SSM整合 完美支持RESTful(Jsp和客户端<android ios...>)
一 RESTful简介
RESTful是一种网络应用程序的设计风格和开发方式 它结构清晰 符合标准 易于理解 扩展方便
REST 即Representational State Transfer的缩写 这个词组可以翻译成 表现层状态转化
通过URI定位资源(图片 文字 视频等等) 然后根据四个HTTP动词 对服务端资源进行操作 实现表现层状态转化
HTTP协议里面 四个表示操作方式的动词 GET POST PUT DELETE 分别对应四种基本操作 GET用来获取 POST用来新建 PUT用来更新 DELETE用来删除
二 三层架构简介
三层架构是为了符合高内聚 低耦合思想 把各个功能模块划分为表示层 业务层 持久层
开发者分工更明确 将精力更专注于应用核心业务逻辑的分析 设计和开发 加快项目的进度 提高了开发效率 有利于项目的更新和维护工作
表现层: 和客户端进行数据交互 表现层一般会采用MVC设计模型
业务层: 处理具体的业务逻辑
持久层: 操作数据库
三 MVC模型简介
Model View Controller 模型视图控制器
M: 数据模型(JavaBean) 用来进行数据封装
V: JSP HTML 用来展示数据给用户
C: 控制器 用来接收用户请求
四 SSM初体验
S: Spring
S: SpringMVC
M: MyBatis
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.hy.ssm</groupId>
<artifactId>ssm-demo</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging> <!-- 定义依赖版本号 -->
<properties>
<junit.version>4.12</junit.version>
<slf4j-log4j12.version>1.7.25</slf4j-log4j12.version>
<javax.servlet-api.version>4.0.1</javax.servlet-api.version>
<jsp-api.version>2.0</jsp-api.version>
<jstl.version>1.2</jstl.version>
<spring.version>5.0.5.RELEASE</spring.version>
<jackson-databind.version>2.9.5</jackson-databind.version>
<commons-fileupload.version>1.3.3</commons-fileupload.version>
<mysql-connector-java.version>8.0.11</mysql-connector-java.version>
<druid.version>1.1.10</druid.version>
<mybatis.version>3.4.6</mybatis.version>
<mybatis-spring.version>1.3.2</mybatis-spring.version>
<pagehelper.version>5.1.4</pagehelper.version>
</properties> <!-- 管理jar版本号 -->
<dependencyManagement>
<dependencies>
<!-- junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<!-- slf4j -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j-log4j12.version}</version>
</dependency>
<!-- servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${javax.servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<!-- jsp -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp-api.version}</version>
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jackson(spring mvc need) -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson-databind.version}</version>
</dependency>
<!-- fileupload(spring mvc need) -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector-java.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis-spring.version}</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
</dependencies>
</dependencyManagement> <dependencies>
<!-- junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
<!-- slf4j -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</dependency>
<!-- servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- jsp -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<!-- jackson(spring mvc need) -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<!-- fileupload(spring mvc need) -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
<!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
</dependency>
</dependencies> <build>
<!-- 允许mybatis的mapper.java和mapper.xml在同一目录 -->
<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> <plugins>
<!-- 编译 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<!-- tomcat7 -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8081</port>
<path>/</path>
<uriEncoding>UTF-8</uriEncoding>
</configuration>
</plugin>
</plugins>
</build>
</project>
sql
-- 用户表
CREATE TABLE user (
id INT PRIMARY KEY AUTO_INCREMENT COMMENT '用户id',
username VARCHAR(32) COMMENT '用户名',
money DOUBLE COMMENT '用户余额'
); INSERT INTO user VALUES (1, '曹操', 8000);
INSERT INTO user VALUES (2, '孙权', 8000);
INSERT INTO user VALUES (3, '刘备', 8000);
INSERT INTO user VALUES (4, '诸葛亮', 5000);
INSERT INTO user VALUES (5, '司马懿', 5000);
INSERT INTO user VALUES (6, '张飞', 0);
INSERT INTO user VALUES (7, '关羽', 0);
INSERT INTO user VALUES (8, '马超', 1000);
INSERT INTO user VALUES (9, '黄忠', 1000);
INSERT INTO user VALUES (10, '赵云', 3000);
2. 新建webapp文件夹及子文件夹和web.xml
