IDEA搭建SSM实现增、删、改、查及登录判断、注册功能
Maven搭建SSM项目
使用Intellij idea 搭建基本的maven项目 new->project
最后Finish，Maven项目搭建完成
配置Maven
构建项目基本目录结构
如下图：
controller：http（GET和POST等）请求的入口，调用Service，向客户端返回数据
dao：接口，定义了数据表映射成的对象，具有的操作
mapping：具体是sql语句，以xml格式存在，即mybatis的语法文件
service：controller调用的服务，service调用dao里面定义的数据库行为方法，来执行对应mapping里的mybatis，从而完成与数据库完整的交互。
Pom.xml中配置相关Jar包信息
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0modelVersion> <groupId>hugogroupId> <artifactId>exampleartifactId> <packaging>warpackaging> <version>1.0-SNAPSHOTversion> <name>hugo Maven Webappname> <url>http://maven.apache.orgurl> <properties> <project.build.sourceEncoding>UTF-8project.build.sourceEncoding> <spring.version>4.1.4.RELEASEspring.version> <mybatis.version>3.2.8mybatis.version> <slf4j.version>1.7.7slf4j.version> <log4j.version>1.2.17log4j.version> <jackson.version>2.5.0jackson.version> properties> <dependencies> <dependency> <groupId>junitgroupId> <artifactId>junitartifactId> <version>3.8.1version> <scope>testscope> dependency> <dependency> <groupId>org.mybatisgroupId> <artifactId>mybatisartifactId> <version>${mybatis.version}version> dependency> <dependency> <groupId>org.mybatisgroupId> <artifactId>mybatis-springartifactId> <version>1.2.2version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-testartifactId> <version>${spring.version}version> <scope>testscope> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-webmvcartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-coreartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-beansartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-contextartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-context-supportartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-txartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-webartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-jdbcartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>javax.servletgroupId> <artifactId>javax.servlet-apiartifactId> <version>3.0.1version> <scope>providedscope> dependency> <dependency> <groupId>javax.servlet.jspgroupId> <artifactId>jsp-apiartifactId> <version>2.2version> <scope>providedscope> dependency> <dependency> <groupId>mysqlgroupId> <artifactId>mysql-connector-javaartifactId> <version>5.1.30version> dependency> <dependency> <groupId>commons-dbcpgroupId> <artifactId>commons-dbcpartifactId> <version>1.2.2version> dependency> <dependency> <groupId>jstlgroupId> <artifactId>jstlartifactId> <version>1.2version> dependency> <dependency> <groupId>log4jgroupId> <artifactId>log4jartifactId> <version>${log4j.version}version> dependency> <dependency> <groupId>com.alibabagroupId> <artifactId>fastjsonartifactId> <version>1.1.41version> dependency> <dependency> <groupId>org.slf4jgroupId> <artifactId>slf4j-apiartifactId> <version>${slf4j.version}version> dependency> <dependency> <groupId>org.slf4jgroupId> <artifactId>slf4j-log4j12artifactId> <version>${slf4j.version}version> dependency> <dependency> <groupId>org.codehaus.jacksongroupId> <artifactId>jackson-mapper-aslartifactId> <version>1.9.13version> dependency> <dependency> <groupId>com.fasterxml.jackson.coregroupId> <artifactId>jackson-databindartifactId> <version>2.1.0version> dependency> <dependency> <groupId>com.fasterxml.jackson.coregroupId> <artifactId>jackson-annotationsartifactId> <version>2.1.0version> dependency> <dependency> <groupId>commons-fileuploadgroupId> <artifactId>commons-fileuploadartifactId> <version>1.3.1version> dependency> <dependency> <groupId>commons-iogroupId> <artifactId>commons-ioartifactId> <version>2.4version> dependency> <dependency> <groupId>commons-codecgroupId> <artifactId>commons-codecartifactId> <version>1.9version> dependency> <dependency> <groupId>junitgroupId> <artifactId>junitartifactId> <version>4.11version> <scope>testscope> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-testartifactId> <version>4.1.7.RELEASEversion> dependency> <dependency> <groupId>junitgroupId> <artifactId>junitartifactId> <version>RELEASEversion> dependency> <dependency> <groupId>org.jsoupgroupId> <artifactId>jsoupartifactId> <version>1.8.1version> dependency> <dependency> <groupId>net.sourceforge.htmlunitgroupId> <artifactId>htmlunitartifactId> <version>2.15version> dependency> <dependency> <groupId>org.seleniumhq.seleniumgroupId> <artifactId>selenium-javaartifactId> <version>2.33.0version> dependency> <dependency> <groupId>us.codecraftgroupId> <artifactId>webmagic-coreartifactId> <version>0.6.1version> dependency> <dependency> <groupId>us.codecraftgroupId> <artifactId>webmagic-extensionartifactId> <version>0.6.1version> dependency> dependencies> <build> <finalName>hugofinalName> <resources> <resource> <directory>src/main/javadirectory> <includes> <include>**/*.xmlinclude> includes> <filtering>truefiltering> resource> resources> build> project>
