动机
使用maven已经有一段时间了,但项目是别人搭建好的,因此一直想着自己要学习搭建一下。网上找了些资料后,结合自己实验,花了点时间就搞好,老样子,写在博客上,免得日后忘记。
本文链接:http://blog.csdn.net/v123411739/article/details/50742885
博文中的MyEclipse链接:https://pan.baidu.com/s/1pMhiygz密码:mqmc
博文中的完整项目代码:https://pan.baidu.com/s/1mjsJNz6 密码:saqe
如果地址失效了,可以在文章下留言或者公众号给我发消息,我看到后会及时更新。
注:文末有直接导入项目的方法。
1.安装maven和配置(此步骤并非必须,可以根据情况选择)
1. 进入官网下载中心http://maven.apache.org/download.cgi,下载apache-maven-3.5.2-bin.zip,**-src.zip为Maven的源码
2. 配置环境变量,打开系统环境变量新建一个M2_HOME将解压后的Maven存放路径放在此,然后在path路径加入%M2_HOME%\bin路径
3. 检测是否配置成功,打开命令行输入echo %M2_HOME%查看M2_HOME指向的Maven存放安装目录是否正确,输入mvn -v查看是否能找到正确的mvn执行脚本
4. 以后升级的话将M2_HOME的路径换为最新的安装目录就行
5. Maven实践:初次安装完后输入mvn help:system的命令,此时会打印出所有的Java系统属性和环境变量,然后Maven会执行一个真正的任务将相应的所需的构件下载到本地仓库中包括pom和jar文件,然后用户在C:\Users\Administrator\.m2下就能看到本地仓库了
6. 用户需要复制M2_HOME/conf/setting.xml文件到C:/Users/Administrator/.m2/setting.xml,这样用户每次升级后就不要在次修改setting.xml文件了
1. 在本地创建一个文件夹MavenRepository,并在MavenRepository文件夹下创建文件夹repository。
2. 进入Maven解压后的文件夹,进入conf文件夹,将settings.xml文件复制到上一步创建的MavenRepository文件夹下
3. 打开MavenRepository文件夹下的settings.xml文件,找到localRepository标签,此时是被注释掉的,我们解除注释,然后配置步骤1中的repository路径,如<localRepository>F:\m2\repository</localRepository>
4. 在MyEclipse中的Perferences进行如下配置,添加自己的Maven
5. User Settings设置为之前修改过的setting.xml
6. File->New->others,搜索maven,如果看到有Maven Project则代表配置成功。
3.MyEclipse使用maven创建web项目
1、创建一个maven项目
2、按照上面教程,即可创建出一个Maven项目,项目结构如下图
3、将JRE版本设置为1.7,可使用默认的或者自己导入
4、此时index.jsp会报以下错误
在pom.xml文件的dependencies节点下添加如下代码即可,添加完后,会下载对应的jar包
5、右键项目,选择Properties,进行如下配置
4.搭建Spring+SpringMVC+Mybatis框架
1、Maven引入项目用到的jar包,修改pom.xml后保存会自动下载,存放在之前配置的本地仓库中,即:F:\m2\repository文件夹
pom.xml
<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>4.0.0</modelVersion> <groupId>com.chillax</groupId> <artifactId>Maven_Project</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>Maven_Project Maven Webapp</name> <url>http://maven.apache.org</url> <!-- 用来设置版本号 --> <properties> <spring.version>4.0.2.RELEASE</spring.version> <mybatis.version>3.2.8</mybatis.version> <slf4j.version>1.7.12</slf4j.version> <log4j.version>1.2.17</log4j.version> </properties> <!-- 用到的jar包 --> <dependencies> <!-- 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> <!-- java ee包 --> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> </dependency> <!-- spring框架包 start --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</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-expression</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <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-aspects</artifactId> <version>${spring.version}</version> </dependency> <!-- spring框架包 end --> <!-- mybatis框架包 start --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.2</version> </dependency> <!-- mybatis框架包 end --> <!-- 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>1.4</version> </dependency> <!-- jstl标签类 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <!-- log start --> <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> <!-- log END --> <!-- Json --> <!-- 格式化对象,方便输出日志 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.6</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <!-- 上传组件包 start --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency> <!-- 上传组件包 end --> <!-- AL相关添加 --> <dependency> <groupId>net.sourceforge.jexcelapi</groupId> <artifactId>jxl</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.8</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.9</version> </dependency> <!-- AL相关添加 --> </dependencies> <build> <finalName>Maven_Project</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> </plugins> </build> </project>
2、在src/main/resources下添加如下配置文件
applicationContext.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: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"> <!-- 使用注解式注入 --> <context:annotation-config /> <!-- 自动扫描 --> <context:component-scan base-package="com.chillax" /> <!-- 导入DAO配置 --> <import resource="spring-dao.xml"/> <!-- 导入数据库配置 --> <import resource="spring-db.xml"/> <!-- 导入数据库配置 --> <import resource="spring-tx.xml"/> </beans>
jdbc.properties,有多人反映直接复制时,第一行的driver最后面多了个空格,请注意
driver=com.mysql.jdbc.Driver url=jdbc:mysql://127.0.0.1:3306/maventest 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
#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
spring-dao.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: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"> <!-- DAO接口所在包名,Spring会自动查找其下的类 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--basePackage指定要扫描的包,在此包之下的映射器都会被搜索到。 可指定多个包,包与包之间用逗号或分号分隔--> <property name="basePackage" value="com.chillax.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> </beans>
