JDBC访问Mysql进行读写分离测试

在程序中添加两个数据源、分别对应读跟写：

#读#
DBDriver=com.mysql.jdbc.Driver
url=jdbc\:mysql\:loadbalance\://10.11.0.75,172.16.0.202\:3306/DB_TEST7?roundRobinLoadBalance\=true&characterEncoding\=UTF-8
name=TESTUSER
pass=TESTPWD
characterEncoding=utf8  

#写#
DBDriver=com.mysql.jdbc.Driver
url=jdbc\:mysql\:loadbalance\://10.11.2.126\:3306/DB_TEST7?roundRobinLoadBalance\=true&characterEncoding\=UTF-8
name=TESTUSER
pass=TESTPWD
characterEncoding=utf8

测试类：

/**
 * 数据连接类
 * @author 胡汉三
 *
 */
public class UtilDao {
    static Properties properties = null;
    public UtilDao(String rw){
    	//读取属性文件
		properties = new Properties();
		java.io.InputStream in = null;
		if(rw.equals("R")){
			in = (java.io.InputStream) this.getClass()
			.getResourceAsStream("/mysqlDBR.properties");
		}else if (rw.equals("W")){
			in = (java.io.InputStream) this.getClass()
			.getResourceAsStream("/mysqlDBW.properties");
		}
		try {
			properties.load(in);
		} catch (IOException ex) {  
			System.out.println(ex.getMessage());
			ex.printStackTrace();
		}
    }
    public Connection getConn(){
    	Connection connection = null;
    	try{
    		Class.forName(properties.getProperty("DBDriver"));
    		connection = DriverManager.getConnection(properties.getProperty("url"),properties.getProperty("name"),properties.getProperty("pass"));
    	}catch (Exception err) {
        	System.out.println("连接ConDB-->getCon()____JDBC错误!");
            err.printStackTrace();  
            return null;   
        }
        return connection;
    }
    
    public static void main(String[] args) throws SQLException {
    	UtilDao uW = new UtilDao("W"); 
    	UtilDao uR = new UtilDao("R");
    	Connection connR = uR.getConn();  //connectionsToHostsMap()
    	Connection connW = uW.getConn();  //connectionsToHostsMap()
    	connW.setAutoCommit(false);  //自动提交为False
    	connR.setAutoCommit(false);  //自动提交为False
    	String inSql = "insert into city(sname) values('复制')";
    	String sql = "select * from city where sname = '复制'";
    	Statement sW = connW.createStatement(); 
    	Statement sR = connR.createStatement(); 
	    	try {
				sW.execute(inSql); 
				connW.commit();  
			} catch (Exception e) {
				connW.rollback();
				e.printStackTrace();
			}
    	ResultSet r = sR.executeQuery(sql);
    	int l = 0 ;
    	while (r.next()){
    		System.out.println(r.getString("sname")+" " +r.getString("Id")+"    第："+l+"条");
    		l++;
    	}
    	r.close();
    	sW.close();  
    	sR.close();
    	connW.close();
    	connR.close();
	}

输出：

复制 737    第：0条
复制 738    第：1条