mysql数据库 package com.s9.common.web; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.util.Date; public class GenEntityMysql { private String packageOutPath = "com.s9.cfj.user.entity";//指定实体生成所在包的路径 private String authorName = "郑云飞";//作者名字 private String tablename = "cfj_user";//表名 private String[] colnames; // 列名数组 private String[] colTypes; //列名类型数组 private int[] colSizes; //列名大小数组 private boolean f_util = false; // 是否需要导入包java.util.* private boolean f_sql = false; // 是否需要导入包java.sql.* //数据库连接 private static final String URL ="jdbc:mysql://localhost:3306/caifujie"; private static final String NAME = "root"; private static final String PASS = "root"; private static final String DRIVER ="com.mysql.jdbc.Driver"; /* * 构造函数 */ public GenEntityMysql(){ //创建连接 Connection con; //查要生成实体类的表 String sql = "select * from " + tablename; PreparedStatement pStemt = null; try { try { Class.forName(DRIVER); } catch (ClassNotFoundException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } con = DriverManager.getConnection(URL,NAME,PASS); pStemt = con.prepareStatement(sql); ResultSetMetaData rsmd = pStemt.getMetaData(); int size = rsmd.getColumnCount(); //统计列 colnames = new String[size]; colTypes = new String[size]; colSizes = new int[size]; for (int i = 0; i < size; i++) { colnames[i] = rsmd.getColumnName(i + 1); colTypes[i] = rsmd.getColumnTypeName(i + 1); if(colTypes[i].equalsIgnoreCase("datetime")){ f_util = true; } if(colTypes[i].equalsIgnoreCase("image") || colTypes[i].equalsIgnoreCase("text")){ f_sql = true; } colSizes[i] = rsmd.getColumnDisplaySize(i + 1); } String content = parse(colnames,colTypes,colSizes); try { File directory = new File(""); //System.out.println("绝对路径:"+directory.getAbsolutePath()); //System.out.println("相对路径:"+directory.getCanonicalPath()); String path=this.getClass().getResource("").getPath(); System.out.println(path); System.out.println("src/?/"+path.substring(path.lastIndexOf("/com/", path.length())) ); // String outputPath = directory.getAbsolutePath()+ "/src/"+path.substring(path.lastIndexOf("/com/", path.length()), path.length()) + initcap(tablename) + ".java"; String outputPath = directory.getAbsolutePath()+ "/src/"+this.packageOutPath.replace(".", "/")+"/"+initcap(tablename) + ".java"; FileWriter fw = new FileWriter(outputPath); PrintWriter pw = new PrintWriter(fw); pw.println(content); pw.flush(); pw.close(); } catch (IOException e) { e.printStackTrace(); } } catch (SQLException e) { e.printStackTrace(); } finally{ // try { // con.close(); // } catch (SQLException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } } } /** * 功能:生成实体类主体代码 * @param colnames * @param colTypes * @param colSizes * @return */ private String parse(String[] colnames, String[] colTypes, int[] colSizes) { StringBuffer sb = new StringBuffer(); sb.append("package " + this.packageOutPath + ";\r\n"); //判断是否导入工具包 if(f_util){ sb.append("import java.util.Date;\r\n"); } if(f_sql){ sb.append("import java.sql.*;\r\n"); } sb.append("\r\n"); //注释部分 sb.append(" /**\r\n"); sb.append(" * "+tablename+" 实体类\r\n"); sb.append(" * "+new Date()+" "+this.authorName+"\r\n"); sb.append(" */ \r\n"); //实体部分 sb.append("\r\n\r\npublic class " + initcap(tablename) + "{\r\n"); processAllAttrs(sb);//属性 processAllMethod(sb);//get set方法 sb.append("}\r\n"); //System.out.println(sb.toString()); return sb.toString(); } /** * 功能:生成所有属性 * @param sb */ private void processAllAttrs(StringBuffer sb) { for (int i = 0; i < colnames.length; i++) { sb.append("\tprivate " + sqlType2JavaType(colTypes[i]) + " " + colnames[i] + ";\r\n"); } } /** * 功能:生成所有方法 * @param sb */ private void processAllMethod(StringBuffer sb) { for (int i = 0; i < colnames.length; i++) { sb.append("\tpublic void set" + initcap(colnames[i]) + "(" + sqlType2JavaType(colTypes[i]) + " " + colnames[i] + "){\r\n"); sb.append("\tthis." + colnames[i] + "=" + colnames[i] + ";\r\n"); sb.append("\t}\r\n"); sb.append("\tpublic " + sqlType2JavaType(colTypes[i]) + " get" + initcap(colnames[i]) + "(){\r\n"); sb.append("\t\treturn " + colnames[i] + ";\r\n"); sb.append("\t}\r\n"); } } /** * 功能:将输入字符串的首字母改成大写 * @param str * @return */ private String initcap(String str) { char[] ch = str.toCharArray(); if(ch[0] >= 'a' && ch[0] <= 'z'){ ch[0] = (char)(ch[0] - 32); } return new String(ch); } /** * 功能:获得列的数据类型 * @param sqlType * @return */ private String sqlType2JavaType(String sqlType) { if(sqlType.equalsIgnoreCase("bit")){ return "boolean"; }else if(sqlType.equalsIgnoreCase("tinyint")){ return "byte"; }else if(sqlType.equalsIgnoreCase("smallint")){ return "short"; }else if(sqlType.equalsIgnoreCase("int")){ return "int"; }else if(sqlType.equalsIgnoreCase("bigint")){ return "long"; }else if(sqlType.equalsIgnoreCase("float")){ return "float"; }else if(sqlType.equalsIgnoreCase("decimal") || sqlType.equalsIgnoreCase("numeric") || sqlType.equalsIgnoreCase("real") || sqlType.equalsIgnoreCase("money") || sqlType.equalsIgnoreCase("smallmoney")){ return "double"; }else if(sqlType.equalsIgnoreCase("varchar") || sqlType.equalsIgnoreCase("char") || sqlType.equalsIgnoreCase("nvarchar") || sqlType.equalsIgnoreCase("nchar") || sqlType.equalsIgnoreCase("text")){ return "String"; }else if(sqlType.equalsIgnoreCase("datetime")){ return "Date"; }else if(sqlType.equalsIgnoreCase("image")){ return "Blod"; } return null; } /** * 出口 * TODO * @param args */ public static void main(String[] args) { new GenEntityMysql(); } }
oracle数据库
01.package com.db.gen.entity.tool; 02. 03. 04.import java.io.File; 05.import java.io.FileWriter; 06.import java.io.IOException; 07.import java.io.PrintWriter; 08.import java.sql.Connection; 09.import java.sql.DriverManager; 10.import java.sql.PreparedStatement; 11.import java.sql.ResultSet; 12.import java.sql.ResultSetMetaData; 13.import java.sql.SQLException; 14.import java.sql.Statement; 15.import java.util.Date; 16. 17.public class GenEntityOracle { 18. 19. private String packageOutPath = "com.user.entity";//指定实体生成所在包的路径 20. private String authorName = "郑云飞";//作者名字 21. private String tablename = "emp";//表名 22. private String[] colnames; // 列名数组 23. private String[] colTypes; //列名类型数组 24. private int[] colSizes; //列名大小数组 25. private boolean f_util = false; // 是否需要导入包java.util.* 26. private boolean f_sql = false; // 是否需要导入包java.sql.* 27. 28. //数据库连接 29. private static final String URL ="jdbc:oracle:thin:@127.0.0.1:1521:ORCL"; 30. private static final String NAME = "scrot"; 31. private static final String PASS = "tiger"; 32. private static final String DRIVER ="oracle.jdbc.driver.OracleDriver"; 33. 34. /* 35. * 构造函数 36. */ 37. public GenEntityOracle(){ 38. //创建连接 39. Connection con; 40. //查要生成实体类的表 41. String sql = "select * from " + tablename; 42. Statement pStemt = null; 43. try { 44. try { 45. Class.forName(DRIVER); 46. } catch (ClassNotFoundException e1) { 47. // TODO Auto-generated catch block 48. e1.printStackTrace(); 49. } 50. con = DriverManager.getConnection(URL,NAME,PASS); 51. pStemt = (Statement) con.createStatement(); 52. ResultSet rs = pStemt.executeQuery(sql); 53. ResultSetMetaData rsmd = rs.getMetaData(); 54. int size = rsmd.getColumnCount(); //统计列 55. colnames = new String[size]; 56. colTypes = new String[size]; 57. colSizes = new int[size]; 58. for (int i = 0; i < size; i++) { 59. colnames[i] = rsmd.getColumnName(i + 1); 60. colTypes[i] = rsmd.getColumnTypeName(i + 1); 61. 62. if(colTypes[i].equalsIgnoreCase("date") || colTypes[i].equalsIgnoreCase("timestamp")){ 63. f_util = true; 64. } 65. if(colTypes[i].equalsIgnoreCase("blob") || colTypes[i].equalsIgnoreCase("char")){ 66. f_sql = true; 67. } 68. colSizes[i] = rsmd.getColumnDisplaySize(i + 1); 69. } 70. 71. String content = parse(colnames,colTypes,colSizes); 72. 73. try { 74. File directory = new File(""); 75. //System.out.println("绝对路径:"+directory.getAbsolutePath()); 76. //System.out.println("相对路径:"+directory.getCanonicalPath()); 77. String path=this.getClass().getResource("").getPath(); 78. 79. System.out.println(path); 80. System.out.println("src/?