一.前后端分离接口说明

二.ssm整合的步骤

2.1 建库、建表

/*
 Navicat Premium Data Transfer

 Source Server         : zar
 Source Server Type    : MySQL
 Source Server Version : 80022
 Source Host           : localhost:3306
 Source Schema         : ssmusers

 Target Server Type    : MySQL
 Target Server Version : 80022
 File Encoding         : 65001

 Date: 26/06/2021 16:26:14
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

CREATE DATABASE IF NOT EXISTS `ssmuser` DEFAULT CHARACTER SET utf8;
USE `ssmuser`;

-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`  (
  `user_id` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '',
  `card_type` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `card_no` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `user_name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `user_sex` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `user_age` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `user_role` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`user_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = COMPACT;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('15968162087363060', '身份证', '114264195202156467', '张三', '男', '30', '办事人员和有关人员');
INSERT INTO `user` VALUES ('15968162346981977', '护照', 'A32532654', '李四', '男', '29', '不便分类的其他从业人员');
INSERT INTO `user` VALUES ('15968162893439470', '身份证', '112344198709094532', '王五', '男', '31', '农、林、牧、渔、水利业生产人员');
INSERT INTO `user` VALUES ('15968163245457143', '身份证', '453234199909094532', '赵六', '男', '34', '未知');
INSERT INTO `user` VALUES ('15968163514764733', '军官证', '军7657868', '钱七', '女', '23', '不便分类的其他从业人员');
INSERT INTO `user` VALUES ('15968165113694372', '台湾往来大陆通行证', '43256786', '周八', '女', '48', '生产、运输设备操作人员及有关人员');
INSERT INTO `user` VALUES ('15968165371931786', '港澳居民通行证', 'C98767665', '吴九', '女', '35', '不便分类的其他从业人员');
INSERT INTO `user` VALUES ('15968941217553030', '身份证', '343546199801018768', '郑十', '男', '22', '军人');
INSERT INTO `user` VALUES ('15968943937844616', '身份证', '445453199603025756', '冯十一', '女', '31', '不便分类的其他从业人员');
INSERT INTO `user` VALUES ('15968944123869023', '护照', 'B54322654', '陈十二', '女', '39', '农、林、牧、渔、水利业生产人员');
INSERT INTO `user` VALUES ('15968953962316864', '身份证', '110232199505056789', '朱十三', '女', '33', '商业、服务业人员');
INSERT INTO `user` VALUES ('15968954638794962', '身份证', '110654196604079098', '孔十四', '女', '29', '生产、运输设备操作人员及有关人员');

SET FOREIGN_KEY_CHECKS = 1;

2.2 新建Maven项目，选择webapp模板

2.3 修改目录

2.4 修改pom.xml文件

  <!-- 集中定义依赖版本号 -->
  <properties>
    <junit.version>4.12</junit.version>
    <spring.version>5.3.18</spring.version>
    <mybatis.version>3.5.1</mybatis.version>
    <mybatis.spring.version>1.3.1</mybatis.spring.version>
    <mybatis.paginator.version>1.2.15</mybatis.paginator.version>
    <mysql.version>8.0.30</mysql.version>
    <slf4j.version>1.6.4</slf4j.version>
    <druid.version>1.1.12</druid.version>
    <pagehelper.version>5.1.2</pagehelper.version>
    <jstl.version>1.2</jstl.version>
    <servlet-api.version>3.1.0</servlet-api.version>
    <jsp-api.version>2.0</jsp-api.version>
    <jackson.version>2.9.6</jackson.version>
  </properties>


  <dependencies>
    <!-- spring -->
    <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>
    <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>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jms</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.3.18</version>
    </dependency>
    <!-- Mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis.spring.version}</version>
    </dependency>
    <dependency>
      <groupId>com.github.miemiedev</groupId>
      <artifactId>mybatis-paginator</artifactId>
      <version>${mybatis.paginator.version}</version>
    </dependency>
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>
    <!-- MySql -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>
    <!-- 连接池 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>

    <!-- junit -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
      <scope>com.bjpowernode.test</scope>
    </dependency>


