【正文】 omponent(jLabel1)155. .addComponent(jTextField1, , , )156. .addComponent(jLabel2)157. .addComponent(jTextField2, , , ))158. .addGap(31, 31, 31)159. .addGroup(()160. .addComponent(jLabel3)161. .addComponent(jLabel4)162. .addComponent(jComboBox1, , , )163. .addComponent(jComboBox2, , , ))164. .addGap(37, 37, 37)165. .addGroup(()166. .addComponent(jLabel6)167. .addComponent(jTextField5, , , )168. .addComponent(jTextField6, , , )169. .addComponent(jLabel5))170. .addGap(43, 43, 43)171. .addGroup(()172. .addComponent(jButton1)173. .addComponent(jButton2)174. .addComponent(jButton3))175. .addContainerGap(150, ))176. )。177.178. pack()。179. }// /editorfold 180.181. private void jButton1ActionPerformed( evt) { 182. // TODO add your handling code here:183. String readid = ()。184. String name = ()。185. String type = ().toString()。186. String sex = ().toString()。187. // 如果讀者編號(hào)為空，則終止保存記錄操作188. if (()) {189. (null, 讀者編號(hào)不能為空！)。190. return。191. }192. // 如果讀者編號(hào)重復(fù)，則記錄無效，需修改讀者編號(hào)193. if (IfReaderIdExit(readid)) {194. (null, 讀者編號(hào)重復(fù)！)。195. return。196. }197. try {198. int max_num = (())。199. int days_num = (())。200. String sql = insert into reader(reader_id,readername,readertype,sex,201. + max_num,days_num) values(39。 + readid + 39。,39。 + name + 39。,39。202. + type + 39。,39。 + sex + 39。,39。 + max_num + 39。,39。 + days_num203. + 39。)。204. int i = (sql)。205. if (i == 1) {206. (null, 讀者添加成功！)。207. clearAllTextfield()。// 清空全部文本框208. }209. } catch (NumberFormatException e1) {210. (null, 最大可借數(shù)或211. + 最大可借天數(shù)錯(cuò)誤，應(yīng)為整數(shù)！)。212. }213. } 214.215. private void jButton2ActionPerformed( evt) { 216. // TODO add your handling code here:217. clearAllTextfield()。218. } 219.220. private void jButton3ActionPerformed( evt) { 221. // TODO add your handling code here:222. dispose()。223. } 224. private boolean IfReaderIdExit(String readid) {225. String sql = select * from reader where reader_id=39。 + readid + 39。226. ResultSet rs = (sql)。227. try {228. if (())229. return true。230. else231. return false。232. } catch (SQLException e) {233. (null, 無法正常讀取數(shù)據(jù)庫！)。234. }235. return false。236. }237. private void clearAllTextfield() {238. ()。239. ()。240. ()。241. ()。242. }243. /**244. * @param args the mand line arguments245. */246. public static void main(String args[]) {247. /* Set the Nimbus look and feel */248. //editorfold defaultstate=collapsed desc= Look and feel setting code (optional) 249. /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.250. * For details see 251. */252. try {253. for ( info : ()) {254. if (Nimbus.equals(())) {255. (())。256. break。257. }258. }259. } catch (ClassNotFoundException ex) {260. (()).log(, null, ex)。261. } catch (InstantiationException ex) {262. (()).log(, null, ex)。263. } catch (IllegalAccessException ex) {264. (()).log(, null, ex)。265. } catch ( ex) {266. (()).log(, null, ex)。267. }268. ///editorfold269.270. /* Create and display the form */271. (new Runnable() {272. public void run() {273. new ReaderAdd().setVisible(true)。274. }275. })。276. }277.278. // Variables declaration do not modify 279. private jButton1。280. private jButton2。281. private jButton3。282. private jComboBox1。283. private jComboBox2。284. private jLabel1。285. private jLabel2。286. private jLabel3。287. private jLabel4。288. private jLabel5。289. private jLabel6。290. private jTextField1。291. private jTextField2。292. private jTextField5。293. private jTextField6。// End of variables declaration } 刪除用戶package bookmana。/** * * @author jhf */import .*。import .*。import .*。import publicmodule.*。import 。public class ReaderDelete extends { /** * Creates new form ReaderDelete */ public ReaderDelete() { initComponents()。 (null)。 } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings(unchecked) // editorfold defaultstate=collapsed desc=Generated Code private void initComponents() {