SSM整合

准备工作

创建Maven Module

导入依赖

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
<?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>org.example</groupId>
    <artifactId>SSM2</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <modules>
        <module>ssm</module>
    </modules>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>5.3.18</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--springmvc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Mybatis核心 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.13</version>
        </dependency>
        <!--mybatis和spring的整合包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
        <!-- junit测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <!-- MySQL驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.16</version>
        </dependency>
        <!-- log4j日志 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.2.0</version>
        </dependency>
        <!-- 日志 -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!-- ServletAPI -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.1</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- Spring5和Thymeleaf整合包 -->
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.12.RELEASE</version>
        </dependency>
    </dependencies>

</project>

创建表

1
2
3
4
5
6
7
8
CREATE TABLE `t_emp` (
    `emp_id` int(11) NOT NULL AUTO_INCREMENT,
    `emp_name` varchar(20) DEFAULT NULL,
    `age` int(11) DEFAULT NULL,
    `sex` char(1) DEFAULT NULL,
    `email` varchar(50) DEFAULT NULL,
    PRIMARY KEY (`emp_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

配置web.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <!-- 编码过滤器 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 配置处理请求方式过滤器 -->
    <!-- 用来处理put和delete方式的请求 -->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <!-- 配置SpringMCV前端控制器DispatcherServlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置SpringMVC配置文件的位置和名称 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:/springmvc.xml</param-value>
        </init-param>
        <!-- servlet在服务器启动的时候加载 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 配置Spring的监听器，在服务器启动时加载spring的配置文件 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 配置spring配置文件的位置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:/spring.xml</param-value>
    </context-param>
</web-app>

创建SpringMVC的配置文件并配置

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--扫描组件-->
    <context:component-scan base-package="com.hgu.controller">
    </context:component-scan>
    <!--配置视图解析器-->
    <bean id="viewResolver"
          class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean
                            class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
                        <!-- 视图前缀 -->
                        <property name="prefix" value="/WEB-INF/pages/"/>
                        <!-- 视图后缀 -->
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    </bean>
                </property>
            </bean>
        </property>
    </bean>
    <!-- 配置访问首页的视图控制 -->
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
    <!-- 配置默认的servlet处理静态资源 -->
    <mvc:default-servlet-handler />
    <!-- 开启MVC的注解驱动 -->
    <mvc:annotation-driven />
    
    <!-- 配置文件上传解析器 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
</beans>

搭建MyBatis环境

创建属性文件jdbc.properties

1
2
3
4
jdbc.username=root
jdbc.password=admin
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.connectUrl=jdbc:mysql://localhost:3306/ssm?CharacterEncoding=utf8&useUnicode=true&serverTimezone=UTC

创建MyBatis的核心配置文件mybatis-config.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
<?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>
    <settings>
        <!--将下划线映射为驼峰-->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <plugins>
        <!-- 配置分页插件 -->
        <plugin interceptor="com.github.pagehelper.PageInterceptor"></plugin>
    </plugins>
    
    <mappers>
        <package name="com.hgu.mapper"/>
    </mappers>
</configuration>

创建Mapper接口和映射文件

1
2
3
public interface EmployeeMapper {
List<Employee> getEmployeeList();
}
1
2
3
4
5
6
7
8
9
10
11
12
13
<?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">
<!--suppress SqlResolve -->
<mapper namespace="com.hgu.mapper.EmployeeMapper">

    <!-- List<Emp> getAllEmployee(); -->
    <select id="getAllEmployee" resultType="Emp">
        SELECT * FROM t_emp
    </select>

</mapper>

创建日志文件log4j.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
    <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
        <param name="Encoding" value="UTF-8" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%-5p %d{MM-dd HH:mm:ss,SSS} %m (%F:%L) \n" />
        </layout>
    </appender>
    <logger name="java.sql">
        <level value="debug" />
    </logger>
    <logger name="org.apache.ibatis">
        <level value="info" />
    </logger>
    <root>
        <level value="debug" />
        <appender-ref ref="STDOUT" />
    </root>
</log4j:configuration>

