble(CPU::getPrice).average().getAsDouble()); System.out.printf("highest price CPU: %5.2f ", theList.stream().mapToDouble(CPU::getPrice).max().getAsDouble()); System.out.printf("lowest price CPU: %5.2f ", theList.stream().mapToDouble(CPU::getPrice).min().getAsDouble()); System.out.println("Best Value CPU: " + Collections.max( theList, new CpuComparator() ).getCpuName()); } /** *Create the report from the database table with the following format * * Intel Core i7-6700HQ 2.60GHz: $1,509.00 * Intel Core i7-3770K 3.50GHz: $560.50 * Intel Core i5-3570K 3.40GHz: $477.23 * Intel Core i7-4700MQ 2.40GHz: $467.40 */ public void ShowReport() { for(CPU objCpu : theList) { System.out.printf("%s: %5.2f ", objCpu.getCpuName(), objCpu.getPrice()); } } /** * Remove the CPU objects that do not have all of the required values parsed out of the line */ public void CleanCpuList() {
- 5. Iterator it = theList.iterator(); while( it.hasNext() ) { CPU objCpu = it.next(); if(objCpu.getValid() == false) { it.remove(); } } } } CPU.java public class CPU { private boolean m_bValid; private String m_strCPULine; private String m_strCPUName; private double m_dPerformance; private double m_dPrice; private double m_dValue; //Performance / Price private static final double NA_VALUE = 9999.99; /** * param strCPULine is the CPU line from the file */ public CPU(String strCPULine) { m_strCPULine = strCPULine; m_bValid = ParseCPULine(strCPULine); } /** * Constructor to be used when the fields are already known * param strCPUName - name of the CPU * param iPerformance - performance factor of the CPU
- 6. * param dPrice - price of the CPU */ public CPU(String strCPUName, int iPerformance, double dPrice) { m_strCPUName = strCPUName; m_dPerformance = (double)iPerformance; m_dPrice = dPrice; m_dValue = m_dPerformance / m_dPrice; //Performance / Price m_bValid = true; } /** * param m_strCPULine - the input file line to be parsed * return Indicate if the ParseCPULin succeeded or not */ private boolean ParseCPULine(String m_strCPULine) { boolean bRetValue = true; String strTemp; String strNumeric; //Use a regular expression to parse the line into the individual members //TODO - Figure out why regex not working for 1,509.00 //messes up on the comma in the value String[] tokens = m_strCPULine.split(",(?=([^"]*"[^"]*")*[^"]*$)"); //http://rubular.com/ is helpful for regex //Do we have the correct number of tokens from the split. If not then mark as invalid if(tokens.length != 3) { bRetValue = false; } m_strCPUName = tokens[0]; //Get the performance try { strTemp = tokens[1]; strNumeric = strTemp.replaceAll("[^0-9.]+", ""); //Get rid of non digit characters m_dPerformance = Double.parseDouble(strNumeric);
- 7. } catch(NumberFormatException ex) { m_dPerformance = NA_VALUE; bRetValue = false; } //Get the price try { strTemp = tokens[2]; strNumeric = strTemp.replaceAll("[^0-9.]+", ""); //Get rid of non digit characters m_dPrice = Double.parseDouble(strNumeric); } catch(NumberFormatException ex) { m_dPrice = NA_VALUE; //Bogus Value bRetValue = false; } //If we have valid Performance and Price values then return the calculated value otherwise set to zero if(bRetValue) { m_dValue = m_dPerformance / m_dPrice; } else { m_dValue = 0.0; } // for(String strTemp1 : tokens) // { // System.out.printf("%st", strTemp1); // } // // System.out.printf(" "); return bRetValue; }
- 8. /** * return A string representing the CPU */ public String toString() { return String.format("[%b]t%stt[%5.2f]t[%5.2f] ", m_bValid, m_strCPUName, m_dPerformance, m_dPrice); //return String.format("%s ", m_strCPULine); //Just return the original line } /** * Getter * return the performance as an double */ public double getPerformance(){return(m_dPerformance);}; /** * Getter * return the price as a double */ public double getPrice(){return(m_dPrice);}; /** * Getter * return the value as a double */ public double getValue(){return(m_dValue);}; /** * Getter * return the CPU Name */ public String getCpuName(){return(m_strCPUName);}; /** * return if the cpu's line was parsed with all valid values for the fields or not */ public boolean getValid(){return(m_bValid);}; }
- 9. CPUDb.java import java.sql.*; public class CpuDb { //SQL objects Connection c = null; boolean bConnected = false; /** * Default constructor */ public CpuDb() { bConnected = Connect("cpudb", "tcc2016", "tcc2016"); } /** * param strTable - table for which the column names will be shown */ public void ShowColumns(String strTable) { Statement s = null; ResultSet r = null; try { s = c.createStatement(); r = s.executeQuery("SELECT * from " + strTable); ResultSetMetaData m = r.getMetaData(); int col = m.getColumnCount(); for (int i = 1; i <= col; i++) { System.out.printf("%stt", m.getColumnName(i)); } System.out.println(); } catch ( SQLException e) { e.printStackTrace();
