一个简单的类代码生成器

花了一点点时间，写了一个类玩玩，希望有点用。

类是怎么用的呢？

比如：输入：

public className; private String variable1; private Integer variable2; private Double variable3;

点击 Generate!，后，输出：

public className { private String variable1; private Integer variable2; private Double variable3; public String getVariable1() { return variable1; } public void setVariable1(String variable1) { this.variable1 = variable1; } public Integer getVariable2() { return variable2; } public void setVariable2(Integer variable2) { this.variable2 = variable2; } public Double getVariable3() { return variable3; } public void setVariable3(Double variable3) { this.variable3 = variable3; } }

 

哈哈，大家就知道它的用处了吧

源代码：

ClassGen.java                com.jrock.util

package com.jrock.util; /** * 输入的字符串格式为 * 限定符 类名; * 变量;变量;变量;... * 变量格式为{限定符 数据类型 变量名} * 其中: 限定符 (private/...) 不能省 * 类名 不能省 * 数据类型 (Integer/...) 不能省 * 变量名 不能省 * @version 1.0 */ public class ClassGen { public ClassGen() { } //去掉多余的空格 private static void dismissBlank(String[] array) { int len= array.length; boolean over =false; while(!over) { over=true; for (int i = 0; i < len; i++) { if (array[i].equals("")) { for (int j = i; j < len - 1; j++) { array[j] = array[j + 1]; } len--;over=false; } } } } public static String outGetter(String parStr) { String[] array = parStr.split(" "); if(array.length<3) return null; dismissBlank(array); String type = array[1]; String par = array[2]; StringBuffer result = new StringBuffer(); result.append("public " + type + " get" + par.substring(0,1).toUpperCase() + par.substring(1)); result.append("()\n{\n\t return " + par + ";\n}\n"); return result.toString(); } public static String outSetter(String parStr) { String[] array = parStr.split(" "); if(array.length<3) return null; dismissBlank(array); String type = array[1]; String par = array[2]; StringBuffer result = new StringBuffer(); result.append("public void set" + par.substring(0,1).toUpperCase() + par.substring(1)); result.append("(" + type + " " + par + ")\n{\n\t this."+ par + " = " + par + ";\n}"); return result.toString(); } //获得函数的主体 public static String getClassContent(String in) { if(in==null) return ""; in=in.replace('\n',' ').trim(); if(in.equals("")) return ""; StringBuffer result = new StringBuffer(); String [] parArray = in.split(";"); if(parArray.length>0) { //输出类名 result.append(parArray[0] + " {\n"); //输出变量 for (int i = 1; i < parArray.length; i++) { result.append(parArray[i] + ";\n"); } //输出setter和getter for (int i = 1; i < parArray.length; i++) { result.append(outGetter(parArray[i]) + "\n"); result.append(outSetter(parArray[i]) + "\n"); } result.append("}"); } return result.toString(); } //测试用的 public static void main(String[] args) { String inStr = "public className;\n" + "private String variable1;\n" + "private Integer variable2;\n" + "private Double variable3;\n"; System.out.println(getClassContent(inStr)); } }

 

GUI:

ClassGenApplication.java                com.jrock.util

import javax.swing.*; import java.awt.*; import java.awt.event.*; import com.jrock.util.ClassGen; public class ClassGenApplication { public Component createComponents() { String inStr = "public className;\n" + "private String variable1;\n" + "private Integer variable2;\n" + "private Double variable3;"; final JTextArea text1 = new JTextArea(inStr,20,40); final JTextArea text2 = new JTextArea("",20,50); text1.setFont(new java.awt.Font("Arial",java.awt.Font.PLAIN,20)); text2.setFont(new java.awt.Font("Arial",java.awt.Font.PLAIN,12)); // Create a scrollable text area JScrollPane sp1 = new JScrollPane(text1); JScrollPane sp2 = new JScrollPane(text2); JButton button = new JButton("Generate!"); button.setMnemonic(KeyEvent.VK_I); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { text2.setText( ClassGen.getClassContent(text1.getText())); } }); JPanel pane = new JPanel(); pane.setBorder(BorderFactory.createEmptyBorder( 20, //top 20, //left 200, //bottom 200) //right ); pane.setLayout(new GridLayout(0, 1)); pane.add(sp1); pane.add(button); pane.add(sp2); return pane; } public static void main(String[] args) { try { UIManager.setLookAndFeel( UIManager.getCrossPlatformLookAndFeelClassName()); } catch (Exception e) { } //Create the top-level container and add contents to it. JFrame frame = new JFrame("类生成工具"); ClassGenApplication app = new ClassGenApplication(); Component contents = app.createComponents(); frame.getContentPane().add(contents, BorderLayout.CENTER); //Finish setting up the frame, and show it. frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); frame.pack(); frame.setVisible(true); } }

 

Thanks.

 

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