Java 如何将此主方法更改为按顺序读取文件

如何按顺序读取文件

public static void main(String[] args){
    String fichier ="E:\\fichiers\\test.txt";

    int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};
    String tabS[] = new String[14];


    for(int i=0; i<tab.length; i++){

        char cbuf[] = new char[tab[i]];

        try {

            InputStream       ips  = new FileInputStream(fichier); 
            InputStreamReader ipsr = new InputStreamReader(ips);
            BufferedReader    br   = new BufferedReader(ipsr);

            br.read(cbuf, 0, tab[i]);

            tabS[i] = new String(cbuf);
            System.out.println(tabS[i]);

        } catch (Exception e){
            System.out.println(e.toString());
        }
    }
}

当我运行readMe方法时，我得到以下结果：

这里的问题是，每次他开始读取文件时，它都会开始定位0

---

有什么帮助吗？

在我看来，在创建流之后，您只需要在try/catch中移动for循环

public static void main(String[] args){
    String fichier ="E:\\fichiers\\test.txt";

    int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};
    String tabS[] = new String[14];

    try {

        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

        for(int i=0; i<tab.length; i++){

            char cbuf[] = new char[tab[i]];

            br.read(cbuf, 0, tab[i]);

            tabS[i] = new String(cbuf);
            System.out.println(tabS[i]);
        }

    } catch (Exception e){
        System.out.println(e.toString());
    }
}

publicstaticvoidmain（字符串[]args）{
字符串fichier=“E:\\fichiers\\test.txt”；
int tab[]={2,2,20,8,20,8,4,3,7,3,3,18,139}；
字符串选项卡[]=新字符串[14]；
试一试{
InputStream ips=新文件InputStream（fichier）；
InputStreamReader ipsr=新的InputStreamReader（ips）；
BufferedReader br=新的BufferedReader（ipsr）；
for（int i=0；i在我看来，在创建流之后，您只需要在try/catch中移动for循环

public static void main(String[] args){
    String fichier ="E:\\fichiers\\test.txt";

    int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};
    String tabS[] = new String[14];

    try {

        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

        for(int i=0; i<tab.length; i++){

            char cbuf[] = new char[tab[i]];

            br.read(cbuf, 0, tab[i]);

            tabS[i] = new String(cbuf);
            System.out.println(tabS[i]);
        }

    } catch (Exception e){
        System.out.println(e.toString());
    }
}

publicstaticvoidmain（字符串[]args）{
字符串fichier=“E:\\fichiers\\test.txt”；
int tab[]={2,2,20,8,20,8,4,3,7,3,3,18,139}；
字符串选项卡[]=新字符串[14]；
试一试{
InputStream ips=新文件InputStream（fichier）；
InputStreamReader ipsr=新的InputStreamReader（ips）；
BufferedReader br=新的BufferedReader（ipsr）；
对于（int i=0；i看你有：

int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};

        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

您的输出是：

BO                        // length 2
BO                        // length 2
BOUUUUUUUUUUUUUUUUUU      // length 20
BOUUUUUU                  // length 8
BOUUUUUUUUUUUUUUUUUU
BOUUUUUU
BOUU
BOU
BOUUUUU
BOU
BOU
BOU
BOUUUUUUUUUUUUUUUU
BOUUUUUUUUUUUUUUUUUUUUUU!

考虑到：

        br.read(cbuf, 0, tab[i]);
        tabS[i] = new String(cbuf);
        System.out.println(tabS[i]);

它在每个迭代中从位置0开始，因为您有：

int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};

        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

在
for
循环中。只需将其从循环中删除即可纠正这种情况：

try 
{
        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

        for(int i=0; i<tab.length; i++)
        {
            char cbuf[] = new char[tab[i]];
            br.read(cbuf, 0, tab[i]);
            tabS[i] = new String(cbuf);

            System.out.println(tabS[i]);
        } 

}
catch (Exception e)
{
    System.out.println(e.toString());
}

试试看
{
InputStream ips=新文件InputStream（fichier）；
InputStreamReader ipsr=新的InputStreamReader（ips）；
BufferedReader br=新的BufferedReader（ipsr）；
对于（int i=0；i看你有：

int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};

        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

您的输出是：

BO                        // length 2
BO                        // length 2
BOUUUUUUUUUUUUUUUUUU      // length 20
BOUUUUUU                  // length 8
BOUUUUUUUUUUUUUUUUUU
BOUUUUUU
BOUU
BOU
BOUUUUU
BOU
BOU
BOU
BOUUUUUUUUUUUUUUUU
BOUUUUUUUUUUUUUUUUUUUUUU!

考虑到：

        br.read(cbuf, 0, tab[i]);
        tabS[i] = new String(cbuf);
        System.out.println(tabS[i]);

它在每个迭代中从位置0开始，因为您有：

int tab[] = {2, 2, 20, 8, 20, 8, 4, 3, 7, 3, 3, 3, 18, 139};

        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

在
for
循环中。只需将其从循环中删除即可纠正这种情况：

try 
{
        InputStream       ips  = new FileInputStream(fichier); 
        InputStreamReader ipsr = new InputStreamReader(ips);
        BufferedReader    br   = new BufferedReader(ipsr);

        for(int i=0; i<tab.length; i++)
        {
            char cbuf[] = new char[tab[i]];
            br.read(cbuf, 0, tab[i]);
            tabS[i] = new String(cbuf);

            System.out.println(tabS[i]);
        } 

}
catch (Exception e)
{
    System.out.println(e.toString());
}

试试看
{
InputStream ips=新文件InputStream（fichier）；
InputStreamReader ipsr=新的InputStreamReader（ips）；
BufferedReader br=新的BufferedReader（ipsr）；
对于（int i=0；iIt完全不清楚您试图在这里实现什么…但是此代码以多种方式被破坏。看起来您的程序正在完全按照您的要求执行：每次通过循环时，打开文件（从文件开头开始），读取一定数量的字符，然后打印出来。您希望实现什么？完全不清楚您在这里试图实现什么…但此代码以多种方式被破坏。看起来您的程序正按照您的要求执行：每次通过循环，打开文件（从文件开头开始），读一些字符，然后打印出来。你希望达到什么目的？