Question

java读取文件夹下txt文件中特定信息(很急求解!!!)

现在一个文件夹在E盘下，路径为"E:\\七年级"，七年级文件夹下有"n.txt,n[1].txt,n[2].txt,n[3].txt......"以此类推到n[100].txt。每个txt文件中都包含了json格式的学生基本信息，如打开n.txt中信息如下：[{"sex":"0","date_created":"9/1/2017","city":"合肥","id":"1","url":"","email":"","true_name":"张三","telephone":"13000000000 "},{"sex":"1","date_created":"9/1/2017","city":"合肥","id":"2","url":"","email":"","true_name":"韩梅梅","telephone":"15111111111"},...],每个txt文件都包含类似这样的json学生信息。如何用java程序读取该文件夹中所有txt文件，并且将每个文件中学生的true_name和telephone提取出来，最终效果如下：
张三：13000000000
韩梅梅：15111111111
.
.
.
依次类推。

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Answer 1

java读取文件夹下txt文件中特定信息
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.<a href="https://www.baidu.com/s?wd=Sc&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1dBPWmLrj7BmhFbnHf3uWc10ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHm1n1mvPH01" target="_blank" class="baidu-highlight">Sc</a>anner;
public class TestRead {
public static void main(String[] args) throws IOException {

String uri = "d:\123.txt"

FileInputStream fis = new FileInputStream(uri);
InputStreamReader isr =new InputStreamReader(fis);
BufferedReader br = new BufferedReader(isr);
String s;
while((s=br.readLine())!=null){
//每次读取一行
}
}
}

Answer 2

现在一个文件夹在E盘下，路径为"E:\\七年级"，七年级文件夹下有"n.txt,n[1].txt,n[2].txt,n[3].txt"以此类推到n[100].txt。每个txt文件中都包含了json格式的学生基本信息，如打开n.txt中信息如下：[{"sex":"0","date_created":"9/1/2017","city":"合肥"