refactor

src/main/java/com/alibaba/druid/util/JdbcUtils.java

@@ -16,12 +16,8 @@
 package com.alibaba.druid.util;
 
 import java.io.Closeable;
-import java.io.IOException;
 import java.io.InputStream;
 import java.io.PrintStream;
-import java.io.PrintWriter;
-import java.io.Reader;
-import java.io.StringWriter;
 import java.net.URL;
 import java.sql.Connection;
 import java.sql.Date;
@@ -32,7 +28,6 @@ import java.sql.ResultSetMetaData;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.sql.Types;
-import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.LinkedHashMap;
@@ -356,46 +351,6 @@ public final class JdbcUtils {
         }
     }
 
-    public static String read(Reader reader) {
-        try {
-            final int DEFAULT_BUFFER_SIZE = 1024 * 4;
-
-            StringWriter writer = new StringWriter();
-
-            char[] buffer = new char[DEFAULT_BUFFER_SIZE];
-            int n = 0;
-            while (-1 != (n = reader.read(buffer))) {
-                writer.write(buffer, 0, n);
-            }
-
-            return writer.toString();
-        } catch (IOException ex) {
-            throw new IllegalStateException("read error", ex);
-        }
-    }
-
-    public static String read(Reader reader, int length) {
-        try {
-            char[] buffer = new char[length];
-
-            int offset = 0;
-            int rest = length;
-            int len;
-            while ((len = reader.read(buffer, offset, rest)) != -1) {
-                rest -= len;
-                offset += len;
-
-                if (rest == 0) {
-                    break;
-                }
-            }
-
-            return new String(buffer, 0, length - rest);
-        } catch (IOException ex) {
-            throw new IllegalStateException("read error", ex);
-        }
-    }
-
     public static String getDriverClassName(String rawUrl) throws SQLException {
         if (rawUrl.startsWith("jdbc:derby:")) {
             return "org.apache.derby.jdbc.EmbeddedDriver";
@@ -518,21 +473,6 @@ public final class JdbcUtils {
         }
     }
 
-    public static String getStackTrace(Throwable ex) {
-        StringWriter buf = new StringWriter();
-        ex.printStackTrace(new PrintWriter(buf));
-
-        return buf.toString();
-    }
-
-    public static String toString(java.util.Date date) {
-        if (date == null) {
-            return null;
-        }
-        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
-        return format.format(date);
-    }
-
     public static Driver createDriver(String driverClassName) throws SQLException {
         try {
             return (Driver) Class.forName(driverClassName).newInstance();
@@ -646,13 +586,4 @@ public final class JdbcUtils {
             stmt.setObject(i + 1, parameters.get(i));
         }
     }
-
-    public static String toString(StackTraceElement[] stackTrace) {
-        StringBuilder buf = new StringBuilder();
-        for (StackTraceElement item : stackTrace) {
-            buf.append(item.toString());
-            buf.append("\n");
-        }
-        return buf.toString();
-    }
 }