项目结构：
这里要实现的功能是，当我们给出了bean，如：Admin，User，People等实体类后，
我想用代码自动生成我想要的代码，最后生成的效果：
也就是说为每一个bean都生成相应的Dao，DaoImpl，Service，ServiceImpl等类。
后台运行效果：
下面是列出自动生成User的相关文件：
UseDao
、
UserDaoImpl
UserService
UserServiceImpl
=================================================
代码部分：
=================================================
/UUUU_Web_Test/src/com/b510/base/bean/install/BeanUtils.java
1 /**
2 *
3 */
4 package com.b510.base.bean.install;
5
6 import java.io.File;
7 import java.io.FileWriter;
8 import java.text.SimpleDateFormat;
9 import java.util.Date;
10
11
12 /**
13 * @author hongten(hongtenzone@foxmail.com)
14 * @date 2013-2-24
15 */
16 @SuppressWarnings("unchecked")
17 public class BeanUtils {
18
19
20
21 //公共部分
22 private static final String RT_1 = "\r\n";
23 private static final String RT_2 = RT_1+RT_1;
24 private static final String BLANK_1 =" ";
25 private static final String BLANK_4 =" ";
26 private static final String BLANK_8 =BLANK_4 + BLANK_4;
27
28
29
30 //注释部分
31 private static final String ANNOTATION_AUTHOR_PARAMTER = "@author ";
32 private static final String ANNOTATION_AUTHOR_NAME = "hongten(hongtenzone@foxmail.com)";
33 private static final String ANNOTATION_AUTHOR = ANNOTATION_AUTHOR_PARAMTER + ANNOTATION_AUTHOR_NAME;
34 private static final String ANNOTATION_DATE = "@date ";
35 private static final String ANNOTATION = "/**"+RT_1+BLANK_1+"*"+BLANK_1+ANNOTATION_AUTHOR +RT_1+BLANK_1+"*"+BLANK_1+ANNOTATION_DATE +getDate()+RT_1+BLANK_1+"*/"+RT_1;
36
37
38 //文件 地址
39 //private static final String BEAN_PATH = "com/b510/base/bean";
40 private static final String DAO_PATH = "com/b510/base/dao";
41 private static final String DAO_IMPL_PATH = "com/b510/base/dao/impl";
42 private static final String SERVICE_PATH = "com/b510/base/service";
43 private static final String SERVICE_IMPL_PATH = "com/b510/base/service/impl";
44
45
46
47 //包名
48 private static final String BEAN_URL = "com.b510.base.bean";
49 private static final String DAO_URL = "com.b510.base.dao";
50 private static final String DAO_IMPL_URL = "com.b510.base.dao.impl";
51 private static final String SERVICE_URL = "com.b510.base.service";
52 private static final String SERVICE_IMPL_URL = "com.b510.base.service.impl";
53
54 //基本类名称
55 private static final String BASE_DAO_NAME = DAO_URL + ".BaseDao";
56 private static final String ABSTRACT_BASE_DAO_IMPL_NAME = DAO_IMPL_URL + ".AbstractBaseDaoImpl";
57 private static final String BASE_SERVICE_NAME = SERVICE_URL + ".BaseService";
58 private static final String ABSTRACT_BASE_SERVICE_IMPL_NAME = SERVICE_IMPL_URL + ".AbstractBaseServiceImpl";
59
60
61 /**
62 * 创建bean的Dao<br>
63 *
64 * @param c
65 * @throws Exception
66 */
67 public void createBeanDao(Class c) throws Exception {
68 String cName = c.getName();
69 String fileName = System.getProperty("user.dir") + "/src/" + DAO_PATH
70 + "/" + getLastChar(cName) + "Dao.java";
71 File f = new File(fileName);
72 FileWriter fw = new FileWriter(f);
73 fw.write("package "+DAO_URL+";"+RT_2+ANNOTATION+"public interface " +
74 getLastChar(cName) + "Dao extends "+BASE_DAO_NAME+" <" + cName + "> {"+RT_2+"}");
75 fw.flush();
76 fw.close();
77 showInfo(fileName);
78 }
79
80 /**
81 * 创建bean的Dao的实现类
82 * @param c
83 * @throws Exception
84 */
85 public void createBeanDaoImpl(Class c) throws Exception{
86 String cName = c.getName();
87 String fileName = System.getProperty("user.dir") + "/src/" + DAO_IMPL_PATH
88 + "/" + getLastChar(cName) + "DaoImpl.java";
89 File f = new File(fileName);
90 FileWriter fw = new FileWriter(f);
91 fw.write("package "+DAO_IMPL_URL+";"+RT_2+ANNOTATION+"public class " +
92 getLastChar(cName) + "DaoImpl extends "+ABSTRACT_BASE_DAO_IMPL_NAME+"<" +
93 cName + "> implements "+DAO_URL+"."+getLastChar(cName)+"Dao{"+RT_2+"}");
94 fw.flush();
95 fw.close();
96 showInfo(fileName);
97 }
98
99
100
101 /**
102 * 创建bean的service
103 * @param c
104 * @throws Exception
