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思路:
1.配置每一层内容
2.在yml中配置mysql信息
3.在mapper中配置内容sql 返回内容设置成 java.util.HashMap，输入内容设置成string
4.在配置dao接口
5.可直接执行查询和修改都ok
java控制层类
/**
*控制成类
*/
@RestController
public class DeptController {
@Autowired
private UserServiceImpl userserver;
@RequestMapping(value="/getStrnew/{str}")
public String getStrnew(@PathVariable("str") String str){
String sql = "select * from dept";//查询sql
String sql2 = "insert into dept value('9','5','2')";//写入sql
userserver.selectBysql(sql2);//执行写入sql
List<Map<String,Object>> list = userserver.selectBysql(sql);//执行查询sql
for (int i = 0; i < list.size(); i++) {
String c = "";
for (Entry<String, Object> entry : list.get(i).entrySet()) {
c += entry.getKey()+"======"+String.valueOf(entry.getValue());
}
System.out.println(c);
}
return "8001ready" + str;
}
}service
public interface UserService {
public List<Map<String,Object>> selectBysql(String sql);
}
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao dao;
public List<Map<String,Object>> selectBysql(String sql){
return dao.selectBysql(sql);
}
}dao
@Mapper
public interface UserDao {
public List<Map<String,Object>> selectBysql(String sql);
}
mapper.xml
<?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.supermap.provider.dao.UserDao">
<select id="selectBysql" parameterType="java.lang.String" resultType="java.util.HashMap">
${value}
</select>
</mapper>.yml
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml
type-aliases-package: com.supermap.vo
mapper-locations: classpath:mybatis/mapper/**/*.xml
spring:
application:
name: supermap-dept
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: org.gjt.mm.mysql.Driver
url: jdbc:mysql://localhost:3306/zkdb
username: zkjdkd
password: zkdkjdk
dbcp2:
min-idle: 5
initial-size: 5
max-total: 5
max-wait-millis: 200