spring-db.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: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"> <!-- 引入配置文件 --> <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="${password}" /> <!-- 初始化连接大小 --> <property name="initialSize" value="${initialSize}"></property> <!-- 连接池最大数量 --> <property name="maxActive" value="${maxActive}"></property> <!-- 连接池最大空闲 --> <property name="maxIdle" value="${maxIdle}"></property> <!-- 连接池最小空闲 --> <property name="minIdle" value="${minIdle}"></property> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="${maxWait}"></property> </bean> <!-- spring和MyBatis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" /> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:com/chillax/mapper/*.xml"></property> </bean> </beans>
spring-tx.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd"> <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置参与事务的类 --> <aop:config> <aop:pointcut id="allServiceMethod" expression="execution(* com.chillax.service.*.*(..))"/> <aop:advisor pointcut-ref="allServiceMethod" advice-ref="TxAdvice" /> </aop:config> <!-- 使用声明方式配置事务 --> <tx:advice id="TxAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="*" propagation="REQUIRED" rollback-for="java.lang.Exception"/> </tx:attributes> </tx:advice> </beans>
spring-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: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"> <!-- 添加注解驱动 --> <mvc:annotation-driven /> <mvc:default-servlet-handler/> <!-- 设置使用注解的类所在的包 --> <context:component-scan base-package="com.chillax.controller" /> <!-- 定义跳转的文件的前后缀 ,视图模式配置--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 --> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- SpringMVC上传文件时,需要配置MultipartResolver处理器--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --> <property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --> <property name="maxInMemorySize" value="40960" /> </bean> </beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>Archetype Created Web Application</display-name> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <!-- 加载spring bean --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 编码过滤器 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <async-supported>true</async-supported> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring MVC servlet --> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/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>/</url-pattern> </servlet-mapping> </web-app>
UserController.java
package com.chillax.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import com.chillax.dto.User; import com.chillax.service.IUserService; @Controller @RequestMapping("/user") public class UserController { @Resource private IUserService userService; @RequestMapping("/userList") public String userList(HttpServletRequest request,Model model){ List<User> uList = userService.getAllUser(); model.addAttribute("uList", uList); return "userList"; } @RequestMapping("/showUser") public String showUser(HttpServletRequest request,Model model){ int userId = Integer.parseInt(request.getParameter("id")); User user = userService.getUserById(userId); model.addAttribute("user", user); return "showUser"; } @RequestMapping("/addUserUI") public String addUserUI(){ return "addUser"; } @RequestMapping("/addUser") public String addUser(HttpServletRequest request,Model model){ User user = new User(); user.setName(String.valueOf(request.getParameter("name"))); user.setPassword(String.valueOf(request.getParameter("password"))); user.setAge(Integer.parseInt(String.valueOf(request.getParameter("age")))); userService.addUser(user); return "redirect:/user/userList"; } }
IUserDao.java
package com.chillax.dao; import java.util.List; import java.util.Map; import com.chillax.dto.User; public interface IUserDao { public User queryByPrimaryKey(Integer id); public List<User> getAllUser(); public void insertUser(User user); public void insertUserByBatch(List<User> list); public void deleteByPrimaryKey(Integer id); public void delteUserByBatch(Map<String,Object> params); public void updateByPrimaryKey(User user); }
User.java
package com.chillax.dto; public class User { private Integer id; private String name; private String password; private Integer age; 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; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password == null ? null : password.trim(); } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } }
UserMapper.xml
