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Домашнее задание №2 #15

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5 changes: 4 additions & 1 deletion .gitignore
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@@ -1,2 +1,5 @@
# Project exclude paths
/out/
/out/
/.idea/
/tmpDB.db
/target/
19 changes: 15 additions & 4 deletions .idea/dataSources.xml
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13 changes: 0 additions & 13 deletions .idea/libraries/Maven__org_junit_jupiter_junit_jupiter_5_6_0_RC1.xml
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13 changes: 0 additions & 13 deletions .idea/libraries/Maven__org_junit_platform_junit_platform_commons_1_6_0_RC1.xml
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13 changes: 0 additions & 13 deletions .idea/libraries/Maven__org_junit_platform_junit_platform_engine_1_6_0_RC1.xml
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66 changes: 52 additions & 14 deletions task2/src/main/java/DBUtility.java
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Expand Up @@ -18,41 +18,70 @@ public class DBUtility {
*/


void AddPrinters(Statement stmt){
// TODO: 16.12.2019
void AddPrinters(Statement stmt) throws SQLException {
ArrayList<Printer> printers = new ArrayList<>();
Printer printer1 = new Printer(1012,"HP", "col", "laser", 20000);
Printer printer2 = new Printer(1010,"Canon", "bw", "jet", 5000);
Printer printer3 = new Printer(1010,"Canon", "bw", "jet", 5000);
printers.add(printer1);
printers.add(printer2);
printers.add(printer3);

for (Printer printer : printers) {
stmt.addBatch("INSERT INTO Printer (model, maker, color, type, price) VALUES (" + printer.getModel()
+ ", '" + printer.getMaker() + "', '" + printer.getColor() + "', '" + printer.getType()
+ "', " + printer.getPrice() + ");");
}
stmt.executeBatch();
}


public void createPrinterTable(Connection con, Statement stmt){
// TODO: 16.12.2019
public void createPrinterTable(Connection con, Statement stmt) throws SQLException {
stmt.execute("CREATE TABLE IF NOT EXISTS " +
"Printer (id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE " +
", model INTEGER, maker TEXT, color TEXT, type TEXT, price INTEGER)");
AddPrinters(stmt);
}

/*
* Метод должен вернуть список уникальных моделей PC дороже 15 тысяч
*/

public ArrayList<String> selectExpensivePC(Statement stmt){
//todo
return null;
public ArrayList<String> selectExpensivePC(Statement stmt) throws SQLException {
ArrayList<String> models = new ArrayList<>();
ResultSet rs = stmt.executeQuery("select distinct p.model from pc p where p.price > 15000");
while (rs.next()) {
models.add(rs.getString("model"));
}
return models;
}

/*
* Метод должен вернуть список id ноутов, скорость процессора
* которых выше чем 2500
*/

public ArrayList<Integer> selectQuickLaptop(Statement stmt) {
// TODO: 16.12.2019
return null;
public ArrayList<Integer> selectQuickLaptop(Statement stmt) throws SQLException {
ArrayList<Integer> ids = new ArrayList<>();
ResultSet rs = stmt.executeQuery("SELECT l.id from Laptop l where l.speed > 2500");
while (rs.next()) {
ids.add(rs.getInt("id"));
}
return ids;
}

/*
* Метод должен вернуть список производителей которые
* делают и пк и ноутбуки
*/
public ArrayList<String> selectMaker(Statement stmt){
public ArrayList<String> selectMaker(Statement stmt) throws SQLException {
ArrayList<String> ans = new ArrayList<>();
// TODO: 18.02.2020
ResultSet rs = stmt.executeQuery("SELECT DISTINCT pr.maker from Product pr, (" +
"SELECT p.maker from Product p where p.type = 'PC' and p.type <> 'Laptop') p " +
"where pr.type = 'Laptop' and pr.maker = p.maker");
while (rs.next()) {
ans.add(rs.getString("maker"));
}
return ans;
}

Expand All @@ -65,9 +94,18 @@ public ArrayList<String> selectMaker(Statement stmt){
* или сделать любым другим способом
*/

public int makerWithMaxProceeds(Statement stmt){
public int makerWithMaxProceeds(Statement stmt) throws SQLException {
int result = 0;
//todo
ResultSet rs = stmt.executeQuery("select max(m.sum) summ from (select sum(m.price) sum, p.maker from " +
"(SELECT pc.price, pc.model from PC pc\n" +
"UNION ALL\n" +
"SELECT l.price, l.model from Laptop l) m,\n" +
"(SELECT p.* FROM Product p GROUP by p.model) p\n" +
"where m.model = p.model\n" +
"group by p.maker) m");
while (rs.next()) {
result = rs.getInt("summ");
}
return result;

}
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10 changes: 5 additions & 5 deletions task2/src/test/java/DBTests.java
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Expand Up @@ -19,7 +19,7 @@ public void starter() {
try {
util = new DBUtility();
Class.forName("org.sqlite.JDBC");
con = DriverManager.getConnection("jdbc:sqlite:C:\\Users\\Mikhail\\IdeaProjects\\Java31\\homework.db");
con = DriverManager.getConnection("jdbc:sqlite:C:\\Geekbrains\\Java3\\homework.db");
stmt = con.createStatement();
} catch (ClassNotFoundException | SQLException e) {
e.printStackTrace();
Expand Down Expand Up @@ -47,28 +47,28 @@ public void testTable() throws SQLException {
}

@Test
public void testExpensivePC(){
public void testExpensivePC() throws SQLException {
ArrayList<String> list = util.selectExpensivePC(stmt);
list.sort(Comparator.comparing(o->o));
Assert.assertArrayEquals(new String[]{"2205", "2210"}, list.toArray());
}

@Test
public void testQuickLaptop(){
public void testQuickLaptop() throws SQLException {
ArrayList<Integer> list = util.selectQuickLaptop(stmt);
Collections.sort(list);
Assert.assertArrayEquals(new Integer[]{3, 7}, list.toArray());
}

@Test
public void testMaker(){
public void testMaker() throws SQLException {
ArrayList<String> list = util.selectMaker(stmt);
Collections.sort(list);
Assert.assertArrayEquals(new String[]{"Intel"}, list.toArray());
}

@Test
public void maxCostTest(){
public void maxCostTest() throws SQLException {
int max = util.makerWithMaxProceeds(stmt);
Assert.assertEquals(140000, max);
}
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10 changes: 5 additions & 5 deletions task3/task3.iml
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Expand Up @@ -13,12 +13,12 @@
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter:5.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter:5.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.opentest4j:opentest4j:1.2.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-params:5.4.2" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.apiguardian:apiguardian-api:1.0.0" level="project" />
</component>
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10 changes: 5 additions & 5 deletions task4/task4.iml
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Expand Up @@ -11,12 +11,12 @@
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter:5.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter:5.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.opentest4j:opentest4j:1.2.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.6.0-RC1" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.6.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-params:5.4.2" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.apiguardian:apiguardian-api:1.0.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
Expand Down