- 10. } } /** * Connect to the database * param strDatabase - database name * param strUser - database user * param strPassword - user password * return true if the connection is made */ private boolean Connect(String strDatabase, String strUser, String strPassword) { boolean bConnectStatus = false; try { //Had to suppress a SSL warning message that kept popping up c = DriverManager.getConnection("jdbc:mysql://localhost/" + strDatabase + "?autoReconnect=true&useSSL=false", strUser, strPassword); System.out.println("Database connection made "); bConnectStatus = true; } catch ( SQLException e) { e.printStackTrace(); } return(bConnectStatus); } /** * Provide the insert into the database of the CPU list * param lstCpu - list of CPUs to insert * return true if the setting of the db via inserts succeeded */ public boolean SetCpuList(CPUList lstCpu) { boolean retValue = false; Statement s = null;
- 11. String strSql; ResultSet r = null; try { s = c.createStatement(); //"insert into cputable( cpuname, performance, price) values( 'CPU1', 123, 55.66)" for(CPU objCPU : lstCpu.theList) { //Only insert if valid if(objCPU.getValid() == true) { //Create the CPU strSql = "insert into cputable( cpuname, performance, price) values('" + objCPU.getCpuName() + "'," + objCPU.getPerformance() + "," + objCPU.getPrice() + ")"; //System.out.println(strSql); s.execute(strSql); } } } catch ( SQLException e) { e.printStackTrace(); } return (retValue); } /** * Get the CPU list from the the database and return the list * param lstCpu - list of CPUs in the database * return indicates if the loading of the cpu list from the database succeeded or not */ public boolean GetCpuList(CPUList lstCpu) { boolean retValue = false;
- 12. Statement s = null; ResultSet r = null; try { //Get the statement object connected to the database s = c.createStatement(); //Get all of the fields from the cpu table r = s.executeQuery("SELECT * from cputable order by price DESC"); //Get the results set for the query ResultSetMetaData m = r.getMetaData(); //Iterate through the record set and add to the CPU list while( r.next() ){ lstCpu.AddCpu(new CPU(r.getString( "cpuname" ),r.getInt( "performance" ),r.getFloat( "price" ))); } // //How many columns do we have // int col = m.getColumnCount(); // // //Show all of the data in the results set // while( r.next() ){ // for( int i = 1; i <= col; i++ ){ // int t = m.getColumnType( i ); // switch( t ){ // case Types.INTEGER: // System.out.print( r.getInt( i ) ); // break; // case Types.VARCHAR: // System.out.print( r.getString( i ) ); // break; // case Types.DATE: // System.out.print( r.getDate( i ) ); // break; // case Types.FLOAT: // System.out.print( r.getFloat( i ) ); // break;
- 13. // default: // System.out.print("Unk("+ r.getType() + ")"); // break; // } // System.out.print( ";" ); // } // System.out.println(); // } retValue = true; } catch ( SQLException e) { e.printStackTrace(); } return (retValue); } /** * Clear the data out of the database * return if the table was cleared or not */ public boolean Clear() { boolean retValue = false; Statement s = null; ResultSet r = null; try { //Get the statement object connected to the database s = c.createStatement(); //Get all of the fields from the cpu table s.execute("delete from cputable"); } catch ( SQLException e) { e.printStackTrace(); }
- 14. return (retValue); } } Project04Data.csv CPU Name,Performance,Price (USD) Intel Core i7-3770K @ 3.50GHz,"9,556",$560.50 Intel Core i7-3770 @ 3.40GHz,"9,327",$335.55 Intel Core i7-3820 @ 3.60GHz,"8,990",$404.38 AMD FX-8350 Eight-Core,"8,940",$149.99 Intel Core i7-2600K @ 3.40GHz,"8,501",$379.97 Intel Core i7-2600 @ 3.40GHz,"8,242",$214.99 Intel Core i7-4720HQ @ 2.60GHz,"8,046",NA AMD FX-8320 Eight-Core,"8,008",$145.99 Intel Core i7-6700HQ @ 2.60GHz,"7,997",$1,509.00 Intel Core i7-4710HQ @ 2.50GHz,"7,826",NA Intel Core i5-6600K @ 3.50GHz,"7,762",$239.99 Intel Core i7-4700HQ @ 2.40GHz,"7,754",$383.00 Intel Core i7-4700MQ @ 2.40GHz,"7,736",$467.40 Intel Core i5-4690K @ 3.50GHz,"7,690",$239.99 AMD FX-8150 Eight-Core,"7,619",$165.99 Intel Core i7-3630QM @ 2.40GHz,"7,604",$304.49 Intel Core i5-4670K @ 3.40GHz,"7,598",$249.99 Intel Core i5-4690 @ 3.50GHz,"7,542",$224.99 Intel Core i7-3610QM @ 2.30GHz,"7,460",$399.99 Intel Core i5-4670 @ 3.40GHz,"7,342",$226.99 Intel Core i5-4590 @ 3.30GHz,"7,174",$199.99 Intel Core i7-4702MQ @ 2.20GHz,"7,146",NA Intel Core i5-3570K @ 3.40GHz,"7,130",$477.23 CpuComparator.java import java.util.Comparator; public class CpuComparator implements Comparator< CPU > { /** * Compare function to return which cpu has better performance * @param c1 - first cpu object
- 15. * @param c2 - second cpu object * @return */ public int compare(CPU c1, CPU c2 ) { double c1Value = c1.getValue(); double c2Value = c2.getValue(); return (int)(c1Value - c2Value); } }