fix: PrepareStatement + enum Factions

src/main/java/ru/prisonlife/PrisonAPI/PrisonAPI.java

@@ -11,7 +11,27 @@ public class PrisonAPI extends JavaPlugin {
     public static final String PLUGIN_PATH = "plugins/PrisonManager";
 
     public enum Factions {
-        NONE, ASIANS, LATINOS, NIGGAZ, POLICE
+        NONE(0), ASIANS(1), LATINOS(2), NIGGAZ(3), POLICE(4);
+
+        public static Factions valueOf(int id) {
+            for (Factions factions : Factions.values()) {
+                if (factions.id == id) {
+                    return factions;
+                }
+            }
+
+            throw new IllegalArgumentException("Factions id " + id + " not defined!");
+        }
+
+        private int id;
+
+        Factions(int id) {
+            this.id = id;
+        }
+
+        public int getId() {
+            return id;
+        }
     }
 
     public static Connection CONN;

src/main/java/ru/prisonlife/PrisonAPI/template/Faction.java

@@ -1,21 +1,18 @@
 package ru.prisonlife.prisonapi.template;
 
 import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-import ru.prisonlife.prisonapi.PrisonAPI;
+import ru.prisonlife.prisonapi.PrisonAPI.Factions;
 
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import static ru.prisonlife.prisonapi.PrisonAPI.CONN;
+
 public class Faction {
 
-    private PreparedStatement state;
-    private ResultSet resultSet;
     private Prisoner me;
 
     Faction(Prisoner prisoner) {
@@ -23,44 +20,46 @@ public class Faction {
     }
 
     public String getType() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT FACTION FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT FACTION FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getString(1);
-            }
-        }
-        disconnect();
+                } else {
                     return "null";
                 }
+            }
+        }
+    }
 
     public int getId() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT FACTION FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
-                for (int i = 0; i < PrisonAPI.Factions.values().length; i++) {
-                    if (PrisonAPI.Factions.values()[i].name().equals(resultSet.getString(1))) {
-                        return i;
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT FACTION FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
+                    return Factions.valueOf(resultSet.getString(1)).getId();
                 }
             }
         }
-        }
-        disconnect();
+
         return 0;
     }
 
     public int getRangId() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT F_RANG FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT F_RANG FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
-            }
-        }
-        disconnect();
+                } else {
                     return 0;
                 }
+            }
+        }
+    }
 
     public String getRangType() throws SQLException {
         String[][] post = {
@@ -72,81 +71,78 @@ public class Faction {
     }
 
     public void addRang(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET F_RANG = " + (getRangId() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setRang(getRangId() + value);
     }
 
     public void setRang(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET F_RANG = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET F_RANG = ? WHERE UUID = ?")) {
+            statement.setInt(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public void setFaction(int id) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET FACTION = '" + PrisonAPI.Factions.values()[id].name() + "' WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET FACTION = ? WHERE UUID = ?")) {
+            statement.setInt(1, Factions.valueOf(id).getId());
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public int getRespect() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT RESPECT FROM prison4life.player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT RESPECT FROM prison4life.player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
-            }
-        }
-        disconnect();
+                } else {
                     return 0;
                 }
+            }
+        }
+    }
 
     public void addRespect(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET RESPECT = " + (getRespect() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setRespect(getRespect() + value);
     }
 
     public void setRespect(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET RESPECT = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET RESPECT = ? WHERE UUID = ?")) {
+            statement.setInt(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public int getRespectDailyCooldown() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT COOLDOWN FROM daily_respect_task WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT COOLDOWN FROM daily_respect_task WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
-        }
-        disconnect();
+                } else {
                     return 0;
                 }
+            }
+        }
+    }
 
     public void addRespectDailyCooldown(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE daily_respect_task SET COOLDOWN = " + (getRespectDailyCooldown() + value)
-                    + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
+        setRespectDailyCooldown(getRespectDailyCooldown() + value);
     }
 
     public void setRespectDailyCooldown(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE daily_respect_task SET COOLDOWN = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+         try (PreparedStatement statement = CONN.prepareStatement("UPDATE daily_respect_task SET COOLDOWN = ? WHERE UUID = ?")) {
+            statement.setInt(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
     }
 
