decrease memory used

src/main/java/com/alibaba/druid/filter/FilterManager.java

@@ -33,7 +33,7 @@ public class FilterManager {
 
     private final static Log                               LOG      = LogFactory.getLog(FilterManager.class);
 
-    private static final ConcurrentHashMap<String, String> aliasMap = new ConcurrentHashMap<String, String>();
+    private static final ConcurrentHashMap<String, String> aliasMap = new ConcurrentHashMap<String, String>(16, 0.75f, 1);
 
     static {
         try {

src/main/java/com/alibaba/druid/proxy/DruidDriver.java

@@ -53,7 +53,7 @@ public class DruidDriver implements Driver, DruidDriverMBean {
 
     private final static DruidDriver                                instance                 = new DruidDriver();
 
-    private final static ConcurrentMap<String, DataSourceProxyImpl> proxyDataSources         = new ConcurrentHashMap<String, DataSourceProxyImpl>();
+    private final static ConcurrentMap<String, DataSourceProxyImpl> proxyDataSources         = new ConcurrentHashMap<String, DataSourceProxyImpl>(16, 0.75f, 1);
     private final static AtomicInteger                              dataSourceIdSeed         = new AtomicInteger(0);
     private final static AtomicInteger                              sqlStatIdSeed            = new AtomicInteger(0);
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameter.java

@@ -20,7 +20,7 @@ import java.util.Calendar;
 /**
  * @author wenshao<szujobs@hotmail.com>
  */
-public class JdbcParameter {
+public interface JdbcParameter {
 
     public static final int BinaryInputStream     = 10001;
     public static final int AsciiInputStream      = 10002;
@@ -28,56 +28,6 @@ public class JdbcParameter {
     public static final int NCharacterInputStream = 10004;
     public static final int URL                   = 10005;
 
-    private final int       sqlType;
-    private final Object    value;
-    private final long      length;
-    private final Calendar  calendar;
-    private final int       scaleOrLength;
-
-    public JdbcParameter(int sqlType, Object value, long length, Calendar calendar, int scaleOrLength){
-        this.sqlType = sqlType;
-        this.value = value;
-        this.length = length;
-        this.calendar = calendar;
-        this.scaleOrLength = scaleOrLength;
-    }
-
-    public JdbcParameter(int sqlType, Object value, long length, Calendar calendar){
-        this(sqlType, value, -1, null, -1);
-    }
-
-    public JdbcParameter(int sqlType, Object value){
-        this(sqlType, value, -1, null);
-    }
-
-    public JdbcParameter(int sqlType, Object value, long length){
-        this(sqlType, value, length, null);
-    }
-
-    public JdbcParameter(int sqlType, Object value, Calendar calendar){
-        this(sqlType, value, -1, calendar);
-    }
-
-    public int getScaleOrLength() {
-        return scaleOrLength;
-    }
-
-    public Object getValue() {
-        return value;
-    }
-
-    public long getLength() {
-        return length;
-    }
-
-    public Calendar getCalendar() {
-        return calendar;
-    }
-
-    public int getSqlType() {
-        return sqlType;
-    }
-
     public static interface TYPE {
 
         public static final int BinaryInputStream     = 10001;
@@ -89,4 +39,12 @@ public class JdbcParameter {
         public static final int BYTES                 = 10007;
 
     }
+
+    Object getValue();
+
+    long getLength();
+
+    Calendar getCalendar();
+
+    int getSqlType();
 }

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterDate.java

@@ -0,0 +1,35 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.sql.Types;
+import java.util.Calendar;
+import java.util.Date;
+
+public class JdbcParameterDate implements JdbcParameter {
+
+    private final Date value;
+
+    public JdbcParameterDate(Date value){
+        this.value = value;
+    }
+
+    @Override
+    public Object getValue() {
+        return value;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return Types.DATE;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterDecimal.java

@@ -0,0 +1,35 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.math.BigDecimal;
+import java.sql.Types;
+import java.util.Calendar;
+
+public class JdbcParameterDecimal implements JdbcParameter {
+
+    private final BigDecimal value;
+
+    public JdbcParameterDecimal(BigDecimal value){
+        this.value = value;
+    }
+
+    @Override
+    public Object getValue() {
+        return value;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return Types.DECIMAL;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterImpl.java