配置好后基本骨架如下图
配置resources目录文件
jdbc.properties配置：
driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/mine?useUnicode=true&characterEncoding=utf-8 username=root password=root #定义初始连接数 initialSize=0 #定义最大连接数 maxActive=20 #定义最大空闲 maxIdle=20 #定义最小空闲 minIdle=1 #定义最长等待时间 maxWait=60000
log4j.properties配置：
#定义LOG输出级别 log4j.rootLogger=INFO,Console,File #定义日志输出目的地为控制台 log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.Target=System.out #可以灵活地指定日志输出格式，下面一行是指定具体的格式 log4j.appender.Console.layout = org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n #文件大小到达指定尺寸的时候产生一个新的文件 log4j.appender.File = org.apache.log4j.RollingFileAppender #指定输出目录 log4j.appender.File.File = logs/ssm.log #定义文件最大大小 log4j.appender.File.MaxFileSize = 10MB # 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志 log4j.appender.File.Threshold = ALL log4j.appender.File.layout = org.apache.log4j.PatternLayout log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
log4j.xml配置：
xml version="1.0" encoding="UTF-8"?>
log4j:configuration SYSTEM "http://toolkit.alibaba-inc.com/dtd/log4j/log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://jakarta.apache.org/log4j/ ">
<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%d{yyyy-MM-dd HH:mm:ss.SSS}]-[%c]-[%t] %x - %m%n"/>
layout>
appender>
<logger name="org.apache.ibatis" additivity="true">
<level value="DEBUG"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="org.mybatis.spring" additivity="true">
<level value="ERROR"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="java.sql" additivity="true">
<level value="DEBUG"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="java.sql.Connection" additivity="true">
<level value="DEBUG"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="java.sql.Statement" additivity="true">
<level value="DEBUG"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="java.sql.PreparedStatement" additivity="true">
<level value="DEBUG"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="org.springframework" additivity="true">
<level value="ERROR"/>
<appender-ref ref="consoleAppender"/>
logger>
<logger name="org.apache.activemq" additivity="true">
<level value="ERROR"/>
<appender-ref ref="consoleAppender"/>
logger>
<root>
<level value="DEBUG"/>
<appender-ref ref="consoleAppender"/>
root>
log4j:configuration>
mybatis-config.xml配置：
xml version="1.0" encoding="UTF-8" ?>
configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="logImpl" value="LOG4J" />
<setting name="cacheEnabled" value="true"/>
settings>
configuration>
spring-mvc.xml配置：
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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:component-scan base-package="com.springmvc.controller" />
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8value>
list>
property>
bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" />
list>
property>
bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
bean>
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8" />
<property name="maxUploadSize" value="10485760000" />
<property name="maxInMemorySize" value="40960" />
bean>
beans>
spring-mybatis配置
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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:component-scan base-package="com.springmvc" />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="initialSize" value="${initialSize}">property>
<property name="maxActive" value="${maxActive}">property>
<property name="maxIdle" value="${maxIdle}">property>
<property name="minIdle" value="${minIdle}">property>
<property name="maxWait" value="${maxWait}">property>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:/mybatis-config.xml">property>
<property name="mapperLocations" value="classpath:com/springmvc/mapping/*.xml">property>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.springmvc.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory">property>
bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
bean>
beans>
项目配置基本完成，接下来我们一起来看看具体实现代码：
图中箭头指向类可通过mybatis-generator Jar包和generatorConfig.xml配置文件逆向生成，具体操作详见下篇博客
Main类代码：
