从零开始学Java之IO字符流懒人模式（自动生成属性类，方法类，界面类）

   平时做一个项目都要建很多的属性类，方法类和View类，学了IO流之后想了一种办法，就是自己写一串代码，然后在文本文档里写class <类名>加上所有的属性，然后运行一下代码就自动生成了一个  <类名>.java   文件。用myeclipse打开就可以了。同样的道理，你写一个只有   class <类名> 的txt文本文档  点一下另一段代码就自动生成了一个方法类，里面带有增删改查四个简单方法的方法类，还有一个View类。

       首先说一下，生成属性类的这段代码：

 

package com.jereh.Generate;import java.io.*;import java.util.*;public class Generate1 {/** * @param args */public static void main(String[] args) {FileReader fr     = null;BufferedReader br = null;FileWriter fw     = null;BufferedWriter bw = null;int i=0;        File file1 = new File("E:\\IO\\原始\\1.txt");        File file2 = null;        try {        StringBuffer sbff = new StringBuffer();fr = new FileReader(file1);br = new BufferedReader(fr);String next; while(!((next = br.readLine())==null)){if(i==0){sbff.append("public ");sbff.append(next);sbff.append("{\r\n");String[] a = next.split(" "); file2 = new File("E:\\IO\\生成\\"+a[1]+".java");}else{sbff.append("    private ");    sbff.append(next+"\r\n");}i++;}sbff.append("}");fw = new FileWriter(file2);bw = new BufferedWriter(fw);bw.write(sbff.toString());} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{try {br.close();bw.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}

然后是生成方法类的代码：

<span style="font-size:18px;">package com.jereh.Generate;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class Generate2 {public static void main(String[] args){FileReader fr     = null;BufferedReader br = null;FileWriter fw     = null;BufferedWriter bw = null;StringBuffer sbff = new StringBuffer();int i=0;        File file1 = new File("E:\\IO\\原始\\2.txt");        File file2 = null;        try {fr = new FileReader(file1);br = new BufferedReader(fr);String next;while(!((next = br.readLine())==null)){if(i==0){String[] a = next.split(" ");file2 = new File("E:\\IO\\生成\\"+a[1]+".java");sbff.append("public ");sbff.append(next);sbff.append("{\r\n");}i++;}sbff.append("\t public void add(){}\r\n");sbff.append("\t public void delete(){}\r\n");sbff.append("\t public void update(){}\r\n");sbff.append("\t public void search(){}\r\n");sbff.append("}");fw = new FileWriter(file2);bw = new BufferedWriter(fw);bw.write(sbff.toString());} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{try {br.close();bw.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}</span>

最后是生成View界面的代码：

<span style="font-size:18px;">package com.jereh.Generate;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class Generate3 {public static void main(String[] args){FileReader fr     = null;BufferedReader br = null;FileWriter fw     = null;BufferedWriter bw = null;StringBuffer sbff = new StringBuffer();int i=0;        File file1 = new File("E:\\IO\\原始\\3.txt");        File file2 = null;        try {fr = new FileReader(file1);br = new BufferedReader(fr);String next;while(!((next = br.readLine())==null)){if(i==0){String[] a = next.split(" ");file2 = new File("E:\\IO\\生成\\"+a[1]+".java");sbff.append("public ");sbff.append(next);sbff.append("{\r\n");}i++;}sbff.append("\t public void addView(){}\r\n");sbff.append("\t public void deleteView(){}\r\n");sbff.append("\t public void updateView(){}\r\n");sbff.append("\t public void searchView(){}\r\n");sbff.append("\t public void main(){\r\n");sbff.append("\t \t System.out.println();\r\n");sbff.append("\t \t System.out.println();\r\n");sbff.append("\t \t System.out.println();\r\n");sbff.append("\t \t System.out.println();\r\n");sbff.append("\t \t System.out.println();\r\n");sbff.append("\t \t int i = input.nextInt();\r\n");sbff.append("\t \t switch(i){\r\n");sbff.append("\t \t case 1:\r\n");sbff.append("\t \t    addView();\r\n");sbff.append("\t \t     break;\r\n");sbff.append("\t \t case 2:\r\n");sbff.append("\t \t    deleteView();{\r\n");sbff.append("\t \t     break;\r\n");sbff.append("\t \t case 3:\r\n");sbff.append("\t \t    updateView();{\r\n");sbff.append("\t \t     break;\r\n");sbff.append("\t \t case 4:\r\n");sbff.append("\t \t    searchView();{\r\n");sbff.append("\t \t     break;\r\n");sbff.append("\t \t default:\r\n");sbff.append("\t \t     break;{\r\n");sbff.append("\t \t}\r\n");sbff.append("\t }\r\n");sbff.append("}");fw = new FileWriter(file2);bw = new BufferedWriter(fw);bw.write(sbff.toString());} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{try {br.close();bw.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}</span>