//读文件的类
public class ReadWriteFile {
public static String[] ReadFile(String filestr) throws UnsupportedEncodingException, IOException {
String filePath=filestr; FileReader myFileR=new FileReader(filePath);
BufferedReader myBufferedReader=new BufferedReader(myFileR); String[] linestr=new String[5000];
int i=0;
while((linestr[i]=toUTF_8(myBufferedReader.readLine()))!=null){
i++;
} myBufferedReader.close();
return linestr;
}
}
//读配置文件的类
public class ReadFileList {
public static String[][] ReafFileList(String filelist) throws UnsupportedEncodingException, IOException{
String filePath=filelist;
String[] linestr=ReadWriteFile.ReadFile(filePath);
String [][] ss=new String[5000][2];
for(int i=0;i<linestr.length;i++){
ss[i]=linestr[i].split(" ");
}
return ss;
}
public static void main(String[] args) throws UnsupportedEncodingException, IOException {
String filelist="D:/tools/workspace/tabcompare/filelist.txt";
String[][] ss=ReafFileList(filelist);
for(int i=0;i<ss.length;i++){
for(int j=0;j<ss[i].length;j++){
System.out.print(ss[i][j]);
}
}
}
}配置文件内容如下:
ods_core_brt.txt空格ods_core_brt2.txt
ods_core_brta.txt空格ods_core_brta2.txt
ods_core_brtb.txt空格ods_core_brtb2.txt
我的目的就是把配置文件中以空格分隔的两列文件名称,读入到数组ss中。
但是我的程序运行后报错如下:
Exception in thread "main" java.lang.NullPointerException
at filecompare.ReadFileList.ReafFileList(ReadFileList.java:12)
at filecompare.ReadFileList.main(ReadFileList.java:18)
应该是这句出错的吧?你的数据才几条,你读进linestr时,只有前几个单元赋了值,后面都是null,一个null调用split,当然是NullPointerException了
at filecompare.ReadFileList.main(ReadFileList.java:18)都是指哪些行啊
可以用debug跟踪查看