一、前言
本篇内容是培训作业的第一个任务,旨在搭建一个SSM框架,做一个HTML页面,能查询,能插入数据(新建用户)、登陆。实现的功能最为基础,但是要求所有代码均为手写,不能使用Mybatis 自动生成mapping和dao。由于此框架是后面一系列任务的基础,所以,还是有必要完整的记录下所有的细节过程,一方面希望帮助有需要的同学,另一方面也做一个阶段性的总结与回顾。
二、环境相关介绍
2.1 环境介绍
环境:jdk1.8 + Spring(4.3.10) + Mybatis(3.2.7) + apache-tomcat(8.0.52) + MySQL(5.1.21) + Oracle(11.2.0.3)
注意!Oracle ojdbc6 需要手动下载安装,下载地址为:https://mvnrepository.com/artifact/oracle/ojdbc6/11.2.0.3
在maven添加内容后,点击下图所示下载jar包。
2.2 项目代码说明
此项目代码已经上传到GitHub,由于后续任务的推进也会不定时更新。
三、搭建SSM框架
3.1 创建maven项目
参考文章: https://blog.csdn.net/zhshulin/article/details/37921705
3.2 完整项目结构
完整的项目结构如上图所示,包括基本的框架部分、配置文件部分、测试部分、前端部分等内容。
3.3 引入maven jar包
<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.lixj.work</groupId>
<artifactId>task_one</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<!-- spring版本号 -->
<spring.version>4.3.10.RELEASE</spring.version>
<!-- mybatis版本号 -->
<mybatis.version>3.2.7</mybatis.version>
<!-- log4j日志文件管理包版本 -->
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</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-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>0.2.9</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.7.1</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.11</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.26</version>
</dependency>
<dependency>
<groupId> org.aspectj</groupId >
<artifactId> aspectjweaver</artifactId >
<version> 1.8.7</version >
</dependency>
<dependency>
<groupId>jdk.tools</groupId>
<artifactId>jdk.tools</artifactId>
<version>1.8</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jr</groupId>
<artifactId>jackson-jr-all</artifactId>
<version>2.5.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jgroups/jgroups -->
<dependency>
<groupId>org.jgroups</groupId>
<artifactId>jgroups</artifactId>
<version>4.0.12.Final</version>
</dependency>
<dependency>
<groupId>com.thetransactioncompany</groupId>
<artifactId>jsonrpc2-client</artifactId>
<version>1.15</version>
</dependency>
</dependencies>
<build>
<finalName>task_one</finalName>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
3.4 Spring与MyBatis的整合
所有需要的JAR包都引入以后,首先进行Spring与MyBatis的整合,然后再进行JUnit测试效果。
3.4.1 配置文件相关内容
jdbc.properties
该文件主要功能:数据库连接资源相关。
#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
# MySQL数据库连接配置
validationQuery=SELECT 1
jdbc_url=jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=UTF-8
jdbc_username=root
jdbc_password=123456789
jdbc_driver=com.mysql.jdbc.Driver
# Oracle数据库连接配置
#validationQuery=SELECT 1 FROM DUAL
#jdbc_url=jdbc:oracle:thin:@192.168.1.2:1521:orcl
#jdbc_username=scott
#jdbc_password=123456789
#jdbc_driver=oracle.jdbc.driver.OracleDriver
log4j.properties
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.xml
该文件主要功能:引入配置属性文件、自动扫描。
<?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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
">
<!-- 引入数据库配置属性文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!-- 自动扫描(自动注入) -->
<context:component-scan base-package="com.service" />
</beans>
spring-mybatis.xml
该文件主要功能:整合spring和mybatis、配置数据源、自动扫描、自动注入。
<?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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
">
<!-- 配置数据源 -->
<bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="driverClassName" value="${jdbc_driver}"/>
<property name="url" value="${jdbc_url}" />
<property name="username" value="${jdbc_username}" />
<property name="password" value="${jdbc_password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大使用连接数量 -->
<property name="maxActive" value="${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="${maxWait}"></property>
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒,也就是30分钟 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true" />
<!-- 监控数据库 -->
<property name="filters" value="mergeStat" />
</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entity目录, 省掉Configuration.xml里的手工配置 -->
<property name="mapperLocations" value="classpath:com/mapping/*.xml" />
</bean>
<!-- DAO接口所在包名,Spring会自动查找其下的类。采用包扫描的方式配置 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 注解方式配置事物 -->
<!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
<!-- 拦截器方式配置事物 -->
<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="append*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="modify*" propagation="REQUIRED" />
