Java Code Examples for com.mysql.jdbc.Connection#close()
The following examples show how to use
com.mysql.jdbc.Connection#close() .
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Example 1
| Source File: DBUtils.java From StudentManagement with MIT License | 5 votes |
|
/**
* 关闭数据库连接
* @param conn Connection对象
*/
public static void closeConnection(Connection conn) {
//判断conn是否为空
if(conn != null){
try {
conn.close();//关闭数据库连接
} catch (SQLException e) {
// TODO: handle exception
e.printStackTrace();
}
}
}
Example 2
| Source File: FabricMySQLConnectionProxy.java From r-course with MIT License | 5 votes |
|
/**
* Close this connection proxy which entails closing all
* open connections to MySQL servers.
*/
public void close() throws SQLException {
this.closed = true;
for (Connection c : this.serverConnections.values()) {
try {
c.close();
} catch (SQLException ex) {
}
}
}
Example 3
| Source File: FabricMySQLConnectionProxy.java From Komondor with GNU General Public License v3.0 | 5 votes |
|
/**
* Close this connection proxy which entails closing all
* open connections to MySQL servers.
*/
public void close() throws SQLException {
this.closed = true;
for (Connection c : this.serverConnections.values()) {
try {
c.close();
} catch (SQLException ex) {
}
}
}
Example 4
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 5 votes |
|
@Override
public List<Room> getAllRoom() {
Connection conn=null;
try{
conn=getConnection();
String sql="SELECT * FROM `scada`.`meet_room`;";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ResultSet rs=ps.executeQuery();
List<Room> lr=new ArrayList<Room>();
while(rs.next()){
Room r=new Room();
r.setMeetroom_id(rs.getInt(1));
r.setTime(rs.getString(2));
r.setUseful(rs.getString(3));
r.setNum(rs.getInt(4));
lr.add(r);
r=null;
}
conn.close();
conn=null;
return lr;
}catch(Exception e)
{
e.printStackTrace();
}
return null;
}
Example 5
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 5 votes |
|
@Override
public void updateAndDelete(int id) {
ActionContext actionContext = ActionContext.getContext();
Map<String, Object> session = actionContext.getSession();
String select=(String) session.get("select");
String message=(String) session.get("message");
Connection conn=null;
String sql=null;
if(!message.equals("")){
if(select.equals("id")){
try{
conn=getConnection();
sql="UPDATE `scada`.`meet_room` SET `useful`='����' WHERE `meetroom_id`="+"'"+id+"'";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ps.executeUpdate();
//MeetManager meetManager=(MeetManager)this.getSessionFactory().openSession().get(MeetManager.class, id);
//this.getHibernateTemplate().delete(meetManager);
//this.getSessionFactory().openSession().close();
conn.close();
conn=null;
System.out.println(conn);
}catch(Exception e){
System.out.println(e);
}
}
}
}
Example 6
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 5 votes |
|
@Override
public String queryRoomUseful(String id) {
String sql=null;
Connection conn=null;
String useful=null;
try{
conn=getConnection();
sql="SELECT `useful` FROM scada.meet_room WHERE `meetroom_id`="+id;
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ResultSet rs=ps.executeQuery();
while(rs.next()){
useful=rs.getString("useful");
}
conn.close();
conn=null;
return useful;
}catch(Exception e){
}
return useful;
}
Example 7
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 5 votes |
|
@Override
public String check(String id){
Connection conn=null;
String sql=null;
String sql_1=null;
try{
conn=getConnection();
sql="SELECT `meet_id` FROM scada.meet_manager WHERE meet_id="+id;
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ResultSet rs=ps.executeQuery();
while(rs.next()){
sql_1=rs.getString("meet_id");
}
conn.close();
return sql_1;
}catch(Exception e){