    <!-- JSP相关 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <scope>provided</scope>
      <version>${jsp-api.version}</version>
    </dependency>
    <!-- Jackson Json处理工具包 -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>${jackson.version}</version>
    </dependency>
    <dependency>
      <groupId>org.json</groupId>
      <artifactId>json</artifactId>
      <version>20140107</version>
    </dependency>

    <!--    文件异步上传使用的依赖-->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-simple</artifactId>
    <version>1.7.25</version>
  </dependency>
  </dependencies>

  <!-- 插件配置 -->
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <source>17</source>
          <target>17</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
    </plugins>
    <!--识别所有的配置文件-->
    <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>
  </build>

2.5 添加jdbc.properties属性配置文件

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmuser
jdbc.username=root
jdbc.password=021107

2.6 添加mybatis-config.xml文件（使用模板）

<?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>
        <!--设置日志输出语句，显示相应操作的sql语句-->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>


</configuration>

2.7 添加applicationContext_mapper.xml文件（数据访问层的核心配置文件）

<?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">

    <!--读取属性文件jdbc.properties-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--创建数据源-->
    <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>

    <!--设置SqlSessionFactoryBean类-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--配置数据源-->
        <property name="dataSource" ref="dataSource"></property>
        <!--配置Mybatis核心配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!--注册实体类别名-->
        <property name="typeAliasesPackage" value="com.jm.pojo"></property>
    </bean>

    <!--注册mapper.xml文件-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.jm.mapper"></property>
    </bean>
</beans>

2.8 添加applicationContext_service.xml文件（业务逻辑层的核心配置文件）

<?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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--添加包扫描-->
    <context:component-scan base-package="com.jm.service"></context:component-scan>
    <!--添加事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--配置数据源-->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--配置事务切面-->
    <tx:advice id="myadvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*select*" read-only="true"/>
            <tx:method name="*find*" read-only="true"/>
            <tx:method name="*search*" read-only="true"/>
            <tx:method name="*get*" read-only="true"/>
            <tx:method name="*insert*" propagation="REQUIRED"/>
            <tx:method name="*add*" propagation="REQUIRED"/>
            <tx:method name="*set*" propagation="REQUIRED"/>
            <tx:method name="*save*" propagation="REQUIRED"/>
            <tx:method name="*update*" propagation="REQUIRED"/>
            <tx:method name="*change*" propagation="REQUIRED"/>
            <tx:method name="*modify*" propagation="REQUIRED"/>
            <tx:method name="*delete*" propagation="REQUIRED"/>
            <tx:method name="*remove*" propagation="REQUIRED"/>
            <tx:method name="*clear*" propagation="REQUIRED"/>
            <tx:method name="*drop*" propagation="REQUIRED"/>
            <tx:method name="*" propagation="SUPPORTS"/>
        </tx:attributes>
    </tx:advice>
    <!--配置切入点+绑定-->
    <aop:config>
        <aop:pointcut id="mycut" expression="execution(* com.jm.service.impl.*.*(..))"/>
        <aop:advisor advice-ref="myadvice" pointcut-ref="mycut"/>
    </aop:config>
</beans>

2.9 添加springmvc.xml文件

<?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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--添加包扫描-->
    <context:component-scan base-package="com.jm.controller"></context:component-scan>
    
    <!--添加注解驱动-->
    <mvc:annotation-driven></mvc:annotation-driven>

    <!--若是ajax请求，不需要配置视图解析器-->
    <!--
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    -->

    <!--注册拦截器-->
    <!--
    <mvc:interceptors>
        <mvc:interceptor>
            &lt;!&ndash;要拦截的请求&ndash;&gt;
            <mvc:mapping path="/**"/>
            &lt;!&ndash;设置放行的请求&ndash;&gt;
            <mvc:exclude-mapping path=""/>
            <mvc:exclude-mapping path=""/>
            &lt;!&ndash;配置具体的拦截器实现功能的类&ndash;&gt;
            <bean class=""></bean>
        </mvc:interceptor>
        &lt;!&ndash;拦截器链.......&ndash;&gt;
    </mvc:interceptors>
    -->

</beans>

2.10 删除web.xml文件，新建，设置中文编码，并注册springmvc框架，并注册spring框架

<?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"
         metadata-complete="false">
    <!--添加中文编码过滤器-->
    <filter>
        <filter-name>encode</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>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encode</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--注册SpringMVC框架-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--注册Spring框架,目的是启动spring容器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext_*.xml</param-value>
    </context-param>
</web-app>

