SpringBoot框架与MyBatis集成，连接Mysql数据库
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2023-12-11 23:56:40
SpringBoot是一种用来简化新Spring应用初始搭建及开发过程的框架，它使用特定方式来进行配置，使得开发人员不再需要定义样板化的配置。MyBatis是一个支持普通SQL查询、存储和高级映射的持久层框架，它消除了几乎所有的JDBC代码和参数的手工配置以及对结果集的检索封装，可以使用简单的XML ......
springboot是一种用来简化新spring应用初始搭建及开发过程的框架，它使用特定方式来进行配置，使得开发人员不再需要定义样板化的配置。mybatis是一个支持普通sql查询、存储和高级映射的持久层框架，它消除了几乎所有的jdbc代码和参数的手工配置以及对结果集的检索封装，可以使用简单的xml或注解用于配置和原始映射，将接口和java的对象映射成数据库中的记录。
最近的项目有相关需求，集成springboot和mybatis框架后，进行mysql数据库的数据访问，实现功能后总结于此博客，方便以后查看。
首先下载一个springboot的demo程序，然后在它上面集成，访问：，如下图所示，勾选web选项后点击generate project即可下载工程。
打开demo后可以更改项目名称，设置目录为如下图形式，其中需要的jar包自行下载，
然后对每一个文件进行编辑，示例中有disaster和economic两部分内容，仅介绍disaster部分原理即可。
先构建disaster类，根据mysql中表的数据情况建立对象，disaster.java代码如下：
1 package smm.springboot.bean;
2
3 public class disaster {
4 private int id;
5 private string deathtoll;//死亡人数
6 private string injuriesnumber;//受伤人数
7 private string disappearancenumber;//失踪人数
8 private string total;//总人数
9 private string did;
10 public int getid() {
11 return id;
12 }
13 public void setid(int id) {
14 this.id = id;
15 }
16 public string getdeathtoll() {
17 return deathtoll;
18 }
19 public void setdeathtoll(string deathtoll) {
20 this.deathtoll = deathtoll;
21 }
22 public string getinjuriesnumber() {
23 return injuriesnumber;
24 }
25 public void setinjuriesnumber(string injuriesnumber) {
26 this.injuriesnumber = injuriesnumber;
27 }
28 public string getdisappearancenumber() {
29 return disappearancenumber;
30 }
31 public void setdisappearancenumber(string disappearancenumber) {
32 this.disappearancenumber = disappearancenumber;
33 }
34 public string gettotal() {
35 return total;
36 }
37 public void settotal(string total) {
38 this.total = total;
39 }
40 public string getdid() {
41 return did;
42 }
43 public void setdid(string did) {
44 this.did = did;
45 }
46 }
接下来是mybatis的接口disastermapper.java，代码如下：
1 package smm.springboot.mapper;
2 import org.apache.ibatis.annotations.mapper;
3
4 import smm.springboot.bean.disaster;
5
6 @mapper
7 public interface disastermapper {
8 public void insert(disaster disaster);//插入数据
9 public disaster find(int id);//查找数据
10 }
对应的mapper文件，disastermapper.xml，插入数据和查找数据的程序都是在这个xml文件中生成，代码如下：
1 <?xml version="1.0" encoding="utf-8"?>
2 <!doctype mapper public "-//mybatis.org//dtd mapper 3.0//en" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
3
4 <mapper namespace="smm.springboot.mapper.disastermapper">
5 <!-- insert disaster -->
6 <insert id="insert" parametertype="smm.springboot.bean.disaster">
7 insert into d_disaster_overview(deathtoll,injuriesnumber,disappearancenumber,total,did) value(#{deathtoll},#{injuriesnumber},#{disappearancenumber},#{total},#{did});
8 </insert>
9
10 <!-- find disaster -->
11 <select id="find" parametertype="int" resulttype="smm.springboot.bean.disaster">
12 select sum(deathtoll) as deathtoll,sum(injuriesnumber) as injuriesnumber,sum(disappearancenumber) as disappearancenumber, sum(total) as total from d_disaster_overview where id=#{id}
13 </select>
14 </mapper>
然后是业务层的接口与实现类，disasteriservice.java的代码如下：
1 package smm.springboot.service;
2 import org.springframework.stereotype.component;
3 import org.springframework.web.servlet.dispatcherservlet;
4
5 import smm.springboot.bean.disaster;
6