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1"> <!-- 指定Spring配置文件的位置 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:application*.xml</param-value>
</context-param>
<!-- 让Spring容器随项目的启动而创建 随项目的关闭而销毁 -->
<!-- 容器创建时 会把所有单例对象都创建出来 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <!-- Jsp文件表单支持RESTful -->
<filter>
<filter-name>multipartFilter</filter-name>
<filter-class>org.springframework.web.multipart.support.MultipartFilter</filter-class>
<init-param>
<param-name>multipartResolverBeanName</param-name>
<param-value>multipartResolver</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>multipartFilter</filter-name>
<servlet-name>spring-mvc</servlet-name>
</filter-mapping> <!-- Jsp普通表单支持RESTful -->
<filter>
<filter-name>hiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>hiddenHttpMethodFilter</filter-name>
<servlet-name>spring-mvc</servlet-name>
</filter-mapping> <!-- 处理PUT提交参数(只对普通表单生效) 客户端(android ios...)支持RESTful必须配置 -->
<filter>
<filter-name>httpPutFormContentFilter</filter-name>
<filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>httpPutFormContentFilter</filter-name>
<!-- 拦截所有 -->
<url-pattern>/*</url-pattern>
</filter-mapping> <!-- 处理POST提交乱码 -->
<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>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<!-- 拦截所有 -->
<url-pattern>/*</url-pattern>
</filter-mapping> <!-- 前端控制器 -->
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring-mvc.xml</param-value>
</init-param>
<!-- 配置SpringMVC启动时机
1. 第一次被访问时启动 值为负数
2. 随着容器启动而启动 值为0或正数 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<!-- 拦截所有(不包含jsp 包含js png css...) -->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
3. 创建jsp webapp/WEB-INF/jsp/index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body> <h3>事务</h3> ${user6.toString()}<br/>
${user7.toString()}<br/>
<a href="${pageContext.request.contextPath}/test/tm">事务模拟操作</a> <h3>分页</h3> <a href="${pageContext.request.contextPath}/test/selectUserList">全部</a><br/>
<a href="${pageContext.request.contextPath}/test/selectUserList/1/2">第一页 每页2条</a><br/>
<a href="${pageContext.request.contextPath}/test/selectUserList/2/2">第二页 每页2条</a> <h3>RESTful</h3> <p>POST 普通表单</p>
<form action="${pageContext.request.contextPath}/test/insert" method="post">
姓名 <input type="text" name="name"/><br/>
<input type="submit" value="提交"/>
</form> <p>POST 文件表单</p>
<form action="${pageContext.request.contextPath}/test/insertX" enctype="multipart/form-data" method="post">
姓名 <input type="text" name="name"/><br/>
文件 <input type="file" name="file"/><br/>
<input type="submit" value="提交"/>
</form> <p>DELETE 普通表单</p>
<form action="${pageContext.request.contextPath}/test/delete/1" method="post">
<input type="hidden" name="_method" value="DELETE"/>
姓名 <input type="text" name="name"/><br/>
<input type="submit" value="提交"/>
</form> <p>PUT 普通表单</p>
<form action="${pageContext.request.contextPath}/test/update/1" method="post">
<input type="hidden" name="_method" value="PUT"/>
姓名 <input type="text" name="name"/><br/>
<input type="submit" value="提交"/>
</form> <p>PUT 文件表单</p>
<form action="${pageContext.request.contextPath}/test/updateX/1" enctype="multipart/form-data" method="post">
<input type="hidden" name="_method" value="PUT"/>
姓名 <input type="text" name="name"/><br/>
文件 <input type="file" name="file"/><br/>
<input type="submit" value="提交"/>
</form> <p>GET 普通表单</p>
<form action="${pageContext.request.contextPath}/test/select/1" method="post">
<input type="hidden" name="_method" value="GET"/>
姓名 <input type="text" name="name"/><br/>
<input type="submit" value="提交"/>
</form> </body>
</html>
4. 配置日志输出 resources/log4j.properties
### 输出到控制台 ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n ### 输出到文件 ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=//Users/HUANGYI/Downloads/x-log.txt
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n ### 日志级别: fatal > error > warn > info > debug > trace ###
