Mybatis（7）：将传参封装为Map进行传递

最新推荐文章于 2024-09-07 16:04:55 发布

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本文详细介绍使用MyBatis框架实现数据库操作的过程：包括定义实体类、创建接口、编写映射SQL、配置全局文件及单元测试。通过实例展示如何利用Map进行参数传递。

四部曲：

1.写接口 + 2.写映射sql + 3.把mapper注册到mybatis的配置文件 + 4.写单元测试和运行

（1）首先新建一个User.java文件，作为这次的实体类，注意一定要有setter方法（mybatis通过setter访问器进行读取）：

package com.smbms.entities;

import java.util.Date;
import java.util.List;

public class User {
	private Integer id;
	private String userCode;
	private String userName;
	private String userPassword;
	private Integer gender;
	private Date birthday;
	private String phone;
	private String address ;
	private Integer userRole;
	private Integer createdBy;
	private Date creationDate;
	private Integer modifyBy;
	private Date modifyDate;
	private String userRoleName;
	private Role role;
	private List<Address> addressList;
	
	
		
	public List<Address> getAddressList() {
		return addressList;
	}
	public void setAddressList(List<Address> addressList) {
		this.addressList = addressList;
	}
	public Role getRole() {
		return role;
	}
	public void setRole(Role role) {
		this.role = role;
	}
		public String getUserRoleName() {
		return userRoleName;
	}
	public void setUserRoleName(String userRoleName) {
		this.userRoleName = userRoleName;
	}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getUserCode() {
		return userCode;
	}
	public void setUserCode(String userCode) {
		this.userCode = userCode;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getUserPassword() {
		return userPassword;
	}
	public void setUserPassword(String userPassword) {
		this.userPassword = userPassword;
	}
	public Integer getGender() {
		return gender;
	}
	public void setGender(Integer gender) {
		this.gender = gender;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public Integer getUserRole() {
		return userRole;
	}
	public void setUserRole(Integer userRole) {
		this.userRole = userRole;
	}
	public Integer getCreatedBy() {
		return createdBy;
	}
	public void setCreatedBy(Integer createdBy) {
		this.createdBy = createdBy;
	}
	public Date getCreationDate() {
		return creationDate;
	}
	public void setCreationDate(Date creationDate) {
		this.creationDate = creationDate;
	}
	public Integer getModifyBy() {
		return modifyBy;
	}
	public void setModifyBy(Integer modifyBy) {
		this.modifyBy = modifyBy;
	}
	public Date getModifyDate() {
		return modifyDate;
	}
	public void setModifyDate(Date modifyDate) {
		this.modifyDate = modifyDate;
	}
	public User(Integer id, String userCode, String userName, String userPassword, Integer gender, Date birthday,
			String phone, String address, Integer userRole, Integer createdBy, Date creationDate, Integer modifyBy,
			Date modifyDate) {
		super();
		this.id = id;
		this.userCode = userCode;
		this.userName = userName;
		this.userPassword = userPassword;
		this.gender = gender;
		this.birthday = birthday;
		this.phone = phone;
		this.address = address;
		this.userRole = userRole;
		this.createdBy = createdBy;
		this.creationDate = creationDate;
		this.modifyBy = modifyBy;
		this.modifyDate = modifyDate;
	}
	public User() {
		super();
		// TODO 自动生成的构造函数存根
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", userCode=" + userCode + ", userName=" + userName + ", userPassword=" + userPassword
				+ ", gender=" + gender + ", birthday=" + birthday + ", phone=" + phone + ", address=" + address
				+ ", userRole=" + userRole + ", createdBy=" + createdBy + ", creationDate=" + creationDate
				+ ", modifyBy=" + modifyBy + ", modifyDate=" + modifyDate + "]";
	}
	
}

（2）写接口方法：

package com.smbms.dao;

import java.util.List;
import java.util.Map;

import org.apache.ibatis.annotations.Param;

import com.smbms.entities.User;

public interface UserMapper {

	public List<User> getUserListByMap(Map<String,String> userMap);

}

（3）定义映射文件的sql：

<?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.smbms.dao.UserMapper">

	
	<select id="getUserListByMap" resultType="com.smbms.entities.User" parameterType="map">
		select * from smbms_user where username=#{uName} and userRole=#{uRole}
	</select>

	
 </mapper>

（4）在全局配置文件中注册：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
 PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
 "http://mybatis.org/dtd/mybatis-3-config.dtd" >
 <configuration>
 	<properties resource="datasources.properties"/>
 	<settings>
 		<setting name="logImpl" value="LOG4J"/>
 	</settings>
 	<environments default="development">
 		<environment id="development">
 			<transactionManager type="JDBC"></transactionManager>
 			<dataSource type="POOLED">
				<property name="driver" value="${jdbc.driver}"/>
				<property name="url" value="${jdbc.url}"/>
				<property name="username" value="${jdbc.usename}"/>
				<property name="password" value="${jdbc.password}"/>
			</dataSource>
 		</environment>
 	</environments>
 	<mappers>
 		<mapper resource="com/smbms/dao/UserMapper.xml"/>
 		<mapper resource="com/smbms/dao/ProviderMapper.xml"/>
 	</mappers>
 </configuration>

（5）编写单元测试：

package com.smbms.entities;

import java.io.IOException;
import java.io.InputStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import com.smbms.dao.ProviderMapper;
import com.smbms.dao.UserMapper;

public class UserTest {
	
	public SqlSession getSqlSession() throws IOException{
		String resource = "mybatis-config.xml";
		InputStream inputStream = Resources.getResourceAsStream(resource);
		SqlSessionFactory build = new SqlSessionFactoryBuilder().build(inputStream);
		SqlSession openSession = build.openSession();
		return openSession;
	}
	
	//多条件查询--Map
	@Test
	public void test05 () throws IOException {
		Map<String,String> userMap = new HashMap<String,String>();
		userMap.put("uName","mmb");
		userMap.put("uRole","110");
		SqlSession session = getSqlSession();
		UserMapper mapper = session.getMapper(UserMapper.class);
		List<User> userlist = mapper.getUserListByMap(userMap);
		for(User user1 : userlist){
			System.out.println("**"+user1.toString());
		}		
	}
}

综上，就是一个将传参封装为Map进行传递的Spring Demo。