利用idea创建一个基本的smm项目（带增删改查）
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2022-04-17 21:07:12
环境 idea jdk1.8 tomcat mysql 打开idea选择创建一个maven项目 然后点击next，next，finsh 然后看项目的结构 如图所示 接着创建com包，再在com包下新建四个包，分别命名为： 自定义pom.xml 在resource包下新建Directory:mappe ......
环境 idea jdk1.8 tomcat mysql
打开idea选择创建一个maven项目
然后点击next，next，finsh
然后看项目的结构
如图所示
接着创建com包，再在com包下新建四个包，分别命名为：
自定义pom.xml
<?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.li</groupid>
<artifactid>ssm_test_2</artifactid>
<version>1.0-snapshot</version>
<packaging>war</packaging>
<name>ssm_test_2 maven webapp</name>
<!-- 用来设置版本号 -->
<properties>
<srping.version>4.0.2.release</srping.version>
<mybatis.version>3.2.8</mybatis.version>
<slf4j.version>1.7.12</slf4j.version>
<log4j.version>1.2.17</log4j.version>
<druid.version>1.0.9</druid.version>
</properties>
<!-- 用到的jar包 -->
<dependencies>
<!-- servlet依赖的jar包start -->
<dependency>
<groupid>javax.servlet</groupid>
<artifactid>javax.servlet-api</artifactid>
</dependency>
<!-- servlet依赖的jar包start -->
<!-- jsp依赖jar包start -->
<dependency>
<groupid>javax.servlet.jsp</groupid>
<artifactid>javax.servlet.jsp-api</artifactid>
<version>2.3.1</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupid>junit</groupid>
<artifactid>junit</artifactid>
<version>4.11</version>
<!-- 表示开发的时候引入，发布的时候不会加载此包 -->
<scope>test</scope>
</dependency>
<!-- spring框架包 -->
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-test</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-core</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-oxm</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-tx</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-jdbc</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-aop</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-context</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-context-support</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-expression</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-orm</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-web</artifactid>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupid>org.springframework</groupid>
<artifactid>spring-webmvc</artifactid>
<version>${srping.version}</version>
</dependency>
<!-- spring框架包 -->
<!-- mybatis框架包 -->
<dependency>
<groupid>org.mybatis</groupid>
<artifactid>mybatis</artifactid>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupid>org.mybatis</groupid>
<artifactid>mybatis-spring</artifactid>
<version>1.2.2</version>
</dependency>
<!-- mybatis框架包 -->
<!-- 数据库驱动 -->
<dependency>
<groupid>mysql</groupid>
<artifactid>mysql-connector-java</artifactid>
<version>5.1.35</version>
</dependency>
<!-- 导入dbcp的jar包，用来在applicationcontext.xml中配置数据库 -->
<dependency>
<groupid>commons-dbcp</groupid>
<artifactid>commons-dbcp</artifactid>
<version>1.2.2</version>
</dependency>
<!-- jstl标签类 -->
<dependency>
<groupid>jstl</groupid>
<artifactid>jstl</artifactid>
<version>1.2</version>
</dependency>
<!-- log -->
<dependency>
<groupid>log4j</groupid>
<artifactid>log4j</artifactid>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupid>org.slf4j</groupid>
<artifactid>slf4j-api</artifactid>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupid>org.slf4j</groupid>
<artifactid>slf4j-log4j12</artifactid>
<version>${slf4j.version}</version>
</dependency>
<!-- 连接池 -->
<dependency>
<groupid>com.alibaba</groupid>
<artifactid>druid</artifactid>
<version>${druid.version}</version>
</dependency>
</dependencies>
<build>
<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
<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>
<!-- java编译插件,如果maven的设置里配置好jdk版本就不用 -->
<plugins>
<plugin>
<groupid>org.apache.maven.plugins</groupid>
<artifactid>maven-compiler-plugin</artifactid>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
在resource包下新建directory:mapper(用来放xxmapper.xml)
添加jdbc.properties和lo4j.properties文件