### 输出到哪里: stdout|file ###
#log4j.rootLogger=info, stdout ### 输出所有日志 ###
log4j.rootLogger=all, stdout ### 不输出日志 ###
#log4j.rootLogger=off, stdout
5. 配置数据源 resources/druid.properties
url=jdbc:mysql://localhost:3306/demo_hy?characterEncoding=utf8&useSSL=false
driverClassName=com.mysql.cj.jdbc.Driver
username=root
password=root
maxActive=10
minIdle=5
6. 创建spring配置文件 resources/application.xml 其中管理了mybatis 无需额外创建mybatis全局配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 引入配置文件 -->
<context:property-placeholder location="classpath:*.properties" /> <!-- 扫描Service -->
<context:component-scan base-package="com.hy.ssm.service" /> <!-- 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
<property name="url" value="${url}" />
<property name="driverClassName" value="${driverClassName}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="maxActive" value="${maxActive}" />
<property name="minIdle" value="${minIdle}" />
</bean> <!-- Mybatis会话工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource" />
<!-- 别名 -->
<property name="typeAliasesPackage" value="com.hy.ssm.model" />
<!-- 插件 -->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<value>
helperDialect=mysql
</value>
</property>
</bean>
</array>
</property>
</bean> <!-- Mybatis动态代理 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.hy.ssm.mapper" />
</bean> <!-- 事务核心管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean> <!-- 事务通知 -->
<tx:advice id="advice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 以方法为单位 指定方法应用什么事务属性
isolation: 隔离级别
propagation: 传播行为
read-only: 是否只读 -->
<tx:method name="insert*" isolation="DEFAULT" propagation="REQUIRED" read-only="false" />
<tx:method name="delete*" isolation="DEFAULT" propagation="REQUIRED" read-only="false" />
<tx:method name="update*" isolation="DEFAULT" propagation="REQUIRED" read-only="false" />
<tx:method name="select*" isolation="DEFAULT" propagation="REQUIRED" read-only="true" />
</tx:attributes>
</tx:advice> <!-- 事务织入 -->
<aop:config>
<!-- expression(表达式): 切点表达式 -->
<!-- * com.hy.ssm.service..*.*(..)
* = 任意返回值
com.hy.ssm.service. = com.hy.ssm.service包和所有子包
.*.* = .任意类.任意方法名
(..) = 任意参数 -->
<aop:pointcut id="pointcut" expression="execution(* com.hy.ssm.service..*.*(..))" />
<aop:advisor pointcut-ref="pointcut" advice-ref="advice" />
</aop:config>
</beans>
7. 创建springmvc文件上传配置文件 resources/application-upload.xml 务必单独配置 由spring加载 而不是springmvc
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd"> <!-- 单独配置是为了 解决Jsp文件表单异常 让Spring(父容器)初始化multipartResolver -->
<!-- 自定义PostAndPutCommonsMultipartResolver是为了 解决客户端(android ios...) PUT提交文件表单异常 --> <!-- 文件上传实现类 id名称必须固定 -->
<bean id="multipartResolver" class="com.hy.ssm.resolver.PostAndPutCommonsMultipartResolver">
<!-- 默认编码 -->
<property name="defaultEncoding" value="UTF-8" />
<!-- 文件上传大小(单位B) 5M = 5 * 1024 * 1024 -->
<property name="maxUploadSize" value="5242880" />
</bean>
</beans>
8. 创建springmvc配置文件 resources/spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"> <!-- 扫描Controller -->
<context:component-scan base-package="com.hy.ssm.controller" /> <!-- 注解驱动 -->
<mvc:annotation-driven /> <!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 逻辑视图前缀 -->
<property name="prefix" value="/WEB-INF/jsp" />
<!-- 逻辑视图后缀 -->
<property name="suffix" value=".jsp" />
</bean> <!-- 加载静态资源 -->
<mvc:default-servlet-handler />
</beans>
9. 自定义文件上传实现类 com.hy.ssm.resolver.PostAndPutCommonsMultipartResolver 解决客户端(android ios...) PUT提交文件表单异常
public class PostAndPutCommonsMultipartResolver extends CommonsMultipartResolver {
@Override
public boolean isMultipart(HttpServletRequest request) {
if ("POST".equalsIgnoreCase(request.getMethod()) || "PUT".equalsIgnoreCase(request.getMethod())) {
return FileUploadBase.isMultipartContent(new ServletRequestContext(request));
}
return false;
}
}