@@ -0,0 +1,56 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.util.Calendar;
+
+public class JdbcParameterImpl implements JdbcParameter {
+
+    private final int      sqlType;
+    private final Object   value;
+    private final long     length;
+    private final Calendar calendar;
+    private final int      scaleOrLength;
+
+    public JdbcParameterImpl(int sqlType, Object value, long length, Calendar calendar, int scaleOrLength){
+        this.sqlType = sqlType;
+        this.value = value;
+        this.length = length;
+        this.calendar = calendar;
+        this.scaleOrLength = scaleOrLength;
+    }
+
+    public JdbcParameterImpl(int sqlType, Object value, long length, Calendar calendar){
+        this(sqlType, value, -1, null, -1);
+    }
+
+    public JdbcParameterImpl(int sqlType, Object value){
+        this(sqlType, value, -1, null);
+    }
+
+    public JdbcParameterImpl(int sqlType, Object value, long length){
+        this(sqlType, value, length, null);
+    }
+
+    public JdbcParameterImpl(int sqlType, Object value, Calendar calendar){
+        this(sqlType, value, -1, calendar);
+    }
+
+    public int getScaleOrLength() {
+        return scaleOrLength;
+    }
+
+    public Object getValue() {
+        return value;
+    }
+
+    public long getLength() {
+        return length;
+    }
+
+    public Calendar getCalendar() {
+        return calendar;
+    }
+
+    public int getSqlType() {
+        return sqlType;
+    }
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterInt.java

@@ -0,0 +1,34 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.sql.Types;
+import java.util.Calendar;
+
+public class JdbcParameterInt implements JdbcParameter {
+
+    private final int value;
+
+    public JdbcParameterInt(int value){
+        this.value = value;
+    }
+
+    @Override
+    public Object getValue() {
+        return value;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return Types.INTEGER;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterLong.java

@@ -0,0 +1,34 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.sql.Types;
+import java.util.Calendar;
+
+public class JdbcParameterLong implements JdbcParameter {
+
+    private final long value;
+
+    public JdbcParameterLong(long value){
+        this.value = value;
+    }
+
+    @Override
+    public Object getValue() {
+        return value;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return Types.BIGINT;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterNull.java

@@ -0,0 +1,33 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.util.Calendar;
+
+public class JdbcParameterNull implements JdbcParameter {
+
+    private final int sqlType;
+
+    public JdbcParameterNull(int sqlType){
+        this.sqlType = sqlType;
+    }
+
+    @Override
+    public Object getValue() {
+        return null;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return sqlType;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterString.java

@@ -0,0 +1,34 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.sql.Types;
+import java.util.Calendar;
+
+public class JdbcParameterString implements JdbcParameter {
+
+    private final String value;
+
+    public JdbcParameterString(String value){
+        this.value = value;
+    }
+
+    @Override
+    public Object getValue() {
+        return value;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return Types.VARCHAR;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterTimestamp.java

@@ -0,0 +1,35 @@
+package com.alibaba.druid.proxy.jdbc;
+
+import java.sql.Types;
+import java.util.Calendar;
+import java.util.Date;
+
+public class JdbcParameterTimestamp implements JdbcParameter {
+
+    private final Date value;
+
+    public JdbcParameterTimestamp(Date value){
+        this.value = value;
+    }
+
+    @Override
+    public Object getValue() {
+        return value;
+    }
+
+    @Override
+    public long getLength() {
+        return 0;
+    }
+
+    @Override
+    public Calendar getCalendar() {
+        return null;
+    }
+
+    @Override
+    public int getSqlType() {
+        return Types.TIMESTAMP;
+    }
+
+}

src/main/java/com/alibaba/druid/proxy/jdbc/PreparedStatementProxyImpl.java

@@ -159,235 +159,235 @@ public class PreparedStatementProxyImpl extends StatementProxyImpl implements Pr
 
