基于HibernateTemplate的dao和service文件的自动生成

  继续上一篇文章中讲到企业中使用hibernate的时候，都会采用BaseDao和HibernateBaseDao的继承结构来实现所有实体通用增删改查的基本操作的实现，功能图还是如下：

                 

这样实现之后我们每次操作一个实体都要写实体的bean文件，dao接口文件，dao的实现文件，service接口文件，service实现的文件，对于所有实体的通用操作而言，五个文件每次在创建实体之后都是我们需要创建的，而且它们的实现格式也基本相同，所以我们可以专门针对此完成java工具类，来自动根据bean生成其它文件的代码，并放入到相应的包中，这样简化的开发操作。

首先新建一个工程，首先根据需要创建好通用的BaseDao 和HibernateBaseDao两个类 ，整理好工程的src下的文件结构如下：

然后创建一个User的实体，之后根据User实体调用生成代码的工具类，运行可以看到自动生成的文件：

这样就可以用来作为我们的辅助开发，生成dao文件的工具类代码：

package edu.hue.jk.utils;import java.io.File;import java.io.PrintWriter;import edu.hue.jk.baseDao.BaseDao;import edu.hue.jk.baseDaoHibernate.BaseDaoHibernate;public class GenarateDaoCodeUtil {private static final String ipt="import";private static final String pkg="package";private static final String base="BaseDao";private static final String blank=" ";private static final String changeRow=";\n";private static final String change="\n";private static final String pub="public";private static final String intf="interface";private static final String extd="extends";private static final String impl="implements";private static final String cls="class";private static final String repository="org.springframework.stereotype.Repository";@SuppressWarnings("rawtypes")private Class classzy;  //bean的类@SuppressWarnings("rawtypes")public GenarateDaoCodeUtil(Class classzy) {super();this.classzy = classzy;}//得到存放BaseDao的全路劲public String getBaseDaoPkg(){return BaseDao.class.getName();}//得到BaseDaoHibernate的全路勁public String getBaseDaoHibernatePkg(){return BaseDaoHibernate.class.getName();}//得到bean的全路径public String getBeanPkg(){return classzy.getName();}//得到Dao的名称public String getDaoName(){String daoName=classzy.getSimpleName();return daoName+"Dao";}//得到存放dao文件的包名public String getPkgName(){String beanPrefix=classzy.getName();String beanP= beanPrefix.substring(0, beanPrefix.lastIndexOf("."));String daoPkg=beanP.substring(0,beanP.lastIndexOf("."));return daoPkg+".dao";}//得到Dao文件路劲public String getDaoFilePath() throws Exception{String files[]=getPkgName().split("[.]");StringBuffer stringBuffer=new StringBuffer("src");for(String s:files){stringBuffer.append("/"+s);}String daoPath=stringBuffer.append("/"+getDaoName()).toString()+".java";return daoPath;}//得到dao文件的内容public String getDaoContent(){StringBuffer content=new StringBuffer();content.append(pkg+blank+getPkgName()+changeRow);content.append(ipt+blank+getBaseDaoPkg()+changeRow);content.append(ipt+blank+getBeanPkg()+changeRow);content.append(pub+blank+intf+blank+getDaoName()+blank+extd+blank+base+"<"+classzy.getSimpleName()+">{"+change);content.append(change+"}"+change);return content.toString();}//生成dao文件public void generateDaoFile() throws Exception{String daoPath=getDaoFilePath();String content=getDaoContent();File daoFile=new File(daoPath);PrintWriter out=new PrintWriter(daoFile);out.print(content);out.flush();out.close();}// 得到daoImpl的名称public String getDaoImplName(){String daoName=classzy.getSimpleName();return daoName+"DaoImpl";}//得到存放daoImpl文件的包名public String getDaoImplPkgName(){String beanPrefix=classzy.getName();String beanP= beanPrefix.substring(0, beanPrefix.lastIndexOf("."));String daoPkg=beanP.substring(0,beanP.lastIndexOf("."));return daoPkg+".daoImpl";}//得到DaoImpl文件路劲public String getDaoImplFilePath() throws Exception{String files[]=getDaoImplPkgName().split("[.]");StringBuffer stringBuffer=new StringBuffer("src");for(String s:files){stringBuffer.append("/"+s);}String daoPath=stringBuffer.append("/"+getDaoImplName()).toString()+".java";return daoPath;}//得到daoImpl文件的内容public String getDaoImplContent(){StringBuffer content=new StringBuffer();content.append(pkg+blank+getDaoImplPkgName()+changeRow);content.append(ipt+blank+repository+changeRow);content.append(ipt+blank+getBaseDaoHibernatePkg()+changeRow);content.append(ipt+blank+getBeanPkg()+changeRow);content.append(ipt+blank+getPkgName()+"."+getDaoName()+changeRow);//使用spring 註解  首字母小寫content.append("@Repository("+"\""+getDaoName().substring(0,1).toLowerCase()+getDaoName().substring(1)+"\")"+change);content.append(pub+blank+cls+blank+getDaoImplName()+blank+extd+blank+"BaseDaoHibernate<"+classzy.getSimpleName()+">"+impl+blank+getDaoName()+"{"+change);content.append(change+"}"+change);return content.toString();}//生成daoImpl文件public void generateDaoImplFile() throws Exception{String daoPath=getDaoImplFilePath();String content=getDaoImplContent();File daoFile=new File(daoPath);PrintWriter out=new PrintWriter(daoFile);out.print(content);out.flush();out.close();}}

