1 import java.sql.Connection;
2 import java.sql.DriverManager;
3 import java.sql.PreparedStatement;
4 import java.sql.ResultSet;
5 import java.sql.SQLException;
6 import java.sql.Statement;
7 import java.sql.Timestamp;
8 import java.util.Scanner;
9
10 public class jdbcDemo {
11
12 static Scanner input=new Scanner(System.in); //静态的Scanner 方便给用输入
13 static String jdbc="jdbc:mysql://localhost:3306/t22?useUnicode=true&characterEncoding=utf-8";
14 static String Driver="com.mysql.jdbc.Driver";
15
16 public static void main(String[] args) {
17
18 myjdbc(); //调用执行jdbc增删改查
19 }
20 private static void myjdbc() {
21 System.out.println("-------------------进入jdbc增删改查----------------------");
22 System.out.println("请输入你要操作的序号");
23 System.out.println("-------注册/1---------");
24 System.out.println("-------登录/2---------");
25 System.out.println("-------退出/3---------");
26 int serial=input.nextInt(); //输入1进入注册 2 登录
27 switch (serial) {
28 case 1:
29 register(); //注册
30 break;
31 case 2:
32 logon(); //登录
33 break;
34 case 3:
35 System.out.println("欢迎下次再来");
36 System.exit(0); //退出
37 break;
38 default:
39 myjdbc(); //回到一级菜单
40 break;
41 }
42
43
44 }
45
46 //登录
47 private static void logon() {//方便关闭资源
48 Connection conn=null;
49 Statement stmt=null;
50 ResultSet rs = null;
51
52 try {
53 //加载驱动
54 Class.forName(Driver);
55 } catch (ClassNotFoundException e) {
56 // TODO Auto-generated catch block
57 e.printStackTrace();
58 }
59 try {
60 conn=DriverManager.getConnection(jdbc,"epetamin","1234");
61 stmt=conn.createStatement();
62 System.out.println("请输入登录名");
63 String Names=input.next();
64 System.out.println("请输入密码");
65 int pas=input.nextInt();
66 //要登录的数据
67 String sql="select *from "+Names+" where id="+pas+"";
68 rs=stmt.executeQuery(sql);
69 if(rs.next()){
70 System.out.println("登陆成功");
71 second();
72 }else{
73 System.out.println("登陆失败");
74 myjdbc();
75 }
76 } catch (SQLException e) {
77 // TODO Auto-generated catch block
78 e.printStackTrace();
79 }finally{ //关闭资源
80 if(rs!=null){
81 try {
82 rs.close();
83 } catch (SQLException e) {
84 // TODO Auto-generated catch block
85 e.printStackTrace();
86 }
87 }
88 if(stmt!=null){
89 try {
90 stmt.close();
91 } catch (SQLException e) {
92 // TODO Auto-generated catch block
93 e.printStackTrace();
94 }
95 }
96 if(conn!=null){
97 try {
98 conn.close();
99 } catch (SQLException e) {
100 // TODO Auto-generated catch block
101 e.printStackTrace();
102 }
103 }
104
105 }
106
107 }
108
109 //注册
110 private static void register() {
111 Connection conn=null;
112 Statement stmt=null;
113 try {
114 //加载驱动
115 Class.forName(Driver);
116 } catch (ClassNotFoundException e) {
117 // TODO Auto-generated catch block
118 e.printStackTrace();
119 }
120 try {
121
122 conn=DriverManager.getConnection(jdbc,"epetamin","1234");
123 stmt=conn.createStatement();
124 System.out.println("请输入姓名");
125 String name=input.next();
126 System.out.println("请输入健康值");
127 int sex=input.nextInt();
128 System.out.println("请输入亲密度");
129 int ban=input.nextInt();
130 System.out.println("请输入品种");
131 String phone=input.next();
132
133 //注册添加的信息
134 String sql="INSERT INTO dog(name,health,love,strain) VALUES(‘"+name+"‘,"+sex+","+ban+",‘"+phone+"‘);";
135 int ro=stmt.executeUpdate(sql);
136 if(ro>0){ //判断是否成功
137 System.out.println("注册成功");
138 myjdbc();
139 }else{
140 System.out.println("注册失败");
141 myjdbc();
142 }
143 } catch (SQLException e) {
144 // TODO Auto-generated catch block
145 e.printStackTrace();
146 }finally{ //关闭资源
147 if(conn!=null){
148 try {
149 conn.close();
150 } catch (SQLException e) {
151 // TODO Auto-generated catch block
152 e.printStackTrace();
153 }
154 }
155 if(stmt!=null){
156 try {
157 stmt.close();
158 } catch (SQLException e) {
159 // TODO Auto-generated catch block
160 e.printStackTrace();
161 }
162 }
163 }
164 }
165 //二级菜单
166 private static void second() {
167 System.out.println("----------进入了2级菜单----------");
168 System.out.println("-----------1:查询所有-----------");
169 System.out.println("-----------2:修改信息-----------");
