db util

/**
 * @author ivan
 *此对象用于读取配置文件的信息
 */
public class ReadProperties {
	/*
	 * 加载指定路径下的配置文件信息,并获得Properties对象
	 *  (non-Javadoc)
	 * @see com.voole.interf.IProperties#getProperties()
	 * @return Properties对象
	 */
	public static Properties getProperties() {
		return getProperties("/config.properties");
	}
	
	public static Properties getProperties(String path) {
		InputStream inStream = ReadProperties.class.getResourceAsStream(path);
		Properties prop = new Properties();
		try {
			if(inStream != null){
				prop.load(inStream);
				inStream.close();
			}
		} catch (IOException e) {
			System.out.println("加载指定路径下的配置文件出错！"+e.getMessage());
		}
		return prop;
	}
	
	//使用
	public static void main(String[] args) {
		Properties pr = ReadProperties.getProperties();
		System.out.println("mysql connection -- " + pr.getProperty("SQL_DRIVER"));
	}
}

public final class ConnectionManager {

    private ComboPooledDataSource ds;

    private ConnectionManager(String propertiesPath) throws Exception {
        
        ds = new ComboPooledDataSource();
        
        Properties properties = ReadProperties.getProperties(propertiesPath);

//        ds.setDriverClass("oracle.jdbc.driver.OracleDriver");
//        ds.setJdbcUrl("jdbc:oracle:thin:@127.0.0.1:1521:orcl");
//        ds.setUser("test");
//        ds.setPassword("testtest");
        
        ds.setDriverClass(properties.getProperty("SQL_DRIVER"));
        ds.setJdbcUrl(properties.getProperty("CONTEST_CONN_URL"));

        //初始化时获取三个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3 initialPoolSize
        ds.setInitialPoolSize(3);
        //连接池中保留的最大连接数。Default: 15 maxPoolSize
        ds.setMaxPoolSize(50);
        //// 连接池中保留的最小连接数。
        //ds.setMinPoolSize(1);
        //当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 acquireIncrement
        ds.setAcquireIncrement(1);

        //每60秒检查所有连接池中的空闲连接。Default: 0  idleConnectionTestPeriod
        ds.setIdleConnectionTestPeriod(60);
        //最大空闲时间,25000秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0  maxIdleTime
        ds.setMaxIdleTime(25000);
        //连接关闭时默认将所有未提交的操作回滚。Default: false autoCommitOnClose
        ds.setAutoCommitOnClose(true);

        //定义所有连接测试都执行的测试语句。在使用连接测试的情况下这个一显著提高测试速度。注意：
        //测试的表必须在初始数据源的时候就存在。Default: null  preferredTestQuery
        ds.setPreferredTestQuery("select now()");
        // 因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的
        // 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable
        // 等方法来提升连接测试的性能。Default: false testConnectionOnCheckout
        ds.setTestConnectionOnCheckout(false);
        //如果设为true那么在取得连接的同时将校验连接的有效性。Default: false  testConnectionOnCheckin
        ds.setTestConnectionOnCheckin(true);

        //定义在从数据库获取新连接失败后重复尝试的次数。Default: 30  acquireRetryAttempts
        ds.setAcquireRetryAttempts(30);
        //两次连接中间隔时间，单位毫秒。Default: 1000 acquireRetryDelay
        ds.setAcquireRetryDelay(1000);
        //获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效
        //保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试
        //获取连接失败后该数据源将申明已断开并永久关闭。Default: false  breakAfterAcquireFailure
        ds.setBreakAfterAcquireFailure(true);
       
       

        //        <!--当连接池用完时客户端调用getConnection()后等待获取新连接的时间，超时后将抛出
        //        SQLException,如设为0则无限期等待。单位毫秒。Default: 0 -->
        //        <property name="checkoutTimeout">100</property>

        //        <!--c3p0将建一张名为Test的空表，并使用其自带的查询语句进行测试。如果定义了这个参数那么
        //        属性preferredTestQuery将被忽略。你不能在这张Test表上进行任何操作，它将只供c3p0测试
        //        使用。Default: null-->
        //        <property name="automaticTestTable">Test</property>

        //        <!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements
        //        属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。
        //        如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0-->
        //        <property name="maxStatements">100</property>

        //        <!--maxStatementsPerConnection定义了连接池内单个连接所拥有的最大缓存statements数。Default: 0 -->
        //        <property name="maxStatementsPerConnection"></property>

        //        <!--c3p0是异步操作的，缓慢的JDBC操作通过帮助进程完成。扩展这些操作可以有效的提升性能
        //        通过多线程实现多个操作同时被执行。Default: 3-->
        //        <property name="numHelperThreads">3</property>

        //        <!--用户修改系统配置参数执行前最多等待300秒。Default: 300 -->
        //        <property name="propertyCycle">300</property>

