Mybatis代码生成工具
来源：互联网 发布：windows经典模式 编辑：程序博客网 时间：2024/05/18 16:35
/** * Author: fuchunyu * Date: 2017/6/28 * Description：mybaits 代码生成工具 */public class CodeGenerator { //项目名称，生成前请检查 private final static String PROJECT_NAME = "core"; private final static String SRC_MENU = "src"; private final static String MAVEN_SRC_MENU = "src" + File.separator + "main" + File.separator + "java"; public static void main(String[] args) { String zhangyoo = "com" + File.separator + "stlm2" + File.separator + "dems"+File.separator+"user"; new CodeGenerator(zhangyoo, MAVEN_SRC_MENU); } private final static String BASE_DAO_NAME = "com.stlm2.core.base.BaseDao"; private final static String BASE_DAO_IMPL_NAME = "com.stlm2.core.base.impl.BaseDaoImpl"; private final static String BASE_SERVICE_IMPL_NAME = "com.stlm2.core.base.impl.BaseServiceImpl"; private String basePackage; private String packageName; /** * 包名 * * @param packageName */ public CodeGenerator(String packageName, String srcMenu) { this.packageName = packageName; this.basePackage = this.getProjectPath() + File.separator + srcMenu + File.separator + packageName; System.out.println(this.packageName); System.out.println(this.basePackage); generatorMapper(packageName); System.out.println(packageName + "下mapper文件生成完毕"); generator(); System.out.println(packageName + "下dao、service层文件生成完毕"); } /** * 遍历目录并生成代码 */ private void generator() { String mapperPath = basePackage + File.separator + "mapper"; File mapperPackage = new File(mapperPath); if (mapperPackage.exists() && mapperPackage.isDirectory()) { for (File file : mapperPackage.listFiles()) { String className = file.getName(); className = className.substring(0, className.indexOf(".")); generatorDao(className); generatorDaoImpl(className); generatorService(className); } } } /** * 生成mapper文件 */ private void generatorMapper(String packageName){ String basePath = basePackage + File.separator + "entity" + File.separator + "base"; File entityPackage = new File(basePath); if (entityPackage.exists() && entityPackage.isDirectory()) { for (File file : entityPackage.listFiles()) { String className = file.getName(); className = className.substring(0, className.indexOf(".")); try { Class clazz = Class.forName(packageName.replace(File.separator, ".") + ".entity." + className.substring(4)); if(clazz == null) continue; String entityName = clazz.getName();//namespace {1} String simpleName = clazz.getSimpleName();//type {2} //如果mapper文件已经存在，则跳过，防止覆盖 String mapperPath = basePackage + File.separator + "mapper"; File mapperPathFile = new File(mapperPath); if (!mapperPathFile.exists()) { mapperPathFile.mkdir(); } String mapperFileName = mapperPath + File.separator + simpleName + ".mapper.xml"; File mapperFile = new File(mapperFileName); if (mapperFile.exists()) continue; Method [] methods = clazz.getSuperclass().getDeclaredMethods(); String resultMap = "";//resultMap代码 {3} String resultMapTemplate = "<result property=\"{{1}}\" column=\"{{2}}\" jdbcType=\"{{3}}\"/>";//resultMap模板 String selectField = "*";//查询字段 {5} String add = "";//插入语句 {6} String addColumn = ""; String addProperty = ""; String update = "";//更新语句 {7} for(Method method:methods){ String name = method.getName(); //仅取出所有get方法，且不包含ID，不包含枚举映射 if(!name.substring(0, 3).equals("get") || name.equals("getId") || name.substring(name.length() - 5).equals("Value")) continue; boolean isEnum = isEnum(method.getReturnType()); String property = name.substring(3);//属性名 {{1}} String column = getColumn(property);//字段名 {{2}} property = property.substring(0, 1).toLowerCase() + property.substring(1);//将属性第一字母小写 if(isEnum) //如果是枚举，需要修改属性名 property = property + "Value"; String jdbcType = getJdbcType(method.getReturnType());//{{3}} resultMap = resultMap + "\t\t" + resultMapTemplate.replace("{{1}}", property).replace("{{2}}", column).replace("{{3}}", jdbcType) + "\n"; addColumn = addColumn + "\t\t" + column + ",\n"; addProperty = addProperty + "\t\t#{" + property + "},\n"; update = update + "\t\t" + column + "=#{" + property + "},\n"; } resultMap = resultMap.substring(2, resultMap.length() - 1);//去掉开始的制表符、结尾换行符 addColumn = addColumn.substring(0, addColumn.length() - 2) + "\n";//去掉结尾的逗号 addProperty = addProperty.substring(0, addProperty.length() - 2);//去掉结尾的逗号 add = "(\n" + addColumn + "\t\t) values (\n" + addProperty + " )"; update = update.substring(2, update.length() - 2);//去掉开始的制表符、结尾的逗号 String content = getMapperTemplate().replace("{1}", entityName).replace("{2}", simpleName).replace("{3}", resultMap).replace("{5}", selectField).replace("{6}", add).replace("{7}", update); //生成mapper文件 BufferedWriter out = new BufferedWriter(new FileWriter(mapperFile)); out.write(content, 0, content.length()); out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); } } } } /** * 将驼峰转换为下划线 * @param name * @return */ private static String getColumn(String name) { StringBuilder result = new StringBuilder(); if (name != null && name.length() > 0) { for (int i = 0; i < name.length(); i++) { String s = name.substring(i, i + 1); // 在大写字母前添加下划线 if (i!