android 解析CSV , 使用CSVReader

mac2022-06-30  88

private void getCSV(){ String speakerPath = filePath + "SeminarSpeaker.csv";//csv路径 File speakerCSVFile = new File(filePath + "SeminarSpeaker.csv"); ArrayList<String> strLists = new ArrayList<String>(); if (mSpeakerLists != null) { mSpeakerLists.clear(); } else mSpeakerLists = new ArrayList<SeminarSpeaker>(); try { bReader = new BufferedReader(new FileReader(speakerCSVFile)); CSVReader csvReader = new CSVReader(bReader);//这里以“|”为分隔符,可在CSVReader类中修改 String[] next = {}; while (true) { next = csvReader.readNext(); if (next != null) { SeminarSpeaker speaker = new SeminarSpeaker(next[0], next[1], next[2], next[3], next[4], next[5], next[6],next[7],next[8],next[9],next[10],next[11],next[12],next[13]);//实体类,一行有多少个数据就写多少个 mSpeakerLists.add(speaker); } else { break; } } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }finally { if (bReader != null) { try { bReader.close(); } catch (IOException e) { e.printStackTrace(); } } } Log.i(TAG, "speaklists="+mSpeakerLists.size()); } SeminarSpeaker.java public class SeminarSpeaker { //EventID|CompanyID|Seminarsummary|SpeakerPhoto|SpeakerName|SpeakerPosition|SpeakerInfo|Language|FreeParticipation|ContactPerson|Email|Tel|LangID|ID|SeqNo public String eventID; public String companyID; public String seminarSummary; public String speakerPhoto; public String speakerName; public String speakerPosition; public String speakerInfo; public String language; public String freeParticipation; public String contactPerson; public String email; public String tel; public String langID; public String id; public SeminarSpeaker(String eventID, String companyID, String seminarSummary, String speakerPhoto, String speakerName, String speakerPosition, String speakerInfo, String language, String freeParticipation, String contactPerson, String email, String tel, String langID, String id) { this.eventID = eventID; this.companyID = companyID; this.seminarSummary = seminarSummary; this.speakerPhoto = speakerPhoto; this.speakerName = speakerName; this.speakerPosition = speakerPosition; this.speakerInfo = speakerInfo; this.language = language; this.freeParticipation = freeParticipation; this.contactPerson = contactPerson; this.email = email; this.tel = tel; this.langID = langID; this.id = id; } } CSVReader.java : 工具类 package com.adsale.ChinaPlas.util; import java.io.BufferedReader; import java.io.IOException; import java.io.Reader; import java.util.ArrayList; import java.util.List; import android.util.Log; /** * A very simple CSV reader released under a commercial-friendly license. * * @author Glen Smith * */ public class CSVReader { private BufferedReader br; private boolean hasNext = true; private char separator; private char quotechar; private int skipLines; private boolean linesSkiped; /** The default separator to use if none is supplied to the constructor. */ public static final char DEFAULT_SEPARATOR = '|'; /** * The default quote character to use if none is supplied to the * constructor. */ public static final char DEFAULT_QUOTE_CHARACTER = '"'; /** * The default line to start reading. */ public static final int DEFAULT_SKIP_LINES = 0; /** * Constructs CSVReader using a comma for the separator. * * @param reader * the reader to an underlying CSV source. */ public CSVReader(Reader reader) { this(reader, DEFAULT_SEPARATOR, DEFAULT_QUOTE_CHARACTER, DEFAULT_SKIP_LINES); } /** * Constructs CSVReader with supplied separator and quote char. * * @param reader * the reader to an underlying CSV source. * @param separator * the delimiter to use for separating entries * @param quotechar * the character to use for quoted elements * @param line * the line number to skip for start reading */ public CSVReader(Reader reader, char separator, char quotechar, int line) { this.br = new BufferedReader(reader); this.separator = separator; this.quotechar = quotechar; this.skipLines = line; } /** * Reads the next line from the buffer and converts to a string array. * * @return a string array with each comma-separated element as a separate * entry. * * @throws IOException * if bad things happen during the read */ public String[] readNext() throws IOException { String nextLine = getNextLine(); return hasNext ? parseLine(nextLine) : null; } /** * Reads the next line from the file. * * @return the next line from the file without trailing newline * @throws IOException * if bad things happen during the read */ private String getNextLine() throws IOException { if (!this.linesSkiped) { for (int i = 0; i < skipLines; i++) { br.readLine(); } this.linesSkiped = true; } String nextLine = br.readLine(); if (nextLine == null) { hasNext = false; } return hasNext ? nextLine : null; } /** * Parses an incoming String and returns an array of elements. * * @param nextLine * the string to parse * @return the comma-tokenized list of elements, or null if nextLine is null * @throws IOException if bad things happen during the read */ private String[] parseLine(String nextLine) throws IOException { if (nextLine == null) { return null; } List<String> tokensOnThisLine = new ArrayList<String>(); StringBuffer sb = new StringBuffer(); boolean inQuotes = false; do { if (inQuotes) { // continuing a quoted section, reappend newline sb.append("\n"); nextLine = getNextLine(); if (nextLine == null) break; } for (int i = 0; i < nextLine.length(); i++) { char c = nextLine.charAt(i); // if (c == quotechar) { // // this gets complex... the quote may end a quoted block, or escape another quote. // // do a 1-char lookahead: // if( inQuotes // we are in quotes, therefore there can be escaped quotes in here. // && nextLine.length() > (i+1) // there is indeed another character to check. // && nextLine.charAt(i+1) == quotechar ){ // ..and that char. is a quote also. // // we have two quote chars in a row == one quote char, so consume them both and // // put one on the token. we do *not* exit the quoted text. // sb.append(nextLine.charAt(i+1)); // i++; // }else{ // inQuotes = !inQuotes; // // the tricky case of an embedded quote in the middle: a,bc"d"ef,g // if(i>2 //not on the begining of the line // && nextLine.charAt(i-1) != this.separator //not at the begining of an escape sequence // && nextLine.length()>(i+1) && // nextLine.charAt(i+1) != this.separator //not at the end of an escape sequence // ){ // sb.append(c); // } // } if (c == separator && !inQuotes) { tokensOnThisLine.add(sb.toString()); sb = new StringBuffer(); // start work on next token } else { sb.append(c); } } } while (inQuotes); tokensOnThisLine.add(sb.toString()); return (String[]) tokensOnThisLine.toArray(new String[0]); } /** * Closes the underlying reader. * * @throws IOException if the close fails */ public void close() throws IOException{ br.close(); } }

 

转载于:https://www.cnblogs.com/carrieLee/p/5160674.html

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