ssm框架下的文件自动生成模板(简单方便)
作者:互联网
每次建立ssm项目的时候都需要自己去创建一堆文件,这里介绍两个方法来节省我们的时间
一、用文件流的方式来根据pojo来自动生成dao层、service层的代码
模板中都是最常用的增删改查的方法,不是固定的格式的用[名字]替换,比如[className]为类名,[idao]为接口名;
dao层接口:
package com.dao;
import com.pojo.[className];
import java.util.List;
public interface [idao] {
List<[className]> list([className] [objectName]);
int add([className] [objectName]);
[className] getById(Integer id);
int update([className] [objectName]);
int del(int id);
int batchdel(Integer[] ids);
}
service接口:
package com.service;
import com.pojo.[className];
import java.util.List;
public interface [iservice] {
List<[className]> list([className] [objectName]);
int add([className] [objectName]);
Timi getById(Integer id);
int update([className] [objectName]);
int del(int id);
int batchdel(Integer[] ids);
}
service实现类:
package com.service.impl;
import com.dao.[idao];
import com.pojo.[className];
import com.service.[iservice];
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
@Service
public class [serviceimpl] implements [iservice] {
@Resource
[idao] [objectName]Dao;
@Override
public List<[className]> list([className] [objectName]) {
return [objectName]Dao.list([objectName]);
}
@Override
public int add([className] [objectName]) {
return [objectName]Dao.add([objectName]);
}
@Override
public [className] getById(Integer id) {
return [objectName]Dao.getById(id);
}
@Override
public int update([className] [objectName]) {
return [objectName]Dao.update([objectName]);
}
@Override
public int del(int id) {
return [objectName]Dao.del(id);
}
@Override
public int batchdel(Integer[] ids) {
return [objectName]Dao.batchdel(ids);
}
}
mapper:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dao.[idao]">
<sql id="basequery">
select [select] from [tablename]
</sql>
<select id="list" resultType="[className]" parameterType="[className]">
<include refid="basequery"></include>
<where>
</where>
</select>
<insert id="add" parameterType="[className]" >
insert into [tablename]([insertlist]) values([insertpro])
</insert>
<select id="getById" resultType="[className]" parameterType="java.lang.Integer">
<include refid="basequery"></include>
where id = #{id}
</select>
<update id="update" parameterType="[className]">
update [tablename]
set
[setlist]
where id = #{id}
</update>
<delete id="del" parameterType="java.lang.Integer">
delete from [tablename] where id=#{id}
</delete>
<delete id="batchdel" >
delete from [tablename] where id in
<foreach collection="array" item="item" separator="," open="(" close=")">
#{item}
</foreach>
</delete>
</mapper>
1、首先搭建出基本的ssm框架(见之前的博客)
2、写一个测试类,用来生成文件,代码如下
public class MyTest {
//根据pojo和目录生成相关名字
//分别是基础路径、类的名字、对象名、dao接口完全限定名等,user.dir是项目路径
static String basepath=System.getProperty("user.dir")+"/src/main/java/com/";
static String className = "Timi";
static String objectName =className.substring(0,1).toLowerCase()+className.substring(1);
static String idao=className+"Dao";
static String iservice =className+"Service";
static String serviceimpl=iservice+"Impl";
static String mapperpath=System.getProperty("user.dir")+"/src/main/resources/";
//通过主函数来创建四个文件
public static void main(String[] args) throws IOException, ClassNotFoundException {
createidao();
createiservice();
createserviceimpl();
createmapper();
}
//创建dao接口
public static void createidao() throws IOException {
File file=new File(basepath+"dao/"+idao+".java");
if(file.exists()){
System.out.println("dao接口文件已存在");
}
else{
file.createNewFile();
System.out.println("dao接口创建完成");
//读取模板转字符串
File temp =new File(basepath+"/template/daotemplate.tmp");
