实训参考答案【实训内容】见第十章。
【参考答案】10.1 //////////////////////////////////////////////////////////public class Exer10_1{public static void main(String [] args){//System.out.print("Hello "); //第一次运行//System.out.print("Hello \n"); //第二次运行System.out.print("Hello\n李明"); //第二次运行也可以这样写//System.out.print("李明");}}10.2 //////////////////////////////////////////////////////////public class Exer10_2 {public static void main (String args[ ]) {char chinaWord='你', japanWord='ぁ';int p1=20328,p2=12358;System.out.println("汉字\'你\'字在unicode表中的顺序位置:"+(int)chinaWord);System.out.println("日语\'ぁ\'字在unicode表中的顺序位置:"+(int)japanWord);System.out.println("unicode表中第20328位置上的字符是:"+(char)p1);System.out.println("unicode表中第12358位置上的字符是:"+(char)p2);}}10.3(1) //////////////////////////////////////////////////////////public class Exer10_3_1{public static void main(String[] args){int val1=5;int val2=6;int result=0;char op='-';switch(op){case '+' :result=val1+val2;break;case '-' :result=val1-val2;break;case '*' :result=val1*val2;break;case '/' :result=val1/val2;break;case '%' :result=val1%val2;default :System.out.println("没有找到匹配的操作符");}System.out.println("计算结果为:"+val1+op+val2+"="+result);}}(2) //////////////////////////////////////////////////////////class Exer10_3_2{public static void main(String args[]) {int sum=0,i,j;for( i=1;i<=50;i++){ //计算1+3+5+7+9…if(i%2==0){continue;}sum=sum+i;}System.out.println("sum="+sum);for( j=2;j<=50;j++){ //求50以内的素数for( i=2;i<=j/2;i++){if(j%i==0){break;}}if(i>j/2){System.out.println(""+j+"是素数");}}}}10.4 /////////////////////////////////////public class Exer10_4 {public static void main(String args[]) {System.out.println(dengcha(3));System.out.println(dengcha(5));System.out.println(dengcha(10));}public static int dengcha(int n) {return 1+(n-1)*4;}}10.5 ///////////////////////////////class Computer {private String pc_name; //计算机品牌private String pc_color; //计算机颜色private String pc_type; //CPU型号private String pc_ram; //内存容量private String pc_harddisk; //硬盘容量private int pc_price; //价格private String pc_state; //工作状态public Computer() //默认构造函数，不带参数{ pc_name=""; //计算机品牌pc_color=""; //计算机颜色pc_type=""; //CPU型号pc_ram=""; //内存容量pc_harddisk=""; //硬盘容量pc_price=0; //价格pc_state=""; //计算机状态}public Computer(String aname,String acolor,String atype,String aram,String aharddisk,int aprice,String astate)//带参数的构造函数{ pc_name=aname; //计算机品牌初值pc_color=acolor; //计算机颜色初值pc_type=atype; //CPU型号初值pc_ram=aram; //内存容量初值pc_harddisk=aharddisk; //硬盘容量初值pc_price=aprice; //价格初值pc_state=astate; //计算机状态初值}void setcomputer(String aname,String acolor,String atype,String aram,String aharddisk,int aprice,String astate)//设置属性值的方法{ pc_name=aname; //计算机品牌pc_color=acolor; //计算机颜色pc_type=atype; //CPU型号pc_ram=aram; //内存容量pc_harddisk=aharddisk; //硬盘容量pc_price=aprice; //价格pc_state=astate; //计算机状态}void setstate(String astate) //设置状态属性的方法{ pc_state=astate;}void setram(String aram) //设置内存属性的方法{ pc_ram=aram;}public String pc_open() //定义计算机打开的方法{ setstate("打开");System.out.println(pc_name+"_工作状态："+pc_state);System.out.println(" * ");System.out.println(" * * * ");System.out.println("* * * * *");System.out.println("-------------------");return pc_state;}public String pc_close() //定义计算机关闭的方法{ setstate("关闭");System.out.println(pc_name+"_工作状态："+pc_state);System.out.println("请稍后，正在关闭计算机");System.out.println("-------------------");return pc_state;}public String pc_hitch() //定义计算机挂起的方法{ setstate("挂起");System.out.println(pc_name+"_工作状态："+pc_state);System.out.println("启动计算机请按Ctrl+Alt+Delete键");System.out.println("-------------------");return pc_state;}void printcomputer() //输出的方法{ if(pc_price>0)System.out.println("计算机品牌:"+pc_name+" 颜色:"+pc_color+" CPU型号:"+pc_type+" 内存容量:"+pc_ram+"\n硬盘容量:"+pc_harddisk+" 价格:"+pc_price+" 