#Batch Insert test.

.gitignore

@@ -2,4 +2,5 @@
 out
 target
 !.gitignore
-*.iml
+*.iml
+classes

src/test/java/jdbc/BatchInsert.java

@@ -0,0 +1,48 @@
+package jdbc;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+
+public class BatchInsert {
+    public static void main(String[] args) throws SQLException {
+
+        Connection conn = null;
+        try {
+            Class.forName("com.mysql.jdbc.Driver");
+            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/rainbow?user=root&password=jack_bai?useSSL=false");
+
+            conn.setAutoCommit(false);
+            PreparedStatement ps = conn.prepareStatement("insert into userinfo (name, salary,comment, password,email) values(?,?,?,?,?)");
+
+            for (int i = 0; i < 20980; i++) {
+                ps.setString(1, "name" + i);
+                ps.setDouble(2, i);
+                ps.setString(3, "comment" + i);
+                ps.setString(4, "pwd" + i);
+                ps.setString(5, "[email protected]");
+                ps.addBatch();
+
+                if (i % 100 == 0) {
+                    ps.executeBatch();
+                    ps.clearParameters();
+                    System.out.println("Executed once!");
+
+                }
+            }
+            ps.executeBatch();
+
+            conn.commit();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        } finally {
+            conn.close();
+
+        }
+
+
+    }
+}

threadLearn/src/jvm/GCTest.java

@@ -1,7 +1,5 @@
 package jvm;
 
-import com.sun.glass.ui.Size;
-
 /**
  * Created by pengfei on 2017/9/6.
  */

threadLearn/src/jvm/UnSafeMem.java

@@ -1,12 +1,15 @@
+/*
 package jvm;
 
 import sun.misc.Unsafe;
 
 import java.lang.reflect.Field;
 
+*/
 /**
  * Created by pengfei on 2017/9/6.
- */
+ *//*
+
 public class UnSafeMem {
     private static final int _1M=1024*1024;
 
@@ -21,3 +24,4 @@ public static void main(String[] args) throws IllegalAccessException {
 
     }
 }
+*/