7 public interface disasteriservice{
8
9 public boolean insert(disaster disaster);
10 public disaster find(int id);
11 }
disasterservice.java的代码如下：
1 package smm.springboot.service.impl;
2
3 import javax.annotation.resource;
4 import org.springframework.context.annotation.componentscan;
5 import org.springframework.stereotype.service;
6
7 import smm.springboot.bean.disaster;
8 import smm.springboot.mapper.disastermapper;
9 import smm.springboot.service.disasteriservice;
10
11 @componentscan({"smm.springboot.mapper"})
12 @service("disasterservice")
13 public class disasterservice implements disasteriservice{
14 @resource
15 private disastermapper disastermapper;
16 @override
17 public boolean insert(disaster disaster) {
18
19 try {
20 disastermapper.insert(disaster);
21 } catch (exception e) {
22 //todo auto-generated catch block
23 return false;
24 }
25 return true;
26 }
27 @override
28 public disaster find(int id) {
29 return disastermapper.find(id);
30 }
31 }
接下来是比较重要的前端控制器allcontroller.java，它之中关于disaster的部分代码如下：
1 package com.example.demo;
2
3 import javax.annotation.resource;
4 import org.mybatis.spring.annotation.mapperscan;
5 import org.springframework.context.annotation.componentscan;
6 import org.springframework.stereotype.controller;
7 import org.springframework.web.bind.annotation.requestmapping;
8 import org.springframework.web.bind.annotation.responsebody;
9 import com.google.gson.jsonobject;
10
11 import smm.springboot.bean.*;
12 import smm.springboot.service.impl.*;
13
14 @controller
15 @componentscan({"smm.springboot.service"})
16 @mapperscan({"smm.springboot.mapper"})
17 public class allcontroller {
18
19 @resource
20 private disasterservice disasterservice;
21 //disaster部分
22 @requestmapping("/disastersaveresult")
23 @responsebody
24 public string hellod(disaster disaster) {
25 boolean result=disasterservice.insert(disaster);
26 jsonobject json=new jsonobject();
27 if(result){
28 json.addproperty("manager", "添加成功");
29 json.addproperty("result", "1");
30 }else{
31 json.addproperty("manager", "添加失败");
32 json.addproperty("result", "0");
33 }
34 return json.tostring();
35 }
36 @requestmapping("/disasterfind")
37 @responsebody
38 public string sayd(int id){
39 disaster d=disasterservice.find(id);
40 jsonobject json=new jsonobject();
41 json.addproperty("deathtoll", d.getdeathtoll());
42 json.addproperty("injuriesnumber", d.getinjuriesnumber());
43 json.addproperty("disappearancenumber", d.getdisappearancenumber());
44 json.addproperty("total", d.gettotal());
45 return json.tostring();
46 }
47 @requestmapping("/disastersave")
48 public string jspd() {
49 return "disasterindex";
50 }
51 }
还有servletinitializer.java，其代码如下：
1 package com.example.demo;
2
3 import org.springframework.boot.builder.springapplicationbuilder;
4 import org.springframework.boot.web.servlet.support.springbootservletinitializer;;
5
6 public class servletinitializer extends org.springframework.boot.web.servlet.support.springbootservletinitializer{
7 @override
8 protected springapplicationbuilder configure(springapplicationbuilder application) {
9 return application.sources(this.getclass());
10 }
11 }
还有springboot的配置文件application.properties，内容如下：
server.context-path=/helloworld
spring.datasource.driver-class-name =com.mysql.jdbc.driver