2.11 新建实体类User

package com.jm.pojo;

public class User {
    private String userId;
    private String cardType;
    private String cardNo;
    private String userName;
    private String userSex;
    private String userAge;
    private String userRole;

    @Override
    public String toString() {
        return "User{" +
                "userId='" + userId + '\'' +
                ", cardType='" + cardType + '\'' +
                ", cardNo='" + cardNo + '\'' +
                ", userName='" + userName + '\'' +
                ", userSex='" + userSex + '\'' +
                ", userAge='" + userAge + '\'' +
                ", userRole='" + userRole + '\'' +
                '}';
    }

    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        this.userId = userId;
    }

    public String getCardType() {
        return cardType;
    }

    public void setCardType(String cardType) {
        this.cardType = cardType;
    }

    public String getCardNo() {
        return cardNo;
    }

    public void setCardNo(String cardNo) {
        this.cardNo = cardNo;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserSex() {
        return userSex;
    }

    public void setUserSex(String userSex) {
        this.userSex = userSex;
    }

    public String getUserAge() {
        return userAge;
    }

    public void setUserAge(String userAge) {
        this.userAge = userAge;
    }

    public String getUserRole() {
        return userRole;
    }

    public void setUserRole(String userRole) {
        this.userRole = userRole;
    }

    public User(String userId, String cardType, String cardNo, String userName, String userSex, String userAge, String userRole) {
        this.userId = userId;
        this.cardType = cardType;
        this.cardNo = cardNo;
        this.userName = userName;
        this.userSex = userSex;
        this.userAge = userAge;
        this.userRole = userRole;
    }

    public User() {
    }
}

2.12 新建UserMapper.java接口

package com.jm.mapper;

import com.jm.pojo.User;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface UserMapper {
    /**
     * url	/user/selectUserPage?userName=z&userSex=男&page=null
     * 参数
         * userName:表单中用户名称
         * userSex:表单中用户性别
         * page:提交的页码(第一次访问为null)
     * 结果	有数据时：
     * [{
     * "userId":"15968954638794962",
     * "cardType":"身份证","
     * cardNo":"343343554654",
     * "userName":"撒撒旦",
     * "userSex":"女",
     * "userAge":"29",
     * "userRole":"生产、运输设备操作人员及有关人员"},
     * {….}
     * ]
     * 无数据时：
     * []
     */
    List<User> selectUserPage(  //根据条件分页获取分页数据
            @Param("userName")
            String userName,
            @Param("userSex")
            String userSex,
            @Param("startRow") // 算好的起始行的值
            int startRow);

    /**
     * url	/user/createUser(参数见下面)
     * 参数
         * cardType: this.ruleForm.cardType,//证件类型
         * cardNo: this.ruleForm.cardNo,//证件号码
         * userName: this.ruleForm.userName,//用户姓名
         * userSex: this.ruleForm.userSex,//用户性别
         * userAge: this.ruleForm.userAge,//用户年龄
         * userRole: this.ruleForm.userRole,//用户角色
     * 结果	增加成功时：
     * 1
     * 增加失败时:
     * 0
     */
    int createUser(User user); // 增加用户

    /**
     * url	/user/ deleteUserById?userId= 15968162087363060
     * 参数
        * userId:删除用户的id
     * 结果	删除成功时：
     * 1
     * 删除失败时:
     * 0
     */
    int deleteUserById(String userId); // 根据用户ID删除用户

    /**
     * url	/user/updateUserById(参数见以下)
     * 参数
         * userId: this.ruleForm.userId,//用户 Id
         * cardType: this.ruleForm.cardType,//证件类型
         * cardNo: this.ruleForm.cardNo,//证件号码
         * userName: this.ruleForm.userName,//用户姓名
         * userSex: this.ruleForm.userSex,//用户性别
         * userAge: this.ruleForm.userAge,//用户年龄
         * userRole: this.ruleForm.userRole,//用户角色
     * 结果	成功时：
     * 1
     * 出错时：
     * 0
     */
    int updateUserById(User user); // 更新用户