     @Override
     public void setArray(int parameterIndex, Array x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.ARRAY, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.ARRAY, x));
 
         createChain().preparedStatement_setArray(this, parameterIndex, x);
     }
 
     @Override
     public void setAsciiStream(int parameterIndex, InputStream x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.AsciiInputStream, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.AsciiInputStream, x));
 
         createChain().preparedStatement_setAsciiStream(this, parameterIndex, x);
     }
 
     @Override
     public void setAsciiStream(int parameterIndex, InputStream x, int length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.AsciiInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.AsciiInputStream, x, length));
 
         createChain().preparedStatement_setAsciiStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setAsciiStream(int parameterIndex, InputStream x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.AsciiInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.AsciiInputStream, x, length));
 
         createChain().preparedStatement_setAsciiStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setBigDecimal(int parameterIndex, BigDecimal x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.DECIMAL, x));
+        setParameter(parameterIndex, new JdbcParameterDecimal(x));
         createChain().preparedStatement_setBigDecimal(this, parameterIndex, x);
     }
 
     @Override
     public void setBinaryStream(int parameterIndex, InputStream x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.BinaryInputStream, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.BinaryInputStream, x));
 
         createChain().preparedStatement_setBinaryStream(this, parameterIndex, x);
     }
 
     @Override
     public void setBinaryStream(int parameterIndex, InputStream x, int length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.BinaryInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.BinaryInputStream, x, length));
 
         createChain().preparedStatement_setBinaryStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setBinaryStream(int parameterIndex, InputStream x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.BinaryInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.BinaryInputStream, x, length));
 
         createChain().preparedStatement_setBinaryStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setBlob(int parameterIndex, Blob x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.BLOB, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.BLOB, x));
 
         createChain().preparedStatement_setBlob(this, parameterIndex, x);
     }
 
     @Override
     public void setBlob(int parameterIndex, InputStream x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.BLOB, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.BLOB, x));
 
         createChain().preparedStatement_setBlob(this, parameterIndex, x);
     }
 
     @Override
     public void setBlob(int parameterIndex, InputStream x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.BLOB, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.BLOB, x, length));
         createChain().preparedStatement_setBlob(this, parameterIndex, x, length);
     }
 
     @Override
     public void setBoolean(int parameterIndex, boolean x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.BOOLEAN, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.BOOLEAN, x));
         createChain().preparedStatement_setBoolean(this, parameterIndex, x);
     }
 
     @Override
     public void setByte(int parameterIndex, byte x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.TINYINT, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.TINYINT, x));
 
         createChain().preparedStatement_setByte(this, parameterIndex, x);
     }
 
     @Override
     public void setBytes(int parameterIndex, byte[] x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.BYTES, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.BYTES, x));
 
         createChain().preparedStatement_setBytes(this, parameterIndex, x);
     }
 
     @Override
     public void setCharacterStream(int parameterIndex, Reader x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.CharacterInputStream, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.CharacterInputStream, x));
 
         createChain().preparedStatement_setCharacterStream(this, parameterIndex, x);
     }
 
     @Override
     public void setCharacterStream(int parameterIndex, Reader x, int length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.CharacterInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.CharacterInputStream, x, length));
 
         createChain().preparedStatement_setCharacterStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setCharacterStream(int parameterIndex, Reader x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.CharacterInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.CharacterInputStream, x, length));
 
         createChain().preparedStatement_setCharacterStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setClob(int parameterIndex, Clob x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.CLOB, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.CLOB, x));
 
         createChain().preparedStatement_setClob(this, parameterIndex, x);
     }
 
     @Override
     public void setClob(int parameterIndex, Reader x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.CLOB, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.CLOB, x));
 
         createChain().preparedStatement_setClob(this, parameterIndex, x);
     }
 
     @Override
     public void setClob(int parameterIndex, Reader x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.CLOB, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.CLOB, x, length));
 
         createChain().preparedStatement_setClob(this, parameterIndex, x, length);
     }
 
     @Override
     public void setDate(int parameterIndex, Date x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.DATE, x));
+        setParameter(parameterIndex, new JdbcParameterDate(x));
 
         createChain().preparedStatement_setDate(this, parameterIndex, x);
     }
 
     @Override
     public void setDate(int parameterIndex, Date x, Calendar cal) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.DATE, x, cal));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.DATE, x, cal));
 
         createChain().preparedStatement_setDate(this, parameterIndex, x, cal);
     }
 
     @Override
     public void setDouble(int parameterIndex, double x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.DOUBLE, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.DOUBLE, x));
 
         createChain().preparedStatement_setDouble(this, parameterIndex, x);
     }
 
     @Override
     public void setFloat(int parameterIndex, float x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.FLOAT, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.FLOAT, x));
 