spring.datasource.url =jdbc:mysql://10.10.10.7:3306/mysql
spring.datasource.username =name
spring.datasource.password =password
mybatis.typealiasespackage=smm.springboot.bean
mybatis.mapperlocations=classpath:mapper/*mapper.xml
spring.freemarker.template-loader-path=classpath:/templates/
spring.freemarker.cache=false
spring.freemarker.charset=utf-8
spring.freemarker.check-template-location=true
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=true
spring.freemarker.expose-session-attributes=true
spring.freemarker.request-context-attribute=request
spring.freemarker.suffix=.ftl
spring.mvc.view.prefix = /web-inf/jsp/
spring.mvc.view.suffix = .jsp
还有maven项目的配置文件pom.xml，内容如下：
1 <?xml version="1.0" encoding="utf-8"?> 2 <project xmlns="http://maven.apache.org/pom/4.0.0" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" 3 xsi:schemalocation="http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4 <modelversion>4.0.0</modelversion> 5 6 <groupid>disaster</groupid> 7 <artifactid>disaster</artifactid> 8 <version>0.0.1-snapshot</version> 9 <packaging>war</packaging> 10 11 <name>springbootone</name> 12 <url>http://maven.apache.org</url> 13 14 <properties> 15 <project.build.sourceencoding>utf-8</project.build.sourceencoding> 16 </properties> 17 18 <!-- 添加springboot继承 --> 19 <parent> 20 <groupid>org.springframework.boot</groupid> 21 <artifactid>spring-boot-starter-parent</artifactid> 22 <version>2.1.0.release</version> 23 </parent> 24 25 <dependencies> 26 <!-- 添加springmvc支持 --> 27 <dependency> 28 <groupid>org.springframework.boot</groupid> 29 <artifactid>spring-boot-starter-web</artifactid> 30 </dependency> 31 <!-- mysql --> 32 <dependency> 33 <groupid>mysql</groupid> 34 <artifactid>mysql-connector-java</artifactid> 35 <version>5.1.19</version> 36 </dependency> 37 <!-- mybatis --> 38 <dependency> 39 <groupid>org.mybatis</groupid> 40 <artifactid>mybatis</artifactid> 41 <version>3.4.5</version> 42 </dependency> 43 <dependency> 44 <groupid>org.mybatis</groupid> 45 <artifactid>mybatis-spring</artifactid> 46 <version>1.3.1</version> 47 </dependency> 48 <dependency> 49 <groupid>org.springframework</groupid> 50 <artifactid>spring-webmvc</artifactid> 51 <version>5.1.2.release</version> 52 </dependency> 53 <dependency> 54 <groupid>org.springframework</groupid> 55 <artifactid>spring-tx</artifactid> 56 <version>5.1.2.release</version> 57 </dependency> 58 <dependency> 59 <groupid>org.apache.logging.log4j</groupid> 60 <artifactid>log4j-core</artifactid> 61 <version>2.7</version> 62 </dependency> 63 <dependency> 64 <groupid>com.alibaba</groupid> 65 <artifactid>druid</artifactid> 66 <version>1.1.6</version> 67 </dependency> 68 <dependency> 69 <groupid>org.springframework</groupid> 70 <artifactid>spring-jdbc</artifactid> 71 <version>5.0.2.release</version> 72 </dependency> 73 <dependency> 74 <groupid>org.mybatis.spring.boot</groupid> 75 <artifactid>mybatis-spring-boot-starter</artifactid> 76 <version>1.2.0</version> 77 </dependency> 78 <dependency> 79 <groupid>org.springframework.boot</groupid> 80 <artifactid>spring-boot-starter-web</artifactid> 81 </dependency> 82 <!