生成service文件的工具类代码：

package edu.hue.jk.utils;import java.io.File;import java.io.PrintWriter;public class GenarateServiceCodeUtil {private static final String ipt="import";private static final String pkg="package";private static final String blank=" ";private static final String changeRow=";\n";private static final String change="\n";private static final String split=",";private static final String tab="    ";private static final String pub="public";private static final String pri="private";private static final String intf="interface";private static final String impl="implements";private static final String cls="class";private static final String list="java.util.List";private static final String serializable="java.io.Serializable";private static final String resource="javax.annotation.Resource";private static final String autowired="org.springframework.beans.factory.annotation.Autowired";private static final String service="org.springframework.stereotype.Service";private static final String left_1="{";private static final String right_1="}";private static final String left_2="(";private static final String right_2=")";private static final String left_3="<";private static final String right_3=">";@SuppressWarnings("rawtypes")private Class classzy;  //bean的类@SuppressWarnings("rawtypes")public GenarateServiceCodeUtil(Class classzy) {super();this.classzy = classzy;}//得到bean的全路径public String getBeanPkg(){return classzy.getName();}//得到bean的名字public String getBeanName(){return classzy.getSimpleName();}//將bean的名字首字母小寫，用來作為变量名public String getBeanAsVariable(){return getBeanName().substring(0, 1).toLowerCase()+getBeanName().substring(1);}//得到service的名称public String getServiceName(){String daoName=classzy.getSimpleName();return daoName+"Service";}//得到service名称作为变量名public String getServiceNameAsVariable(){String serviceName=getServiceName();return serviceName.substring(0, 1).toLowerCase()+serviceName.substring(1);}//得到存放service文件的包名public String getServicePkgName(){String beanPrefix=classzy.getName();String beanP= beanPrefix.substring(0, beanPrefix.lastIndexOf("."));String daoPkg=beanP.substring(0,beanP.lastIndexOf("."));return daoPkg+".service";}//得到Service文件路劲public String getServiceFilePath() throws Exception{String files[]=getServicePkgName().split("[.]");StringBuffer stringBuffer=new StringBuffer("src");for(String s:files){stringBuffer.append("/"+s);}String daoPath=stringBuffer.append("/"+getServiceName()).toString()+".java";return daoPath;}//得到Service文件的内容public String getServiceContent(){StringBuffer content=new StringBuffer();content.append(pkg+blank+getServicePkgName()+changeRow);content.append(ipt+blank+serializable+changeRow);content.append(ipt+blank+list+changeRow);content.append(ipt+blank+getBeanPkg()+changeRow);content.append(pub+blank+intf+blank+getServiceName()+blank+left_1+change);content.append(change);content.append(tab+getBeanName()+blank+"get"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+split+"Serializable"+blank+"id"+right_2+changeRow);content.append(change);content.append(tab+getBeanName()+blank+"save"+left_2+getBeanName()+blank+getBeanAsVariable()+right_2+changeRow);content.append(change);content.append(tab+"void"+blank+"update"+left_2+getBeanName()+blank+getBeanAsVariable()+right_2+changeRow);content.append(change);content.append(tab+"void"+blank+"delete"+left_2+getBeanName()+blank+getBeanAsVariable()+right_2+changeRow);content.append(change);content.append(tab+"void"+blank+"delete"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+split+"Serializable"+blank+"id"+right_2+changeRow);content.append(change);content.append(tab+"List"+left_3+getBeanName()+right_3+blank+"findAll"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+right_2+changeRow);content.append(change);content.append(tab+"long"+blank+"getCount"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+right_2+changeRow);content.append(change);content.append(change);content.append(tab+"List"+left_3+getBeanName()+right_3+blank+"getEntityPage"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+",int "+"pageNo,"+"int "+"pageSize"+right_2+changeRow);content.append(right_1);return content.toString();}//生成service文件public void generateServiceFile() throws Exception{String daoPath=getServiceFilePath();String content=getServiceContent();File daoFile=new File(daoPath);PrintWriter out=new PrintWriter(daoFile);out.print(content);out.flush();out.close();}// 得到serviceImpl的名称public String getServiceImplName(){String daoName=classzy.getSimpleName();return daoName+"ServiceImpl";}//得到存放serviceImpl文件的包名public String getServiceImplPkgName(){String