FileWriter字符流写入缓存限制

在操作文件字符读写的时候，出现了文字写入不全的情况，经过检查，发现FileWriter存在写入大小限制，最大为24KB,如图

代码如下：

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;

/**
 * 作者：Haibo.Liu
 * 描述：
 * 日期： 2017/5/8
 * QQ：836915746
 */
public class GetXml2 {

    private static String pathLog = "C:\\Users\\Haibo\\Desktop\\1_show_ziwojieshao.xml";//xml路径1
    private static String pathXml = "C:\\Users\\Haibo\\Desktop\\1111.xml";//xml路径2

    public static void main(String[] args) throws Exception {
        //清空文件
        FileWriter writer = new FileWriter(pathXml);
        writer.write("");
        writer.close();

        FileWriter writerTo = new FileWriter(pathXml, true);

        FileReader fr = new FileReader(pathLog);//获取文件流
        BufferedReader br = new BufferedReader(fr); //将流整体读取。
        String str;

        int action = 1;
        double actionTime = 0;
        while ((str = br.readLine()) != null) {//判断是否是最后一行
            if (str.indexOf("actionGroup actionTime") != -1) {
                int a = str.indexOf("\"", 0);
                int b = str.indexOf("\"", a+1);
                double time = Double.parseDouble(str.substring(a+1,b));
                writerTo.write("\t<actionGroup actionTime = \""+(time-96)+"\">\r\n");

            }else {
                writerTo.write(str+"\r\n");
            }
        }
        System.out.println("Finish");
    }
}

解决方案，在每次写入的时候flush()一下

修改后代码

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;

/**
 * 作者：Haibo.Liu
 * 描述：
 * 日期： 2017/5/8
 * QQ：836915746
 */
public class GetXml2 {

    private static String pathLog = "C:\\Users\\Haibo\\Desktop\\1_show_ziwojieshao.xml";//xml路径1
    private static String pathXml = "C:\\Users\\Haibo\\Desktop\\1111.xml";//xml路径2

    public static void main(String[] args) throws Exception {
        //清空文件
        FileWriter writer = new FileWriter(pathXml);
        writer.write("");
        writer.close();

        FileWriter writerTo = new FileWriter(pathXml, true);

        FileReader fr = new FileReader(pathLog);//获取文件流
        BufferedReader br = new BufferedReader(fr); //将流整体读取。
        String str;

        int action = 1;
        double actionTime = 0;
        while ((str = br.readLine()) != null) {//判断是否是最后一行
            if (str.indexOf("actionGroup actionTime") != -1) {
                int a = str.indexOf("\"", 0);
                int b = str.indexOf("\"", a+1);
                double time = Double.parseDouble(str.substring(a+1,b));
                writerTo.write("\t<actionGroup actionTime = \""+(time-96)+"\">\r\n");

            }else {
                writerTo.write(str+"\r\n");
            }
            writerTo.flush();
        }
        System.out.println("Finish");
    }
}