/*
：
， ， 、、、、 。
， 。
：20131003
：
*/
public class PiChuLi {
public static void main(String[] args) throws SQLException {
// TODO Auto-generated method stub
create();
}
static void create() throws SQLException
{
Connection conn=null;
PreparedStatement ps=null;
ResultSet resultset=null;
try {
//2.
conn=JdbcUtils.getConnection();
//3.
String sql="insert into user(name,birthday,money) values(?,?,?)";
ps=conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
for(int i=0;i<1000;i++)
{
ps.setString(1, "sdmf"+i);
ps.setDate(2, new java.sql.Date(System.currentTimeMillis()));
ps.setFloat(3, 345+i);
ps.addBatch();
}
ps.executeBatch();
} finally
{
JdbcUtils.free(resultset, ps, conn);
}
}
}
----------------------------------------------------------------------------------------------------------
/*
：
， API
：20131003
：
*/
public class OtherApi {
public static void main(String[] args) throws SQLException {
int id=create();
System.out.println(id);
}
//
static int create() throws SQLException
{
Connection conn=null;
PreparedStatement ps=null;
ResultSet resultset=null;
try {
//2.
conn=JdbcUtils.getConnection();
//3.
String sql="insert into user(name,birthday,money) values('wy','2011-09-23','2894656')";
ps=conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
ps.executeUpdate();
resultset=ps.getGeneratedKeys();
int id=0;
if(resultset.next())
{
id=resultset.getInt(1);
}
return id;
} finally
{
JdbcUtils.free(resultset, ps, conn);
}
}
}
-------------------------------------------------------------------------------------------------------------
/*
：
：20131003
：
*/
public class ScrollAPIDemo {
public static void main(String[] args) throws SQLException {
scroll();
}
//
//
static void scroll() throws SQLException
{
Connection conn=null;
Statement st=null;
ResultSet resultset=null;
try {
//2.
conn=JdbcUtils.getConnection();
//3.
st=conn.createStatement();
//4.
String sql="select id,name,birthday,money from user";
resultset=st.executeQuery(sql);
resultset.absolute(8);
System.out.println();
if(resultset.previous())
{
System.out.println(
resultset.getObject("id")+"\t"+
resultset.getObject("name")+"\t"+
resultset.getObject("birthday")+"\t"+
resultset.getObject("money")+"\t"
);
}
// MySQL
// MySQL sql ：
//select id,name,birthday,money from user limit 100,10
//
resultset.absolute(100);
int i=0;
while(resultset.next()&&i<10)
{
i++;
System.out.println(
resultset.getObject("id")+"\t"+
resultset.getObject("name")+"\t"+
resultset.getObject("birthday")+"\t"+
resultset.getObject("money")+"\t"
);
}
} finally
{
JdbcUtils.free(resultset, st, conn);
}
}
}
-------------------------------------------------------------------------------------------------------------
/*
：
：20131003
：
*/
public class UpdateKeGengXin {
/**
* @param args
* @throws SQLException
*/
public static void main(String[] args) throws SQLException {
// TODO Auto-generated method stub
read();
}
// ， ，
static void read() throws SQLException
{
Connection conn=null;
Statement st=null;
ResultSet resultset=null;
try {
//2.
conn=JdbcUtils.getConnection();
//3.
st=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
//4.
resultset=st.executeQuery("select id,name,birthday,money from user where id<10");
//5.
while(resultset.next())
{
System.out.println(resultset.getObject("id"));
System.out.println(resultset.getObject("name"));
System.out.println(resultset.getObject("birthday"));
System.out.println(resultset.getObject("money"));
String name=resultset.getString("name");
if("wangwu".equals(name))
{
resultset.updateFloat("money", 123);
resultset.updateRow();
}
}
} finally
{
JdbcUtils.free(resultset, st, conn);
}
}
}
-----------------------------------------------------------------------------------------------------------
/*
：
：20131003
：
*/
public class DBMD {
//
public static void main(String[] args) throws SQLException {
Connection conn=JdbcUtils.getConnection();
DatabaseMetaData dbmd=conn.getMetaData();
System.out.println(dbmd.getDatabaseMajorVersion());
//
System.out.println(dbmd.getDatabaseProductName());
//
System.out.println(dbmd.getDatabaseProductVersion());
//
System.out.println(dbmd.supportsTransactions());
}
}