读取CSV文件，并解析为list

package com.lhx.test.utils;

import com.alibaba.dubbo.common.utils.CollectionUtils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by lhx on 2019/6/18
 * Desc :
 */
public class CSVRead {

    private BufferedReader br;

    //读取文件时，是否还有下一行
    private boolean hasNext = true;

    //元素之间的分隔符
    private char elementSeparator;

    //引号
    private char quoteChar;

    //转义符
    private char escape;

    //跳过的行数
    private int skipLines;

    //是否跳过行
    private boolean linesSkipped = true;

    private static final char DEFAULT_SEPARATOR = ',';

    private static final int INITIAL_READ_SIZE = 64;

    private static final char DEFAULT_QUOTE_CHARACTER = '"';

    private static final char DEFAULT_ESCAPE_CHARACTER = '\\';

    private static final int DEFAULT_SKIP_LINES = 0;

    // 解析文件核心代码
    private ArrayList<String> parseNextLine(String nextLine) {
        ArrayList<String> inner = new ArrayList<String>();
        StringBuilder sb = new StringBuilder(INITIAL_READ_SIZE);
        //是否在引用符号约束之内，为true时表示目前已经遍历到引号之内的字符了，默认不在引号之内，所以使用do while循环，强制第一次进行循环
        boolean within = false;
        /*do {*/
            for (int index = 0; index < nextLine.length(); index++) {
                char chr = nextLine.charAt(index);
                //如果当前符号为转义符，则取转义符后面的字符，同时索引前进一位，获取转义符后面的一位，拼接到结果字符串中
                if (escape == chr) {
                    //如果下一个字符在引用符号范围内，且该字符后面以为不是转义符也不是引用符，则认为是正常可获取并展示