上图是
BeetlSQL官网中对BeetlSQL的介绍，简单来说我们可以得到几个点
- 开发效率高
- 维护性好
- 性能数倍于JPA MyBatis
关于BeetlSQL的更多介绍大家可以去到官网去看看，接下来我们来看看如何把这个DAO工具整合到项目中
pom.xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入beetlsql -->
<dependency>
<groupId>com.ibeetl</groupId>
<artifactId>beetlsql</artifactId>
<version>2.10.34</version>
</dependency>
<!-- 引入beetl -->
<dependency>
<groupId>com.ibeetl</groupId>
<artifactId>beetl</artifactId>
<version>2.9.3</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
sql文件，我这里用的是mysql
CREATE TABLE `test`.`Untitled` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`age` int(11) NULL DEFAULT 18,
`cdate` timestamp(0) NULL DEFAULT CURRENT_TIMESTAMP(0),
`udate` timestamp(0) NULL DEFAULT CURRENT_TIMESTAMP(0),
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
User.java
package com.priv.gabriel.entity;
/**
* Created with Intellij IDEA.
*
* @Author: Gabriel
* @Date: 2018-10-14
* @Description:
*/
public class User {
private long id;
private String username;
private String nickname;
private int age;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", nickname='" + nickname + '\'' +
", age=" + age +
'}';
}
}
在这里有两个分支，一种是通过sqlManager来操作，另一种是整合mapper，在这里我们现看看第一种方式
SQLManager方式
UserControllerForSQLManager.java
package com.priv.gabriel.controller;
import com.priv.gabriel.entity.User;
import com.priv.gabriel.repository.UserRepository;
import org.beetl.sql.core.SQLManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* Created with Intellij IDEA.
*
* @Author: Gabriel
* @Date: 2018-10-14
* @Description:
*/
@RestController
@RequestMapping("/sqlManager/users")
public class UserControllerForSQLManager {
//自动注入即可
@Autowired
private SQLManager sqlManager;
/*
* @Author Gabriel
* @Description 根据主键查找记录
* @Date 2018/10/16
* @Param [id] 主键
* @Return void
*/
@RequestMapping(value = "/{id}",method = RequestMethod.GET)
public User selectUserById(@PathVariable("id")int id){
//如果没有查到数据则抛出异常
//return sqlManager.unique(User.class,id);
//如果没有查到数据则返回null
return sqlManager.single(User.class,id);
}
/*
* @Author Gabriel
* @Description 查询所有
* @Date 2018/10/16
* @Param []
* @Return java.util.List<com.priv.gabriel.entity.User>*/
@RequestMapping(value = {"","/"},method = RequestMethod.GET)
public List<User> getUsers(){
//获取所有数据
//return sqlManager.all(User.class);
//查询该表的总数
//return sqlManager.allCount(User.class);
//获取所有数据 分页方式
return sqlManager.all(User.class,1,2);
}
/*
* @Author Gabriel
* @Description 单表条件查询
* @Date 2018/10/16
* @Param []
* @Return void*/
public void singletonTableQuery(){
//通过sqlManager.query()可以在后面追加各种条件
sqlManager.query(User.class).andLike("username","admin").orderBy("age").select();
}
/*
* @Author Gabriel
* @Description 新增数据
* @Date 2018/10/16
* @Param [user]
* @Return void*/
@RequestMapping(value = {"","/"},method = RequestMethod.POST)
public void addUser(User user){
//添加数据到对应表中
//sqlManager.insert(User.class,user);
//添加数据到对应表中，并返回自增id
sqlManager.insertTemplate(user,true);
System.out.println(user.getId());
System.out.println("新增成功");
}
/*
* @Author Gabriel
* @Description 根据主键修改
* @Date 2018/10/16
* @Param [user]
* @Return java.lang.String*/
@RequestMapping(value = {"","/"},method = RequestMethod.PUT)
public String updateById(User user){
//根据id修改，所有值都参与更新
//sqlManager.updateById(user);
//根据id修改,属性为null的不会更新
if(sqlManager.updateTemplateById(user)>0){
return "修改成功";
}else{
return "修改失败";
}
}
/*
* @Author Gabriel
* @Description 删除记录
* @Date 2018/10/16
* @Param [id]
* @Return java.lang.String*/
@RequestMapping(value = "/id",method = RequestMethod.DELETE)
public String deleteById(@PathVariable("id") int id){
if(sqlManager.deleteById(User.class,id) >0 ){
return "删除成功";
}else{
return "删除失败";
}
}
}
Mapper方式
如果要使用mapper方式，则需要新建一个mapper接口，并继承BaseMapper<T>
UserRepository.java
package com.priv.gabriel.repository;
import com.priv.gabriel.entity.User;
import org.beetl.sql.core.mapper.BaseMapper;
/**
* Created with Intellij IDEA.
*
* @Author: Gabriel
* @Date: 2018-10-14
* @Description:
*/
public interface UserRepository extends BaseMapper<User>{
}
UserControllerForMapper.java
package com.priv.gabriel.controller;
import com.priv.gabriel.entity.User;
import com.priv.gabriel.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* Created with Intellij IDEA.
*
* @Author: Gabriel
* @Date: 2018-10-14
* @Description:
*/
@RestController
@RequestMapping("/mapper/users")
public class UserControllerForMapper {
@Autowired
private UserRepository repository;
@RequestMapping(value = {"","/"},method = RequestMethod.POST)
public void addUser(User user){
repository.insert(user);
}
@RequestMapping(value = {"","/"},method = RequestMethod.DELETE)
public String deleteUserById(User user){
if(repository.deleteById(user) >0 ){
return "删除成功";
}else{
return "删除失败";
}
}
@RequestMapping(value = {"","/"},method = RequestMethod.PUT)
public String updateUserById(User user){
//repository.updateById(user)
if(repository.deleteById(user) > 0){
return "修改成功";
}else{
return "修改失败";
}
}
@RequestMapping(value = "/{id}",method = RequestMethod.GET)
public User selectUserById(@PathVariable("id")int id){
//repository.unique(id);
return repository.single(id);
}
@RequestMapping(value = {"","/"},method = RequestMethod.GET)
public List<User> getUsers(){
//repository.all(1,2);
//repository.allCount();
return repository.all();
}
}
两种方式都介绍完毕了，但是BeetlSQL的重点部分还不在这，BeetlSQL的重点是可以创建一个SQL模板，到这大家可能会想，不就是个xml嘛，mybatis就有呀，不一样的地方就在这了，BeetlSQL的SQL模板是这样的
selectByTest
===
select * from user where 1=1
怎么样，是不是眼前一亮，很明显 selectByTest 是这条SQL语句的id , ===的作用是代表id和内容的分割，而最后的部分当然就是SQL语句啦
然后简单介绍一下调用SQL模板的方式
SQLManager方式
@RequestMapping(value = "/test",method = RequestMethod.GET)
public List<User> getUsersByTest(){
return sqlManager.select("user.selectByTest",User.class);
}
在SQLManager的方式中，通过sqlManager.select("模板id"，类型)的方式直接调用
Mapper的方式
@SqlResource("user")
public interface UserRepository extends BaseMapper<User>{
List<User> selectByTest();
}
在Mapper的方式，需要先建立一个xxx.md的SQL模板文件,通过@SqlResource(模板文件名)这个注解找到模板文件，再在mapper中写入与模板文件中同名的方法，即可在外部调用
注意，BeetlSQL的模板文件位置默认在resource/sql/xxx.md中，好啦，关于BeetlSQL的介绍就到这里。
BeetlSQL的详细介绍
Beetl官方文档
BeetlSQL官方文档
项目点此下载