<tx:method name="edit*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="remove*" propagation="REQUIRED" />
<tx:method name="repair" propagation="REQUIRED" />
<tx:method name="delAndRepair" propagation="REQUIRED" />
<tx:method name="get*" propagation="SUPPORTS" />
<tx:method name="find*" propagation="SUPPORTS" />
<tx:method name="load*" propagation="SUPPORTS" />
<tx:method name="search*" propagation="SUPPORTS" />
<tx:method name="datagrid*" propagation="SUPPORTS" />
<tx:method name="*" propagation="SUPPORTS" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* sy.service..*Impl.*(..))" />
<aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
</aop:config>
<!-- 配置druid监控spring jdbc -->
<bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
</bean>
<bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">
<property name="patterns">
<list>
<value>com.service.*</value>
<value>com.serviceImpl.*</value>
</list>
</property>
</bean>
<aop:config>
<aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
</aop:config>
</beans>
3.4.2 JUnit测试
3.4.2.1 创建测试用表:
注意!MySQL与Oracle中,设置主键方式不同,MySQL中直接指定字段id AUTO_INCREMENT为自增主键,Oracle中则需要触发器或自增序列设置自增主键。
CREATE TABLE `user` (
`id` INT (11) NOT NULL AUTO_INCREMENT,
`user_name` VARCHAR (40) NOT NULL,
`user_password` VARCHAR (255) NOT NULL
PRIMARY KEY (`id`)
) ENGINE = INNODB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8;
INSERT INTO `user` VALUES ('1', '张三', '11111');
3.4.3.2 创建实体类、MyBatis映射文件以及DAO接口
此部分对应内容为如下,由于是手写,没有采用MyBatis Generator自动创建代码,所以mapping只测试了四个功能。
具体内容见GitHub
3.4.3.3 创建Service接口及其实现类
此部分对应内容为如下:
具体内容如下:
UserService.java
package com.service;
import java.util.List;
import com.model.User;
public interface UserService {
public User getUserById(int id);
public boolean regist(String username, String password);
public boolean login(String username, String password);
public List<User> selectAll();
}
UserServiceImpl.java
package com.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.dao.UserDao;
import com.model.User;
import com.service.UserService;
@Service("userService")
public class UserServiceImpl implements UserService {
@Resource
private UserDao userDao;
public User getUserById(int id) {
// TODO Auto-generated method stub
return this.userDao.selectByPrimaryKey(id);
}
@Override
public boolean regist(String username, String password) {
System.out.println("==========");
System.out.println("userServiceImpl, regist: " + username + password);
System.out.println("输入的账号:" + username + "输入的密码:" + password);
if (username==""||password=="") {
return false;
}else {
userDao.addUser(username, password);
return true;
}
}
@Override
public boolean login(String username, String password) {
System.out.println("==========");
System.out.println("userServiceImpl, login: " + username + password);
System.out.println("输入的账号:" + username + "输入的密码:" + password);
User user = userDao.findUserByNameAndPwd(username, password);
if (user != null) {
if (user.getUser_name().equals(username) && user.getUser_password().equals(password)) {
return true;
}
}
return false;
}
@Override
public List<User> selectAll() {
return this.userDao.selectAllUser();
}
}
3.4.3.3 创建测试用例
此部分对应内容为如下:
测试类中采用注解的方式来引入配置文件和类,然后再将service接口对象注入,就可以进行测试了。测试成功则表示Spring和Mybatis整合成功。输出信息使用的是Log4j打印到控制台。
测试类如下:
package com.test;
import javax.annotation.Resource;
import org.apache.log4j.Logger;
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 com.alibaba.fastjson.JSON;
import com.model.User;
import com.service.UserService;
/**
* @ClassName: testweb
* @Description: TODO
* @author: li_xj
* @date: 2018年9月16日 上午12:07:55
*
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:spring.xml", "classpath:spring-mybatis.xml" })
public class testweb {
private static Logger logger = Logger.getLogger(testweb.class);
@Resource
private UserService userService;
@Test(expected=java.lang.ArithmeticException.class)
public void test1() {
System.out.println("test1");
User user = userService.getUserById(1);
logger.info(JSON.toJSONString(user));
}
}
测试结果:
至此,整合完成Spring和mybatis两大框架。
3.5 整合SpringMVC
3.5.1 配置spring-mvc.xml
spring-mvc.xml
该文件主要功能:自动扫描控制器,设置静态资源,启动注解功能,设置视图解析器。
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" 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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<!-- 默认的注解映射的支持 -->
<mvc:annotation-driven />
<!-- 解决:No mapping found for HTTP request with URI的问题 -->
<mvc:default-servlet-handler />
