Java queries sqlserver database code

admin · Posted on 11/18/2014 1:01:22 PM

[mw_shl_code=java,true]import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class test2 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Get a connection object
conn=DriverManager.getConnection(
"jdbc:sqlserver://localhost:1433; database=sqlDB; ", "sa", "123");
sql statement
String sql="select * from userinfo";
Create an object to execute the command
stmt=conn.createStatement();
Execute SQL statements
rs=stmt.executeQuery(sql);
while(rs.next()){
int id=rs.getInt("id");
String name=rs.getString("qname");
int age=rs.getInt("age");
System.out.println("ID:"+id+",Name:"+name+",Age:"+age);
}

} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
try {
if(rs!=null){rs.close(); }
if(stmt!=null){stmt.close(); }
if(conn!=null){conn.close(); }
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

}
[/mw_shl_code]

Database script:

[mw_shl_code=sql,true]create database sqlDB
go
use sqlDB
go

create table userinfo(
id int primary key,
qname varchar(10),
age int
)
go

select * from userinfo[/mw_shl_code]

Java jdbc package:

sqljdbc.jar (300.98 KB, Number of downloads: 0, Selling price: 1 Grain MB)

Delver_Si · Posted on 11/18/2014 3:52:41 PM

If there is a bug in closing a resource, the closing result set is abnormal, and closing objects and connections will not be executed.

Delver_Si · Posted on 11/18/2014 3:52:47 PM

If there is a bug in closing a resource, the closing result set is abnormal, and closing objects and connections will not be executed.

admin · Posted on 11/18/2014 6:40:12 PM

Delver_Si Posted on 2014-11-18 15:52
If there is a bug in closing a resource, the closing result set is abnormal, and closing objects and connections will not be executed.

How should that be solved?

Delver_Si · Posted on 11/18/2014 6:46:08 PM

admin posted on 2014-11-18 18:40
How should that be solved?

Try catch every close

admin · Posted on 11/18/2014 6:54:19 PM

Delver_Si Posted on 2014-11-18 18:46
Try catch every close

Speechless, this is what He Ke taught us to write

[Communication] Java queries sqlserver database code

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