105 */
106 public void createBeanService(Class c) throws Exception{
107 String cName = c.getName();
108 String fileName = System.getProperty("user.dir") + "/src/" + SERVICE_PATH
109 + "/" + getLastChar(cName) + "Service.java";
110 File f = new File(fileName);
111 FileWriter fw = new FileWriter(f);
112 fw.write("package "+SERVICE_URL+";"+RT_2+ANNOTATION+"public interface " +
113 getLastChar(cName) + "Service extends "+BASE_SERVICE_NAME+"<"+ cName +">{"+RT_2+"}");
114 fw.flush();
115 fw.close();
116 showInfo(fileName);
117 }
118
119 /**
120 * 创建bean的service的实现类
121 * @param c
122 * @throws Exception
123 */
124 public void createBeanServiceImpl(Class c) throws Exception{
125 String cName = c.getName();
126 String fileName = System.getProperty("user.dir") + "/src/" + SERVICE_IMPL_PATH
127 + "/" +getLastChar(cName)+"ServiceImpl.java";
128 File f = new File(fileName);
129 FileWriter fw = new FileWriter(f);
130 fw.write("package "+SERVICE_IMPL_URL+";"+RT_2+ANNOTATION+"public class "
131 + getLastChar(cName) + "ServiceImpl extends "+ABSTRACT_BASE_SERVICE_IMPL_NAME+"<"+ cName
132 + "> implements "+SERVICE_URL+"."+getLastChar(cName)+"Service{"+RT_2+BLANK_4
133 +"private "+DAO_URL+"."+getLastChar(cName)+"Dao "+getLowercaseChar(getLastChar(cName))
134 +"Dao;"+RT_2+BLANK_4+"public void set"+getLastChar(cName)+"Dao("+DAO_URL+"."+getLastChar(cName)+"Dao "
135 +getLowercaseChar(getLastChar(cName))+"Dao){"+RT_1+BLANK_8+"this."+getLowercaseChar(getLastChar(cName))+"Dao = "
136 +getLowercaseChar(getLastChar(cName))+"Dao;"+RT_1+BLANK_4+"}"+RT_2+BLANK_4+"@Override"+RT_1+BLANK_4
137 +"public "+DAO_URL+"."+"BaseDao<"+BEAN_URL+"."+getLastChar(cName)+"> getBaseDao(){"+RT_1+BLANK_8
138 +"return "+getLowercaseChar(getLastChar(cName))+"Dao;"+RT_1+BLANK_4+"}"+RT_2+"}");
139 fw.flush();
140 fw.close();
141 showInfo(fileName);
142 }
143
144
145 /**
146 * 获取路径的最后面字符串<br>
147 * 如：<br>
148 * <code>str = "com.b510.base.bean.User"</code><br>
149 * <code> return "User";<code>
150 * @param str
151 * @return
152 */
153 public String getLastChar(String str) {
154 if ((str != null) && (str.length() > 0)) {
155 int dot = str.lastIndexOf('.');
156 if ((dot > -1) && (dot < (str.length() - 1))) {
157 return str.substring(dot + 1);
158 }
159 }
160 return str;
161 }
162
163 /**
164 * 把第一个字母变为小写<br>
165 * 如：<br>
166 * <code>str = "UserDao";</code><br>
167 * <code>return "userDao";</code>
168 * @param str
169 * @return
170 */
171 public String getLowercaseChar(String str){
172 return str.substring(0,1).toLowerCase()+str.substring(1);
173 }
174
175 /**
176 * 显示信息
177 * @param info
178 */
179 public void showInfo(String info){
180 System.out.println("创建文件："+ info+ "成功！");
181 }
182
183 /**
184 * 获取系统时间
185 * @return
186 */
187 public static String getDate(){
188 SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
189 return simpleDateFormat.format(new Date());
190 }
191 }/UUUU_Web_Test/src/com/b510/base/bean/install/BeanUtilTest.java
1 /**
2 *
3 */
4 package com.b510.base.bean.install;
5
6 import com.b510.base.bean.Admin;
7 import com.b510.base.bean.People;
8 import com.b510.base.bean.User;
9
10 /**
11 * @author hongten(hongtenzone@foxmail.com)
12 * @date 2013-2-24
13 */
14 public class BeanUtilTest {
15
16 public static void main(String[] args) throws Exception{
17 BeanUtilTest beanUtilTest = new BeanUtilTest();
18 BeanUtils beanUtils = new BeanUtils();
19 beanUtilTest.beanTool(beanUtils, User.class);
20 beanUtilTest.beanTool(beanUtils, People.class);
21 beanUtilTest.beanTool(beanUtils, Admin.class);
22 }
23
24 /**
25 * 根据bean生成相应的文件
26 * @param beanUtils
27 * @param c
28 * @throws Exception
29 */
30 @SuppressWarnings("unchecked")
31 public void beanTool(BeanUtils beanUtils ,Class c)throws Exception{
32 beanUtils.createBeanDao(c);
33 beanUtils.createBeanDaoImpl(c);
34 beanUtils.createBeanService(c);
35 beanUtils.createBeanServiceImpl(c);
36 }
37 }