點(diǎn)擊電腦的開始。
創(chuàng)新互聯(lián)是一家集網(wǎng)站建設(shè),金秀企業(yè)網(wǎng)站建設(shè),金秀品牌網(wǎng)站建設(shè),網(wǎng)站定制,金秀網(wǎng)站建設(shè)報(bào)價(jià),網(wǎng)絡(luò)營(yíng)銷,網(wǎng)絡(luò)優(yōu)化,金秀網(wǎng)站推廣為一體的創(chuàng)新建站企業(yè),幫助傳統(tǒng)企業(yè)提升企業(yè)形象加強(qiáng)企業(yè)競(jìng)爭(zhēng)力。可充分滿足這一群體相比中小企業(yè)更為豐富、高端、多元的互聯(lián)網(wǎng)需求。同時(shí)我們時(shí)刻保持專業(yè)、時(shí)尚、前沿,時(shí)刻以成就客戶成長(zhǎng)自我,堅(jiān)持不斷學(xué)習(xí)、思考、沉淀、凈化自己,讓我們?yōu)楦嗟钠髽I(yè)打造出實(shí)用型網(wǎng)站。
首先點(diǎn)擊電腦的開始,找到QLServer配置管理器,將SQLServer網(wǎng)絡(luò)配置中的SQLEXPRESS的協(xié)議如下圖中的三個(gè)服務(wù)改為啟用,然后點(diǎn)擊TCPIP協(xié)議,修改動(dòng)態(tài)端口為1433,重啟服務(wù)器才能生效,首先建立一個(gè)java項(xiàng)目,命名為TestDB然后右鍵點(diǎn)擊TestDB選擇buildpath然后找到AddExternalJARs,找到下載的sqljdbc的包,打開即可,然后項(xiàng)目的referencedlibraries目錄下能看到導(dǎo)入的包,新建一個(gè)包database包中再建立TestConect執(zhí)行以下代碼,代碼執(zhí)行結(jié)果和數(shù)據(jù)庫(kù)中查詢的結(jié)果一樣。
對(duì)數(shù)據(jù)庫(kù)進(jìn)行增刪改查?
以下是 sql server 2013+java.實(shí)現(xiàn)的是對(duì)MSC對(duì)象的增刪改查.
需要下載連接驅(qū)動(dòng)程序:com.microsoft.sqlserver.jdbc.SQLServerDriver
網(wǎng)上搜一下就行
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
class MSC
{
public String MscID;
public String MscName;
public String MscCompany;
public float MscLongitude;
public float MscLatitude;
public float MscAltitude;
public MSC(String MscID, String MscName, String MscCompany,
float MscLongitude, float MscLatitude,float MscAltitude){
this.MscID = MscID;
this.MscName = MscName;
this.MscCompany = MscCompany;
this.MscLongitude =MscLongitude;
this.MscLatitude = MscLatitude;
this.MscAltitude = MscAltitude;
}
}
public class sqlserverjdbc {
public Connection getConnection(){
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; //加載JDBC驅(qū)動(dòng)
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=gsm"; //連接服務(wù)器和數(shù)據(jù)庫(kù)sample
String userName = "sa"; //默認(rèn)用戶名
String userPwd = "123"; //密碼
Connection dbConn = null;
try {
Class.forName(driverName);
dbConn =DriverManager.getConnection(dbURL, userName, userPwd);
} catch (Exception e) {
e.printStackTrace();
}
return dbConn;
}
public void printUserInfo(){
Connection con = getConnection();
Statement sta = null;
ResultSet rs = null;
System.out.println("打印表格MSC信息");
try {
sta = con.createStatement();
rs = sta.executeQuery("select * from MSC信息");
System.out.println("MscID\tMscName\tMscCompany\tMscLongitude\tMscLatitude\tMscAltitude");
while(rs.next()){
System.out.println(rs.getString("MscID")+"\t"+
rs.getString("MscName")+"\t"+
rs.getString("MscCompany")+"\t"+
rs.getFloat("MscLongitude")+"\t"+
rs.getFloat("MscLatitude")+"\t"+
rs.getFloat("MscAltitude"));
}
con.close();
sta.close();
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("打印完成\n");
}
public void delete(String MscID){
Connection con = getConnection();
String sql = "delete from MSC信息 where MscID = " + MscID;
PreparedStatement pst;
System.out.println("刪除表格MSC信息中 ID = "+MscID+"的記錄");
try {
pst = con.prepareStatement(sql);
pst.execute();
pst.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("記錄刪除失?。。?!");
}
System.out.println("記錄刪除成功?。?!\n");
}
public void insert(MSC msc){
Connection con = getConnection();
String sql = "insert into MSC信息 values(?,?,?,?,?,?)";
PreparedStatement pst;
System.out.println("插入一條記錄");
try {
pst = con.prepareStatement(sql);
pst.setString(1, msc.MscID);
pst.setString(2, msc.MscName);
pst.setString(3, msc.MscCompany);
pst.setFloat(4, msc.MscLongitude);
pst.setFloat(5, msc.MscLatitude);
pst.setFloat(6, msc.MscAltitude);
