连结mysql
try
{
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
}
catch(Exception e1)
{
out.print("11111111111111111111"+e1.getMessage());
}
try
{
String url="jdbc:mysql://localhost/test";
java.sql.Connection cn=java.sql.DriverManager.getConnection(url,"root","wujun");
// Connection cn = DriverManager.getConnection("jdbc:mysql://localhost/test?user=root&password=wujun&useUnicode=true&characterEncoding=8859_1");
java.sql.Statement sm=cn.createStatement();
String strsql="select * from table1";
java.sql.ResultSet rs=sm.executeQuery(strsql);
while(rs.next())
{
out.print(rs.getInt(1)+":");
out.print(rs.getString(2));
out.print("********************<br>");
}
//rs.close();
sm.close();
cn.close();
}
catch(Exception ee)
{
out.print(ee.getMessage());
}#########################################################################
Properties 文件操作
java.util.Properties prp=new Properties();
java.io.FileInputStream ipt=new FileInputStream("c:/1.properties");
prp.load(ipt);
java.util.Enumeration en=prp.keys();
while(en.hasMoreElements())
{
out.print(en.nextElement());
//out.print(prp.get(en.nextElement()));
}
//prp.put("name","wujunjun");
//prp.put("name1","aaaaa");
// prp.put("name2","bbbbb");
// prp.put("name3","ccccc");
// prp.put("name4","dddddd");
// try
// {
// java.io.FileOutputStream fot=new FileOutputStream("c:/1.properties");
// prp.store(fot,"first in properties");
//}
// catch(Exception ee)
// {
// out.print(ee.getMessage());
// } #########################################################################
日志测试
package logtest.test;
import org.apache.log4j.*;
import java.io.*;
public class Test {
private Logger log=Logger.getLogger(this.getClass());
public Test() {
}
public void add()
{
try
{
int i=0;
File f=new File("c:\\a.txt");
java.io.FileReader fr=new FileReader(f);
fr.toString();
this.del();
}
catch(Exception ee){
log.fatal("fatal:"+ee);
log.error("error:"+ee);
log.warn("warn"+ee);
log.info("OK,error begin");
log.debug("debug:"+ee);
}
}
public void del()
{
new Exception("djkflsjkfsjdklfjsdlkflsdjkjk");
}
public static void main(String[] args) {
Test test = new Test();
test.add();
}
}
class目录下
log4j.properties
log4j.rootLogger=fatal,console,file
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=log.txt
log4j.appender.console.layout=org.apache.log4j.SimpleLayout
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%t %p - %m%n %C ########################################################################
集合hashTable
#####################################################################
package hashTable;
import java.util.*;
public class hashTable
{
public static void main(String args[])
{
try
{
java.util.Hashtable hs=new Hashtable();
for(int i=0;i<10;i++)
{
hs.put(i,i+"a");
}
Enumeration e2=hs.keys();
System.out.println("key:");
while(e2.hasMoreElements())
{
//System.out.print(e2.nextElement()+"value:");
System.out.println(hs.get(e2.nextElement()));
}
java.util.Enumeration ee=hs.elements();
System.out.println("value:");
while(ee.hasMoreElements())
{
System.out.println(ee.nextElement());
}
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}
}
#######################################################################
集合Vector
########################################################################
package vector;
import java.util.*;
public class MyVector extends Vector
{
public void addInt(int i)
{
addElement(new Integer(i));
}
public void addFloat(Float f)
{
addElement(new Float(f));
}
public void addString(String str)
{
addElement(str);
}
public void addCharArray(char a[])
{
addElement(a);
}
public void printVector()
{
Object o;
int lenght=size();
System.out.println("向量元素数为:"+lenght+";他们是:");
for(int i=0;0<lenght;i++)
{
o=elementAt(i);
if(o instanceof char[])
{
System.out.println(String.copyValueOf((char[])o));
}
else
{
System.out.println(o.toString());
}
}
}
public static void main(String args[])
{
MyVector v=new MyVector();
int digit=5;
float feal=3.14f;
char letters[]={'a','b','c','f','d'
};
String s=new String("挖,你在那里");
v.addInt(digit);
v.addFloat(feal);
v.addString(s);
v.addCharArray(letters);
v.printVector();
}
}
#######################################################################
转载请注名出处:http://www.blogjava.net/wujun
#######################################################################
VectorExcample
package vector;
import java.util.*;
public class VectorExcample
{
public static void main(String agrs[])
{
Vector v=new Vector(3,2);
System.out.println("大小"+v.size());
System.out.println("容量"+v.capacity());
v.addElement(new Integer(2));
v.addElement(new Integer(3));
v.addElement(new Integer(7));
v.addElement(new Integer(5));
System.out.println("当前容量:"+v.capacity());
v.addElement(new Double(10.04));
v.addElement(new Float(11.4));
System.out.println("当前容量:"+v.capacity());
if(v.contains(new Integer(2)))
{
System.out.println("向量包括2");
}
java.util.Enumeration ee=v.elements();
while(ee.hasMoreElements())
{
System.out.println(ee.nextElement()+"");
}
System.out.println();
}
}
StackExample
package vector;
import java.util.*;
public class StackExample
{
public static void main(String args[])
{
Stack s=new Stack();
System.out.println("大小:"+s.size());
System.out.println("容量:"+s.capacity());
s.push(new Integer(2));
s.push(new Integer(4));
s.push(new Integer(6));
s.push(new Integer(8));
System.out.println("当前容量:"+s.capacity());
s.push(new Double(10.04));
s.push(new Float(11.4));
System.out.println("当前容量"+s.capacity());
if(s.contains(new Integer(2)))
{
System.out.println("栈中包含2");
}
while(!s.empty())
{
System.out.println(s.pop());
}
}
}
JDBC执行sqlserver存储过程,带输出参数
package dbObject;
import java.sql.*;
public class linkDB
{
public static void main(String args[])
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=java.sql.DriverManager.getConnection("jdbc:odbc:blogdb","sa","");
java.sql.CallableStatement ca=con.prepareCall("{call gettongji(?,?,?,?)}");
ca.registerOutParameter(1,java.sql.Types.INTEGER);
ca.registerOutParameter(2,java.sql.Types.INTEGER);
ca.registerOutParameter(3,java.sql.Types.INTEGER);
ca.registerOutParameter(4,java.sql.Types.INTEGER);
ca.execute();
System.out.println(ca.getInt(1));
System.out.println(ca.getInt(2));
System.out.println(ca.getInt(3));
System.out.println(ca.getInt(4));
// java.sql.Statement stet=con.createStatement();
// String sql="insert into table1(address,age,sex) values('江西南昌',22,'男')";
/// stet.executeUpdate(sql);
// PreparedStatement pstet=con.prepareStatement("insert into table1 values(?,?,?)");
// pstet.addBatch();
// pstet.setString(1,"北京");
// pstet.setInt(2,80);
// pstet.setString(3,"女");
// pstet.executeUpdate();
// stet.close();
ca.close();
con.close();
}
catch(Exception ee)
{
System.out.println(ee.getMessage());
}
}
} ##################################################
今天就到这吧。。有空再整理。。
转载请注明:http://www.blogjava.net/wujun/