罗启涛作业

罗启涛_Mybatis1/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.ces</groupId>
+    <artifactId>mybatis</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.17</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mybatis</groupId>
+            <artifactId>mybatis</artifactId>
+            <version>3.2.8</version>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>1.2.54</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>
\ No newline at end of file

罗启涛_Mybatis1/src/main/java/com/ces/mybatis/TypeHandle.java

+package com.ces.mybatis;
+package com.ces.mybatis;
+import java.sql.CallableStatement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import org.apache.ibatis.type.BaseTypeHandler;
+import org.apache.ibatis.type.JdbcType;
+import com.alibaba.fastjson.JSONObject;
+
+public class TypeHandle extends BaseTypeHandler<JSONObject>{
+
+        @Override
+        public JSONObject getNullableResult(ResultSet rs, String s) throws SQLException {
+            String infoJsonString= rs.getString(s);
+            return infoJsonString==null?null:JSONObject.parseObject(infoJsonString);
+        }
+
+
+        @Override
+        public JSONObject getNullableResult(CallableStatement arg0, int arg1) throws SQLException {
+            return null;
+        }
+
+        @Override
+        public void setNonNullParameter(PreparedStatement statement, int i, JSONObject infoObject, JdbcType jdbcType) throws SQLException {
+            try {
+                String userInfoString= JSONObject.toJSONString(infoObject);
+                statement.setString(i, userInfoString);
+            } catch (Exception e) {
+                System.out.println("----将对象转化为字符串失败----");
+            }
+        }
+
+
+        @Override
+        public JSONObject getNullableResult(ResultSet arg0, int arg1) throws SQLException {
+            return null;
+        }
+
+
+
+    }
+

罗启涛_Mybatis1/src/main/java/com/ces/mybatis/User.java

+package com.ces.mybatis;
+package com.ces.mybatis;
+import java.io.Serializable;
+import com.alibaba.fastjson.JSONObject;
+
+public class User implements Serializable{
+    int id;
+    String name;
+    JSONObject info;
+    public int getId() {
+        return id;
+    }
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public JSONObject getInfo() {
+        return info;
+    }
+    public void setInfo(JSONObject info) {
+        this.info = info;
+    }
+
+    @Override
+    public String toString() {
+        return "User [id=" + id + ", name=" + name + ", info=" + JSONObject.toJSONString(info) + "]";
+    }
+}

罗启涛_Mybatis1/src/main/resources/MyMapper.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<?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:根标签，namespace：命名空间，随便写，一般保证命名空间唯一 -->
+<mapper namespace="MyMapper">
+    <!-- statement，内容：sql语句。id：唯一标识，随便写，在同一个命名空间下保持唯一
+       resultType：sql语句查询结果集的封装类型,tb_user即为数据库中的表
+     -->
+    <select id="selectUser" resultType="com.ces.mybatis.User">
+      select * from mybatis where id = #{id}
+   </select>
+    <insert id="insert" parameterType="com.ces.mybatis.User">
+    INSERT INTO mybatis (id, name, info)
+          VALUES(#{id}, #{name}, #{info})
+</insert>
+    <insert id="insertBatch">
+        INSERT INTO mybatis
+        (id, name, info)
+        VALUES
+        <foreach collection ="list" item="user" separator =",">
+            (#{user.id}, #{user.name}, #{user.info})
+        </foreach >
+    </insert>
+</mapper>

罗启涛_Mybatis1/src/main/resources/db.properties

+driver=com.mysql.cj.jdbc.Driver
+driver=com.mysql.cj.jdbc.Driver
+url=jdbc:mysql://localhost:3306/test?seUnicode=true&characterEncoding=utf8&useSSL=false
+username=root
+password=root

罗启涛_Mybatis1/src/main/resources/mybatis-config.xml

+<?xml version="1.0" encoding="UTF-8" ?>
+<?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">
+<!-- 根标签 -->
+<configuration>
+    <properties resource="db.properties"></properties>
+    <typeHandlers>
+        <typeHandler handler="com.ces.mybatis.TypeHandle"></typeHandler>
+    </typeHandlers>
+    <!-- 环境，可以配置多个，default：指定采用哪个环境 -->
+    <environments default="dev">
+        <!-- id：唯一标识 -->
+        <environment id="dev">
+            <!-- 事务管理器，JDBC类型的事务管理器 -->
+            <transactionManager type="JDBC" />
+            <!-- 数据源，池类型的数据源 -->
+            <dataSource type="POOLED">
+                <property name="driver" value="${driver}" /> <!-- 配置了properties，所以可以直接引用 -->
+                <property name="url" value="${url}" />
+                <property name="username" value="${username}" />
+                <property name="password" value="${password}" />
+            </dataSource>
+        </environment>
+    </environments>
+    <mappers>
+        <mapper resource="MyMapper.xml" />
+    </mappers>
+</configuration>

罗启涛_Mybatis1/src/main/resources/mybatis.sql

+/*
+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : 本机
+ Source Server Type    : MySQL
+ Source Server Version : 80015
+ Source Host           : localhost:3306
+ Source Schema         : test
+
+ Target Server Type    : MySQL
+ Target Server Version : 80015
+ File Encoding         : 65001
+
+ Date: 11/12/2019 14:34:10
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for mybatis
+-- ----------------------------
+DROP TABLE IF EXISTS `mybatis`;
+CREATE TABLE `mybatis`  (
+  `id` int(32) NOT NULL,
+  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
+  `info` varchar(1000) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
+  PRIMARY KEY (`id`) USING BTREE
+) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
+
+SET FOREIGN_KEY_CHECKS = 1;