【SpringBoot】又写了一份新瓶装旧酒的CRUD程序

SpringBoot版本：2.5.4

后台数据库：Oracle11g

访问数据库：MyBatis

例程下载：https://files.cnblogs.com/files/heyang78/redisCache_crud_oracle_mybatis_0925.rar

Pom.xml中配置：

        <!-- Spring MyBatis Support -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.0</version>
        </dependency>
        
        <!-- Oracle Support -->
        <dependency>
            <groupId>com.oracle.database.nls</groupId>
            <artifactId>orai18n</artifactId>
        </dependency>

        <dependency>
            <groupId>com.oracle.database.jdbc</groupId>
            <artifactId>ojdbc8</artifactId>
            <scope>runtime</scope>
        </dependency>

application-dev.yml中数据库配置：

server:
    port: 8080
myenv:
    name: '开发环境'   
spring: 
    datasource:
        url: jdbc:oracle:thin:@127.0.0.1:1521:orclhy
        username: luna
        password: 1234
        driver-class-name: oracle.jdbc.OracleDriver

访问数据库的Mapper类：

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

@Mapper
public interface EmpMapper {
    @Select("select * from emp where id=#{id}")
    Emp findById(@Param("id") long id);
    
    @Insert("insert into emp(id,name,age) values(#{id},#{name},#{age})")
    int hireEmp(@Param("id") long id,@Param("name") String name,@Param("age") int age);
    
    @Delete("delete from emp where id=#{id}")
    int fireEmp(@Param("id") long id);
    
    @Update("Update emp set name=#{name},age=#{age} where id=#{id}")
    int modifyEmp(@Param("id") long id,@Param("name") String name,@Param("age") int age);
    
    @Select("select * from emp where name like #{name} ")
    List<Emp> searchByName(@Param("name") String name);
}

和外界交互的控制器类：

package com.hy.myapp;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class JsonCtrl {
    @Resource
    private EmpMapper eMper;
    
    /**
     * 按名称查找一堆雇员
     * @param name
     * @return
     */
    @RequestMapping(value="/searchEmpsByName", method=RequestMethod.GET)
    public List<Emp> searchEmpsByName(@ModelAttribute(value="name") String name) {
        List<Emp> emps=eMper.searchByName("%"+name+"%");
        return emps;
    }
    
    /**
     * 更改一个雇员信息
     * @param id
     * @param name
     * @param age
     * @return
     */
    @RequestMapping(value="/modifyEmp", method=RequestMethod.POST)
    public String modifyEmp(@ModelAttribute(value="id") long id,
                         @ModelAttribute(value="name") String name,
                         @ModelAttribute(value="age") int age) {
        int retval=eMper.modifyEmp(id, name, age);
        
        if(retval==1) {
            return "successful";
        }else {
            return "failed";
        }
    }
    
    /**
     * 删除一个雇员
     * @param id
     * @return
     */
    @RequestMapping(value="/fireEmp", method=RequestMethod.DELETE)
    public String fireEmp(@ModelAttribute(value="id") long id) {
        int retval=eMper.fireEmp(id);
        
        if(retval==1) {
            return "successful";
        }else {
            return "failed";
        }
    }
    
    /**
     * 增加一个雇员
     * @param id
     * @param name
     * @param age
     * @return
     */
    @RequestMapping(value="/hireEmp", method=RequestMethod.POST)
    public String hireEmp(@ModelAttribute(value="id") long id,
                         @ModelAttribute(value="name") String name,
                         @ModelAttribute(value="age") int age) {
        int retval=eMper.hireEmp(id, name, age);
        
        if(retval==1) {
            return "successful";
        }else {
            return "failed";
        }
    }
    
    /**
     * 按ID查找一个雇员
     * @param id
     * @return {"id":101,"name":"IOMCPELTEO","age":20}
     */
    @RequestMapping(value="/findEmpById", method=RequestMethod.GET)
    public Emp findEmpById(@ModelAttribute(value="id") long id) {
        Emp emp=eMper.findById(id);
        return emp;
    }
    
...
}

虽然又是个CRUD程序，但万丈高楼平地起。

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