package com.springmvc.controller; import com.springmvc.pojo.Admin; import com.springmvc.service.AdminService; import org.apache.ibatis.annotations.Param; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import java.util.List; @Controller public class main { @Autowired private AdminService service; // @RequestMapping("/getUser") //// public String getUser(int id, HttpServletRequest request, Model model){ //// request.setAttribute("user",service.getAdmin(id)); //// model.addAttribute("user",service.getAdmin(id)); //// return "/editUser"; //// } @RequestMapping("/add") public String addUser(Admin admin,Model model){ System.out.println("ok"); service.insertAdmin(admin); return "allUser"; } @RequestMapping("/find") public String chaxun (HttpServletRequest request, Model model){ System.out.println("qian"); List userList = service.finall(); System.out.println(userList.toString()); System.out.println("hou"); model.addAttribute("userList",userList); request.setAttribute("userList",userList); return "allUser"; } @RequestMapping("/getUser") public String getUser(int id,HttpServletRequest request,Model model){ request.setAttribute("user",service.getAdmin(id)); model.addAttribute("user",service.getAdmin(id)); return "editUser"; } @RequestMapping("/updateUser") public String updateUser(Admin admin,HttpServletRequest request,Model model){ if(service.update(admin)){ admin=service.getAdmin(admin.getId()); request.setAttribute("admin",admin); model.addAttribute("admin",admin); return "redirect:/find;"; }else{ return "error"; } } @RequestMapping("/deleUser") public String deleted(int id,HttpServletRequest request,Model model){ service.delete(id); return "redirect:/find;"; } @RequestMapping("/LoginUser") public String login(Admin admin,Model model){ System.out.println(""+admin.getName()+"，，，，"+admin.getPassword()); Admin admin1=service.login(admin); System.out.println("我传值进去了"); if(admin1!=null){ System.out.println("我能判断"); return "redirect:/find;"; }else { } return "error"; } }
AdminMapper接口代码：
package com.springmvc.dao; import com.springmvc.pojo.Admin; import java.util.List; public interface AdminMapper { int deleteByPrimaryKey(Integer id); int insert(Admin record); List find(); int insertSelective(Admin record); Admin selectByPrimaryKey(Integer id); int updateByPrimaryKeySelective(Admin record); boolean updateByPrimaryKey(Admin record); Admin login(Admin a); }
AdminMapper.xml
xml version="1.0" encoding="UTF-8" ?>
mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.springmvc.dao.AdminMapper" >
<resultMap id="BaseResultMap" type="com.springmvc.pojo.Admin" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
resultMap>
<sql id="Base_Column_List" >
id, name, password
sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from admin
where id = #{id,jdbcType=INTEGER}
select>
<select id="find" resultMap="BaseResultMap" parameterType="java.lang.Integer">
select* from admin
select>
<select id="login" resultMap="BaseResultMap" parameterType="com.springmvc.pojo.Admin">
select*from admin where name=#{name} and password=#{password}
select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from admin
where id = #{id,jdbcType=INTEGER}
delete>
<insert id="insert" parameterType="com.springmvc.pojo.Admin" >
insert into admin (name, password
)
values (
#{name},#{password}
)
insert>
<insert id="insertSelective" parameterType="com.springmvc.pojo.Admin" >
insert into admin
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
if>
<if test="name != null" >
name,
if>
<if test="password != null" >
password,
if>
trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
if>
<if test="name != null" >
#{name,jdbcType=VARCHAR},
if>
<if test="password != null" >
#{password,jdbcType=VARCHAR},
if>
trim>
insert>
<update id="updateByPrimaryKeySelective" parameterType="com.springmvc.pojo.Admin" >
update admin
<set >
<if test="name != null" >
name = #{name,jdbcType=VARCHAR},
if>
<if test="password != null" >
password = #{password,jdbcType=VARCHAR},
if>
set>
where id = #{id,jdbcType=INTEGER}
update>
<update id="updateByPrimaryKey" parameterType="com.springmvc.pojo.Admin" >
update admin
set name = #{name,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
update>
mapper>
Admin
package com.springmvc.pojo; public class Admin { private Integer id; private String name; private String password; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name == null ? null : name.trim(); } public String getPassword() { return password; } public void setPassword(String password) { this.password = password == null ? null : password.trim(); } @Override public String toString() { return "Admin{" + "id=" + id + ", name='" + name + '\'' + ", password='" + password + '\'' + '}'; } }
AdminService
package com.springmvc.pojo; public class Admin { private Integer id; private String name; private String password; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name == null ? null : name.trim(); } public String getPassword() { return password; } public void setPassword(String password) { this.password = password == null ? null : password.trim(); } @Override public String toString() { return "Admin{" + "id=" + id + ", name='" + name + '\'' + ", password='" + password + '\'' + '}'; } }
ok,后台代码及配置文件已全部写完，前端页面可自行选择
注意：数据库配置文件按需求修改，Tomcat运行时一定记得把项目打包成war包
源码下载：https://download.csdn.net/download/blogsdemo/10375360（内含前端页面）