创建Spring的配置文件并配置

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context
                           https://www.springframework.org/schema/context/spring-context.xsd">
    <!--扫描组件-->
    <context:component-scan base-package="com.atguigu.ssm">
        <context:exclude-filter type="annotation"expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!-- 引入jdbc.properties -->
    <context:property-placeholder location="classpath:jdbc.properties">
    </context:property-placeholder>
    <!-- 配置Druid数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    <!-- 配置用于创建SqlSessionFactory的工厂bean -->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 设置MyBatis配置文件的路径（可以不设置） -->
        <property name="configLocation" value="classpath:mybatis-config.xml">
        </property>
        <!-- 设置数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 设置类型别名所对应的包 -->
        <property name="typeAliasesPackage" value="com.atguigu.ssm.pojo">
        </property>
        <!--
            设置映射文件的路径
            若映射文件所在路径和mapper接口所在路径一致，则不需要设置
        -->
        <!--
            <property name="mapperLocations" value="classpath:mapper/*.xml">
            </property>
        -->
    </bean>
    <!--
        配置mapper接口的扫描配置
        由mybatis-spring提供，可以将指定包下所有的mapper接口创建动态代理
        并将这些动态代理作为IOC容器的bean管理
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.atguigu.ssm.mapper"></property>
    </bean>
</beans>

4.7、测试功能

创建组件

实体类Employee

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
public class Employee {
    private Integer empId;
    private String empName;
    private Integer age;
    private String sex;
    private String email;
    public Employee() {
    }
    public Employee(Integer empId, String empName, Integer age, String sex,
                    String email) {
        this.empId = empId;
        this.empName = empName;
        this.age = age;
        this.sex = sex;
        this.email = email;
    }
    public Integer getEmpId() {
        return empId;
    }
    public void setEmpId(Integer empId) {
        this.empId = empId;
    }
    public String getEmpName() {
        return empName;
    }
    public void setEmpName(String empName) {
        this.empName = empName;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
}

创建控制层组件EmployeeController

1
2
3
4
5
6
7
8
9
10
11
@Controller
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;
    @RequestMapping(value = "/employee/page/{pageNum}", method = RequestMethod.GET)
    public String getEmployeeList(Model model, @PathVariable("pageNum") Integer pageNum){
        PageInfo<Employee> page = employeeService.getEmployeeList(pageNum);
        model.addAttribute("page", page);
        return "employee_list";
    }
}

创建接口EmployeeService

1
2
3
public interface EmployeeService {
	PageInfo<Employee> getEmployeeList(Integer pageNum);
}

创建实现类EmployeeServiceImpl

1
2
3
4
5
6
7
8
9
10
11
12
@Service
public class EmployeeServiceImpl implements EmployeeService {
    @Autowired
    private EmployeeMapper employeeMapper;
    @Override
    public PageInfo<Employee> getEmployeeList(Integer pageNum) {
        PageHelper.startPage(pageNum, 4);
        List<Employee> list = employeeMapper.getEmployeeList();
        PageInfo<Employee> page = new PageInfo<>(list, 5);
        return page;
    }
}

创建页面

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>Employee Info</title>
        <link rel="stylesheet" th:href="@{/static/css/index_work.css}">
    </head>
    <body>
        <table>
            <tr>
                <th colspan="6">Employee Info</th>
            </tr>
            <tr>
                <th>emp_id</th>
                <th>emp_name</th>
                <th>age</th>
                <th>sex</th>
                <th>email</th>
                <th>options</th>
            </tr>
            <tr th:each="employee : ${page.list}">
                <td th:text="${employee.empId}"></td>
                <td th:text="${employee.empName}"></td>
                <td th:text="${employee.age}"></td>
                <td th:text="${employee.sex}"></td>
                <td th:text="${employee.email}"></td>
                <td>
                    <a href="">delete</a>
                    <a href="">update</a>
                </td>
            </tr>
            <tr>
                <td colspan="6">
                    <span th:if="${page.hasPreviousPage}">
                        <a th:href="@{/employee/page/1}">首页</a>
                        <a th:href="@{'/employee/page/'+${page.prePage}}">上一页</a>
                    </span>
                    <span th:each="num : ${page.navigatepageNums}">
                        <a th:if="${page.pageNum==num}"
                           th:href="@{'/employee/page/'+${num}}" th:text="'['+${num}+']'" style="color:red;"></a>
                        <a th:if="${page.pageNum!=num}"
                           th:href="@{'/employee/page/'+${num}}" th:text="${num} "></a>
                    </span>
                    <span th:if="${page.hasNextPage}">
                        <a th:href="@{'/employee/page/'+${page.nextPage}}">下一页</a>
                        <a th:href="@{'/employee/page/'+${page.pages}}">末页</a>
                    </span>
                </td>
            </tr>
        </table>
    </body>
</html>

访问测试分页功能

localhost:8080/employee/page/1