1、先上个预期的结果图：结果文件有三列，表头分别为id，Name，Desc
2、再上一段希望生成上述csv的代码：package chapter4;import java.坡纠课柩io.File;import java.io.FileWriter;import java.io.IOException;import java.util.ArrayList;import java.util.List;/*** Created by MyWorld on 2016/3/23.*/public class CsvWriteWithDoubleQuotation { public static void main(String[] args) throws IOException { List<Peron> source = getResult(); CsvWriteWithDoubleQuotation csvWriter = new CsvWriteWithDoubleQuotation(); csvWriter.write(source); } private void write(List<Peron> source) throws IOException { File file = new File("resultWithDoubleQuotation.csv"); System.out.println(file.getAbsolutePath()); FileWriter fw = new FileWriter(file); String title = "id,Name,Desc"; fw.write(title + "\n"); for (Peron peron : source) { fw.write(String.format("%s,%s,\"%s\"\n", peron.getId(), peron.getName(), peron.getDesc())); } fw.flush(); fw.close(); } private static List<Peron> getResult() { List<Peron> source = new ArrayList<Peron>(); source.add(new Peron(1, "Tom", "I li kui, nicknamed \"black tornado\"")); source.add(new Peron(2, "Jim", "I'm Jim")); source.add(new Peron(3, "John", "I'm John,twenty years old.")); return source; }}class Peron { private final int id; private final String name; private final String desc; public Peron(int id, String name, String desc) { this.id = id; this.name = name; this.desc = desc; } public int getId() { return id; } public String getName() { return name; } public String getDesc() { return desc; }}
3、执行上述代码，看看生成的结果文件是否与预期相同咦，怎么与预期的不是很一样了啊，左边的双引号怎么到后面了？
4、id,Name,Desc1,Tom,"I li kui, nicknamed "black tornado""2,Jim,"I'm Jim"3,John,"I'm John,twenty years old."
5、分析下原因：与预期输出不一致的一行：1,Tom巳呀屋饔,"I li kui, nicknamed "black tornado""貌似前面"I 造婷用痃li kui, nicknamed "是正常输出了，后面的两个双引号""照原样输出了原来，csv默认由英文双引号（""）括起来的内容是一个字段， 如果字符串放在英文双引号中，字符串中的内容除英文双引号外，都会按原样输出。那么，我们这次要输出的双引号呢？csv中约定，字段里连续两个双引号""显示成一个更改下代码：Code:source.add(new Peron(1, "Tom", "I li kui, nicknamed \"\"black tornado\"\""));source.add(new Peron(2, "Jim", "I'm Jim.\nAnd I'm a good boy."));
6、看看生成的结果与实际是否一致是一致的！！OK