<?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.chillax.dao.IUserDao" > <resultMap id="BaseResultMap" type="com.chillax.dto.User"> <result column="id" property="id" jdbcType="INTEGER" /> <result column="name" property="name" jdbcType="VARCHAR" /> <result column="password" property="password" jdbcType="VARCHAR" /> <result column="age" property="age" jdbcType="INTEGER" /> </resultMap> <sql id="Base_Column_List"> id, name, password, age </sql> <!-- 查询用户--> <select id="queryByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer"> select <include refid="Base_Column_List" /> from user where id = #{id,jdbcType=INTEGER} </select> <!-- 查询用户--> <select id="getAllUser" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from user </select> <!-- 插入用户 --> <insert id="insertUser" parameterType="com.chillax.dto.User"> insert into user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="id != null" > id, </if> <if test="name != null" > name, </if> <if test="password != null" > password, </if> <if test="age != null" > age, </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> <if test="age != null" > #{age,jdbcType=INTEGER}, </if> </trim> </insert> <!-- 批量插入用户 --> <insert id="insertUserByBatch" parameterType="java.util.List" > insert into USER (ID, NAME, PASSWORD, AGE) select A.* from ( <foreach collection="list" item="user" index="index" separator="union"> select #{user.id,jdbcType=INTEGER}, #{user.name,jdbcType=VARCHAR}, #{user.password,jdbcType=VARCHAR}, #{user.age,jdbcType=INTEGER} from dual </foreach> ) A </insert> <!-- 删除用户 --> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer"> delete from user where id = #{id,jdbcType=INTEGER} </delete> <!-- 批量删除用户 --> <delete id="deleteUserByBatch" parameterType="java.util.Map" > delete from user where id IN <foreach item="ids" collection="iList" open="(" separator="," close=")"> #{ids,jdbcType=DECIMAL} </foreach> </delete> <!-- 更新用户 --> <update id="updateByPrimaryKey" parameterType="com.chillax.dto.User" > update user <set > <if test="name != null" > name = #{name,jdbcType=VARCHAR}, </if> <if test="password != null" > password = #{password,jdbcType=VARCHAR}, </if> <if test="age != null" > age = #{age,jdbcType=INTEGER}, </if> </set> where id = #{id,jdbcType=INTEGER} </update> </mapper>
IUserService.java
package com.chillax.service; import java.util.List; import com.chillax.dto.User; public interface IUserService { public User getUserById(int userId); public void insertUser(User user); public void addUser(User user); public List<User> getAllUser(); }
UserServiceImpl.java
package com.chillax.service.Impl; import java.util.List; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.chillax.dao.IUserDao; import com.chillax.dto.User; import com.chillax.service.IUserService; @Service("userService") public class UserServiceImpl implements IUserService { @Resource private IUserDao userDao; public User getUserById(int userId) { return userDao.queryByPrimaryKey(userId); } public void insertUser(User user) { userDao.insertUser(user); } public void addUser(User user) { userDao.insertUser(user); } @Override public List<User> getAllUser() { return userDao.getAllUser(); } }
5、在WEB-INF文件夹下创建jsp文件夹,并添加userList.jsp,showUser.jsp、addUser.jsp
userList.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'showUser.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <c:forEach items="${uList }" var="u"> 用户名称:${u.name} 用户年龄:${u.age } <br/> </c:forEach> </body> </html>
addUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'addUser.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form id="addUser" action="user/addUser" method="post"> userName: <input id="name" name="name" /><br/> password: <input id="password" name="password" /><br/> age: <input id="age" name="age"/><br/> <input type="submit" value="添加新用户"/> </form> </body> </html>
showUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'showUser.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> ${user.name }<br> </body> </html>
create database maventest; use maventest; CREATE TABLE `user` ( `id` int(12) NOT NULL AUTO_INCREMENT, `name` varchar(50) NOT NULL, `password` varchar(50) NOT NULL, `age` int(9) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8; insert into `user`(`id`,`name`,`password`,`age`) values (1,'admin','admin',22);
至此,框架搭建完成。
解答:http://www.mvnrepository.com/
解决:在MyEclipse的安装目录找到myeclipse.ini,将分配的堆内存加大
问题3:新建完工程后出现以下错误?
解答:在pom.xml添加以下代码即可,添加完代码就会自动下载好jar包
解答:这是由于jar包没有正确下载导致的,找到错误的jar包位置,将文件夹里的文件删掉,将pom.xml里该jar包的配置代码删除后再重新写上,让MAVEN重新下载jar包即可。
解答:
解答:将项目的jre版本换成1.7或者以上的版本即可
问题7:出现以下错误,并且已经确定jre是1.7版本或者以上版本。
解答:在pom.xml文件的<build></build>的标签中加入以下代码,然后Update Project(参照问题5)
<build> <finalName>Maven_Project</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> </plugins> </build>
解答:请确认地址中的项目,跟项目中的Web Context-root地址一致。
解答:如果想直接导入代码需要先做文章开头的1和2两步,即用一个自己的新的仓库来存储jar包,不然容易跟已有的仓库配置冲突,导致jar包无法下载或下载不全。下图是我导入的过程,下载jar的过程比较慢,并且下载完了还报错,但是报错并不影响项目的正确运行。