SpringBoot整合mybatis——xml版

1、pom文件添加依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.1.1</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>


    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
</dependencies>

<build>

    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <fork>true</fork>
            </configuration>
        </plugin>
    </plugins>
</build>

2、修改resources包下的application.properties文件

#mapper自动扫描
mybatis.type-aliases-package=com.huaxun.springboot.mapper
#数据库信息
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf-8
spring.datasource.username = root
spring.datasource.password = root
#添加jsp支持，制定页面跳转的文件加和文件后缀
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

3、在entity包下新建User类，并在数据新建对应的表

DROP TABLE IF EXISTS `users`;
CREATE TABLE `users` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键id',
  `userName` varchar(32) DEFAULT NULL COMMENT '用户名',
  `passWord` varchar(32) DEFAULT NULL COMMENT '密码',
  `user_sex` varchar(32) DEFAULT NULL,
  `nick_name` varchar(32) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=50 DEFAULT CHARSET=utf8;

public class User {
    private  int id;
    private String userName;
    private String passWord;
    private String userSex;
    private String nickName;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassWord() {
        return passWord;
    }
    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }
    public String getUserSex() {
        return userSex;
    }
    public void setUserSex(String userSex) {
        this.userSex = userSex;
    }
    public String getNickName() {
        return nickName;
    }
    public void setNickName(String nickName) {
        this.nickName = nickName;
    }
}

4、在resouces包下新建mybatis包，并在mybatis包下新建mybatis-config.xml文件

<?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>
    <typeAliases>
        <typeAlias alias="Integer" type="java.lang.Integer" />
        <typeAlias alias="Long" type="java.lang.Long" />
        <typeAlias alias="HashMap" type="java.util.HashMap" />
        <typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" />
        <typeAlias alias="ArrayList" type="java.util.ArrayList" />
        <typeAlias alias="LinkedList" type="java.util.LinkedList" />
    </typeAliases>
</configuration>

5、在刚刚新建的mybatis包下，再新建mapper包，并在mapper包下新建UserMapper.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.huaxun.springboot.mapper.UserMapper" >
    <resultMap id="BaseResultMap" type="com.huaxun.springboot.entity.User" >
        <id column="id" property="id" jdbcType="BIGINT" />
        <result column="userName" property="userName"  />
        <result column="passWord" property="passWord"  />
        <result column="user_sex" property="userSex" />
        <result column="nick_name" property="nickName"  />
    </resultMap>

    <sql id="Base_Column_List" >
        id, userName, passWord, user_sex, nick_name
    </sql>

    <select id="getAll" resultMap="BaseResultMap"  >
        SELECT
        <include refid="Base_Column_List" />
        FROM users
    </select>

    <select id="getOne" parameterType="java.lang.Long" resultMap="BaseResultMap" >
        SELECT
        <include refid="Base_Column_List" />
        FROM users
        WHERE id = #{id}
    </select>

    <insert id="insert" parameterType="com.huaxun.springboot.entity.User" >
        INSERT INTO
        users
        (userName,passWord,user_sex)
        VALUES
        (#{userName}, #{passWord}, #{userSex})
    </insert>

    <update id="update" parameterType="com.huaxun.springboot.entity.User" >
        UPDATE
        users
        SET
        <if test="userName != null">userName = #{userName},</if>
        <if test="passWord != null">passWord = #{passWord},</if>
        nick_name = #{nickName}
        WHERE
        id = #{id}
    </update>

    <delete id="delete" parameterType="java.lang.Long" >
        DELETE FROM
        users
        WHERE
        id =#{id}
    </delete>
</mapper>

6、在java代码目录里面新建mapper包，并创建UserMapper接口

public interface UserMapper {
    List getAll();

    User getOne(Long id);

    void insert(User user);

    void update(User user);

    void delete(Long id);
}

7、在webapp目录下新建index.jsp文件

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form action="/user/save" method="post">
    <table border="1">
        <tr>
            <td>姓名</td>
            <td><input type="text" name="userName"/></td>
        </tr>
        <tr>
            <td>密码</td>
            <td><input type="text" name="passWord"/></td>
        </tr>
        <tr align="center">
            <td colspan="2"><input type="submit" value="提交"/></td>
        </tr>
    </table>
</form>
</body>
</html>

8、在webapp目录下的WEB-INF目录下新建jsp文件夹，并新建success.jsp文件

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
插入成功<br/>
${sessionScope.userName}<br/>
${requestScope.passWord}
</body>
</html>

9、运行启动SpringBoot的main方法，注意，需要加@MapperScan全局扫描，需和application.properties配置的mybatis.type-aliases-package一致

@SpringBootApplication
@MapperScan("com.huaxun.springboot.mapper")
public class SpringbootApplication {

   public static void main(String[] args) {
      SpringApplication.run(SpringbootApplication.class, args);
   }
}

10、浏览器打开localhost:8080/index.jsp

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11、填入数据，点击提交后成功跳转页面

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12、数据库多一条数据记录