         createChain().preparedStatement_setFloat(this, parameterIndex, x);
     }
 
     @Override
     public void setInt(int parameterIndex, int x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.INTEGER, x));
+        setParameter(parameterIndex, new JdbcParameterInt(x));
 
         createChain().preparedStatement_setInt(this, parameterIndex, x);
     }
 
     @Override
     public void setLong(int parameterIndex, long x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.BIGINT, x));
+        setParameter(parameterIndex, new JdbcParameterLong(x));
 
         createChain().preparedStatement_setLong(this, parameterIndex, x);
     }
 
     @Override
     public void setNCharacterStream(int parameterIndex, Reader x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.NCharacterInputStream, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.NCharacterInputStream, x));
 
         createChain().preparedStatement_setNCharacterStream(this, parameterIndex, x);
     }
 
     @Override
     public void setNCharacterStream(int parameterIndex, Reader x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.NCharacterInputStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.NCharacterInputStream, x, length));
 
         createChain().preparedStatement_setNCharacterStream(this, parameterIndex, x, length);
     }
 
     @Override
     public void setNClob(int parameterIndex, NClob x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.NCLOB, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.NCLOB, x));
 
         createChain().preparedStatement_setNClob(this, parameterIndex, x);
     }
 
     @Override
     public void setNClob(int parameterIndex, Reader x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.NCLOB, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.NCLOB, x));
 
         createChain().preparedStatement_setNClob(this, parameterIndex, x);
     }
 
     @Override
     public void setNClob(int parameterIndex, Reader x, long length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.NCLOB, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.NCLOB, x, length));
 
         createChain().preparedStatement_setNClob(this, parameterIndex, x, length);
     }
 
     @Override
     public void setNString(int parameterIndex, String x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.NVARCHAR, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.NVARCHAR, x));
 
         createChain().preparedStatement_setNString(this, parameterIndex, x);
     }
 
     @Override
     public void setNull(int parameterIndex, int sqlType) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(sqlType, null));
+        setParameter(parameterIndex, new JdbcParameterNull(sqlType));
 
         createChain().preparedStatement_setNull(this, parameterIndex, sqlType);
     }
 
     @Override
     public void setNull(int parameterIndex, int sqlType, String typeName) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(sqlType, null));
+        setParameter(parameterIndex, new JdbcParameterNull(sqlType));
 
         createChain().preparedStatement_setNull(this, parameterIndex, sqlType, typeName);
     }
@@ -401,191 +401,191 @@ public class PreparedStatementProxyImpl extends StatementProxyImpl implements Pr
 
     private void setObjectParameter(int parameterIndex, Object x) {
         if (x == null) {
-            setParameter(parameterIndex, new JdbcParameter(Types.OTHER, null));
+            setParameter(parameterIndex, new JdbcParameterNull(Types.OTHER));
             return;
         }
 
         Class<?> clazz = x.getClass();
         if (clazz == Byte.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.TINYINT, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.TINYINT, x));
             return;
         }
 
         if (clazz == Short.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.SMALLINT, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.SMALLINT, x));
             return;
         }
 
         if (clazz == Integer.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.INTEGER, x));
+            setParameter(parameterIndex, new JdbcParameterInt((Integer)x));
             return;
         }
 
         if (clazz == Long.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.BIGINT, x));
+            setParameter(parameterIndex, new JdbcParameterLong((Long) x));
             return;
         }
 
         if (clazz == String.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.VARCHAR, x));
+            setParameter(parameterIndex, new JdbcParameterString((String) x));
             return;
         }
 
         if (clazz == BigDecimal.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.DECIMAL, x));
+            setParameter(parameterIndex, new JdbcParameterDecimal((BigDecimal) x));
             return;
         }
 
         if (clazz == Float.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.FLOAT, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.FLOAT, x));
             return;
         }
 
         if (clazz == Double.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.DOUBLE, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.DOUBLE, x));
             return;
         }
 
         if (clazz == java.sql.Date.class || clazz == java.util.Date.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.DATE, x));
+            setParameter(parameterIndex, new JdbcParameterDate((java.util.Date) x));
             return;
         }
 
         if (clazz == java.sql.Timestamp.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.TIMESTAMP, x));
+            setParameter(parameterIndex, new JdbcParameterTimestamp((java.sql.Timestamp) x));
             return;
         }
 