<!-- 基于注解的Handler配置 自动扫描controller包下的所有类,使其认为spring mvc的控制器 -->
<context:component-scan base-package="com.controller" />
<!-- 静态资源存在时候不进行映射,表示WEB-VENDER下的东西都是静态资源 -->
<mvc:resources mapping="/WEB-VENDER/**" location="/WEB-VENDER/" />
<!--
2,3. 启动Spring MVC的注解功能,完成请求和注解POJO的映射
AnnotationMethodHandlerAdapter与RequestMappingHandlerAdapter
为 spring mvc 支持类注解和方法级别注解的两个处理类
-->
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>
<bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean>
<!-- 4. 视图解析器 对模型视图名称的解析,即在模型视图名称添加前后缀 解析jsp解析,默认使用jstl标签,classpath下的得有jstl的包 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/html/" p:suffix=".html" />
<!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="text" />
<constructor-arg index="1" value="plain" />
<constructor-arg index="2" value="UTF-8" />
</bean>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="*" />
<constructor-arg index="1" value="*" />
<constructor-arg index="2" value="UTF-8" />
</bean>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="text" />
<constructor-arg index="1" value="*" />
<constructor-arg index="2" value="UTF-8" />
</bean>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="application" />
<constructor-arg index="1" value="json" />
<constructor-arg index="2" value="UTF-8" />
</bean>
</list>
</property>
</bean>
</beans>
3.5.2 配置web.xml
该文件主要功能:配置的spring-mvc的Servlet、对spring.xml与spring-mybatis.xml的引入。
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:web="http://java.sun.com/xml/ns/javaee" 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" id="WebApp_ID" version="3.0">
<display-name>maven-web-demo</display-name>
<servlet>
<description>spring mvc servlet</description>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<description>spring mvc 的配置文件:spring-mvc.xml</description>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.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>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
<welcome-file>/index.html</welcome-file>
<welcome-file>/index.htm</welcome-file>
<welcome-file>/default.html</welcome-file>
<welcome-file>/default.htm</welcome-file>
<welcome-file>/default.jsp</welcome-file>
</welcome-file-list>
<display-name>mybatis</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value>
</context-param>
<context-param>
<param-name>spring.profiles.active</param-name>
<param-value>dev</param-value>
</context-param>
<context-param>
<param-name>spring.profiles.default</param-name>
<param-value>dev</param-value>
</context-param>
<context-param>
<param-name>spring.liveBeansView.mbeanDomain</param-name>
<param-value>dev</param-value>
</context-param>
<filter>
<description>字符集过滤器</description>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<description>字符集编码</description>
<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>
<listener>
<description>spring监听器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
3.5.3 建立UserController类
UserController.java
package com.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.model.User;
import com.service.UserService;
/**
*
* @ClassName: userController
* @Description: TODO
* @author: li_xj
* @date: 2018年9月15日 下午4:20:53
*
*/
@Controller
@RequestMapping("/user")
public class UserController {
private UserService userService;
public UserService getUserService() {
return userService;
}
@Autowired
public void setUserService(UserService userService) {
this.userService = userService;
}
//测试
@RequestMapping(value="/showUser/{id}", method=RequestMethod.GET)
public String showUser(@PathVariable int id, HttpServletRequest request) {
System.out.println(id);
User user = userService.getUserById(id);
System.out.println(user);
request.setAttribute("user", user);
return "showUser";
}
//正常访问new_user页面
@RequestMapping("/index")
public String index(){
return "index";
}
//正常访问system_index页面
@RequestMapping("/system_index")
public String system_index(){
return "system_index";
}
//验证regist
@RequestMapping(value="/checkRegist", method=RequestMethod.POST, produces="text/html;charset=UTF-8;")
@ResponseBody //只返回数据,不返回页面
public String checkRegist(HttpServletRequest request, @RequestBody String user) {
System.out.println("==========");
String[] strs=user.split("\"");
String username = strs[3];
String password = strs[7];
System.out.println("用户注册:" + username + password);
boolean registType = userService.regist(username, password);