工作状态:"+pc_state);elseSystem.out.println("计算机品牌: 未知"+" 工作状态:"+pc_state);System.out.println("---------------------------------");}}class Mycomputer {public static void main(String[] args) {Computer stu1=new Computer(); //创建计算机类的对象stu1;//调用方法setcomputer设置计算机信息stu1.setcomputer("Dell","黑","PentiumⅣ","256k","20G",7096," 良好");stu1.printcomputer(); //输出计算机的信息Computer stu2=new Computer(); //创建计算机类的对象stu2;stu2.setcomputer("联想","黑","PentiumⅣ","512k","40G",7296," 良好");stu2.printcomputer(); //输出计算机的信息stu1.pc_open();stu2.pc_close();stu1.pc_hitch();stu2.setram("1024");stu1.printcomputer(); //输出计算机的信息stu2.printcomputer(); //输出计算机的信息Computer stu3=new Computer();stu3.setstate("打开");stu3.printcomputer(); //输出计算机的信息}}10.6 //////////////////////////////////package mypackage.factorial;class Factorial{private int n;public Factorial(int n){this.n=n;}private boolean testN(int n){if (n>=0){return true;}else{System.out.println("请输入非负数!");return false;}}public int Factorial(int n) {if (n==0) return 1;return n*Factorial(n-1);}public void print(){if (testN(n)) System.out.println(n+"!="+Factorial(n));}}////////////////////////////////////////////////////////////////////package mypackage.test;import mypackage.factorial.Factorial;class TestFactorial {public static void main(String [] args) {int n=Integer.parseInt(args[0]);Factorial f=new Factorial(n);f.print();}}10.7(1) //////////////////////////////////////////////////////////class Employee {int id;private String name;public void setId(int id) {this.id=id;}public void setName(String name) {=name;}}class Manager extends Employee{public void setId(byte id){this.id=id;}private int departmentID;public void setDepartmentID(int id) {departmentID=id;}}public class ExtendsExam1 {public static void main(String [] args) {Employee e=new Manager();}}(2) //////////////////////////////////////////////////////////class A{static int a=10;static int id=1;static String go(){return "20";}public static String fun(){return "20";}}class B extends A{}public class ExtendsExam2{public static void main(String [] args) {Employee e=new Manager();System.out.println("B.a="+B.a);System.out.println("B.id="+B.id);System.out.println("B.go()="+B.go());System.out.println("B.fun="+B.fun());}}(3) //////////////////////////////////////////////////////////class SuperClass {int x;SuperClass( ) {x=3;System.out.println("in SuperClass : x=" +x);}void doSomething( ){System.out.println(" in SuperClass.doSomething()");}}class SubClass extends SuperClass{int x;SubClass( ) {super( );x=5;System.out.println(" in SubClass :x=" +x);}void doSomething( ) {super.doSomething( );System.out.println(" in SubClass.doSomething()");System.out.println(" super.x="+super.x+" sub.x="+x);}}public class ExtendsExam3 {public static void main(String args[]) {SubClass sub=new SubClass();sub.doSomething();}}10.8(1) //////////////////////////////////////////////////////////class MethodOverload{void receive(int i) {System.out.println("excuted receive(int i)");}void receive(int x, int y) {System.out.println("excuted receive(int x, int y)");}void receive(double d) {System.out.println("excuted receive(double d)");}void receive(String s) {System.out.println("excuted receive(String s)");}}public class MethodOverloadExam1 {public static void main(String args[]) {MethodOverload mo=new MethodOverload();mo.receive(1);mo.receive(2,3);mo.receive(12.56);mo.receive("very interesting, isn’t it?");}}(2) //////////////////////////////////////////////////////////public class xEmployee { //一个构造函数使用另一个构造函数的某方面效果String name;int salary;public xEmployee(String s, int n) {name = s;salary = n;}public xEmployee(String s){this(s, 0);//……// this调用必须作为构造方法中第一个语句}public xEmployee(int n){this("Unknown", n);//……// this调用必须作为构造方法中第一个语句}public