/"+path.substring(path.lastIndexOf("/com/", path.length())) ); 81.// String outputPath = directory.getAbsolutePath()+ "/src/"+path.substring(path.lastIndexOf("/com/", path.length()), path.length()) + initcap(tablename) + ".java"; 82. String outputPath = directory.getAbsolutePath()+ "/src/"+this.packageOutPath.replace(".", "/")+"/"+initcap(tablename) + ".java"; 83. FileWriter fw = new FileWriter(outputPath); 84. PrintWriter pw = new PrintWriter(fw); 85. pw.println(content); 86. pw.flush(); 87. pw.close(); 88. } catch (IOException e) { 89. e.printStackTrace(); 90. } 91. 92. } catch (SQLException e) { 93. e.printStackTrace(); 94. } finally{ 95.// try { 96.// con.close(); 97.// } catch (SQLException e) { 98.// // TODO Auto-generated catch block 99.// e.printStackTrace(); 100.// } 101. } 102. } 103. 104. /** 105. * 功能:生成实体类主体代码 106. * @param colnames 107. * @param colTypes 108. * @param colSizes 109. * @return 110. */ 111. private String parse(String[] colnames, String[] colTypes, int[] colSizes) { 112. StringBuffer sb = new StringBuffer(); 113. 114. //判断是否导入工具包 115. if(f_util){ 116. sb.append("import java.util.Date;\r\n"); 117. } 118. if(f_sql){ 119. sb.append("import java.sql.*;\r\n"); 120. } 121. sb.append("package " + this.packageOutPath + ";\r\n"); 122. sb.append("\r\n"); 123. //注释部分 124. sb.append(" /**\r\n"); 125. sb.append(" * "+tablename+" 实体类\r\n"); 126. sb.append(" * "+new Date()+" "+this.authorName+"\r\n"); 127. sb.append(" */ \r\n"); 128. //实体部分 129. sb.append("\r\n\r\npublic class " + initcap(tablename) + "{\r\n"); 130. processAllAttrs(sb);//属性 131. processAllMethod(sb);//get set方法 132. sb.append("}\r\n"); 133. 134. //System.out.println(sb.toString()); 135. return sb.toString(); 136. } 137. 138. /** 139. * 功能:生成所有属性 140. * @param sb 141. */ 142. private void processAllAttrs(StringBuffer sb) { 143. 144. for (int i = 0; i < colnames.length; i++) { 145. sb.append("\tprivate " + sqlType2JavaType(colTypes[i]) + " " + colnames[i] + ";\r\n"); 146. } 147. 148. } 149. 150. /** 151. * 功能:生成所有方法 152. * @param sb 153. */ 154. private void processAllMethod(StringBuffer sb) { 155. 156. for (int i = 0; i < colnames.length; i++) { 157. sb.append("\tpublic void set" + initcap(colnames[i]) + "(" + sqlType2JavaType(colTypes[i]) + " " + 158. colnames[i] + "){\r\n"); 159. sb.append("\tthis." + colnames[i] + "=" + colnames[i] + ";\r\n"); 160. sb.append("\t}\r\n"); 161. sb.append("\tpublic " + sqlType2JavaType(colTypes[i]) + " get" + initcap(colnames[i]) + "(){\r\n"); 162. sb.append("\t\treturn " + colnames[i] + ";\r\n"); 163. sb.append("\t}\r\n"); 164. } 165. 166. } 167. 168. /** 169. * 功能:将输入字符串的首字母改成大写 170. * @param str 171. * @return 172. */ 173. private String initcap(String str) { 174. 175. char[] ch = str.toCharArray(); 176. if(ch[0] >= 'a' && ch[0] <= 'z'){ 177. ch[0] = (char)(ch[0] - 32); 178. } 179. 180. return new String(ch); 181. } 182. 183. /** 184. * 功能:获得列的数据类型 185. * @param sqlType 186. * @return 187. */ 188. private String sqlType2JavaType(String sqlType) { 189. 190. if(sqlType.equalsIgnoreCase("binary_double")){ 191. return "double"; 192. }else if(sqlType.equalsIgnoreCase("binary_float")){ 193. return "float"; 194. }else if(sqlType.equalsIgnoreCase("blob")){ 195. return "byte[]"; 196. }else if(sqlType.equalsIgnoreCase("blob")){ 197. return "byte[]"; 198. }else if(sqlType.equalsIgnoreCase("char") || sqlType.equalsIgnoreCase("nvarchar2") 199. || sqlType.equalsIgnoreCase("varchar2")){ 200. return "String"; 201. }else if(sqlType.equalsIgnoreCase("date") || sqlType.equalsIgnoreCase("timestamp") 202. || sqlType.equalsIgnoreCase("timestamp with local time zone") 203. || sqlType.equalsIgnoreCase("timestamp with time zone")){ 204. return "Date"; 205. }else if(sqlType.equalsIgnoreCase("number")){ 206. return "Long"; 207. } 208. 209. return "String"; 210. } 211. 212. /** 213. * 出口 214. * TODO 215. * @param args 216. */ 217. public static void main(String[] args) { 218. 219. new GenEntityOracle(); 220. 221. } 222. 223.}