= 0 && s.equals(s.toUpperCase()) && !Character.isDigit(s.charAt(0))) result.append("_"); // 其他字符直接转成大写 result.append(s.toUpperCase()); } } String column = result.toString(); if(column.equals("VALID")) column = "IS_VALID"; return column; } /** * 是否为枚举 * @param clazz * @return */ private boolean isEnum(Class<?> clazz){ if(clazz != null) { if (clazz.isEnum()) return true; } return false; } /** * 根据方法类型获得映射类型 * @param type * @return */ private String getJdbcType(Object type){ if(type.toString().contains("Long")) return "BIGINT"; else if(type.toString().contains("Integer")) return "INTEGER"; else if(type.toString().contains("String")) return "VARCHAR"; else if(type.toString().contains("Boolean")) return "TINYINT"; else if(type.toString().contains("Double")) return "DOUBLE"; else if(type.toString().contains("Date")) return "TIMESTAMP"; else if(isEnum((Class<?>) type)){ return "TINYINT"; } return ""; } /** * 获得mapper文件模板 * @return */ private String getMapperTemplate(){ return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + "<!DOCTYPE mapper PUBLIC \"-//mybatis.org//DTD Mapper 3.0//EN\"\n" + "\t\t\"classpath://mybatis-3-mapper.dtd\">\n" + "<mapper namespace=\"{1}\">\n" + "\t<resultMap type=\"{2}\" id=\"resultMap\">\n" + "\t\t<id property=\"id\" column=\"ID\"/> \n" + "\t\t{3}\n" + "\t</resultMap>\n" + "\n" + "\t<sql id=\"table\"></sql>\n" + "\t\n" + "\t<sql id=\"selectField\">\n" + "\t\t{5}\n" + "\t</sql>\n" + "\t\n" + "\t<insert id=\"add\" parameterType=\"{2}\">\n" + "\t\t<selectKey resultType=\"Integer\" keyProperty=\"id\" order=\"AFTER\">\n" + "\t\t\tSELECT\n" + "\t\t\tLAST_INSERT_ID() AS ID\n" + "\t\t</selectKey>\n" + "\t\tinsert into <include refid=\"table\" />\n" + "\t\t{6}\n" + "\t</insert>\n" + "\t\n" + "\t<delete id=\"deleteById\" parameterType=\"Integer\">\n" + "\t\tdelete from <include refid=\"table\" /> where ID=#{id}\n" + "\t</delete>\n" + "\t\n" + "\t<update id=\"update\" parameterType=\"{2}\">\n" + "\t\tupdate <include refid=\"table\" />\n" + "\t\t<set>\n" + "\t\t{7}\n" + "\t\t</set>\n" + "\t\twhere ID=#{id}\n" + "\t</update>\n" + "\t\n" + "\t<select id=\"queryAll\" resultMap=\"resultMap\">\n" + "\t\tselect <include refid=\"selectField\" /> from <include refid=\"table\" />\n" + "\t</select>\n" + "\t\n" + "\t<select id=\"query\" resultMap=\"resultMap\" parameterType=\"java.util.HashMap\">\n" + "\t\tselect\n" + "\t\t<include refid=\"selectField\" />\n" + "\t\tfrom <include refid=\"table\" />\n" + "\t\t<where>\n" + "\t\t\t1=1\n" + "\t\t\t\n" + "\t\t</where>\n" + "\t\torder by ID desc\n" + "\t</select>\n" + "\t\n" + "\t<!-- 根据ID查询 -->\n" + "\t<select id=\"getById\" parameterType=\"Integer\" resultMap=\"resultMap\">\n" + "\t\tselect <include refid=\"selectField\" /> from <include refid=\"table\" /> where ID=#{id}\n" + "\t</select>\n" + "</mapper>"; } /** * 生成dao层代码 */ private void generatorDao(String className) { String entityImport = packageName + File.separator + "entity" + File.separator + className; entityImport = entityImport.replace(File.separator, "."); String daoPackageName = packageName + File.separator + "dao"; daoPackageName = daoPackageName.replace(File.separator, "."); String daoName = className + "Dao"; String daoPath = basePackage + File.separator + "dao"; File daoPackage = new File(daoPath); if (!daoPackage.exists()) daoPackage.mkdir(); String daoFileName = daoPath + File.separator + daoName + ".java"; File daoFile = new File(daoFileName); if (daoFile.exists()) return; try { BufferedWriter out = new BufferedWriter(new FileWriter(daoFile)); out.write("package " + daoPackageName + ";"); out.newLine(); out.newLine(); out.write("import " + entityImport + ";"); out.newLine(); out.write("import " + BASE_DAO_NAME + ";"); out.newLine(); out.newLine(); out.write("public interface " + daoName + " extends BaseDao<" + className + "> {"); out.newLine(); out.newLine(); out.write("}"); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 生成daoImpl层代码 */ private void generatorDaoImpl(String className) { String