xEmployee(){this( "Unknown" );//……// this调用必须作为构造方法中第一个语句}public static void main(String [] args) {xEmployee s1=new xEmployee ("欧阳振国",5200);xEmployee s2=new xEmployee ("欧阳振国");xEmployee s3=new xEmployee (6000);xEmployee s4=new xEmployee ();System.out.println( +"---"+s1.salary);System.out.println( +"---"+s2.salary);System.out.println( +"---"+s3.salary);System.out.println( +"---"+s4.salary);}}(3) //////////////////////////////////////////////////////// 错误原因：SubClass中的fun() 无法覆盖SuperClass中的fun()，被覆盖的方法为final ////////////////////////////////////////////////////////////class SuperClass {int i=1;public final int fun() {return 1;}public void go() {System.out.println(fun());}}class SubClass extends SuperClass {int i=2;public int fun() {return 2;}}public class MethodOverrideExma{public static void main(String [] args) {SuperClass s=new SubClass();s.go();}}10.9(1) ///////////////////////////////////////////////interface A{}interface B{}interface C extends A{}interface D extends A,B,C{}(2) ///////////////////////////////////////////////interface V olume{double calculateV olume();}class Circle implements V olume{double r;public Circle(double r){this.r=r;}public double calculateV olume(){return 3.14*r*r*r;}}class Rectangle implements V olume{double l,w,h;public Rectangle(double l,double w,double h){this.l=l;this.w=w;this.h=h;}public double calculateV olume(){return l*w*h;}}class Test{public static void main (String [] args){Circle c=new Circle(2);System.out.println ("球的体积额为："+c.calculateV olume());Rectangle r=new Rectangle(1,2,3);System.out.println ("长方体的体积为："+r.calculateV olume());}}10.10 ///////////////////////////////////////////////class Employee{String name;int number;int age;int salary;public Employee(String name,int number,int age,int salary){ =name;this.number=number;this.age=age;this.salary=salary;}}class EmployeeTest{static Employee [] e=new Employee[5];public static int average(String type){int sum=0;for (int i=0;i<e.length;i++){if (type.equals("age")) sum=sum+e[i].age;if (type.equals("salary")) sum=sum+e[i].salary;}return sum/e.length;}public static int minimum(String type){int min=0;if (type.equals("age")){min=e[0].age;for (int i=1;i<e.length;i++){if (e[i].age<min) min=e[i].age;}}if (type.equals("salary")){min=e[0].salary;for (int i=1;i<e.length;i++){if (e[i].salary<min) min=e[i].salary;}}return min;}public static int maximum(String type){int max=0;if (type.equals("age")){max=e[0].age;for (int i=1;i<e.length;i++){if (e[i].age>max) max=e[i].age;}}if (type.equals("salary")){max=e[0].salary;for (int i=1;i<e.length;i++){if (e[i].salary>max) max=e[i].salary;}}return max;}public static void main(String [] args){e[0]=new Employee("张三",1,25,1500);e[1]=new Employee("李四",2,30,2800);e[2]=new Employee("王五",3,45,4500);e[3]=new Employee("刘六",4,28,2400);e[4]=new Employee("赵七",5,32,3000);if (args.length==2){if (args[0].equals("age")){ if(args[1].equals("min")) {System.out.println("最小年龄是"+minimum("age"));}else if(args[1].equals("max")) {System.out.println("最大年龄是"+maximum("age"));}else if(args[1].equals("avg")) {System.out.println("平均年龄是"+average("age"));}elseSystem.out.println("输入不正确，请正确输入!");}else if(args[0].equals("salary")){if(args[1].equals("min") ) {System.out.println("最低工资是"+minimum("salary"));}else if(args[1].equals("max")) {System.out.println("最高工资是"+maximum("salary"));}else if (args[1].equals("avg")) {System.out.println("平均工资是"+average("salary"));}elseSystem.out.println("输入不正确，请正确输入!");}else System.out.println("输入不正确，请正确输入!");}else System.out.println("输入不正确，请正确输入!");}}10.11（1）///////////////////////////////////////////////class Exer10_11_1{public static void main (String [] args){String s1=args[0];String s2=args[1];if(s1.equals(s2)){System.out.println ("s1==s2");}else if(pareTo(s2)>0){System.out.println ("s1>s2");}else{System.out.println ("s1<s2");}}}（2）///////////////////////////////////////////////class Exer10_11_2{public static void main (String [] args){StringBuffer s=new StringBuffer("Hello java!");System.out.println ("原始字符串："+s);s=s.replace(6,s.length(),"world!");System.out.println ("替换后："+s);s=s.insert(6,"new ");System.out.println ("插入后："+s);s=s.delete(6,10);System.out.println ("删除后："+s);s=s.append(" Hello java!");System.out.println ("追加后："+s);s=s.reverse();System.out.println ("翻转后："+s);}}10.12（1）///////////////////////////////////////////////class Exer10_12_1{public static void main (String [] args){try {String s=args[0];}//此处可能产生的异常类，应该为ArrayIndexOutOfBoundsExceptioncatch (NumberFormatException ex) {System.out.println ("格式转换错误！");}}}// 使用如下的方式之一，可以捕获并处理异常// catch (ArrayIndexOutOfBoundsException ex) {// System.out.println ("格式转换错误！");// }///////////////// catch (IndexOutOfBoundsException ex) {// System.out.println ("格式转换错误！");// }///////////////// catch (Exception ex) {// System.out.println ("格式转换错误！");// }//ng.Object// ng.Throwable// ng.Exception// ng.RuntimeException// ng.IndexOutOfBoundsException// ng.ArrayIndexOutOfBoundsException（2）//////////////////////////////////////////////////class Exer10_12_2{public static void main (String [] args){try {int i=Integer.parseInt(args[0]);}catch(IndexOutOfBoundsException ex){System.out.println ("请输入数据！");}catch (NumberFormatException ex) {System.out.println ("请输入整数！");}}}（3）//////////////////////////////////////////////////class Exer10_12_3{public static void main (String [] args){try {//System.exit(0); //在此处执行System.exit()方法，finally块无法执行String s=args[0];int i=Integer.parseInt(s);}catch(IndexOutOfBoundsException ex){System.out.println ("请输入数据！");System.exit(0);//如果出现IndexOutOfBoundsException异常，会执行System.exit()方法//则finally块无法执行//return;}catch (NumberFormatException ex) {System.out.println ("请输入整数！");return;//如果出现NumberFormatException异常，会执行finally块}finally {System.out.println ("执行finally块！");}}}（4）//////////////////////////////////////////////////class Exer10_12_4{public static void main (String [] args){try {String s=args[0];int i=Integer.parseInt(s);}catch(IndexOutOfBoundsException ex){System.out.println ("请输入数据！");}catch (NumberFormatException ex) {System.out.println ("请输入整数！");}catch(Exception ex){System.out.println ("产生其他异常！");}}}（5）//////////////////////////////////////////////////class Exer10_12_5{public static int getInt(String s) throws NumberFormatException{for(int i=0;i<s.length();i++){if(s.charAt(i)<'0' || s.charAt(i)>'9'){throw new NumberFormatException("请输入数值型数据！");}}int i=Integer.parseInt(s);return i;}public static void main (String [] args){try {String s=args[0];int i=getInt(s);}catch(IndexOutOfBoundsException ex){System.out.println ("请输入数据！");}catch (NumberFormatException ex) {System.out.println (ex.getMessage());}catch(Exception ex){System.out.println ("产生其他异常！");}}}10.13 //////////////////////////////////////////////////import java.io.*;import java.util.*;class Exer10_13{public static void main (String [] args){String dir;String cdate,size,name;int filecount=0,dircount=0;long allsize=0,longsize=0;try{dir=args[0]; //dir是已定义的String对象}catch(ArrayIndexOutOfBoundsException e){dir="./"; //考虑没有参数传入时，dir的值是当前目录}File f=new File(dir);if(!f.exists()){System.out.println("文件或目录不存在！");System.exit(0);}if(f.isFile()){long l=stModified();Date date=new Date(l);cdate=date.toLocaleString();long len =f.length();allsize+=len;name=f.getName();filecount++;System.out.println (cdate+" "+len+" "+name);}else{File [] list=f.listFiles();for(int i=0;i<list.length;i++){if(list[i].isDirectory()){long l=list[i].lastModified();Date date=new Date(l);cdate=date.toLocaleString();name=list[i].getName();dircount++;System.out.println (cdate+"\t<DIR>\t\t\t\t"+name);}else{long l=list[i].lastModified();Date date=new Date(l);cdate=date.toLocaleString();long len =list[i].length();allsize+=len;name=list[i].getName();filecount++;System.out.println (cdate+"\t\t\t"+len+"\t\t"+name);}}}longsize=allsize/1024;System.out.println ("\n"+filecount+"个文件"+longsize+"个字节");System.out.println (dircount+"个文件夹");}}10.14 //////////////////////////////////////////////////import java.io.