pst.execute();
pst.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("插入失?。。。?);
}
System.out.println("插入成功?。?!\n");
}
//更新MscID的MscName
public void updateMscName(String MscID, String MscName){
Connection con = getConnection();
String sql = "update MSC信息 set MscName = ? where MscID = ?";
PreparedStatement pst;
System.out.println("修改一條記錄");
try {
pst = con.prepareStatement(sql);
pst.setString(1, MscName);
pst.setString(2, MscID);
pst.execute();
pst.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("修改失敗?。?!");
}
System.out.println("修改成功?。?!\n");
}
public static void main(String args[]){
sqlserverjdbc sql = new sqlserverjdbc();
sql.printUserInfo();
sql.delete("1111");
sql.printUserInfo();
sql.updateMscName("5215", "聯(lián)想");
sql.printUserInfo();
sql.insert(new MSC("1111", "中興" ," 中興", (float)12.2, (float)3.4,(float)45.5));
sql.printUserInfo();
}
}
只寫個(gè)demo級(jí)的例程很好寫,但用到生產(chǎn)環(huán)境中還得具體分析設(shè)計(jì)再編碼。這種代碼網(wǎng)上太多了內(nèi),你隨便搜下就有了。
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class AccountDemo {
public static double MONEY = 0;// 初始化金額是100元。
public static void main(String[] args) {
final String USER_NAME = "zhangsan";// 用戶名
final String PASSWORD = "123456";// 密碼
while (true) {
System.out.print("請(qǐng)輸入用戶名:");
String user_name = getString();
System.out.print("請(qǐng)輸入密碼:");
String password = getString();
if (user_name != null user_name.equals(USER_NAME)
password != null password.equals(PASSWORD)) {
System.out.println("登陸成功!你要干什么?");
while (true) {
System.out.println("1:存款");
System.out.println("2:取款");
System.out.println("3:查詢余額");
System.out.println("q:退出程序");
System.out.print("請(qǐng)選擇:");
String userIn = getString();
int in = 0;
if (userIn != null userIn.equals("1")) {
in = Integer.parseInt(userIn);
} else if (userIn != null userIn.equals("2")) {
in = Integer.parseInt(userIn);
} else if (userIn != null userIn.equals("3")) {
in = Integer.parseInt(userIn);
} else if (userIn != null
userIn.trim().toUpperCase().equals("Q")) {
in = 4;
} else {
System.out.println("你輸入的指令不正確!請(qǐng)重新輸入。");
continue;
}
switch (in) {
case 1:
double add_money = 0;
while (true) {
System.out.print("請(qǐng)輸入你要存入的金額:");
try {
add_money = Double.parseDouble(getString());
} catch (Exception e) {
System.out.println("金額輸入不正確!");
continue;
}
break;
}
MONEY += add_money;
System.out.println("存入的金額是" + add_money
+ "\r\n請(qǐng)選擇你要的操作:");
break;
case 2:
double money = 0;
while (true) {
System.out.print("請(qǐng)輸入你要取出的金額:");
try {
money = Double.parseDouble(getString());
} catch (Exception e) {
System.out.println("金額輸入不正確!");
continue;
}
if (money MONEY) {
System.out.println("取出的金額大于現(xiàn)有存款,請(qǐng)重新輸入要取出的金額!");
continue;
}
break;
}
MONEY -= money;
System.out.println("取出的金額是" + money + "\r\n請(qǐng)選擇你要的操作:");
break;
case 3:
System.out.println("你的余額是:" + MONEY + "\r\n請(qǐng)選擇你要的操作:");
break;
case 4:
System.out.println("程序退出!");
return;
}
}
} else {
System.out.println("錯(cuò)誤:用戶名與密碼不匹配!\r\n");
System.out.println("按任意鍵:重新輸入用戶名和密碼。");
System.out.println("q:退出程序。");
System.out.print("請(qǐng)選擇:");
String in = getString();
if (in.trim().toUpperCase().equals("Q")) {
break;
}
}
}
}
public static String getString() {
String str = null;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
str = br.readLine();
} catch (IOException e) {
e.printStackTrace();
}
return str;
}
}
是說數(shù)據(jù)庫(kù)中的表嗎?
什么數(shù)據(jù)庫(kù)?
你學(xué)JDBC了嗎?
沒有學(xué)的話,看看這里連接ORACLE數(shù)據(jù)庫(kù)的方式