-- tomcat支持 --> 83 <dependency> 84 <groupid>org.springframework.boot</groupid> 85 <artifactid>spring-boot-starter-tomcat</artifactid> 86 <scope>provided</scope> 87 </dependency> 88 <dependency> 89 <groupid>org.apache.tomcat.embed</groupid> 90 <artifactid>tomcat-embed-jasper</artifactid> 91 <scope>provided</scope> 92 </dependency> 93 <!-- jsp标签库 --> 94 <dependency> 95 <groupid>javax.servlet</groupid> 96 <artifactid>jstl</artifactid> 97 </dependency> 98 <dependency> 99 <groupid>com.google.code.gson</groupid> 100 <artifactid>gson</artifactid> 101 <version>2.8.0</version> 102 </dependency> 103 </dependencies> 104 105 <build> 106 <finalname>boot</finalname> 107 <plugins> 108 <!-- 引入java编译器插件 --> 109 <plugin> 110 <groupid>org.apache.maven.plugins</groupid> 111 <artifactid>maven-compiler-plugin</artifactid> 112 <configuration> 113 <source>1.8</source> 114 <target>1.8</target> 115 <compilerversion>1.8</compilerversion> 116 <encoding>utf-8</encoding> 117 </configuration> 118 </plugin> 119 <!-- 资源文件拷贝插件 --> 120 <plugin> 121 <groupid>org.apache.maven.plugins</groupid> 122 <artifactid>maven-resources-plugin</artifactid> 123 <configuration> 124 <encoding>utf-8</encoding> 125 </configuration> 126 </plugin> 127 </plugins> 128 </build> 129 </project>
另外还配置了一个用来输入数据的页面disasterindex.jsp，目录如下图：
内容代码如下：
1 <%@ page language="java" contenttype="text/html; charset=utf-8" 2 pageencoding="utf-8"%> 3 <!doctype html> 4 <html> 5 <head> 6 <title>输入灾害数据</title> 7 </head> 8 <body> 9 <h1>please input disaster data!</h1> 10 <form action="disastersaveresult" name="form"> 11 <p> 12 <table border="1"> 13 <tr> 14 <td>死亡人数</td> 15 <td>受伤人数</td> 16 <td>失踪人数</td> 17 <td>总人数</td> 18 <td>did</td> 19 </tr> 20 <tr> 21 <td><input name="deathtoll" type="text" /></td> 22 <td><input name="injuriesnumber" type="text" /></td> 23 <td><input name="disappearancenumber" type="text" /></td> 24 <td><input name="total" type="text" /></td> 25 <td><input name="did" value="1" type="text" /></td> 26 </tr> 27 </table> 28 </p> 29 <tr> 30 <td><input type="submit" value="确定" size="50" /></td> 31 <td><input type="reset" value="取消" size="50" /></td> 32 </tr> 33 </form> 34 </body> 35 </html>
最后是程序启动类demoapplication.java，内容如下：
1 package com.example.demo;
2
3 import org.springframework.boot.springapplication;
4 import org.springframework.boot.autoconfigure.springbootapplication;
5 import java.net.*;
6 import java.util.arraylist;
7 import java.util.list;
8 import java.io.fileoutputstream;
9 import java.io.inputstream;
10 import java.io.filenotfoundexception;
11 import java.io.ioexception;
12
13 import org.apache.http.httpentity;
14 import org.apache.http.httpresponse;
15 import org.apache.http.namevaluepair;
16 import org.apache.http.client.httpclient;
17 import org.apache.http.client.methods.httpget;
18 import org.apache.http.client.entity.urlencodedformentity;
19 import org.apache.http.client.methods.httppost;
20 import org.apache.http.impl.client.defaulthttpclient;
21 import org.apache.http.message.basicnamevaluepair;
22 import org.apache.http.util.entityutils;
23 import org.codehaus.jettison.json.jsonobject;
24
25
26 @springbootapplication
27 public class demoapplication {
28 public static void main(string[] args) {
29 springapplication.run(demoapplication.class, args);
30 }
31 }
点击run as java application后启动，可看到如下信息：
在浏览器输入http://localhost:8080//disastersave，得到以下页面，便可在表格中输入数据并插入到mysql数据库的表中。
至此，整个工程已经完成！