JSONObject jsonObject = new JSONObject();
if (registType) {
jsonObject.put("message", "注册成功!");
return jsonObject.toJSONString();
}else{
jsonObject.put("message", "注册失败!");
return jsonObject.toJSONString();
}
}
//验证login
@RequestMapping(value="/checkLogin", method=RequestMethod.POST, produces="text/html;charset=UTF-8;")
@ResponseBody
public String checkLogin(HttpServletRequest request, @RequestBody String user) {
System.out.println("==========");
String[] strs=user.split("\"");
String username = strs[3];
String password = strs[7];
System.out.println("用户登录:" + username + password);
boolean loginType = userService.login(username, password);
System.out.println(loginType);
JSONObject jsonObject = new JSONObject();
if(loginType){
jsonObject.put("message", "true");
return jsonObject.toJSONString();
}else{
jsonObject.put("message", "fail");
return jsonObject.toJSONString();
}
}
// 查询所有用户
@RequestMapping(value="/selectAllUser", method=RequestMethod.POST, produces="text/html;charset=UTF-8;")
@ResponseBody
public String selectAllUser(HttpServletRequest request) {
System.out.println("=====选择所有用户======");
List<User> userList = userService.selectAll();
JSONArray jsonArray = new JSONArray();
for(User user:userList) {
JSONObject jsonObject = new JSONObject();
jsonObject.put("id", user.getId());
jsonObject.put("user_name", user.getUser_name());
jsonObject.put("user_password", user.getUser_password());
jsonArray.add(jsonObject);
}
System.out.println(jsonArray);
return jsonArray.toJSONString();
}
}
3.5.4 新建前端部分
3.5.4.1 采用jsp
由于本文最终显示交互的是HTML页面,所以在配置时将视图解析器设置为html,在测试整合springmvc结果时,可以采用jsp页面测试,修改spring-mvc.xml文件如下:
<!-- 4. 视图解析器 对模型视图名称的解析,即在模型视图名称添加前后缀 解析jsp解析,默认使用jstl标签,classpath下的得有jstl的包 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
showUser.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
${user.user_name}
</body>
</html>
此时,将项目部署到tomcat中,启动后,浏览器端访问:http://localhost:8088/task_one/user/showUser/1
结果如下:
至此,SSM三大框架的整合完成!!!
3.5.4.2 采用HTML
SSM三大框架的整合完成后,考虑的问题是实现简单的登陆注册功能。前端部分采用bootstrap设置样式内容,显示页面为HTML页面而非jsp页面。jsp页面可以采用如${user.userName}的方式,将后台数据直接显示在前端,而HTML页面则需要Ajax异步传输获取结果。
此部分结构如图:
主要逻辑:前端访问index.html页面后,输入用户名密码,通过Ajax将输入的数据传送到后台controller,controller中通过指定接口service中的方法,在实现类serviceImpl中,操作dao对应的mapping实现具体的SQL。
部分关键代码:
index.js
$.ajax({
type: "post",
url: "/task_one/user/checkRegist",
dataType:'json',
contentType: "application/json;charset=utf-8",
data: JSON.stringify(user),
success:function(result){
alert(result.message);
location.reload();
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest.status);
console.log(XMLHttpRequest.readyState);
console.log(textStatus);
}
});
UserController.java
//验证regist
@RequestMapping(value="/checkRegist", method=RequestMethod.POST, produces="text/html;charset=UTF-8;")
@ResponseBody //只返回数据,不返回页面
public String checkRegist(HttpServletRequest request, @RequestBody String user) {
System.out.println("==========");
String[] strs=user.split("\"");
String username = strs[3];
String password = strs[7];
System.out.println("用户注册:" + username + password);
boolean registType = userService.regist(username, password);
JSONObject jsonObject = new JSONObject();
if (registType) {
jsonObject.put("message", "注册成功!");
return jsonObject.toJSONString();
}else{
jsonObject.put("message", "注册失败!");
return jsonObject.toJSONString();
}
}
UserService.java 接口中定义的方法:
public boolean regist(String username, String password);
UserServiceImpl.java 实现类中对应的实现方法:
@Override
public boolean regist(String username, String password) {
System.out.println("==========");
System.out.println("userServiceImpl, regist: " + username + password);
System.out.println("输入的账号:" + username + "输入的密码:" + password);
if (username==""||password=="") {
return false;
}else {
userDao.addUser(username, password);
return true;
}
}
UserDao.java 中定义的add方法:
public void addUser(@Param("user_name")String username,@Param("user_password") String password);
最终UserMapper.xml 中映射的实现SQL:
<insert id="addUser">
<!-- MySQL -->
insert into USER(user_name, user_password) values(#{user_name,jdbcType=VARCHAR}, #{user_password,jdbcType=VARCHAR})
<!-- Oracle -->
insert into USER(id, user_name, user_password) values(userinfo_id.nextval, #{user_name,jdbcType=VARCHAR}, #{user_password,jdbcType=VARCHAR})
</insert>
3.6 结果展示
最终的登陆页面:
用户名或密码错误提示:
注册成功提示:
登陆成功提示:
登陆成功后自动跳转到系统首页,查询所有用户信息:
此时数据库内容如下:
至此,所有内容整合构建完毕!!!
