从类似如下的文本文件中读取出所有的姓名，并打印出重复的姓名和重复的次数，并按重复次数排序
1,张三,28
2,李四,35
3,张三,28
4,王五,35
5,张三,28
6,李四,35
7,赵六,28
8,田七,35
package com.swift; import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap; import org.apache.poi.xwpf.extractor.XWPFWordExtractor;
import org.apache.poi.xwpf.usermodel.XWPFDocument; public class IO_Sort_Select { public static void main(String[] args) throws IOException {
/*
* 从类似如下的文本文件中读取出所有的姓名，并打印出重复的姓名和重复的次数，并按重复次数排序
*/
File file_s = new File("e:\\neck\\data.docx");
File dir = new File("e:\\neck");
if (!dir.exists() && dir.isDirectory()) {
System.out.println("目录不存在，即将创建...");
dir.mkdirs();
}
File file_t = new File(dir, "data.txt"); List<String> list = new ArrayList<String>();
String text = readFromDocx(file_s);
String[] hang = text.split("\\n");
for (int i = 0; i < hang.length; i++) {
String[] lie = hang[i].split("\\,");
for (int j = 0; j < lie.length; j++) {
if (j == 1) {
list.add(lie[j]);
}
} }
printList(list); Map<String, Integer> map = new TreeMap<String, Integer>();
for (String str : list) {
map.put(str, 0);
}
for(String str:list) {
if(map.containsKey(str)) {
int num=map.get(str);
num++;
map.remove(str);
map.put(str, num);
}
}
List<Entry<String,Integer>> listMap=new ArrayList<Entry<String,Integer>>(map.entrySet());
Collections.sort(listMap, new Comparator<Entry<String,Integer>>(){ @Override
public int compare(Entry<String, Integer> arg0, Entry<String, Integer> arg1) {
int num=arg1.getValue()-arg0.getValue();
return num==0?arg0.getKey().compareTo(arg1.getKey()):num;
}
}); for(Entry<String, Integer> entry:listMap) {
System.out.println("重复的姓名是 ："+entry.getKey()+" 重复的次数是："+entry.getValue());
}
} private static void printList(List<String> list) {
for (String str : list) {
System.out.println(str);
}
} public static String readFromDocx(File file) throws IOException { FileInputStream fis = new FileInputStream(file);
XWPFDocument docx = new XWPFDocument(fis);
XWPFWordExtractor extractor = new XWPFWordExtractor(docx);
String text = extractor.getText();
return text; } }
上面代码读取的是docx的word文件，直接读取会出现乱码，因word中不仅有文本还有压缩的其他属性等内容，所以要使用poi的jar包进行解析
解析的jar包如下图
这个应该比较全面了，也可以解析excel操作或写入表格等
下载地址：
链接: https://pan.baidu.com/s/1htYPKLA 密码: e36e
下面是读取doc的方法
package com.swift; import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap; import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.xwpf.extractor.XWPFWordExtractor;
import org.apache.poi.xwpf.usermodel.XWPFDocument; public class IO_Sort_Select { public static void main(String[] args) throws IOException {
/*
* 从类似如下的文本文件中读取出所有的姓名，并打印出重复的姓名和重复的次数，并按重复次数排序
*/
File file_s = new File("e:\\neck\\data.doc");
File dir = new File("e:\\neck");
if (!dir.exists() && dir.isDirectory()) {
System.out.println("目录不存在，即将创建...");
dir.mkdirs();
} List<String> list = new ArrayList<String>();
String text = readFromDoc(file_s);
String[] hang = text.split("\\r");
for (int i = 0; i < hang.length; i++) {
System.out.println(hang.length);
System.out.println(hang[i]);
String[] lie = hang[i].split("\\,");
for (int j = 0; j < lie.length; j++) {
if (j == 1) {
list.add(lie[j]);
}
}
}
printList(list); Map<String, Integer> map = new TreeMap<String, Integer>();
for (String str : list) {
map.put(str, 0);
}
for(String str:list) {
if(map.containsKey(str)) {
int num=map.get(str);
num++;
map.remove(str);
map.put(str, num);
}
}
List<Entry<String,Integer>> listMap=new ArrayList<Entry<String,Integer>>(map.entrySet());
Collections.sort(listMap, new Comparator<Entry<String,Integer>>(){ @Override
public int compare(Entry<String, Integer> arg0, Entry<String, Integer> arg1) {
int num=arg1.getValue()-arg0.getValue();
return num==0?arg0.getKey().compareTo(arg1.getKey()):num;
}
}); for(Entry<String, Integer> entry:listMap) {
System.out.println("重复的姓名是 ："+entry.getKey()+" 重复的次数是："+entry.getValue());
}
} private static void printList(List<String> list) {
for (String str : list) {
System.out.println(str);
}
} public static String readFromDocx(File file) throws IOException { FileInputStream fis = new FileInputStream(file);
XWPFDocument docx = new XWPFDocument(fis);
XWPFWordExtractor extractor = new XWPFWordExtractor(docx);
String text = extractor.getText();
return text;
}
public static String readFromDoc(File file) throws IOException { FileInputStream fis = new FileInputStream(file);
HWPFDocument doc = new HWPFDocument(fis);
String text = doc.getDocumentText();
return text;
} }
doc读取出来的文本还不能用"\\n"进行行分割，用的是"\\r"才行，要不然只能分割出1行，这点注意，要不会觉得程序莫名其妙不安自己的思路走