String str= FileUtils.readFileToString(temp);
//替换关键字并写入正确的路径
String code=str.replaceAll("\\[className]",className)
.replaceAll("\\[objectName]",objectName)
.replaceAll("\\[idao]",idao);
FileUtils.writeStringToFile(file,code);
}
}
//创建service接口,原理和idao一样
public static void createiservice() throws IOException {
File file=new File(basepath+"service/"+iservice+".java");
if(file.exists()){
System.out.println("service接口文件已存在");
}
else{
file.createNewFile();
System.out.println("service接口创建完成");
File temp =new File(basepath+"/template/servicetemplate.tmp");
String str= FileUtils.readFileToString(temp);
String code=str.replaceAll("\\[className]",className)
.replaceAll("\\[objectName]",objectName)
.replaceAll("\\[iservice]",iservice);
FileUtils.writeStringToFile(file,code);
}
}
public static void createserviceimpl() throws IOException {
File file=new File(basepath+"service/impl/"+serviceimpl+".java");
if(file.exists()){
System.out.println("service实现类文件已存在");
}
else{
file.createNewFile();
System.out.println("service实现类创建完成");
File temp =new File(basepath+"/template/serviceimpltemplate.tmp");
String str= FileUtils.readFileToString(temp);
String code=str.replaceAll("\\[className]",className)
.replaceAll("\\[objectName]",objectName)
.replaceAll("\\[iservice]",iservice)
.replaceAll("\\[serviceimpl]",serviceimpl)
.replaceAll("\\[idao]",idao);
FileUtils.writeStringToFile(file,code);
}
}
//逻辑比较复杂就是mapper文件的自动生成
public static void createmapper() throws IOException, ClassNotFoundException {
File file=new File(mapperpath+"com/dao/"+idao+".xml");
if(file.exists()){
System.out.println("mapper文件已存在");
}
else{
file.createNewFile();
System.out.println("mapper文件创建完成");
File temp =new File(basepath+"/template/mapper.tmp");
String str= FileUtils.readFileToString(temp);
Class clz=null;
String tablename="";
//创建四个list分别存放查、增加的数据库字段、增加的属性字段和修改的字段
List<String> select=new ArrayList<String>();
List<String> insertlist=new ArrayList<String>();
List<String> insertpro=new ArrayList<String>();
List<String> setlist=new ArrayList<String>();
try{
//通过反射获取类的对象
clz=Class.forName("com.pojo."+className);
//先判断对象是否有注解,来防止数据库名和对象名不一致
if(clz.isAnnotationPresent(tab.class)){
tablename= ((tab) clz.getAnnotation(tab.class)).value();
}
else{
tablename=objectName;
}
Field[] field=clz.getDeclaredFields();
//遍历属性名防止字段和属性不一致,如果不一直就用别名,比如数据库为user_id,属性为userId
for(Field fe:field){
String in="";
String se="";
if(fe.isAnnotationPresent(colume.class)){
colume clu=fe.getAnnotation(colume.class);
se=clu.value()+" as "+fe.getName();
in=clu.value();
}
else{
se=fe.getName();
in=fe.getName();
}
select.add(se);
if(!fe.isAnnotationPresent(id.class)){
insertlist.add(in);
insertpro.add("#{"+fe.getName()+"}");
setlist.add(in+"=#{"+fe.getName()+"}");
}
}
}catch(ClassNotFoundException e){
e.printStackTrace();
}
//sql语句和关键词替换
String code=str.replaceAll("\\[idao]",idao)
.replaceAll("\\[select]",select.toString().replaceAll("\\[","").replaceAll("\\]",""))
.replaceAll("\\[tablename]",tablename)
.replaceAll("\\[insertlist]",insertlist.toString().replaceAll("\\[","").replaceAll("\\]",""))
.replaceAll("\\[insertpro]",insertpro.toString().replaceAll("\\[","").replaceAll("\\]",""))
.replaceAll("\\[setlist]",setlist.toString().replaceAll("\\[","").replaceAll("\\]",""))
.replaceAll("\\[className]",className);
FileUtils.writeStringToFile(file,code);
}
}
}
生成后的文件代码如图:
创建完就可以在controller中直接用了。
二、web生成器
随着发展,有一个团队研发了自动生成代码的工具,使开发更加方便,步骤如下:
1、奥
2、利
3、给
标签:className,框架,objectName,ssm,replaceAll,File,id,模板,String 来源: https://www.cnblogs.com/aabbc6/p/13547632.html