@@ -163,15 +159,4 @@ public class Faction {
                 })
                 .collect(Collectors.toList());
     }
-
-    private void connect() throws SQLException {
-        state = PrisonAPI.CONN.prepareStatement("SELECT * UUID FROM player_stats WHERE UUID = ?;");
-        state.setString(1, me.getPlayer().getUniqueId().toString());
-        resultSet = state.executeQuery("SELECT UUID FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-    }
-
-    private void disconnect() throws SQLException {
-        resultSet.close();
-        state.close();
-    }
 }

src/main/java/ru/prisonlife/PrisonAPI/template/Level.java

@@ -1,15 +1,13 @@
 package ru.prisonlife.prisonapi.template;
 
-import ru.prisonlife.prisonapi.PrisonAPI;
-
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
+import static ru.prisonlife.prisonapi.PrisonAPI.CONN;
+
 public class Level {
 
-    private PreparedStatement state;
-    private ResultSet resultSet;
     private Prisoner me;
     private Score score;
 
@@ -19,50 +17,41 @@ public class Level {
     }
 
     public Score getScore() throws SQLException {
+        //FIXME приведи в порядок метод
+        /*
         connect();
         if (resultSet.first()) {
             return this.score;
         }
         disconnect();
+        */
         return null;
     }
 
     public double getLevel() throws SQLException, NullPointerException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT LEVEL FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT LEVEL FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getDouble(1);
+                } else {
+                    return 1d; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addLevel(double value) throws SQLException, NullPointerException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET LEVEL = " + (getLevel() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setLevel(getLevel() + value);
     }
 
     public void setLevel(double value) throws SQLException, NullPointerException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET LEVEL = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
-    }
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET LEVEL = ? WHERE UUID = ?")) {
+            statement.setDouble(1, getLevel() + value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
 
-    private void connect() throws SQLException {
-        state = PrisonAPI.CONN.prepareStatement("SELECT * UUID FROM player_stats WHERE UUID = ?;");
-        state.setString(1, me.getPlayer().getUniqueId().toString());
-        resultSet = state.executeQuery("SELECT UUID FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+            statement.executeUpdate();
         }
-
-    private void disconnect() throws SQLException {
-        resultSet.close();
-        state.close();
     }
 }

src/main/java/ru/prisonlife/PrisonAPI/template/Prisoner.java

@@ -4,7 +4,6 @@ import org.bukkit.Location;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
-import ru.prisonlife.prisonapi.PrisonAPI;
 
 import java.io.File;
 import java.sql.PreparedStatement;
@@ -14,6 +13,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 
+import static ru.prisonlife.prisonapi.PrisonAPI.CONN;
 import static ru.prisonlife.prisonapi.PrisonAPI.PLUGIN_PATH;
 
 public class Prisoner {
@@ -23,8 +23,6 @@ public class Prisoner {
     private Faction faction;
     private Wallet wallet;
     private Stats stats;
-    private PreparedStatement state;
-    private ResultSet resultSet;
 
     public Prisoner(Player player) {
         me = player;
@@ -122,20 +120,35 @@ public class Prisoner {
     }
 