四、总结
本人菜鸟一个,水平一般,能力有限。虽然之前接触过并搭建过SSM框架,但是借助MyBatis Generator等工具,对于底层的实现过程以及映射过程不是很清晰,在自己手动写了一遍之后,深有感触,本文只是实现了最基本的框架以及最基本的注册登陆,在实际操作过程中,肯定存在很多值得优化的地方。在框架的整合与功能实现的整个过程中,总结的错误及内容点多达37个,附于错误集锦。对于spring的内容还需要更深一层次的理解与感悟,日后有时间在继续优化、重构代码。
与君共勉!
五、错误集锦
1. Eclipse 修改maven 仓储Repository位置
https://blog.csdn.net/anialy/article/details/218760992. maven镜像修改
https://blog.csdn.net/only_wan/article/details/529756983. maven 转 maven web
https://blog.csdn.net/zouxucong/article/details/560095374. ..\target\m2e-wtp\web-resources\META-INF\MANIFEST.MF (系统找不到指定的路径)解决办法
https://blog.csdn.net/liliang_11676/article/details/792723485. Maven项目pom.xml文件报错“web.xml is missing and <failOnMissingWebXml> is set to true”
http://blog.51cto.com/wuyongzhiyi/19274366. navicat 连接Oracle数据库 OCI更新
https://www.cnblogs.com/taojietx/p/6627934.html
https://blog.csdn.net/suyu_yuan/article/details/513217617. 使用maven添加、管理oracle驱动包
https://blog.csdn.net/dwfyzf/article/details/789830668. Oracle 对表的基本操作
https://blog.csdn.net/qq_33369215/article/details/527753089. get,set快捷键
右键--source--Generate Getters and Setters10. 模板各模块注释快捷键
alt+shift+J11. Oracle 实现主键自增
https://zhidao.baidu.com/question/358461319.htmlCREATE sequence userinfo_seq
START WITH 1
INCREMENT BY 1;12. oracle 时间格式
to_date('2018-09-15 16:36:00', 'yyyy-mm-dd hh24:mi:ss')13. No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
14. spring报错Error creating bean with name...