beanPrefix=classzy.getName();String beanP= beanPrefix.substring(0, beanPrefix.lastIndexOf("."));String daoPkg=beanP.substring(0,beanP.lastIndexOf("."));return daoPkg+".serviceImpl";}//得到ServiceImpl文件路劲public String getServiceImplFilePath() throws Exception{String files[]=getServiceImplPkgName().split("[.]");StringBuffer stringBuffer=new StringBuffer("src");for(String s:files){stringBuffer.append("/"+s);}String daoPath=stringBuffer.append("/"+getServiceImplName()).toString()+".java";return daoPath;}//得到Dao的名称public String getDaoName(){String daoName=classzy.getSimpleName();return daoName+"Dao";}private String getDaoNameAsVariable() {String daoName=getDaoName();return daoName.substring(0, 1).toLowerCase()+daoName.substring(1);}//得到存放dao文件的包名public String getDaoPkgName(){String beanPrefix=classzy.getName();String beanP= beanPrefix.substring(0, beanPrefix.lastIndexOf("."));String daoPkg=beanP.substring(0,beanP.lastIndexOf("."));return daoPkg+".dao";}//得到serviceImpl文件的内容public String getServiceImplContent(){StringBuffer content=new StringBuffer();content.append(pkg+blank+getServiceImplPkgName()+changeRow);content.append(ipt+blank+serializable+changeRow);content.append(ipt+blank+list+changeRow);content.append(ipt+blank+autowired+changeRow);content.append(ipt+blank+service+changeRow);content.append(ipt+blank+resource+changeRow);content.append(ipt+blank+getBeanPkg()+changeRow);content.append(ipt+blank+getDaoPkgName()+"."+getDaoName()+changeRow);content.append(ipt+blank+getServicePkgName()+"."+getServiceName()+changeRow);content.append("@Service"+left_2+"\""+getServiceNameAsVariable()+"\""+right_2+change);content.append(pub+blank+cls+blank+getServiceImplName()+blank+impl+blank+getServiceName()+"{"+change);content.append(tab+"@Autowired"+change);content.append(tab+"@Resource(name="+"\""+getBeanAsVariable()+"\")"+change);content.append(tab+pri+blank+getDaoName()+blank+getDaoNameAsVariable()+changeRow);content.append(tab+"@Override"+change);content.append(tab+pub+blank+getBeanName()+blank+"get"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+split+"Serializable"+blank+"id"+right_2+"{"+change);content.append(tab+tab+"return "+getDaoNameAsVariable()+".get"+left_2+"entityClazzy"+split+"id"+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+getBeanName()+blank+"save"+left_2+getBeanName()+blank+getBeanAsVariable()+right_2+"{"+change);content.append(tab+tab+"return "+getDaoNameAsVariable()+".save"+left_2+getBeanAsVariable()+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+"void"+blank+"update"+left_2+getBeanName()+blank+getBeanAsVariable()+right_2+"{"+change);content.append(tab+tab+getDaoNameAsVariable()+".update"+left_2+getBeanAsVariable()+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+"void"+blank+"delete"+left_2+getBeanName()+blank+getBeanAsVariable()+right_2+"{"+change);content.append(tab+tab+getDaoNameAsVariable()+".delete"+left_2+getBeanAsVariable()+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+"void"+blank+"delete"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+split+"Serializable"+blank+"id"+right_2+"{"+change);content.append(tab+tab+getDaoNameAsVariable()+".delete"+left_2+"entityClazzy,id"+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+"List"+left_3+getBeanName()+right_3+blank+"findAll"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+right_2+"{"+change);content.append(tab+tab+"return "+getDaoNameAsVariable()+".findAll"+left_2+"entityClazzy"+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+"long"+blank+"getCount"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+right_2+"{"+change);content.append(tab+tab+"return "+getDaoNameAsVariable()+".getCount"+left_2+"entityClazzy"+right_2+changeRow);content.append(tab+"}"+change);content.append(change);content.append(tab+"@Override"+change);content.append(tab+pub+blank+"List"+left_3+getBeanName()+right_3+blank+"getEntityPage"+left_2+"Class"+left_3+getBeanName()+right_3+blank+"entityClazzy"+",int "+"pageNo,"+"int "+"pageSize"+right_2+"{"+change);content.append(tab+tab+"return "+getDaoNameAsVariable()+".getEntityPage"+left_2+"entityClazzy,pageNo,pageSize"+right_2+changeRow);content.append(tab+"}"+change);content.append(change+"}"+change);return content.toString();}//生成daoImpl文件public void generateServiceImplFile() throws Exception{String daoPath=getServiceImplFilePath();String content=getServiceImplContent();File daoFile=new File(daoPath);PrintWriter out=new PrintWriter(daoFile);out.print(content);out.flush();out.close();}}

这样如果我们的bean采用pdm导入自动生成，然后再使用工具类自动生成dao和service文件，便可以大大的提高开发效率。

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