jdbc.properties
driver=com.mysql.jdbc.driver url=jdbc\:mysql\://localhost\:3306/test username=root password=123456 initialsize=0 maxactive=20 maxidle=20 minidle=1 maxwait=60000
lo4j.properties文件
log4j.rootlogger=debug,console,file
#log4j.rootlogger=error,rolling_file
log4j.logger.com.qhit.dao=debug
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.simpledatasource=debug
log4j.logger.com.ibatis.common.jdbc.scriptrunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.sqlmapclientdelegate=debug
log4j.logger.java.sql.connection=debug
log4j.logger.java.sql.statement=debug
log4j.logger.java.sql.preparedstatement=debug
log4j.logger.java.sql.resultset=debug
log4j.logger.org.tuckey.web.filters.urlrewrite.urlrewritefilter=debug
######################################################################################
# console appender 日志在控制输出配置
######################################################################################
log4j.appender.console=org.apache.log4j.consoleappender
log4j.appender.threshold=error
log4j.appender.console.target=system.out
log4j.appender.console.layout=org.apache.log4j.patternlayout
log4j.appender.console.layout.conversionpattern= [%p] %d %c - %m%n
######################################################################################
# dailyrolling file 每天产生一个日志文件，文件名格式:log2009-09-11
######################################################################################
log4j.appender.file=org.apache.log4j.dailyrollingfileappender
log4j.appender.file.datepattern=yyyy-mm-dd
log4j.appender.file.file=log.log
log4j.appender.file.append=true
log4j.appender.file.threshold=error
log4j.appender.file.layout=org.apache.log4j.patternlayout
log4j.appender.file.layout.conversionpattern=%d{yyyy-m-d hh:mm:ss}%x[%5p](%f:%l) %m%n
log4j.logger.com.opensymphony.xwork2=error
然后创建applicationcontext.xm
<?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:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemalocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 加载properties文件 -->
<bean id="propertyconfigurer" class="org.springframework.beans.factory.config.propertyplaceholderconfigurer">
<property name="location" value="classpath:jdbc.properties"/>
</bean>
<!-- 配置数据源 -->
<bean id="datasource" class="org.apache.commons.dbcp.basicdatasource">
<property name="driverclassname" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</bean>
<!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlsessionfactory" class="org.mybatis.spring.sqlsessionfactorybean">
<property name="datasource" ref="datasource"/>
<!-- 扫描model包 -->
<property name="typealiasespackage" value="com.lwy.pojo"/>
<!-- 扫描sql配置文件:mapper需要的xml文件-->
<property name="mapperlocations" value="classpath:mapper/*.xml"/>
</bean>
<!-- mapper动态代理开发，扫描dao接口包-->
<bean class="org.mybatis.spring.mapper.mapperscannerconfigurer">
<!-- 注入sqlsessionfactory -->
<property name="sqlsessionfactorybeanname" value="sqlsessionfactory"/>
<!-- 给出需要扫描dao接口包 -->
<property name="basepackage" value="com.lwy.mapper"/>
</bean>
<!-- 事务管理 -->
<bean id="transactionmanager" class="org.springframework.jdbc.datasource.datasourcetransactionmanager">
<!--数据库连接池-->
<property name="datasource" ref="datasource"/>
</bean>
</beans>
创建sping-mvc.xml
<?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
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<!-- 扫描注解，这样com.xjt包下的文件都能被扫描 -->
<context:component-scan base-package="com.lwy"/>
<!-- 开启springmvc注解模式 -->
<mvc:annotation-driven/>
<!-- 静态资源默认servlet配置 -->
<mvc:default-servlet-handler/>
<!-- 配置返回视图的路径，以及识别后缀是jsp文件 -->
<bean class="org.springframework.web.servlet.view.internalresourceviewresolver">
<property name="viewclass" value="org.springframework.web.servlet.view.jstlview"/>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
接着在webapp下web-inf配置web.xml
<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_3_1.xsd"