10. 创建实体类 com.hy.ssm.model.User com.hy.ssm.model.PageWrapper
public class User implements Serializable {
private Integer id;
private String username;
private Double money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", money=" + money +
'}';
}
}
public class PageWrapper implements Serializable {
private Long total;
private List list;
public PageWrapper() {}
public PageWrapper(Long total, List list) {
this.total = total;
this.list = list;
}
public Long getTotal() {
return total;
}
public void setTotal(Long total) {
this.total = total;
}
public List getList() {
return list;
}
public void setList(List list) {
this.list = list;
}
}
11. 创建mapper接口 com.hy.ssm.mapper.UserMapper
public interface UserMapper {
User selectUserById(Integer id);
List<User> selectUserList();
Integer updateUserMoney(Map map);
}
12. 创建mapper映射文件 com.hy.ssm.mapper.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.hy.ssm.mapper.UserMapper">
<select id="selectUserById" parameterType="Integer" resultType="User">
SELECT *
FROM user
WHERE id = #{value}
</select> <select id="selectUserList" resultType="User">
SELECT *
FROM user
</select> <update id="updateUserMoney" parameterType="HashMap">
UPDATE user
SET money = money + #{money}
WHERE id = #{id}
</update>
</mapper>
13. 创建service接口 com.hy.ssm.service.IUserService
public interface IUserService {
User selectUserById(Integer id);
List<User> selectUserList();
PageWrapper selectUserList(Integer pageNum, Integer pageSize);
Boolean updateUserMoney(Map map1, Map map2);
}
14. 创建service实现类 com.hy.ssm.service.imp.UserService
@Service
public class UserService implements IUserService { @Autowired
private UserMapper userMapper; @Override
public User selectUserById(Integer id) {
return userMapper.selectUserById(id);
} @Override
public List<User> selectUserList() {
return userMapper.selectUserList();
} @Override
public PageWrapper selectUserList(Integer pageNum, Integer pageSize) {
PageHelper.startPage(pageNum, pageSize);
List<User> userList = userMapper.selectUserList();
PageInfo<User> pageInfo = new PageInfo<>(userList);
return new PageWrapper(pageInfo.getTotal(), userList);
} @Override
public Boolean updateUserMoney(Map map1, Map map2) {
Integer integer1 = userMapper.updateUserMoney(map1);
int i = 3 / 0; //模拟异常
Integer integer2 = userMapper.updateUserMoney(map2);
return 0 != integer1 && 0 != integer2;
}
}
15. 创建控制器 com.hy.ssm.controller.TestController
@Controller
@RequestMapping("/test")
public class TestController { @Autowired
private IUserService userService; @RequestMapping("/index")
public String index(Model model) {
User user6 = userService.selectUserById(6);
User user7 = userService.selectUserById(7);
model.addAttribute("user6", user6);
model.addAttribute("user7", user7);
return "/index";
} @RequestMapping("/tm")
public String tm() {
Map<String, Object> map1 = new HashMap<>();
map1.put("id", 6);
map1.put("money", -1000.0);
Map<String, Object> map2 = new HashMap<>();
map2.put("id", 7);
map2.put("money", +1000.0);
userService.updateUserMoney(map1, map2);
return "redirect:index";
} @RequestMapping("/selectUserList")
@ResponseBody
public List<User> selectUserList() {
return userService.selectUserList();
} @GetMapping("/selectUserList/{page}/{size}")
@ResponseBody
public PageWrapper selectUserList(@PathVariable Integer page, @PathVariable Integer size) {
return userService.selectUserList(page, size);
} /** RESTful 只进行演示 没有做数据持久化 同时支持Jsp 客户端(android ios...) **/ @PostMapping("/insert")
@ResponseBody
public Map insert(String name) {
Map<String, Object> map = new HashMap<>();
map.put("name", name);
return map;
} @PostMapping("/insertX")
@ResponseBody
public Map insertX(HttpServletRequest request, String name, MultipartFile file) throws Exception {
Map<String, Object> map = new HashMap<>();
map.put("name", name);
map.put("path", saveFile(request, file));
return map;
} @DeleteMapping("/delete/{id}")