         if (clazz == java.sql.Time.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.TIME, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.TIME, x));
             return;
         }
 
         if (clazz == Boolean.class) {
-            setParameter(parameterIndex, new JdbcParameter(Types.BOOLEAN, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.BOOLEAN, x));
             return;
         }
 
         if (clazz == byte[].class) {
-            setParameter(parameterIndex, new JdbcParameter(TYPE.BYTES, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(TYPE.BYTES, x));
             return;
         }
 
         if (x instanceof InputStream) {
-            setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.BinaryInputStream, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.BinaryInputStream, x));
             return;
         }
 
         if (x instanceof Reader) {
-            setParameter(parameterIndex, new JdbcParameter(JdbcParameter.TYPE.CharacterInputStream, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(JdbcParameter.TYPE.CharacterInputStream, x));
             return;
         }
 
         if (x instanceof Clob) {
-            setParameter(parameterIndex, new JdbcParameter(Types.CLOB, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.CLOB, x));
             return;
         }
 
         if (x instanceof NClob) {
-            setParameter(parameterIndex, new JdbcParameter(Types.NCLOB, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.NCLOB, x));
             return;
         }
 
         if (x instanceof Blob) {
-            setParameter(parameterIndex, new JdbcParameter(Types.BLOB, x));
+            setParameter(parameterIndex, new JdbcParameterImpl(Types.BLOB, x));
             return;
         }
 
-        setParameter(parameterIndex, new JdbcParameter(Types.OTHER, null));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.OTHER, null));
     }
 
     @Override
     public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(targetSqlType, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(targetSqlType, x));
 
         createChain().preparedStatement_setObject(this, parameterIndex, x, targetSqlType);
     }
 
     @Override
     public void setObject(int parameterIndex, Object x, int targetSqlType, int scaleOrLength) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(targetSqlType, x, -1, null, scaleOrLength));
+        setParameter(parameterIndex, new JdbcParameterImpl(targetSqlType, x, -1, null, scaleOrLength));
 
         createChain().preparedStatement_setObject(this, parameterIndex, x, targetSqlType, scaleOrLength);
     }
 
     @Override
     public void setRef(int parameterIndex, Ref x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.REF, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.REF, x));
 
         createChain().preparedStatement_setRef(this, parameterIndex, x);
     }
 
     @Override
     public void setRowId(int parameterIndex, RowId x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.ROWID, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.ROWID, x));
 
         createChain().preparedStatement_setRowId(this, parameterIndex, x);
     }
 
     @Override
     public void setSQLXML(int parameterIndex, SQLXML x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.SQLXML, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.SQLXML, x));
 
         createChain().preparedStatement_setSQLXML(this, parameterIndex, x);
     }
 
     @Override
     public void setShort(int parameterIndex, short x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.SMALLINT, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.SMALLINT, x));
 
         createChain().preparedStatement_setShort(this, parameterIndex, x);
     }
 
     @Override
     public void setString(int parameterIndex, String x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.VARCHAR, x));
+        setParameter(parameterIndex, new JdbcParameterString(x));
 
         createChain().preparedStatement_setString(this, parameterIndex, x);
     }
 
     @Override
     public void setTime(int parameterIndex, Time x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.TIME, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.TIME, x));
 
         createChain().preparedStatement_setTime(this, parameterIndex, x);
     }
 
     @Override
     public void setTime(int parameterIndex, Time x, Calendar cal) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.TIME, x, cal));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.TIME, x, cal));
 
         createChain().preparedStatement_setTime(this, parameterIndex, x, cal);
     }
 
     @Override
     public void setTimestamp(int parameterIndex, Timestamp x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.TIMESTAMP, x));
+        setParameter(parameterIndex, new JdbcParameterTimestamp(x));
 
         createChain().preparedStatement_setTimestamp(this, parameterIndex, x);
     }
 
     @Override
     public void setTimestamp(int parameterIndex, Timestamp x, Calendar cal) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(Types.TIMESTAMP, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(Types.TIMESTAMP, x));
 
         createChain().preparedStatement_setTimestamp(this, parameterIndex, x, cal);
     }
 
