JDBC编程案例

1、把用户控制台输入的格式为"9999_zhangsan1_SALESMAN_7698_1981-02-20_2000_300_40"
  字符串里数据（数据和emp列顺序一致）分割出来存入数据库表emp中，
  如果添加成功则控制台打印“添加成功”,添加失败则打印"添加失败"
  （如主键重复，列数据长度超出等）。

package com.mysql.jdbc;

import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;
import java.sql.Connection;
public class Test1 {
public static void main(String[] args){
demo1();
}
private static void demo1() {
String sql=getInputsql();
Connection conn=null;
Statement stmt=null;
try{
Class.forName("com.mysql.jdbc.Driver");
conn= DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql-me","root","123456");
stmt=conn.createStatement();
int count= stmt.executeUpdate(sql);
System.out.println("添加了"+count+"条记录");
System.out.println("添加成功");
}catch (SQLException e) {
System.out.println("与数据库通信出问题");
e.printStackTrace();
} catch (ClassNotFoundException e) {
System.out.println("驱动类没有找到");
}finally{
if(stmt!=null){
try {
stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if(conn!=null){
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

}

private static String getInputsql() {
Scanner sc=new Scanner(System.in);
System.out.println("请输入emp人员信息数据格式-9999_zhangsan1_SALESMAN_7698_1981-02-20_2000_300_40");
String date=sc.next();
String[] dataArr=date.split("_");
StringBuilder sql=new StringBuilder("insert into emp values(");
sql.append(dataArr[0]);
sql.append(",'");
sql.append(dataArr[1]);
sql.append("',\"");
sql.append(dataArr[2]);
sql.append("\",");
sql.append(dataArr[3]);
sql.append(",'");
sql.append(dataArr[4]);
sql.append("',");
sql.append(dataArr[5]);
sql.append(",");
sql.append(dataArr[6]);
sql.append(",");
sql.append(dataArr[7]);
sql.append(")");
System.out.println(sql);
return sql.toString();
}
}