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简明Python教程命令行地址簿的Python与Java实现
最近读完了简明Python教程(A Byte of Python),在此书的最后作者建议读者实现一个命令行Python程序:
“在这个程序中,你可以添加、修改、删除和搜索你的联系人(朋友、家人和同事等等)以及它们的信息(诸如电子邮件地址和/或电话号码)。这些详细信息应该被保存下来以便以后提取。”
现在特地来交作业,同时对作者Swaroop, C. H.和译者沈洁元表示感谢!谢谢两位无私的奉献:)
操作系统windows7,Python版本2.7.5。
#address.py #首先我们需要一个字典用于存放联系人和他的地址信息,这份信息在硬盘上的保存方式为address.txt: address = {} ff = open("address.txt") #接下来是读取这个文本中的内容并存入字典中: while True: line = ff.readline() #逐行读取数据 if len(line) == 0: break if line == "\n": continue address[line.split(",")[0]]=line.split(",")[1] #添加文件内联系人数据至字典中 ff.close() #关闭 #实现添加方法: def addUser(): n = raw_input(‘name:‘) m = raw_input(‘address:‘) address[n]=m #写入字典 fileAdd = open("address.txt","a") #追加写入文件 fileAdd.write(n+","+m+"\n") fileAdd.close() #实现修改方法: def modify(): n = raw_input(‘name:‘) #获取待修改的用户名 if n in address: m = raw_input(‘address:‘) #获取修改后的地址 address[n]=m #修改字典并写入文件 fileModify = open("address.txt","w") for n,m in address.items(): fileModify.write(n+","+m+"\n") fileModify.close() else: print ‘cai wu ci ren‘ #实现删除方法: def delUser(): n = raw_input(‘name:‘) #获取输入的联系人 if n == "": return del address[n] #从字典中删除此联系人 fileDel = open("address.txt","w") #将字典中的联系人重新写入文件 for n,m in address.items(): fileDel.write(n+","+m+"\n") fileDel.close() #实现查询方法: def query(): n = raw_input(‘name:‘) #获取输入的联系人 if n in address: print n,address[n] #打印联系人信息 else: print ‘cai wu ci ren‘ #最后添加命令入口: flag= True #如果没有退出命令则一直接收命令行输入的命令 while flag: n = raw_input(‘operate:‘) #获取输入命令并调用相应方法 if n=="add": addUser() if n =="delete": delUser() if n == "query": query() if n == "modify": modify() if n == "show": print address if n=="Q": #退出执行 flag =False else: os.system(‘pause‘) #注意,Linux下无此方法
另外附上一个比较粗糙的Java实现:
package com.lyon.utils; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.util.HashMap; import java.util.Iterator; import java.util.Map; public class Address { static Map<String, String> addressMap = new HashMap<String, String>(); public static void main(String[] args) { File file = new File("C:\\pyTest\\address.txt"); BufferedReader reader = null; try { reader = new BufferedReader(new FileReader(file)); String tempString = null; while ((tempString = reader.readLine()) != null) { if (tempString.length() > 1) { String ss[] = tempString.split(","); addressMap.put(ss[0], ss[1]); } } reader.close(); } catch (IOException e) { e.printStackTrace(); } String s = readInput(); if (s == "Q") { System.out.println("tuichu"); return; } } public static String readInput() { while (true) { System.out.println("Operate:"); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String path = new String(); try { path = br.readLine(); } catch (IOException e) { e.printStackTrace(); } if (path.equals("add")) { add(); } else if (path.equals("delete")) { delete(); } else if (path.equals("query")) { query(); } else if (path.equals("modify")) { modify(); } else if (path.equals("Q")) { return "Q"; } else if (path.equals("show")) { System.out.println(addressMap); } else { System.out.println("input show,add,query,modify,delete or Q."); } } } @SuppressWarnings("rawtypes") private static void modify() { System.out.println("Name:"); BufferedReader brName = new BufferedReader(new InputStreamReader(System.in)); String name = new String(); try { name = brName.readLine(); } catch (IOException e) { e.printStackTrace(); } Iterator iter = addressMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry entry = (Map.Entry) iter.next(); Object key = entry.getKey(); if (key.equals(name)) { System.out.println("Address:"); BufferedReader brAddress = new BufferedReader(new InputStreamReader(System.in)); String address = new String(); try { address = brAddress.readLine(); } catch (IOException e) { e.printStackTrace(); } addressMap.put(name, address); } } try { FileWriter writer = new FileWriter("C:\\pyTest\\address.txt"); Iterator ite = addressMap.entrySet().iterator(); while (ite.hasNext()) { Map.Entry entry = (Map.Entry) ite.next(); Object key = entry.getKey(); Object val = entry.getValue(); writer.write(key + "," + val+ "\n"); } writer.close(); } catch (IOException e) { e.printStackTrace(); } } @SuppressWarnings("rawtypes") private static void query() { System.out.println("Name:"); BufferedReader brName = new BufferedReader(new InputStreamReader(System.in)); String name = new String(); try { name = brName.readLine(); } catch (IOException e) { e.printStackTrace(); } Iterator iter = addressMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry entry = (Map.Entry) iter.next(); Object key = entry.getKey(); if (key.equals(name)) { System.out.println(entry.getValue()); } } } @SuppressWarnings("rawtypes") private static void delete() { System.out.println("Name:"); BufferedReader brName = new BufferedReader(new InputStreamReader(System.in)); String name = new String(); try { name = brName.readLine(); } catch (IOException e) { e.printStackTrace(); } addressMap.remove(name); try { FileWriter writer = new FileWriter("C:\\pyTest\\address.txt"); Iterator iter = addressMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry entry = (Map.Entry) iter.next(); Object key = entry.getKey(); Object val = entry.getValue(); writer.write(key + "," + val+ "\n"); } writer.close(); } catch (IOException e) { e.printStackTrace(); } } private static void add() { System.out.println("Name:"); BufferedReader brName = new BufferedReader(new InputStreamReader(System.in)); String name = new String(); try { name = brName.readLine(); } catch (IOException e) { e.printStackTrace(); } System.out.println("Address:"); BufferedReader brAddress = new BufferedReader(new InputStreamReader(System.in)); String address = new String(); try { address = brAddress.readLine(); } catch (IOException e) { e.printStackTrace(); } addressMap.put(name, address); try { FileWriter writer = new FileWriter("C:\\pyTest\\address.txt", true); writer.write(name + "," + address + "\n"); writer.close(); } catch (IOException e) { e.printStackTrace(); } } }
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