     @Override
     public void setURL(int parameterIndex, URL x) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.URL, x));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.URL, x));
 
         createChain().preparedStatement_setURL(this, parameterIndex, x);
     }
 
     @Override
     public void setUnicodeStream(int parameterIndex, InputStream x, int length) throws SQLException {
-        setParameter(parameterIndex, new JdbcParameter(TYPE.UnicodeStream, x, length));
+        setParameter(parameterIndex, new JdbcParameterImpl(TYPE.UnicodeStream, x, length));
 
         createChain().preparedStatement_setUnicodeStream(this, parameterIndex, x, length);
     }

src/main/java/com/alibaba/druid/stat/JdbcDataSourceStat.java

@@ -66,7 +66,7 @@ public class JdbcDataSourceStat implements JdbcDataSourceStatMBean {
                                                                                                         //
                                                                                                         });
 
-    private final ConcurrentMap<Long, JdbcConnectionStat.Entry> connections             = new ConcurrentHashMap<Long, JdbcConnectionStat.Entry>();
+    private final ConcurrentMap<Long, JdbcConnectionStat.Entry> connections             = new ConcurrentHashMap<Long, JdbcConnectionStat.Entry>(16, 0.75f, 1);
 
     private final AtomicLong                                    clobOpenCount           = new AtomicLong();
 

src/main/java/com/alibaba/druid/support/http/stat/WebAppStat.java

@@ -56,7 +56,7 @@ public class WebAppStat {
     private final AtomicLong                        jdbcCommitCount                = new AtomicLong();
     private final AtomicLong                        jdbcRollbackCount              = new AtomicLong();
 
-    private final ConcurrentMap<String, WebURIStat> uriStatMap                     = new ConcurrentHashMap<String, WebURIStat>();
+    private final ConcurrentMap<String, WebURIStat> uriStatMap                     = new ConcurrentHashMap<String, WebURIStat>(16, 0.75f, 1);
     private final LRUCache<String, WebSessionStat>  sessionStatMap;
 
     private final ReadWriteLock                     sessionStatLock                = new ReentrantReadWriteLock();

src/main/java/com/alibaba/druid/support/ibatis/SqlMapClientImplWrapper.java

@@ -39,7 +39,7 @@ public class SqlMapClientImplWrapper extends SqlMapClientImpl {
 
 	private static Method getLocalSqlMapSessionMethod = null;
 
-	private ConcurrentMap<String, IbatisStatementInfo> statementInfoMap = new ConcurrentHashMap<String, IbatisStatementInfo>();
+	private ConcurrentMap<String, IbatisStatementInfo> statementInfoMap = new ConcurrentHashMap<String, IbatisStatementInfo>(16, 0.75f, 1);
 
 	public SqlMapClientImplWrapper(SqlMapClientImpl raw) {
 		super(raw.getDelegate());

src/main/java/com/alibaba/druid/support/spring/stat/SpringStat.java

@@ -23,7 +23,7 @@ import java.util.concurrent.ConcurrentMap;
 
 public class SpringStat {
 
-    private ConcurrentMap<SpringMethodInfo, SpringMethodStat> methodStats = new ConcurrentHashMap<SpringMethodInfo, SpringMethodStat>();
+    private ConcurrentMap<SpringMethodInfo, SpringMethodStat> methodStats = new ConcurrentHashMap<SpringMethodInfo, SpringMethodStat>(16, 0.75f, 1);
 
     public SpringStat(){
 

src/main/java/com/alibaba/druid/wall/WallProvider.java

@@ -59,8 +59,8 @@ public abstract class WallProvider {
 
     private static final ThreadLocal<Boolean>             privileged              = new ThreadLocal<Boolean>();
 
-    private final ConcurrentMap<String, WallFunctionStat> functionStats           = new ConcurrentHashMap<String, WallFunctionStat>();
-    private final ConcurrentMap<String, WallTableStat>    tableStats              = new ConcurrentHashMap<String, WallTableStat>();
+    private final ConcurrentMap<String, WallFunctionStat> functionStats           = new ConcurrentHashMap<String, WallFunctionStat>(16, 0.75f, 1);
+    private final ConcurrentMap<String, WallTableStat>    tableStats              = new ConcurrentHashMap<String, WallTableStat>(16, 0.75f, 1);
 
     public final WallDenyStat                             commentDeniedStat       = new WallDenyStat();