    }
    
    private static Map<String , ConnectionManager> managers = new HashMap<String, ConnectionManager>();
    
    public static synchronized ConnectionManager getConnectionManager(String propertiesPath){
    	ConnectionManager manager = managers.get(propertiesPath);
    	if(manager == null){
    		try {
				manager = new ConnectionManager(propertiesPath);
				managers.put(propertiesPath, manager);
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
    		
    	}
    	return manager;
    }


    public Connection getConnection() throws SQLException {    
    	return ds.getConnection();
    }

    protected void finalize() throws Throwable {
        DataSources.destroy(ds); //关闭datasource
        super.finalize();
    }
    
    public static void closeConnection(Connection c){
    	try {
    		if(c != null)
    			c.close();
		} catch (SQLException e) {
			
		}
    }
    
    public static void closeStatement(Statement c){
    	try {
    		if(c != null)
    			c.close();
		} catch (SQLException e) {
			
		}
    }
    
    public static void closeResultSet(ResultSet c){
    	try {
    		if(c != null)
    			c.close();
		} catch (SQLException e) {
			
		}
    }
}

public class DB {
	
	public static Connection getConnection(String sqlDriver, String url) {
			Connection conn = null;
			try {
				Class.forName(sqlDriver);
			} catch (ClassNotFoundException e) {
				e.printStackTrace();
			}
			try {
				conn = DriverManager.getConnection(url);
			} catch (SQLException e) {
				try {
					Thread.sleep(5000);
					getConnection(sqlDriver, url);
				} catch (InterruptedException e1) {
					e1.printStackTrace();
				}
				e.printStackTrace();
			}
		return conn;
	}
	
	//通过数据库连接池c3p0获取connection
	public static Connection getConnection(String propertyName){
		Connection conn = null;
		ConnectionManager manager = ConnectionManager.getConnectionManager(propertyName);
		try {
			conn = manager.getConnection();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return conn;
	}
	
	public static Statement getStatement(Connection conn) {
		Statement stmt = null;
		try {
			stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return stmt;
	}
	
	public static PreparedStatement getPrepaStatement (Connection conn,String sql) {
		
		PreparedStatement ps = null;
		
		try {
			ps = conn.prepareStatement(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
		return ps;
		
	}
	
	public static ResultSet getResultSet(Statement stmt,String sql){
		ResultSet rs = null;
		try {
			rs = stmt.executeQuery(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
		return rs;
		
	}
	
	public static void update(Statement stmt,String sql){
		try {
			stmt.executeUpdate(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
	
	public static void closeConnection(Connection conn){
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void closeStatement(Statement stmt){
		if (stmt != null) {
			try {
				stmt.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void closeResultSet(ResultSet rs){
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	
	

}

	public void updateIndex() {
		Connection conn = null;
		Statement stmt = null;
		ResultSet rs = null;
		try {
			conn = manager.getConnection();
			stmt = DB.getStatement(conn);
			String sqlSum = "select count(*) from IndexServiceCompany where ExecStatus=1";
			rs = DB.getResultSet(stmt, sqlSum);
			int recordSum = 0;
			while (rs.next()) {
				recordSum = rs.getInt(1);
			}

			int createTotal = 0;
			if (recordSum > 0) {
				createTotal = recordSum / indexSize + 1; // 要创建总次数
				for (int j = 0; j < createTotal; j++) {
					String sql = "select TOP ("
							+ indexSize
							+ ")*  from IndexServiceCompany where ExecStatus=1 order by IID ";
					String update = "";
					rs = DB.getResultSet(stmt, sql);
					int status = 0;

					while (rs.next()) {
						iid = rs.getInt("IID");
						status = rs.getInt("EditStatus");

						switch (status) {
						case 1:
							update(conn, rs.getString("TableName"), rs
									.getString("ObjectCode"));// 也是新增的代码
							System.out.println("新增...");
							break;
						case 2:
							update(conn, rs.getString("TableName"), rs
									.getString("ObjectCode"));
							System.out.println("更新...");
							break;
						case 3:
							delete(rs.getString("ObjectCode"));
						default:
							break;
						}
						update += iid + ",";
						
					}
					
					//批量提交docs给solr
					if (addDocs.size() > 0) {
						solrServer.add(addDocs);
						solrServer.commit();
						System.out.println("此次更新记录数 ：" + addDocs.size() + "条");
						addDocs.clear();
					}
					
					// 更新数据库，标示此条记录已跟新到solr索引中
					update = update.substring(0, update.length() - 1);
					String upSql = "update IndexServiceCompany set ExecStatus=2, ExecTime=getdate() where IID in ("
							+ update + ")";
					DB.update(stmt, upSql);

					System.out
							.println(new Date() + " -- 第 " + (j + 1) + " 更新OK");
				}// for over

				
			} else {
				System.out.println(new Date() + " -- no data ...");
			}
		} catch (SQLException e) {
			e.printStackTrace();
		} catch (SolrServerException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			ConnectionManager.closeResultSet(rs);
			ConnectionManager.closeStatement(stmt);
			ConnectionManager.closeConnection(conn);
		}
	}