170 System.out.println("-----------3:删除-----------");
171 System.out.println("-----------4:返回1级菜单-----------");
172 System.out.println("-----------（请您选择）-----------");
173 int select=input.nextInt();
174 switch (select) {
175 case 1: //查询所有
176 demand();
177 break;
178 case 2: //修改信息
179 Update();
180 break;
181 case 3: //删除
182 Drop();
183 break;
184 case 4: //返回1级菜单
185 myjdbc() ;
186 break;
187 default:
188 System.exit(0); //退出
189 break;
190 }
191 }
192
193 //删除
194 private static void Drop() {
195 Connection conn=null;
196 Statement stmt=null;
197 try {
198 Class.forName(Driver);
199 } catch (ClassNotFoundException e) {
200 // TODO Auto-generated catch block
201 e.printStackTrace();
202 }
203 try {
204 conn=DriverManager.getConnection(jdbc,"epetamin","1234");
205 stmt=conn.createStatement();
206 System.out.println("请输入要删除的编号");
207 int exe=input.nextInt();
208 String delete="DELETE FROM dog WHERE id="+exe+"";
209 int ro=stmt.executeUpdate(delete);
210 if(ro>0){
211 System.out.println("删除成功");
212 second();
213 }else{
214 System.out.println("删除失败");
215 second();
216 }
217 } catch (SQLException e) {
218 // TODO Auto-generated catch block
219 e.printStackTrace();
220 }finally{
221 if(conn!=null){
222 try {
223 conn.close();
224 } catch (SQLException e) {
225 // TODO Auto-generated catch block
226 e.printStackTrace();
227 }
228 }
229 if(stmt!=null){
230 try {
231 stmt.close();
232 } catch (SQLException e) {
233 // TODO Auto-generated catch block
234 e.printStackTrace();
235 }
236 }
237 }
238 }
239 //修改信息
240 private static void Update() {
241 Connection conn=null;
242 Statement stmt=null;
243 try {
244 Class.forName(Driver);
245 } catch (ClassNotFoundException e) {
246 // TODO Auto-generated catch block
247 e.printStackTrace();
248 }
249 try {
250 conn=DriverManager.getConnection(jdbc,"epetamin","1234");
251 stmt=conn.createStatement();
252 System.out.println("请输入要修改的编号");
253 int upd=input.nextInt();
254 System.out.println("请输入要修改的名称");
255 String names=input.next();
256 String upds="update dog set name=‘"+names+"‘ where id="+upd+"";
257 int ro=stmt.executeUpdate(upds);
258 if(ro>0){
259 System.out.println("修改成功");
260 second();
261 }else{
262 System.out.println("修改失败");
263 second();
264 }
265 } catch (SQLException e) {
266 // TODO Auto-generated catch block
267 e.printStackTrace();
268 }finally{
269 if(conn!=null){
270 try {
271 conn.close();
272 } catch (SQLException e) {
273 // TODO Auto-generated catch block
274 e.printStackTrace();
275 }
276 }
277 if(stmt!=null){
278 try {
279 stmt.close();
280 } catch (SQLException e) {
281 // TODO Auto-generated catch block
282 e.printStackTrace();
283 }
284 }
285 }
286 }
287 //查询所有
288 private static void demand() {
289 Connection conn=null;
290 Statement stmt=null;
291 ResultSet ro=null;
292
293
294 try {
295 Class.forName(Driver);
296 } catch (ClassNotFoundException e) {
297 // TODO Auto-generated catch block
298 e.printStackTrace();
299 }
300 try {
301 conn= DriverManager.getConnection(jdbc,"epetamin","1234");
302 stmt=conn.createStatement();
303 String dem="select * from dog";
304 ro=stmt.executeQuery(dem);
305 while (ro.next()) {
306 int studentNo = ro.getInt("id");
307 String studentName = ro.getString("name");
308 String loginPwd = ro.getString("strain");
309 // 获取日期
310 System.out.println("编号==》" + studentNo);
311 System.out.println("姓名==》" + studentName);
312 System.out.println("品种==》" + loginPwd);
313 }
314 }catch (SQLException e) {
315 // TODO Auto-generated catch block
316 e.printStackTrace();
317 }finally{
318 if(conn!=null){
319 try {
320 conn.close();
321 } catch (SQLException e) {
322 // TODO Auto-generated catch block
323 e.printStackTrace();
324 }
325 }
326 if(stmt!=null){
327 try {
328 stmt.close();
329 } catch (SQLException e) {
330 // TODO Auto-generated catch block
331 e.printStackTrace();
332 }
333 }
334 if(ro!=null){
335 try {
336 ro.close();
337 } catch (SQLException e) {
338 // TODO Auto-generated catch block
339 e.printStackTrace();
340 }
341 }
342 }
343 }
344 }
12:16:04