e.printStackTrace();
}
return sql_1;
}
Example 8
| Source File: AchievementDaoImpl.java From scada with MIT License | 5 votes |
|
public List<MyInformation> getAllinformation(){
Connection conn=null;
try{
conn=getConnection();
String sql="SELECT * FROM `scada`.`information`";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ResultSet rs=ps.executeQuery();
List<MyInformation> lr=new ArrayList<MyInformation>();
while(rs.next()){
MyInformation r=new MyInformation();
r.setId(rs.getInt("id"));
r.setInformation(rs.getString("text"));
lr.add(r);
r=null;
}
conn.close();
conn=null;
return lr;
}catch(Exception e)
{
e.printStackTrace();
}
return null;
}
Example 9
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 4 votes |
|
@Override
public void save() {
Connection conn=null;
try {
ActionContext actionContext = ActionContext.getContext();
Map<String, Object> session = actionContext.getSession();
String []file=new String[10];
/*****************************************************/
file[0]=(String) session.get("meet_id");
file[1]=(String) session.get("meet_name");
file[2]=(String) session.get("meet_title");
file[3]=(String) session.get("meet_content");
file[4]=(String) session.get("people_num");
file[5]=(String) session.get("start_end");
file[6]=(String) session.get("location");
file[7]=(String) session.get("meetroom_num");
file[8]=(String) session.get("useful_time");
file[9]=(String) session.get("room_size");
int meet_id=Integer.valueOf(file[0]);
int people_num=Integer.valueOf(file[4]);
int meetroom_num=Integer.valueOf(file[7]);
int room_size=Integer.valueOf(file[9]);
/*****************************************************/
conn=getConnection();
String sql=
"INSERT INTO `scada`.`meet_manager` (`meet_id`, `meet_name`, `meet_title`, `meet_content`, `people_num`, `start_end`, `location`, `meetroom_num`, `useful_time`, `room_size`) "
+ "VALUES ("+"'"+meet_id+"', '"+file[1]+"', '"+file[2]+"', '"+file[3]+"', '"+people_num+"', '"+file[5]+"', '"+file[6]+"', '"+meetroom_num+"', '"+file[8]+"', '"+room_size+"');";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
int row = ps.executeUpdate();
if(row > 0)
System.out.println("�ɹ������" + row + "������");
conn.close();
conn=null;
}catch(Exception e){
e.printStackTrace();
}
}
Example 10
| Source File: FileManagerDaoImpl.java From scada with MIT License | 4 votes |
|
@Override
public void save() {
try {
ActionContext actionContext = ActionContext.getContext();
Map<String, Object> session = actionContext.getSession();
int j = 1;
String []file=new String[20];
file[0]=(String) session.get("sname");
file[1]=(String) session.get("identity_card");
file[2]=(String) session.get("sex");
file[3]=(String) session.get("both");
file[4]=(String) session.get("age");
file[5]=(String) session.get("location");
file[6]=(String) session.get("zip_code");
file[7]=(String) session.get("nation");
file[8]=(String) session.get("politics_status");
file[9]=(String) session.get("school");
file[10]=(String) session.get("education_background");
file[11]=(String) session.get("major");
file[12]=(String) session.get("job_title");
file[13]=(String) session.get("job_title_date");
file[14]=(String) session.get("qualification");
file[15]=(String) session.get("telephone");
file[16]=(String) session.get("mobilephone");
file[17]=(String) session.get("urgent_phone");
file[18]=(String) session.get("company_email");
file[19]=(String) session.get("sole_email");
int age=Integer.valueOf(file[4]);
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/scada";
String username = "root";
String password = "root";
Connection conn = (Connection) DriverManager.getConnection(url , username , password);
if (conn != null)
System.out.println("���ݿ����ӳɹ�!");
else
System.out.println("���ݿ�����ʧ��!");
//��ɺ�ǵùر����ݿ�����
