java作业-通讯录，无数据库，写入数据时出现乱码
[code]import java.util.*;
import java.io.*;
import java.lang.*;
/**
*
* @author Administrator
*/
public class Person implements Serializable{
private String name;
private int age;
private long phone;
private long id;
Person(String name,int age,long phone,long id){
this.name=name;
this.age=age;
this.phone=phone;
this.id=id;
}
public String getName(){
return name;
}
public void setName(String name){
this.name=name;
}
public int getAge(){
return age;
}
public void setAge(int age){
this.age=age;
}
public long getPhone(){
return phone;
}
public void setName(long phone){
this.phone=phone;
}
public long getId(){
return id;
}
public void setId(long id){
this.id=id;
}
public static void main(String[] args) {
Map map = new HashMap();
exit:
try{
FileOutputStream fos=new FileOutputStream("C:\\Person.txt");
ObjectOutputStream obs=new ObjectOutputStream(fos);
obs.writeObject(map);
for(;;)
{
System.out.println("1、保存 2、查询3、删除 4、修改 5、退出");
Scanner scanner1 = new Scanner(System.in);//扫描器，接受控制台的输入信息
String str=scanner1.nextLine();//取出控制台的一行信息,也就是你输入的信息
char[] choose=str.toCharArray();//把取道的字符串变成一个char数组
FileInputStream fis=new FileInputStream("C:\\Person.txt");
ObjectInputStream ois=new ObjectInputStream(fis);
ois.readObject();
if(choose.length>1)
{
System.out.println("只能输入1-5的数字");
}else {
switch (choose[0]) {
case '1':
FileInputStream fix=new FileInputStream("C:\\Person.txt");
ObjectInputStream oix=new ObjectInputStream(fix);
map=(HashMap)oix.readObject();
System.out.print("请输入学号：");
Scanner scanner2 = new Scanner(System.in);
String id = scanner2.nextLine();
System.out.print("请输入姓名：");
Scanner scanner3 = new Scanner(System.in);
String name = scanner3.nextLine();
System.out.print("请输入电话号码：");
Scanner scanner4 = new Scanner(System.in);
String phone = scanner4.nextLine();
System.out.print("请输入年龄：");
Scanner scanner5 = new Scanner(System.in);
String age= scanner5.nextLine();
map.put(id,map);
System.out.println("保存成功");
break;
case '2':
FileInputStream fib=new FileInputStream("C:\\Person.txt");
ObjectInputStream oib=new ObjectInputStream(fib);
oib.readObject();
if(map.size()==0)
{
System.out.println("通讯录为空，请先添加");
}else {
Iterator it = map.keySet().iterator();//map.keySet()返回一个对象实例，调用iterator()方法，返回Iterator类型赋给it。实现遍历输出
while(it.hasNext()){
String key = (String) it.next();
String value = (String) map.get(key);
System.out.println(key+" "+value);
}
}
break;
case '3':
FileInputStream fid=new FileInputStream("C:\\Person.txt");
ObjectInputStream oid=new ObjectInputStream(fid);
oid.readObject();
System.out.print("请输入要删除的名字：");
Scanner scanner6 = new Scanner(System.in);
String deletName = scanner6.nextLine();
Iterator it = map.keySet().iterator();
while(it.hasNext()){
String key = (String) it.next();
if(deletName.equals(key))
{
map.remove(key);
System.out.println("删除成功");
}
}
break;
case '4':
// map.remove()
FileInputStream fif=new FileInputStream("C:\\Person.txt");
ObjectInputStream oif=new ObjectInputStream(fif);
oif.readObject();
System.out.print("请输入你要修改的通讯人的名字：");
Scanner scanner7 = new Scanner(System.in);
String updateName = scanner7.nextLine();
Iterator it1 = map.keySet().iterator();
while(it1.hasNext()){
String key = (String) it1.next();
if(updateName.equals(key))
{
map.remove(key);
}
}
System.out.print("请输入修改后的通讯人的名字：");
Scanner scanner8 = new Scanner(System.in);
String name1 = scanner8.nextLine();
System.out.print("请输入修改后的通讯人的学号：");
Scanner scanner9 = new Scanner(System.in);
String id1 = scanner9.nextLine();
System.out.print("请输入修改后的通讯人的电话号码：");
Scanner scanner10 = new Scanner(System.in);
String phone1 = scanner10.nextLine();
System.out.print("请输入修改后的通讯人的年龄：");
Scanner scanner11 = new Scanner(System.in);
String age1 = scanner11.nextLine();
map.put(id1,map);
System.out.println("保存成功");
break;
case '5':
break exit;
default:
break;
}
}
}
}catch(Exception e){
e.printStackTrace();
}
}
}
请各位指教，将.txt文件改为其它编码方式也是一样出现乱码
[解决办法]
需要指定编码格式！
UTF-8 OR GBK OR GB2312
[解决办法]
在ＪＡＶＡ中读取文件乱码的解决办法
public static String encodin = "UTF8"
public static String encodout = "UTF8"
static void writeOutput(String str) {
try {
FileOutputStream fos = new FileOutputStream("test.txt");
Writer out = new OutputStreamWriter(fos, encodout);
out.write(str);
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
static String readInput() {
StringBuffer buffer = new StringBuffer();
try {
FileInputStream fis = new FileInputStream("test.txt");
InputStreamReader isr = new InputStreamReader(fis, encodin);
Reader in = new BufferedReader(isr);
int ch;
while ((ch = in.read()) > -1) {
buffer.append((char)ch);
}
in.close();
return buffer.toString();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
------解决方案--------------------
- Java code
import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;public class TestObjectIO { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub try { FileOutputStream fos = new FileOutputStream("F:\\test.txt",true); ObjectOutputStream oos = new ObjectOutputStream(fos); oos.writeObject(new Test(12,"aaa")); oos.writeObject(new Test(13,"maijunjin")); FileInputStream fis = new FileInputStream("F:\\test.txt"); ObjectInputStream ois = new ObjectInputStream(fis); while(ois.readObject() !=null) // System.out.println(ois.available()); System.out.println((Test)ois.readObject()); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ } }}class Test implements Serializable{ private int testID; private String testName; public Test(int testID, String testName) { super(); this.testID = testID; this.testName = testName; } @Override public String toString() { // TODO Auto-generated method stub return "testID:" + testID + " " + "testName:" + testName; } public int getTestID() { return testID; } public void setTestID(int testID) { this.testID = testID; } public String getTestName() { return testName; } public void setTestName(String testName) { this.testName = testName; } }