jdbc_demo
JDBC_DEMO
- ORACLE|MYSQL|DB2的pom
- jdbc的url用户名密码
- mysql
- oracle
- db2
- 判断dbType类型
- conn|statment|result
- 正常的写法
- 批量插入写
- mysql|oracle|db2分页
ORACLE|MYSQL|DB2的pom
云桌面的环境可以使用
com.oracle
ojdbc6
11.2.0.1.0
mysql/groupId>
mysql-connector-java
5.1.32
com.ibm.db2/groupId>
db2jcc4
9.7.6
jdbc的url用户名密码
mysql
driver = "com.mysql.jdbc.Driver";
url = "jdbc:mysql://127.0.0.1:3306/maqingbin?useUnicode=true&characterEncoding=utf-8";
user = "root";
password = "password";
oracle
driver = "oracle.jdbc.driver.OracleDriver";
url = "jdbc:oracle:thin:@192.168.201.189:1521:xxxsidxxx";
user = "maqingbin";
password = "123456";
db2
driver = com.ibm.db2.jcc.DB2Driver
url = jdbc:db2://197.3.196.105:60000/db2pcip:currentSchema=CDC;
user = root
password = password
判断dbType类型
String databaseProductName = conn.getMetaData().getDatabaseProductName();
private DbType getDbType(String databaseProductName){
if("MySQL".equalsIgnoreCase(databaseProductName)){
return DbType.MYSQL;
}else if("Oracle".equalsIgnoreCase(databaseProductName)){
return DbType.ORACLE;
}else if(databaseProductName.CONTAINS("DB2")){
return DbType.DB2;;
}else{
throw new UnsupportedOperationException(databaseProductName+" unsupport this database");
}
}
conn|statment|result
正常的写法
for(int i=0;i<2;i++){
String sql="SELECT * FROM t_order WHERE user_id=?"; //后面不要写分号;
try{
Connection connection=dataSource.getConnetion();
//后面的参数为了获取主键使用
PreparedStatement preparedStatement = connection.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
preparedStatement.setInt(1,10);
preparedStatement.setTimestamp(2,new Timestamp(System.currentTimeMillis()));
preparedStatement.setObject(3,xxxObjectxxx);//如果后台表是BLOB是序列化对象 mysql好用
preparedStatement.setBytes(4,bytes[]);
ResultSet resultSet = preparedStatement.executeQuery();
while(resultSet.next()){
...
}
//获取主键
ResultSet generatedKeys = preparedStatement.getGeneratedKeys();
if (generatedKeys.next()) {
int id = generatedKeys.getInt(1);
}
}
}
批量插入写
String sql="insert into order_info(order_id,cust_id,extra) values (?,?,?),(?,?,?)"; //后面不要写分号;
Object[] params = new Object[]{"order001","cust01","aaa","order002","cust02","bbb"};
try{
Connection connection=dataSource.getConnetion();
//后面的参数为了获取主键使用
PreparedStatement preparedStatement = connection.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
for(int i=0;i