    /**
     * url	/user/getRowCount?userName=z&userSex=男
     * 参数
         * userName:表单中用户名称
         * userSex:表单中用户性别
     * 结果	有数据时:
     * 12
     * 无数据时:
     * 0
     */
    int getRowCount( // 获取总行数
            @Param("userName")
            String userName,
            @Param("userSex")
            String userSex);
}

2.13 新建UserMapper.xml是实现增删改查所以功能

<?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.jm.mapper.UserMapper">
    <!--
        完成实体类与表中列名的映射
            private String userId;
            private String cardType;
            private String cardNo;
            private String userName;
            private String userSex;
            private String userAge;
            private String userRole;
    -->
    <resultMap id="UserMapperMap" type="user">
        <id property="userId" column="user_id"/>
        <result property="cardType" column="card_type"></result>
        <result property="cardNo" column="card_no"></result>
        <result property="userName" column="user_name"></result>
        <result property="userSex" column="user_sex"></result>
        <result property="userAge" column="user_age"></result>
        <result property="userRole" column="user_role"></result>
    </resultMap>

    <!--定义全部列名-->
    <sql id="allColumns">
        user_id,card_type,card_no,user_name,user_sex,user_age,user_role
    </sql>

    <!--
    List<User> selectUserPage(  //根据条件分页获取分页数据
            @Param("userName")
            String userName,
            @Param("userSex")
            String userSex,
            @Param("startRow") // 算好的起始行的值
            int startRow);
    -->
    <select id="selectUserPage" resultMap="UserMapperMap">
        select <include refid="allColumns"></include>
        from user
        <where>
            <if test="userName!=null and userName!=''">
                and user_name like "%"#{userName}"%"
            </if>
            <if test="userSex!=null and userSex!=''">
                and user_sex=#{userSex}
            </if>
        </where>
        limit #{startRow},${@com.jm.controller.UserController@PAGE_SIZE}
    </select>

    <!--
    int createUser(User user); // 增加用户
    -->
    <insert id="createUser">
        insert into user values (#{userId},#{cardType},#{cardNo},#{userName},#{userSex},#{userAge},#{userRole})
    </insert>

    <!--
    int deleteUserById(String userId); // 根据用户ID删除用户
    -->
    <delete id="deleteUserById">
        delete
        from user
        where user_id=#{userId}
    </delete>

    <!--
    int updateUserById(User user); // 更新用户
    -->
    <update id="updateUserById">
        update user
        set card_type = #{cardType},card_no=#{cardNo},user_name=#{userName},
            user_sex=#{userSex},user_age=#{userAge},user_role=#{userRole}
        where user_id=#{userId}
    </update>

    <!--
    int getRowCount( // 获取总行数
            @Param("userName")
            String userName,
            @Param("userSex")
            String userSex);
    -->
    <select id="getRowCount" resultType="int">
        select count(*) from user
        <where>
            <if test="userName!=null and userName!=''">
                and user_name like "%"#{userName}"%"
            </if>
            <if test="userSex!=null and userSex!=''">
                and user_sex=#{userSex}
            </if>
        </where>
    </select>

</mapper>

2.14 新建service接口和实现类

service接口

package com.jm.service;

import com.jm.pojo.User;

import java.util.List;

public interface UserService {
    /**
     * url	/user/selectUserPage?userName=z&userSex=男&page=null
     */
    List<User> selectUserPage(String userName,String userSex,int startRow);

    /**
     * url	/user/createUser(参数见下面)
     */
    int createUser(User user);

    /**
     * url	/user/ deleteUserById?userId= 15968162087363060
     */
    int deleteUserById(String userId);

    /**
     * url	/user/updateUserById(参数见以下)
     */
    int updateUserById(User user);

    /**
     * url	/user/getRowCount?userName=z&userSex=男
     */
    int getRowCount(String userName,String userSex);
}

service实体类

package com.jm.service.impl;

import com.jm.mapper.UserMapper;
import com.jm.pojo.User;
import com.jm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserServiceImpl implements UserService {
    //切记切记：业务逻辑层一定会有数据访问层的对象
    @Autowired
    UserMapper userMapper;

    @Override
    public List<User> selectUserPage(String userName, String userSex, int startRow) {
        return userMapper.selectUserPage(userName,userSex,startRow);
    }

    @Override
    public int createUser(User user) {
        return userMapper.createUser(user);
    }