spring-mvc 扫描包
spring-mybatis 扫描service与serviceImpl
spring 添加数据库配置文件与扫描service
https://blog.csdn.net/grit_icpc/article/details/58141424
https://blog.csdn.net/zhanghe687/article/details/7121416615. 配置jdbc.properties文件
https://blog.csdn.net/u012562943/article/details/52489447
https://www.cnblogs.com/zhangchengzhangtuo/p/5614305.html16. Spring连接mysql数据库错误:Cannot load JDBC driver class '${driver}'
没有引入jdbc.properties配置文件,系统无法识别17. jdk.tools-1.8.jar
jdk.tools-1.8.jar 在jdk的中找到 不需要额外下载
https://blog.csdn.net/fruitzerg/article/details/7833951818. eclipse解决项目validate卡住的问题
https://blog.csdn.net/u011747152/article/details/79071388
https://blog.csdn.net/ksdb0468473/article/details/5224902819. Not found org.springframework.http.converter.json.MappingJacksonHttpMessageConverter
添加jar包
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jr</groupId>
<artifactId>jackson-jr-all</artifactId>
<version>2.5.0</version>
</dependency>
https://blog.csdn.net/hongweigg/article/details/4691923520. 测试环境中,添加内容:
@ContextConfiguration(locations = { "classpath:spring.xml", "classpath:spring-mybatis.xml" })
引入jdbc.properties文件21. impl 与 service放一起,扫描时一起扫描
22. 表单内容自动提交null
在controller中新加正常访问内容:
//正常访问login页面
@RequestMapping("/regist")
public String regist(){
return "regist";
}
验证的内容写在另一个方法中:
@RequestMapping(value="/checkRegist", method=RequestMethod.GET)
public String checkRegist(User user, HttpServletRequest request) throws UnsupportedEncodingException {https://blog.csdn.net/s740556472/article/details/71247285
23. ajax response乱码
在@RequestMapping里的并发配置produces={"application/json;","text/html;charset=UTF-8;"}
https://www.cnblogs.com/zique/p/6171862.html24. annotation @RequestBody is disallowed for this location
I am stupid. The proper annotation is @ResponseBody, not @RequestBody.
http://forum.spring.io/forum/spring-projects/roo/111922-annotation-requestbody-is-disallowed-for-this-location25. JQuery的ajax往后台传值情况
https://blog.csdn.net/binghuazheng/article/details/7838033826. ajax后台数据返回前端:
0.URL问题:这个URL是指向的controller中的mapping地址,为: 项目名 + controller的mapping + function的mapping
1. 设置function为 @ResponseBody ,设置成只返回数据,指向页面
2.返回的数据显示乱码:在controller中的mapping中,添加:@RequestMapping(produces="text/html;charset=UTF-8;")
3.前端的ajax中,指定数据格式为json,在后台返回时,要新建jsonobjet对象,封装数据,再传到前端ajax时可以正常解析;否则在状态正常时,也会出现解析格式错误;
27. js前端验证输入是否为空
https://zhidao.baidu.com/question/535920141.html28. ORA-00928 missing SELECT keyword
http://ruowu.iteye.com/blog/64867729. Oracle 链接数据库:ORA-00904: invalid identifier
非法标识符,说明sql写的列名可能识别不到。网上有说不能加引号,否则识别不到。
但是在此mapping 的xml文件中,每个用到的字段都需要加双引号才能正确识别。
select
"id", "user_name", "user_password"
from "userinfo"
where "id" = #{id,jdbcType=INTEGER}30. html文件引用静态资源:css,js,img
<link rel="stylesheet" href="/task/WEB-VENDER/css/signin.css" >
设置spring-mvc.xml:
<!-- 静态资源存在时候不进行映射,表示WEB-VENDER下的东西都是静态资源 -->
<mvc:resources mapping="/WEB-VENDER/**" location="/WEB-VENDER/" />
然后直接引用 /task/...路径即可。31. TooManyResultsException异常
https://blog.csdn.net/liu_005/article/details/5082254432. Mapper method 'com.dao.UserDao.addUser' has an unsupported return type: class com.model.User
addUser()方法为void类型
https://blog.csdn.net/qq_32917699/article/details/77743453
https://www.cnblogs.com/dushan/p/5175779.html33. 后台 list 转换成json格式:先构造json对象,再存入数据中。
JSONArray jsonArray = new JSONArray();
for(User user:userList) {
JSONObject jsonObject = new JSONObject();
jsonObject.put("id", user.getId());
jsonObject.put("user_name", user.getUser_name());
jsonObject.put("user_password", user.getUser_password());
jsonArray.add(jsonObject);
}34. js如何把服务器里面的json数据渲染输出到html页面
https://segmentfault.com/q/1010000012895596
循环拼接,其他框架35. 前端json字符串解析出json对象
https://www.cnblogs.com/songyunxinQQ529616136/p/6259559.html
https://www.cnblogs.com/redfire/p/7702108.html36. html 换行 <br>
37. sql排序:order by "" desc(降序)/asc(升序)
六、参考链接
https://blog.csdn.net/zhshulin/article/details/37956105#t8
https://segmentfault.com/q/1010000012895596
https://blog.csdn.net/binghuazheng/article/details/78380338
https://www.cnblogs.com/zhangchengzhangtuo/p/5614305.html