@ResponseBody
public Map delete(@PathVariable Integer id, String name) {
Map<String, Object> map = new HashMap<>();
map.put("id", id);
map.put("name", name);
return map;
} @PutMapping("/update/{id}")
@ResponseBody
public Map update(@PathVariable Integer id, String name) {
Map<String, Object> map = new HashMap<>();
map.put("id", id);
map.put("name", name);
return map;
} @PutMapping("/updateX/{id}")
@ResponseBody
public Map updateX(@PathVariable Integer id, HttpServletRequest request, String name, MultipartFile file) throws Exception {
Map<String, Object> map = new HashMap<>();
map.put("id", id);
map.put("name", name);
map.put("path", saveFile(request, file));
return map;
} @GetMapping("/select/{id}")
@ResponseBody
public Map select(@PathVariable Integer id, String name) {
Map<String, Object> map = new HashMap<>();
map.put("id", id);
map.put("name", name);
return map;
} private String saveFile(HttpServletRequest request, MultipartFile file) throws Exception {
if (null != file && !file.isEmpty()) {
String fileName = UUID.randomUUID().toString().replace("-", ""); //文件名
String originalFilename = file.getOriginalFilename();
String substring = originalFilename.substring(originalFilename.lastIndexOf("."));
String path = request.getServletContext().getRealPath("/upload") + "/" + fileName + substring;
file.transferTo(new File(path));
return path;
}
return "";
}
}
启动项目 访问 http://localhost:8081/test/index
android客户端核心代码
public interface Api {
@POST("/test/insert")
@FormUrlEncoded
Call<ResponseBody> insert(@Field("name") String name);
@POST("/test/insertX")
@Multipart
Call<ResponseBody> insertX(@Part MultipartBody.Part name, @Part MultipartBody.Part file);
@DELETE("/test/delete/{id}")
Call<ResponseBody> delete(@Path("id") Integer id, @Query("name") String name);
@PUT("/test/update/{id}")
@FormUrlEncoded
Call<ResponseBody> update(@Path("id") Integer id, @Field("name") String name);
@PUT("/test/updateX/{id}")
@Multipart
Call<ResponseBody> updateX(@Path("id") Integer id, @Part MultipartBody.Part name, @Part MultipartBody.Part file);
@GET("/test/select/{id}")
Call<ResponseBody> select(@Path("id") Integer id, @Query("name") String name);
}
private void insert() {
Call<ResponseBody> call = mApi.insert("祎哥哥");
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {}
});
}
private void insertX() {
MultipartBody.Part name = MultipartBody.Part.createFormData("name", "祎哥哥");
RequestBody body = RequestBody.create(MediaType.parse("application/octet-stream"), card("text.txt"));
MultipartBody.Part file = MultipartBody.Part.createFormData("file", "text.txt", body);
Call<ResponseBody> call = mApi.insertX(name, file);
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {}
});
}
private void delete() {
Call<ResponseBody> call = mApi.delete(3, "黄祎");
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {}
});
}
private void update() {
Call<ResponseBody> call = mApi.update(3, "黄祎");
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {}
});
}
private void updateX() {
MultipartBody.Part name = MultipartBody.Part.createFormData("name", "黄祎");
RequestBody body = RequestBody.create(MediaType.parse("application/octet-stream"), card("text.txt"));
MultipartBody.Part file = MultipartBody.Part.createFormData("file", "text.txt", body);
Call<ResponseBody> call = mApi.updateX(3, name, file);
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {}
});
}
private void select() {
Call<ResponseBody> call = mApi.select(3, "黄祎");
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {}
});
}
五 通过注解管理事务
初体验项目中是使用申明式事务管理 还可以使用注解式事务管理 2种事务管理方式都很常见 任选其中一种即可
1. 修改resources/application.xml 将下面配置拷贝进去 替换掉 事务通知 事务织入
<!-- 事务注解 -->
<tx:annotation-driven />
2. 在com.hy.ssm.service.imp.UserService上添加注解
@Transactional(isolation = Isolation.DEFAULT, propagation = Propagation.REQUIRED, readOnly = false)
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