String sql_1="SELECT `sid` FROM `scada`.`file_manager`;";
PreparedStatement ps_1 = (PreparedStatement) conn.prepareStatement(sql_1);
ResultSet s_1=ps_1.executeQuery();
int sid;
while(s_1.next()){
sid =s_1.getInt(1);
System.out.println(sid);
if(sid==0)
{
System.out.println(sid);
}else
j=sid+1;
}
/*String sql_2="SELECT `identity_card` FROM `big_project`.`file_manager` WHERE identity_card="+"'"+file[1]+"';";
PreparedStatement ps_2 = (PreparedStatement) conn.prepareStatement(sql_2);
ResultSet s_2=ps_2.executeQuery();
System.out.println(6);
if(s_2==null){
System.out.println(7);*/
String sql=
"INSERT INTO `scada`.`file_manager` (`sid`, `sname`, `identity_card`, `sex`, `both`, `age`, `location`, `zip_code`, `nation`, `politics_status`, `school`, `education_background`, `major`, `job_title`, `job_title_date`, `qualification`, `telephone`, `mobilephone`, `urgent_phone`, `company_email`, `sole_email`) "
+ "VALUES ('"+j+"', "+"'"+file[0]+"', '"+file[1]+"', '"+file[2]+"', '"+file[3]+"', '"+age+"', '"+file[5]+"', '"+file[6]+"', '"+file[7]+"', '"+file[8]+"', '"+file[9]+"', '"+file[10]+"', '"+file[11]+"', '"+file[12]+"', '"+file[13]+"', '"+file[14]+"', '"+file[15]+"', '"+file[16]+"', '"+file[17]+"', '"+file[18]+"', '"+file[19]+"');";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
int row = ps.executeUpdate();
if(row > 0)
System.out.println("�ɹ������" + row + "������");
//}else{
conn.close();
conn=null;
//}
}catch(Exception e){
System.out.println(e);
}
}
Example 11
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 3 votes |
|
@Override
public void updateAndInput(int id){
Connection conn=null;
String sql=null;
try{
conn=getConnection();
sql="UPDATE `scada`.`meet_room` SET `useful`='������' WHERE `meetroom_id`="+"'"+id+"'";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ps.executeUpdate();
//MeetManager meetManager=(MeetManager)this.getSessionFactory().openSession().get(MeetManager.class, id);
//this.getHibernateTemplate().delete(meetManager);
//this.getSessionFactory().openSession().close();
conn.close();
conn=null;
}catch(Exception e){
System.out.println(e);
}
}
Example 12
| Source File: MeetManagerDaoImpl.java From scada with MIT License | 3 votes |
|
public String query(String id){
String sql=null;
String sql_2=null;
Connection conn=null;
try{
conn=getConnection();
sql="SELECT `meetroom_num` FROM scada.meet_manager WHERE meet_id="+id;
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
ResultSet rs=ps.executeQuery();
while(rs.next()){
sql_2=rs.getString("meetroom_num");
}
conn.close();
conn=null;
return sql_2;
}catch(Exception e){
System.out.println(e);
}
return sql_2;
}
Example 13
| Source File: AchievementDaoImpl.java From scada with MIT License | 2 votes |
|
@Override
public void save() {
ActionContext actionContext = ActionContext.getContext();
Map<String, Object> session = actionContext.getSession();
String infor=(String) session.get("information");
try{
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/scada";
String username = "root";
String password = "root";
Connection conn = (Connection) DriverManager.getConnection(url , username , password);
if (conn != null)
System.out.println("���ݿ����ӳɹ�!");
else
System.out.println("���ݿ�����ʧ��!");
String sql_1="SELECT `id` FROM `scada`.`information`;";
PreparedStatement ps_1 = (PreparedStatement) conn.prepareStatement(sql_1);
ResultSet s_1= ps_1.executeQuery();
int id=0;
while(s_1.next()){
id =s_1.getInt("id");
}
int id_1=id+1;
String sql_2="INSERT INTO `scada`.`information` (`id`,`text`) VALUES ('"+id_1+"','"+infor+"')";
PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql_2);
int row = ps.executeUpdate();
if(row > 0)
System.out.println("�ɹ������" + row + "������");
conn.close();
conn=null;
}catch(Exception e){
e.printStackTrace();
}
}