*;class Exer10_14{static FileInputStream fis;static FileOutputStream fos;public static void main (String [] args){String source=args[0];String dest=args[1];int size=0,i=0;try {fis=new FileInputStream(source);fos=new FileOutputStream(dest);byte[] b=new byte[255];while((i=fis.read(b))!=-1){System.out.println (new String (b,0,i));size+=i;fos.write(b);}fis.close();fos.close();System.out.println ("复制文件完毕！共"+size+"字节！");}catch (Exception ex) {ex.printStackTrace();}finally { }}}10.15 //////////////////////////////////////////////////import java.io.*;class Exer10_15{public static void main (String [] args){try {int n=Integer.parseInt(args[0]);RandomAccessFile ra=new RandomAccessFile("student.dat","r");if(n*19>ra.length()) {System.out.println("记录号超出范围！");return;}ra.seek((n-1)*19);String sno=Integer.toString(ra.readInt());String name=ra.readUTF();int age=ra.readInt();char grade=ra.readChar();boolean sex=ra.readBoolean();System.out.println (sno+"\t"+name+"\t"+age+"\t"+grade+"\t"+sex);ra.close();} catch (Exception ex) {System.out.println ("产生错误！");System.out.println (ex.getMessage());}finally { }}}10.16 //////////////////////////////////////////////////（1）//////////////////////////////////////////////////import java.awt.*;import javax.swing.*;public class Exer10_16_1 extends JFrame{JButton [] button;public Exer10_16_1(){button =new JButton[5];for(int i=0;i<button.length;i++){button[i]=new JButton("Button"+i);this.getContentPane().add(button[i]);}this.getContentPane().setLayout(new FlowLayout(FlowLayout.LEFT));//this.getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER));//this.getContentPane().setLayout(new FlowLayout(FlowLayout.RIGHT));this.setSize(200,100);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setV isible(true);}public static void main(String [] args){new Exer10_16_1();}}（2）//////////////////////////////////////////////////import java.awt.*;import javax.swing.*;public class Exer10_16_2 extends JFrame{JButton [] button;public Exer10_16_2(){button =new JButton[5];for(int i=0;i<button.length;i++){button[i]=new JButton("Button"+i);}this.getContentPane().setLayout(new BorderLayout());this.getContentPane().add(button[0],BorderLayout.NORTH);this.getContentPane().add(button[1],BorderLayout.WEST);this.getContentPane().add(button[2],BorderLayout.CENTER);this.getContentPane().add(button[3],BorderLayout.SOUTH);this.getContentPane().add(button[4],BorderLayout.EAST);this.setSize(200,100);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setV isible(true);}public static void main(String [] args){new Exer10_16_2();}}（3）//////////////////////////////////////////////////import java.awt.*;import javax.swing.*;public class Exer10_16_3 extends JFrame{JButton [] button;public Exer10_16_3(){button =new JButton[13];this.getContentPane().setLayout(new GridLayout(4,4));// this.getContentPane().setLayout(new GridLayout(3,5));// this.getContentPane().setLayout(new GridLayout(5,3));// this.getContentPane().setLayout(new GridLayout(13,0));// this.getContentPane().setLayout(new GridLayout(0,13));for(int i=0;i<button.length;i++){button[i]=new JButton("Button"+i);this.getContentPane().add(button[i]);}this.setSize(400,200);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setV