     public void register() throws SQLException {
-        state = PrisonAPI.CONN.prepareStatement("SELECT * UUID FROM player_stats WHERE UUID = ?;");
-        state.setString(1, me.getUniqueId().toString());
-        resultSet = state.executeQuery("SELECT UUID FROM player_stats WHERE UUID = '" + me.getUniqueId() + "'");
+        PreparedStatement statement = CONN.prepareStatement("SELECT UUID FROM player_stats WHERE UUID = ?");
+        statement.setString(1, me.getUniqueId().toString());
+
+        try (ResultSet resultSet = statement.executeQuery()) {
             if (!resultSet.next()) {
-            state.execute(
-                    "INSERT INTO player_stats(NAME, UUID, LEVEL, POINTS, FACTION, RESPECT, F_RANG, WALLET, G_TIME, D_BLOCKS, " +
-                            "K_PLAYERS, K_MOBS, DEATHS) VALUES (" + "'" + getPlayer().getName()
-                            + "', '" + me.getUniqueId() + "', 1, 0, 'NONE', 0, 0, 0, 0, 0, 0, 0, 0);");
-            state.execute("INSERT INTO daily_respect_task(NAME, UUID, COOLDOWN) VALUES ('" + me.getName() + "', '" + me.getUniqueId() + "', (3600 * 24));");
+                statement.close();
+
+                statement = CONN.prepareStatement(
+                        "INSERT INTO player_stats(NAME, UUID, LEVEL, POINTS, FACTION, RESPECT, F_RANG, WALLET, " +
+                                "G_TIME, D_BLOCKS, K_PLAYERS, K_MOBS, DEATHS) "
+                                + "VALUES (?, ?, 1, 0, 'NONE', 0, 0, 0, 0, 0, 0, 0, 0)");
+                statement.setString(1, getPlayer().getName());
+                statement.setString(2, me.getUniqueId().toString());
+                statement.executeUpdate();
+                statement.close();
+
+                statement = CONN.prepareStatement(
+                        "INSERT INTO daily_respect_task(NAME, UUID, COOLDOWN) " +
+                                "VALUES (?, ?, ?)");
+                statement.setString(1, getPlayer().getName());
+                statement.setString(2, me.getUniqueId().toString());
+                statement.setInt(3, (3600 * 24));
+                statement.executeUpdate();
+
                 level = new Level(this);
                 stats = new Stats(this);
                 wallet = new Wallet(this);
             }
-        resultSet.close();
-        state.close();
+        }
+        statement.close();
     }
 }

src/main/java/ru/prisonlife/PrisonAPI/template/Score.java

@@ -1,15 +1,13 @@
 package ru.prisonlife.prisonapi.template;
 
-import ru.prisonlife.prisonapi.PrisonAPI;
-
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
+import static ru.prisonlife.prisonapi.PrisonAPI.CONN;
+
 public class Score {
 
-    private PreparedStatement state;
-    private ResultSet resultSet;
     private Prisoner me;
 
     Score(Prisoner prisoner) {
@@ -17,41 +15,29 @@ public class Score {
     }
 
     public double getPoints() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT POINTS FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT POINTS FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getDouble(1);
+                } else {
+                    return 0d; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void setPoints(double value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET POINTS = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET POINTS = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public void addPoints(double value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET POINTS = " + (getPoints() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
-    }
-
-    private void connect() throws SQLException {
-        state = PrisonAPI.CONN.prepareStatement("SELECT * UUID FROM player_stats WHERE UUID = ?;");
-        state.setString(1, me.getPlayer().getUniqueId().toString());
-        resultSet = state.executeQuery("SELECT UUID FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-    }
-
-    private void disconnect() throws SQLException {
-        resultSet.close();
-        state.close();
+        setPoints(getPoints() + value);
     }
 }

src/main/java/ru/prisonlife/PrisonAPI/template/Stats.java

@@ -1,15 +1,13 @@
 package ru.prisonlife.prisonapi.template;
 
-import ru.prisonlife.prisonapi.PrisonAPI;
-
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
+import static ru.prisonlife.prisonapi.PrisonAPI.CONN;
+
 public class Stats {
 
-    private PreparedStatement state;
-    private ResultSet resultSet;
     private Prisoner me;
 
     Stats(Prisoner prisoner) {
@@ -17,149 +15,137 @@ public class Stats {
     }
 
     public void setServerTime(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET G_TIME = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET G_TIME = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public int getServerTime() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT G_TIME FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT G_TIME FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
+                } else {
+                    return 0; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addServerTime(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET G_TIME = " + (getServerTime() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setServerTime(getServerTime() + value);
     }
 
     public void setBlocks(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET B = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET B = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public int getBlocks() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT D_BLOCKS FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT D_BLOCKS FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
+                } else {
+                    return 0; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addBlocks(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET D_BLOCKS = " + (getBlocks() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setBlocks(getBlocks() + value);
     }
 