entityImport = packageName + File.separator + "entity" + File.separator + className; entityImport = entityImport.replace(File.separator, "."); String daoImplPackageName = packageName + File.separator + "dao" + File.separator + "impl"; daoImplPackageName = daoImplPackageName.replace(File.separator, "."); String daoName = className + "Dao"; String daoImport = packageName + File.separator + "dao" + File.separator + daoName; daoImport = daoImport.replace(File.separator, "."); String daoImplName = daoName + "Impl"; String daoImplPath = basePackage + File.separator + "dao" + File.separator + "impl"; File daoImplPackage = new File(daoImplPath); if (!daoImplPackage.exists()) daoImplPackage.mkdir(); String daoImplFileName = daoImplPath + File.separator + daoImplName + ".java"; File daoFile = new File(daoImplFileName); if (daoFile.exists()) return; try { BufferedWriter out = new BufferedWriter(new FileWriter(daoFile)); out.write("package " + daoImplPackageName + ";"); out.newLine(); out.newLine(); out.write("import org.springframework.stereotype.Repository;"); out.newLine(); out.newLine(); out.write("import " + entityImport + ";"); out.newLine(); out.write("import " + daoImport + ";"); out.newLine(); out.write("import " + BASE_DAO_IMPL_NAME + ";"); out.newLine(); out.newLine(); out.write("@Repository(\"" + toLowCase(daoName) + "\")"); out.newLine(); out.write("public class " + daoImplName + " extends BaseDaoImpl<" + className + "> implements " + daoName + " {"); out.newLine(); out.newLine(); out.write("}"); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 生成service层代码 */ private void generatorService(String className) { String entityImport = packageName + File.separator + "entity" + File.separator + className; entityImport = entityImport.replace(File.separator, "."); String servicePackageName = packageName + File.separator + "service"; servicePackageName = servicePackageName.replace(File.separator, "."); String daoName = className + "Dao"; String daoImport = packageName + File.separator + "dao" + File.separator + daoName; daoImport = daoImport.replace(File.separator, "."); String serviceName = className + "Service"; String servicePath = basePackage + File.separator + "service"; File servicePackage = new File(servicePath); if (!servicePackage.exists()) servicePackage.mkdir(); String serviceFileName = servicePath + File.separator + serviceName + ".java"; File daoFile = new File(serviceFileName); if (daoFile.exists()) return; try { BufferedWriter out = new BufferedWriter(new FileWriter(daoFile)); out.write("package " + servicePackageName + ";"); out.newLine(); out.newLine(); out.write("import org.springframework.stereotype.Service;"); out.newLine(); out.write("import org.springframework.transaction.annotation.Propagation;"); out.newLine(); out.write("import org.springframework.transaction.annotation.Transactional;"); out.newLine(); out.write("import javax.annotation.Resource;"); out.newLine(); out.newLine(); out.write("import " + entityImport + ";"); out.newLine(); out.write("import " + daoImport + ";"); out.newLine(); out.write("import " + BASE_DAO_NAME + ";"); out.newLine(); out.write("import " + BASE_SERVICE_IMPL_NAME + ";"); out.newLine(); out.newLine(); out.write("@Service(\"" + toLowCase(serviceName) + "\")"); out.newLine(); out.write("@Transactional(rollbackForClassName={\"java.lang.Exception\"}, propagation = Propagation.REQUIRED)"); out.newLine(); out.write("public class " + serviceName + " extends BaseServiceImpl<" + className + "> {"); out.newLine(); out.newLine(); out.write("\t@Resource"); out.newLine(); out.write("\tprivate " + daoName + " " + toLowCase(daoName) + ";"); out.newLine(); out.newLine(); out.write("\t@Override"); out.newLine(); out.write("\tprotected BaseDao <" + className + "> getDao() {"); out.newLine(); out.write("\t\treturn " + toLowCase(daoName) + ";"); out.newLine(); out.write("\t}"); out.newLine(); out.write("}"); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 获得工程所在硬盘路径 * * @return */ public String getProjectPath() { try { File directory = new File("");// 参数为空 String courseFile = directory.getCanonicalPath() + File.separator + PROJECT_NAME; return courseFile; } catch (IOException e) { return null; } } /** * 将首字母转为小写 * * @param content * @return */ private String toLowCase(String content) { content = content.substring(0, 1).toLowerCase() + content.substring(1); return content; } public String getBasePackage() { return basePackage; }}阅读全文
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