    @Override
    public int deleteUserById(String userId) {
        return userMapper.deleteUserById(userId);
    }

    @Override
    public int updateUserById(User user) {
        return userMapper.updateUserById(user);
    }

    @Override
    public int getRowCount(String userName, String userSex) {
        return userMapper.getRowCount(userName,userSex);
    }
}

2.15 新建测试类，完成所有功能的测试

package com.jm.service;

import com.jm.pojo.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class) // 启动spring容器
@ContextConfiguration(locations = {"classpath:applicationContext_mapper.xml",
        "classpath:applicationContext_service.xml"})
public class ServiceTest {
    @Autowired
    UserService userService;

    @Test
    public void testSelectUserPage(){
        List<User> users = userService.selectUserPage("", null, 0);
        users.forEach(user -> System.out.println(user));
    }

    @Test
    public void testDeleteUserById(){
        int num = userService.deleteUserById("15968162087363060");
        System.out.println(num);
    }

    @Test
    public void testGetRowCount(){
        int count=userService.getRowCount(null,"男");
        System.out.println(count);
    }

    @Test
    public void testCreateUser(){
        User u=new User("123154968453641","身份证","12341","哈哈哈","男","27","工人");
        int num = userService.createUser(u);
        System.out.println(num);
    }

    @Test
    public void testUpdateUserById(){
        User u=new User("123154968453641","大怪兽","12341","嗨嗨嗨","男","27","工人");
        int num = userService.updateUserById(u);
        System.out.println(num);
    }
}

2.16 新建控制器，完成所有功能

package com.jm.controller;

import com.jm.pojo.User;
import com.jm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@CrossOrigin // 在服务器端支持跨域访问
@RestController //如果本类中全部都是ajax请求，则使用此注解，方法上的@ResponseBody可不写
@RequestMapping("/user")
public class UserController {
    //切记切记：界面层一定有业务逻辑层的对象
    @Autowired
    UserService userService;

    public static final int PAGE_SIZE = 5;

    // url	/user/selectUserPage?userName=z&userSex=男&page=null
    @RequestMapping("/selectUserPage")
    //@ResponseBody
    public List<User> selectUserPage(String userName,String userSex,Integer page){
        int startPage=0;
        if(page!=null){
            startPage=(page-1)*PAGE_SIZE;
        }
        return  userService.selectUserPage(userName,userSex,startPage);
    }

    // url	/user/getRowCount?userName=z&userSex=男
    @RequestMapping("/getRowCount")
    //@ResponseBody
    public int getRowCount(String userName,String userSex){
        return userService.getRowCount(userName,userSex);
    }

    // url	/user/ deleteUserById?userId= 15968162087363060
    @RequestMapping("/deleteUserById")
    //@ResponseBody
    public int deleteUserById(String userId){
        return userService.deleteUserById(userId);
    }

    // url	/user/createUser(参数见下面)
    @RequestMapping("/createUser")
    //@ResponseBody
    public int createUser(User user){
        String userId=System.currentTimeMillis()+"";
        user.setUserId(userId);
        return userService.createUser(user);
    }

    // url	/user/updateUserById(参数见以下)
    @RequestMapping("/updateUserById")
    //@ResponseBody
    public int updateUserById(User user){
        return userService.updateUserById(user);
    }
}

2.17 浏览器测试功能

三.配置地狱：依赖和配置（总结）

1.配置pom.xml文件
2.配置jdbc.properties
3.配置mybatis-config.xml
	只留下setting即可！
4.配置applicationContext_mapper.xml
	1）导入属性配置文件	
	2）创建数据源
	3）配置SqlSessionFactoryBean
		* 配置数据源
		* 配置mybatis-config核心配置
		* 注册实体类别名
	4）注册mapper.xml文件
5.配置applicationContext_service.xml
	1）添加包扫描
	2）添加事务管理器
		* 配置数据源
	3）配置事务切面
	4）配置切入点+绑定
6.配置springmvc.xml
	1）添加包扫描
	2）添加注册驱动
	3）若不是ajax请求，需要配置视图解析器
	4）注册拦截器（看需求是否配置）
7.配置web.xml
	1）添加中文编码过滤器
	2）注册SpringMVC框架
	3）注册Spring框架（为了启动spring容器）