在java
中从文件映射对象
我想从文本文件中映射我的对象，文本文件内容是这样的：
~
attribute1value
attribute2value
attribute3value
attribute4value
attribute5value
attribute6value
~
attribute1value
attribute2value
attribute3value
attribute4value
attribute5value
attribute6value
...continued same
没有找到相关结果
已邀请:
4 个回复
拈吉勉犬姆
private String recordDelimiter = "~"; public static List<List<String>> parse(Reader reader) { List<List<String>> result = new ArrayList<List<String>>(); List<String> record = new ArrayList<String>(); boolean isFirstLine = true; while ((line = reader.readLine()) != null) { line = line.trim(); if (line.length() == 0) { continue; // we skip empty lines } if (delimiter.equals(line.trim()) { if (!isFirstLine) { result.add(record); record = new ArrayList<String>(); } else { isFirstLine = false; // we ignore a delimiter in the first line. } continue; } record.add(line); isFirstLine = false; } if (!result.contains(record)) result.add(record); // in case the last line is not a separator return result; }俺呵誓放胳
际恃啸称桅
BufferedReader reader = new BufferedReader(new FileReader("/path/to/file.txt")); String line = null; int count = 0; MyObject obj = null; while ((line = reader.readLine()) != null) { if(obj == null) obj = new MyObject(); if(count <= 6) { switch(count) { case 0: // ignore: handles '~' break; case 1: // assign value of line to first property, like: obj.prop1 = line; break; // etc up to case 6 } count++; } else { // here, store object somewhere, then... obj = null; count = 0; } }挂帘妈乡
public class Record { private String field1 = null; private String field2 = null; private String field3 = null; private String field4 = null; private String field5 = null; private String field6 = null; private void read(DataInputStream din) throws IOException, ClassNotFoundException { BufferedReader reader = new BufferedReader(new InputStreamReader(din)); field1 = reader.readLine(); field2 = reader.readLine(); field3 = reader.readLine(); field4 = reader.readLine(); field5 = reader.readLine(); field6 = reader.readLine(); reader.readLine(); // Skip separator line "~". } private static void main(String[] args) throws IOException, ClassNotFoundException { FileInputStream fin = new FileInputStream("C:\file.dat"); DataInputStream din = new DataInputStream(fin); Collection<Record> records = new LinkedList<Record>(); while(0 < din.available()) { Record record = new Record(); record.read(din); records.add(record); } } }