     public void setPlayers(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET K_PLAYERS = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET K_PLAYERS = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public int getPlayers() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT K_PLAYERS FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT K_PLAYERS FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
+                } else {
+                    return 0; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addPlayers(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET K_PLAYERS = " + (getPlayers() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setPlayers(getPlayers() + value);
     }
 
     public void setMobs(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET K_MOBS = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET K_MOBS = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
         }
-        disconnect();
     }
 
     public int getMobs() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT K_MOBS FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT K_MOBS FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
+                } else {
+                    return 0; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addMobs(int value) throws SQLException {
-        connect();
-        if (resultSet.first())
-            state.execute("UPDATE player_stats SET K_MOBS = " + (getMobs() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        disconnect();
+        setMobs(getMobs() + value);
     }
 
     public void setDeaths(int value) throws SQLException {
-        connect();
-        if (resultSet.first())
-            state.execute("UPDATE player_stats SET DEATHS = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        disconnect();
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET DEATHS = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
+
+            statement.executeUpdate();
+        }
     }
 
     public int getDeaths() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT DEATHS FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first())
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT DEATHS FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
+                } else {
+                    return 0; //TODO нужно или default значение, или exception
+                }
+            }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addDeaths(int value) throws SQLException {
-        connect();
-        if (resultSet.first())
-            state.execute("UPDATE player_stats SET DEATHS = " + (getDeaths() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        disconnect();
-    }
-
-    private void connect() throws SQLException {
-        state = PrisonAPI.CONN.prepareStatement("SELECT * UUID FROM player_stats WHERE UUID = ?;");
-        state.setString(1, me.getPlayer().getUniqueId().toString());
-        resultSet = state.executeQuery("SELECT UUID FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-    }
-
-    private void disconnect() throws SQLException {
-        resultSet.close();
-        state.close();
+        setDeaths(getDeaths() + value);
     }
 }

src/main/java/ru/prisonlife/PrisonAPI/template/Wallet.java

@@ -1,15 +1,13 @@
 package ru.prisonlife.prisonapi.template;
 
-import ru.prisonlife.prisonapi.PrisonAPI;
-
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
+import static ru.prisonlife.prisonapi.PrisonAPI.CONN;
+
 public class Wallet {
 
-    private PreparedStatement state;
-    private ResultSet resultSet;
     private Prisoner me;
 
     Wallet(Prisoner prisoner) {
@@ -17,49 +15,33 @@ public class Wallet {
     }
 
     public int getBalance() throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            resultSet = state.executeQuery("SELECT WALLET FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-            if (resultSet.first()) {
+        try (PreparedStatement statement = CONN.prepareStatement("SELECT WALLET FROM player_stats WHERE UUID = ?")) {
+            statement.setString(1, me.getPlayer().getUniqueId().toString());
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
                     return resultSet.getInt(1);
+                } else {
+                    return 0; //TODO нужно или default значение, или exception
+                }
             }
         }
-        disconnect();
-        return NullPointerException.class.hashCode();
     }
 
     public void addBalance(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET WALLET = " + (getBalance() + value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setBalance(getBalance() + value);
     }
 
     public void deposit(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET WALLET = " + (getBalance() - value) + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
+        setBalance(getBalance() - value);
     }
 
     public void setBalance(int value) throws SQLException {
-        connect();
-        if (resultSet.first()) {
-            state.execute("UPDATE player_stats SET WALLET = " + value + " WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
-        }
-        disconnect();
-    }
+        try (PreparedStatement statement = CONN.prepareStatement("UPDATE player_stats SET WALLET = ? WHERE UUID = ?")) {
+            statement.setDouble(1, value);
+            statement.setString(2, me.getPlayer().getUniqueId().toString());
 
-    private void connect() throws SQLException {
-        state = PrisonAPI.CONN.prepareStatement("SELECT * UUID FROM player_stats WHERE UUID = ?;");
-        state.setString(1, me.getPlayer().getUniqueId().toString());
-        resultSet = state.executeQuery("SELECT UUID FROM player_stats WHERE UUID = '" + me.getPlayer().getUniqueId() + "'");
+            statement.executeUpdate();
         }
-
-    private void disconnect() throws SQLException {
-        resultSet.close();
-        state.close();
     }
 }