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。

工程源代码下载：工程源代码