version="3.1">
<display-name>mvcdemo</display-name>
<welcome-file-list>
<welcome-file>/pages/index.jsp</welcome-file>
</welcome-file-list>
<!-- 注册servletcontext监听器，创建容器对象，并且将applicationcontext对象放到application域中 -->
<listener>
<listener-class>org.springframework.web.context.contextloaderlistener</listener-class>
</listener>
<!-- 指定spring核心配置文件 -->
<context-param>
<param-name>contextconfiglocation</param-name>
<param-value>classpath:applicationcontext.xml</param-value>
</context-param>
<!-- 解决乱码的过滤器 -->
<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>
<!-- 配置前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.dispatcherservlet</servlet-class>
<!-- 指定配置文件位置和名称 如果不设置,默认找/web-inf/<servlet-name>-servlet.xml -->
<init-param>
<param-name>contextconfiglocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
数据库创建一个表
drop table if exists `user`; create table `user` ( `id` varchar(200) not null, `name` varchar(200) character set utf8 not null, `pwd` varchar(200) character set utf8 not null ) engine=innodb default charset=latin1;
可以先添加数据方便测试
insert into `user` values ('2', '22', '44');
insert into `user` values ('5', '123', '123');
insert into `user` values ('1', '123s', '123');
开始编写代码
pojo代码
package com.lwy.pojo;
public class user {
private string id;
public string getid() {
return id;
}
public void setid(string id) {
this.id = id;
}
private string name;
private string pwd;
public string getname() {
return name;
}
public void setname(string name) {
this.name = name;
}
public string getpwd() {
return pwd;
}
public void setpwd(string pwd) {
this.pwd = pwd;
}
}
mapper
package com.lwy.mapper;
import com.lwy.pojo.user;
import org.apache.ibatis.annotations.param;
import java.util.list;
public interface usermapper {
user userlogin(@param("name")string name, @param("pwd") string pwd);
int adduser(user user);
int delteuser(string id);
int updateuser(user user);
user getbyid(string id);
list<user> getalluser();
}
xxmapper.xml
<?xml version="1.0" encoding="utf-8"?>
<!doctype mapper system "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.lwy.mapper.usermapper">
<resultmap id="resultmap" type="user">
<id property="userid" column="user_id"></id>
<result property="name" column="name"></result>
<result property="pwd" column="pwd"></result>
</resultmap>
<select id="userlogin" resulttype="user">
select * from `user` where `name`=#{name} and pwd=#{pwd}
</select>
<insert id="adduser" parametertype="user">
insert into user(id,name,pwd) values(#{id},#{name},#{pwd})
</insert>
<delete id="delteuser" parametertype="string">
delete from user where id=#{id}
</delete>
<update id="updateuser" parametertype="user">
update user set name=#{name}, pwd=#{pwd} where id=#{id}
</update>
<select id="getbyid" parametertype="string" resultmap="resultmap">
select * from user where id=#{id}
</select>
<select id="getalluser" resultmap="resultmap">
select * from user
</select>
</mapper>
service层
package com.lwy.service;
import com.lwy.pojo.user;
import org.apache.ibatis.annotations.param;
import java.util.list;
public interface userservice {
user userlogin(@param("name") string name, @param("pwd") string pwd);
int adduser(user user);
int delteuser(string id);
int updateuser(user user);
user getbyid(string id);
list<user> getalluser();
}
实现
package com.lwy.service.impl;
import com.lwy.pojo.user;
import com.lwy.mapper.usermapper;
import com.lwy.service.userservice;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import java.util.list;
import java.util.uuid;
@service
public class userserviceimpl implements userservice {
@autowired
usermapper usermapper;
@override
public int adduser(user user) {
string id = uuid.randomuuid().tostring();
user.setid(id);
return usermapper.adduser(user);
}
@override
public int delteuser(string id) {
return usermapper.delteuser(id);
}
@override
public int updateuser(user user) {
return usermapper.updateuser(user);
}