isible(true);}public static void main(String [] args){new Exer10_16_3();}}10.17（1）//////////////////////////////////////////////////import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Exer10_17_1 extends JFrame{JTextArea text=new JTextArea(15,20);JTextField tx=new JTextField(10);JButton button=new JButton("发送");public Exer10_17_1(){this.getContentPane().setLayout(new FlowLayout());this.getContentPane().add(text);this.getContentPane().add(tx);this.getContentPane().add(button);tx.addKeyListener(new KeyAdapter(){public void keyPressed(KeyEvent e){if(e.getKeyCode()==KeyEvent.VK_ENTER){send();}}});button.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){send();}});this.setSize(300,400);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setV isible(true);}private void send(){text.append(tx.getText()+"\n");}public static void main (String [] args){new Exer10_17_1();}}（2）//////////////////////////////////////////////////import javax.swing.*;import java.awt.*;public class Exer10_17_2 extends JFrame{Exer10_17_2(){this.setSize(300,350);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setV isible(true);}public void paint(Graphics g){int x,y,i;g.drawLine(10,40,300,40); //从(10，40)开始到(300，40)画一条黑色直线g.setColor(Color.red);g.drawRect(10,50,50,30); //在(10，50)到(50，30)处画一个红色的矩形框g.drawOval(100,50,40,40); //在(100,50)处画一个半径为40的红色的圆形g.setColor(Color.blue);g.fillOval(170,50,90,40); //在(170,50)处画一个宽为90，高为40的蓝色的实心椭圆g.setColor(Color.pink); //绘制字符串Font fo=new Font("楷体_GB2312",Font.ITALIC|Font.BOLD,32);g.setFont(fo);g.drawString("我们都很快乐！",10,130);Image im=null; //显示图片im=getToolkit().getImage("b.jpg");g.drawImage(im,10,170,200,160,this);}public static void main(String args[]){new Exer10_17_2();}}（3）//////////////////////////////////////////////////import javax.swing.*;import java.awt.*;import java.awt.event.*;public class Exer10_17_3 extends JFrame implements ActionListener{ // 类EventExample实现ActionListener接口，成为事件监听器JPanel p;JPanel p1;JTextField number;JTextField name;JTextField age;JTextArea summary;JButton ok;JButton cancel;public Exer10_17_3 (){super("ActionEvent事件演示示例");p=new JPanel();p1=new JPanel();number=new JTextField (5);name=new JTextField (18);age=new JTextField ("20");summary=new JTextArea("请在此输入个人简介!",4,20);ok=new JButton("确定");ok.addActionListener(this); //注册，添加监听器cancel=new JButton("取消");cancel.addActionListener(this); //注册，添加监听器p.add(new Label("学号:"));p.add(number);p.add(new Label("姓名:"));p.add(name);p.add(new Label("年龄:"));p.add(age);p.add(new Label("个人简介:"));p1.add(ok);p1.add(cancel);this.getContentPane().add(p,BorderLayout.NORTH);this.getContentPane().add(summary);this.getContentPane().add(p1,BorderLayout.SOUTH);this.setSize(600,300);this.setV isible(true);}public void actionPerformed(ActionEvent e){ //重写接口中的全部方法if ((JButton)e.getSource()==ok){ //判断是否为ok按钮发生的事件summary.setText("你输入的学号是："+number.getText()+" 姓名是："+name.getText()+" 年龄是："+age.getText());}else{number.setText("");name.setText("");age.setText("");summary.setText("");}}public static void main(String [] args){new Exer10_17_3 ();}}10.18 ///////////////////////////////////////////////////*操作数据库程序DataBaseOperator.java*/import java.sql.*;class DataBaseOperator{static Connection stucn;static Statement stust;static ResultSet sturs;public static boolean ConnDB(String DSName,String UserName,String Password){ //连接数据库boolean ConnOk=false;try {Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");System.out.println ("数据库驱动程序加载成功......");stucn=DriverManager.getConnection("jdbc:odbc:"+DSName,UserName,Password);ConnOk=true;System.out.println ("数据库连接成功......");}catch (Exception ex) {System.out.println ("数据库连接失败......");}return ConnOk;}public static boolean searchTable(String SQLString){ //查询数据。
