通过本文主要向大家介绍了mysql数据库修改语句,mysql数据库修改数据,mysql数据库修改,mysql修改数据库名称,mysql数据库密码修改等相关知识,希望本文的分享对您有所帮助
import java.sql.*;
import java.text.DateFormat;
//数据库的查询
public class SelectTable {
String dbDriver="com.mysql.jdbc.Driver";
String dbUrl="jdbc:mysql://localhost:3306/sss";//根据实际情况变化
String username="root";
String password="123";
public Connection getConn()
{
Connection conn=null;
try
{
Class.forName(dbDriver);
}
catch (ClassNotFoundException e)
{
e.printStackTrace();
}
try
{
conn = DriverManager.getConnection(dbUrl,username,password);//注意是三个参数
}
catch (SQLException e)
{
e.printStackTrace();
}
return conn;
}
public void select(){
Connection conn = getConn();
try{
Statement stmt = conn.createStatement(); //创建Statement对象
System.out.println("成功连接到数据库！");
String sql = "select * from jdbc"; //要执行的SQL
ResultSet rs = stmt.executeQuery(sql);//创建数据对象
System.out.println("id"+"\t"+"name"+"\t"+"brithday");
while (rs.next()){
System.out.print(rs.getInt(1) + "\t");
System.out.print(rs.getString(2) + "\t");
System.out.print(rs.getDate(3) + "\t");
System.out.println();
}
}catch(Exception e){
e.printStackTrace();
}
}
public void insert(){
Connection conn = getConn();
try{
Statement stmt = conn.createStatement();
System.out.println("成功连接到数据库！");
String sql = "insert into jdbc (id,name,birthday) values(?,?,?)";
PreparedStatement pst =conn.prepareStatement(sql);
DateFormat df = DateFormat.getDateInstance();
java.util.Date dd = df.parse("2000-12-12");//将YYYY-MM-DD格式的时间转换为date
long t = dd.getTime();
java.sql.Date date = new java.sql.Date(t);
pst.setInt(1, 5);
pst.setString(2, "limazhi");
pst.setDate(3, date);
pst.executeUpdate();
select();
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String args[]){
SelectTable st = new SelectTable();
st.insert();
}
}
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