@override
public user getbyid(string id) {
return usermapper.getbyid(id);
}
@override
public list<user> getalluser() {
return usermapper.getalluser();
}
@override
public user userlogin(string name, string pwd) {
return usermapper.userlogin(name, pwd);
}
}
controller层
package com.lwy.controller;
import com.lwy.pojo.user;
import com.lwy.service.userservice;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.controller;
import org.springframework.ui.model;
import org.springframework.web.bind.annotation.requestmapping;
import java.util.list;
@controller
public class usercontroller {
@autowired
userservice userservice;
@requestmapping("/login.do")
public string login(string username, string password,model model){
system.out.println("开始登陆");
userservice.userlogin(username,password);
// system.out.println("开始查询所有用户");
// list<user> userlist = userservice.getalluser();
// model.addattribute("userlist",userlist);
return "redirect:/getalluser.do";
}
@requestmapping("/adduser.do")
public string adduser(user user){
userservice.adduser(user);
return "redirect:/getalluser.do";
}
@requestmapping("/deleteuser.do")
public string deleteuser(string id){
userservice.delteuser(id);
return "redirect:/getalluser.do";
}
@requestmapping("/updateuser.do")
public string updateuser(user user){
userservice.updateuser(user);
return "redirect:/getalluser.do";
}
@requestmapping("/getbyid.do")
public string getuserbyid(string id,model model){
model.addattribute("user",userservice.getbyid(id));
return "pages/user_update";
}
@requestmapping("/getalluser.do")
public string getalluser(model model){
system.out.println("开始查询所有用户");
list<user> userlist = userservice.getalluser();
model.addattribute("userlist",userlist);
return "pages/userlist";
}
}
部署到tomcat中
如图
选择本地的tomcat
页面
登陆
<%--
created by intellij idea.
user: hasee
date: 2019/6/3
time: 16:03
to change this template use file | settings | file templates.
--%>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
<title>title</title>
</head>
<body>
<form action="../login.do" method="post">
账号：<input type="text" name="username" />
密码：<input type="password" name="password" />
<button type="submit">提交</button>
</form>
</body>
</html>
显示
<%--
created by intellij idea.
user: hasee
date: 2019/6/3
time: 18:27
to change this template use file | settings | file templates.
--%>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>title</title>
</head>
<body>
列表
<a href="/pages/user_add.jsp">添加</a>
<a href="/pages/logout.do">退出</a>
<a href="/pages/admin.jsp">admin page</a>
<table>
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>操作</td>
</tr>
<c:foreach items="${requestscope.userlist}" var="list">
<tr>
<td>${list.id}</td>
<td>${list.name}</td>
<td>${list.pwd}</td>
<td>
<a href="../getbyid.do?id=${list.id}">修改</a>
<a href="../deleteuser.do?id=${list.id}">删除</a>
</td>
</tr>
</c:foreach>
</table>
</body>
</html>
添加
<%--
created by intellij idea.
user: hasee
date: 2019/6/3
time: 20:18
to change this template use file | settings | file templates.
--%>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
<title>title</title>
</head>
<body>
<form method="post" action="../adduser.do">
你的账号<input type="text" name="name">
你的密码<input type="text" name="pwd" />
<button type="submit">保存</button>
</form>
</body>
</html>
修改
<%--
created by intellij idea.
user: hasee
date: 2019/6/3
time: 20:18
to change this template use file | settings | file templates.
--%>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>title</title>
</head>
<body>
<form method="post" action="../updateuser.do">
<input type="hidden" name="id" value="${requestscope.user.id}"/>
gfdshjsahsdhsdhsdhsd
你的账号<input type="text" name="name" value="${requestscope.user.name}"/>
你的密码<input type="text" name="pwd" value="${requestscope.user.pwd}"/>
<button type="submit">修改</button>
</form>
</body>
</html>
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