log

wade6 · wade6 · commit e671371c17d4 · 2018-09-03T23:48:24.000+08:00
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
diff --git a/src/main/java/com/code/repository/study/io/FileInputStreamTest.java b/src/main/java/com/code/repository/study/io/FileInputStreamTest.java
@@ -1,5 +1,6 @@
 package com.code.repository.study.io;
 
+import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 
@@ -14,7 +15,8 @@ public static void main(String[] args) throws IOException {
 		FileInputStream fis = null;
 		try {
 			// 创建字节文件输入流
-			fis = new FileInputStream("fileInputStream.txt");
+			System.out.println(new File(".").getAbsolutePath());//相对工程目录
+			fis = new FileInputStream("src/main/resources/fileInputStream.txt");
 			// 最多读64字节
 			byte[] b = new byte[64];
 			// 实际读取字节数
diff --git a/src/main/java/com/code/repository/study/jdbc/JdbcDemo.java b/src/main/java/com/code/repository/study/jdbc/JdbcDemo.java
@@ -1,5 +1,7 @@
 package com.code.repository.study.jdbc;
 
+import com.mysql.jdbc.Driver;
+
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
@@ -27,25 +29,24 @@ public static void main(String[] args) {
         Connection conn = null;
         try {
             // 加载MySQL的数据驱动程序
-            Class.forName("com.mysql.jdbc.Driver");
+//            Class.forName("com.mysql.jdbc.Driver"); // jdk1.6 之后可以不用再调用这句
+//            DriverManager.registerDriver(new Driver());
             // 创建数据连接对象
             conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
             // 创建Statement对象
             Statement statement = conn.createStatement();
-
-            // 执行一条sql
+            // 执行sql
             // 通过execuUpdate()方法用来数据的更新，包括插入和删除等操；
-            // 通过xecuteQuery()方法进行数据的查询，而查询结果会得到 ResulSet对象
-            statement.executeUpdate( "INSERT INTO user(gmt_create, gmt_modified,user_name)" + " VALUES (now(),now(),'jdbcTest') ") ;
+            String userName = "tst"+ System.currentTimeMillis();
+            statement.executeUpdate( "INSERT INTO user(gmt_create, gmt_modified,user_name)" + " VALUES (now(),now(),'"+userName+"') ") ;
+            // 通过executeQuery()方法进行数据的查询，而查询结果会得到 ResulSet对象
             ResultSet resultSel = statement.executeQuery( "select * from user" );
             while(resultSel.next()){
                 String username = resultSel.getString("user_name");
-                System.out.println(username);
+                System.out.println("userName:"+username);
             }
             conn.close();
-        } catch (ClassNotFoundException e) {
-            System.out.println(e);
-        } catch (SQLException e) {
+        } catch (Exception e) {
             System.out.println(e);
         }finally{
             if(conn!=null){
diff --git a/src/main/java/com/code/repository/study/log/LogDemo.java b/src/main/java/com/code/repository/study/log/LogDemo.java
@@ -0,0 +1,29 @@
+package com.code.repository.study.log;
+
+import java.io.IOException;
+import java.util.logging.*;
+
+public class LogDemo {
+
+    public static void main(String[] args) throws IOException {
+        //日志记录器
+        Logger logger = Logger.getLogger("logdemo");
+
+        //====使用文件输出日志===
+        //日志处理器
+        FileHandler fileHandler = new FileHandler("d:\\test.txt");
+        //为处理器设置日志格式：Formatter
+        SimpleFormatter sf = new SimpleFormatter();
+        fileHandler.setFormatter(sf);
+        //注册处理器
+        logger.addHandler(fileHandler);
+        //====使用文件输出日志 end===
+
+        //需要记录的日志消息
+        LogRecord lr = new LogRecord(Level.INFO, "This is a text log.");
+        //记录日志消息
+        logger.log(lr);
+    }
+
+
+}
diff --git a/src/main/java/com/code/repository/study/mybatis/mybatisDemo.java b/src/main/java/com/code/repository/study/mybatis/mybatisDemo.java
@@ -11,15 +11,19 @@
 public class mybatisDemo {
     
     public static void main(String[] args) throws IOException {
-        String resource = "mybatis/mybatis-config.xml";
-        InputStream inputStream = Resources.getResourceAsStream(resource);
+        // 加载mybatise配置文件
+        String resource = "mybatis/mybatis-config.xml";// 配置信息
+        InputStream inputStream = Resources.getResourceAsStream(resource);// 获取配置文件输入流
+        // 初始化sessionFactory
         SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
-
+        // 获取SqlSession
         SqlSession session = sqlSessionFactory.openSession();
+        // 执行sql调用
         try {
-            UserDO userDO = (UserDO) session.selectOne("org.mybatis.userMapper.selectByName", "jdbcTest");
+            UserDO userDO = (UserDO) session.selectOne("org.mybatis.userMapper.selectByName", "tom");
             System.out.println("===> userId:"+userDO.getId());
         } finally {
+            // 关闭session
             session.close();
         }
     }  
diff --git a/src/main/resources/fileInputStream.txt b/src/main/resources/fileInputStream.txt
@@ -0,0 +1,3 @@
+12
+abc
+你好
