From 66d631097fba39093df2defb82ce4d5cf000fbd3 Mon Sep 17 00:00:00 2001
From: you <284908631@qq.com>
Date: Mon, 1 Jun 2020 23:49:06 +0800
Subject: [PATCH] add JDBCBEAN

---
 .gitignore                        |   5 +++
 WebContent/config/db.properties   |   4 ---
 build/classes/javabean/Base.class | Bin 2824 -> 2830 bytes
 src/javabean/Base.java            |   4 +--
 src/javabean/JDBCBean.java        |  55 ++++++++++++++++++++++++++++++
 5 files changed, 62 insertions(+), 6 deletions(-)
 create mode 100644 .gitignore
 delete mode 100644 WebContent/config/db.properties
 create mode 100644 src/javabean/JDBCBean.java

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0155006
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.classpath
+.project
+.metadata
+.settings
+build
\ No newline at end of file
diff --git a/WebContent/config/db.properties b/WebContent/config/db.properties
deleted file mode 100644
index 9bccda5..0000000
--- a/WebContent/config/db.properties
+++ /dev/null
@@ -1,4 +0,0 @@
-driver=com.mysql.jdbc.Driver
-url=jdbc:mysql://localhost:3306/library?useSSl=true&userUnicode=true&characterEncoding=utf-8
-username=root
-password=root
diff --git a/build/classes/javabean/Base.class b/build/classes/javabean/Base.class
index 5a28c3459c1deaaedc104e0ab445964be2d573c6..759f72be05cdcafc5ded32539df8ee964b51c0ce 100644
GIT binary patch
delta 143
zcmeAW>l2%>o-usl2IGxS1UNYNGO#ePGB7Y$O#aKE!mWFZflHJ{ci+PQFDGkoYQ^X?
zcrutWcrnNTRoF4Gfz&ZrGFSm=5X+CjpMep~3IfV8fmy)}Aq>n6LJYDDp$uU_vrU1#
b7%<BgD9_En!vBYXm67ik1J~x&oUx1mZoC-j

delta 138
zcmeAZ>kyl;o-tzL24lvejgJL5IJYsdFt9Q(FqlmK!=b`1%A&h(;s3XjwK=sSwHZ7a
z3>mx_WPq}E3~V4Z43-R5KpMpIWAJBS1hayGa!g=WFhd9fGlLL=Bts}e7|>ipATI{Y
WvIWX>FfjA~VPIwC+q{u8mJtBSJ{K_n

diff --git a/src/javabean/Base.java b/src/javabean/Base.java
index 02b504f..5a915c2 100644
--- a/src/javabean/Base.java
+++ b/src/javabean/Base.java
@@ -13,7 +13,7 @@ import com.mysql.jdbc.PreparedStatement;
 public class Base {
 	
 	private static String driver = "com.mysql.jdbc.Driver";
-	private static String url = "jdbc:mysql://localhost:3306/library?useSSl=true&userUnicode=true&characterEncoding=utf-8";
+	private static String url = "jdbc:mysql://localhost:3306/library?useSSl=true&useUnicode=true&characterEncoding=utf-8";
 	private static String username = "root";
 	private static String password = "root";
 	
@@ -67,7 +67,7 @@ public class Base {
     	if(preparedStatement == null){
             preparedStatement = (PreparedStatement) connection.prepareStatement(sql);
         }
-        for(int i = 0; i < params.length; i++){
+        for(int i = 0; params != null && i < params.length; i++){
             preparedStatement.setObject(i+1, params[i]);
         }
         int updateRows = preparedStatement.executeUpdate();
diff --git a/src/javabean/JDBCBean.java b/src/javabean/JDBCBean.java
new file mode 100644
index 0000000..dd0944d
--- /dev/null
+++ b/src/javabean/JDBCBean.java
@@ -0,0 +1,55 @@
+package javabean;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+public class JDBCBean {
+	private static String driver = "com.mysql.jdbc.Driver";
+	private static String url = "jdbc:mysql://localhost:3306/library?useSSl=true&useUnicode=true&characterEncoding=utf-8";
+	private static String username = "root";
+	private static String password = "root";
+	private Connection conn = null;
+	private Statement stmt = null;
+	
+	public JDBCBean() {
+		try {
+			Class.forName(driver);
+			conn = DriverManager.getConnection(url, username, password);
+			stmt = conn.createStatement();
+			System.out.println("同数据库建立连接！");
+		} catch (Exception ex) {
+			System.out.println("无法同数据库建立连接！");
+		}
+	}
+
+	public int executeUpdate(String s) {
+		int result = 0;
+		try {
+			System.out.println(s + "------" + stmt + "-----");
+			result = stmt.executeUpdate(s);
+		} catch (Exception e) {
+			System.out.println("执行更新错误！");
+		}
+		return result;
+	}
+
+	public ResultSet executeQuery(String s) {
+		ResultSet rs = null;
+		try {
+			rs = stmt.executeQuery(s);
+		} catch (Exception e) {
+			System.out.println("执行查询错误！");
+		}
+		return rs;
+	}
+
+	public void close() {
+		try {
+			stmt.close();
+			conn.close();
+		} catch (Exception e) {
+			
+		}
+	}
+}