add code and README

pom.xml

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+<project xmlns="http:https://maven.apache.org/POM/4.0.0" xmlns:xsi="http:https://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http:https://maven.apache.org/POM/4.0.0 http:https://maven.apache.org/maven-v4_0_0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <groupId>com.soecode.ssm</groupId>
+ <artifactId>ssm</artifactId>
+ <packaging>war</packaging>
+ <version>0.0.1-SNAPSHOT</version>
+ <name>ssm Maven Webapp</name>
+ <url>http:https://github.com/liyifeng1994/ssm</url>
+ <dependencies>
+ <!-- 单元测试 -->
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>4.11</version>
+ </dependency>
+
+ <!-- 1.日志 -->
+ <!-- 实现slf4j接口并整合 -->
+ <dependency>
+ <groupId>ch.qos.logback</groupId>
+ <artifactId>logback-classic</artifactId>
+ <version>1.1.1</version>
+ </dependency>
+
+ <!-- 2.数据库 -->
+ <dependency>
+ <groupId>mysql</groupId>
+ <artifactId>mysql-connector-java</artifactId>
+ <version>5.1.37</version>
+ <scope>runtime</scope>
+ </dependency>
+ <dependency>
+ <groupId>c3p0</groupId>
+ <artifactId>c3p0</artifactId>
+ <version>0.9.1.2</version>
+ </dependency>
+
+ <!-- DAO: MyBatis -->
+ <dependency>
+ <groupId>org.mybatis</groupId>
+ <artifactId>mybatis</artifactId>
+ <version>3.3.0</version>
+ </dependency>
+ <dependency>
+ <groupId>org.mybatis</groupId>
+ <artifactId>mybatis-spring</artifactId>
+ <version>1.2.3</version>
+ </dependency>
+
+ <!-- 3.Servlet web -->
+ <dependency>
+ <groupId>taglibs</groupId>
+ <artifactId>standard</artifactId>
+ <version>1.1.2</version>
+ </dependency>
+ <dependency>
+ <groupId>jstl</groupId>
+ <artifactId>jstl</artifactId>
+ <version>1.2</version>
+ </dependency>
+ <dependency>
+ <groupId>com.fasterxml.jackson.core</groupId>
+ <artifactId>jackson-databind</artifactId>
+ <version>2.5.4</version>
+ </dependency>
+ <dependency>
+ <groupId>javax.servlet</groupId>
+ <artifactId>javax.servlet-api</artifactId>
+ <version>3.1.0</version>
+ </dependency>
+
+ <!-- 4.Spring -->
+ <!-- 1)Spring核心 -->
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-core</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-beans</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-context</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <!-- 2)Spring DAO层 -->
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-jdbc</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-tx</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <!-- 3)Spring web -->
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-web</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-webmvc</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+ <!-- 4)Spring test -->
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring-test</artifactId>
+ <version>4.1.7.RELEASE</version>
+ </dependency>
+
+ <!-- redis客户端:Jedis -->
+ <dependency>
+ <groupId>redis.clients</groupId>
+ <artifactId>jedis</artifactId>
+ <version>2.7.3</version>
+ </dependency>
+ <dependency>
+ <groupId>com.dyuproject.protostuff</groupId>
+ <artifactId>protostuff-core</artifactId>
+ <version>1.0.8</version>
+ </dependency>
+ <dependency>
+ <groupId>com.dyuproject.protostuff</groupId>
+ <artifactId>protostuff-runtime</artifactId>
+ <version>1.0.8</version>
+ </dependency>
+
+ <!-- Map工具类 -->
+ <dependency>
+ <groupId>commons-collections</groupId>
+ <artifactId>commons-collections</artifactId>
+ <version>3.2</version>
+ </dependency>
+ </dependencies>
+ <build>
+ <finalName>ssm</finalName>
+ </build>
+</project>

src/main/java/com/soecode/lyf/dao/AppointmentDao.java

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+package com.soecode.lyf.dao;
+
+import org.apache.ibatis.annotations.Param;
+
+import com.soecode.lyf.entity.Appointment;
+
+public interface AppointmentDao {
+
+ /**
+ * 插入预约图书记录
+ * 
+ * @param bookId
+ * @param studentId
+ * @return 插入的行数
+ */
+ int insertAppointment(@Param("bookId") long bookId, @Param("studentId") long studentId);
+
+ /**
+ * 通过主键查询预约图书记录，并且携带图书实体
+ * 
+ * @param bookId
+ * @param studentId
+ * @return
+ */
+ Appointment queryByKeyWithBook(@Param("bookId") long bookId, @Param("studentId") long studentId);
+
+}

src/main/java/com/soecode/lyf/dao/BookDao.java

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+package com.soecode.lyf.dao;
+
+import java.util.Date;
+import java.util.List;
+
+import org.apache.ibatis.annotations.Param;
+
+import com.soecode.lyf.entity.Book;
+
+public interface BookDao {
+
+ /**
+ * 通过ID查询单本图书
+ * 
+ * @param id
+ * @return
+ */
+ Book queryById(long id);
+
+ /**
+ * 查询所有图书
+ * 
+ * @param offset 查询起始位置
+ * @param limit 查询条数
+ * @return
+ */
+ List<Book> queryAll(@Param("offset") int offset, @Param("limit") int limit);
+
+ /**
+ * 减少馆藏数量
+ * 
+ * @param bookId
+ * @return 如果影响行数等于>1，表示更新的记录行数
+ */
+ int reduceNumber(long bookId);
+
+}

src/main/java/com/soecode/lyf/dto/AppointExecution.java

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+package com.soecode.lyf.dto;
+
+import com.soecode.lyf.entity.Appointment;
+import com.soecode.lyf.enums.AppointStateEnum;
+
+/**
+ * 封装预约执行后结果
+ */
+public class AppointExecution {
+
+ // 图书ID
+ private long bookId;
+
+ // 秒杀预约结果状态
+ private int state;
+
+ // 状态标识
+ private String stateInfo;
+
+ // 预约成功对象
+ private Appointment appointment;
+
+ public AppointExecution() {
+ }
+
+ // 预约失败的构造器
+ public AppointExecution(long bookId, AppointStateEnum stateEnum) {
+ this.bookId = bookId;
+ this.state = stateEnum.getState();
+ this.stateInfo = stateEnum.getStateInfo();
+ }
+
+ // 预约成功的构造器
+ public AppointExecution(long bookId, AppointStateEnum stateEnum, Appointment appointment) {
+ this.bookId = bookId;
+ this.state = stateEnum.getState();
+ this.stateInfo = stateEnum.getStateInfo();
+ this.appointment = appointment;
+ }
+
+ public long getBookId() {
+ return bookId;
+ }
+
+ public void setBookId(long bookId) {
+ this.bookId = bookId;
+ }
+
+ public int getState() {
+ return state;
+ }
+
+ public void setState(int state) {
+ this.state = state;
+ }
+
+ public String getStateInfo() {
+ return stateInfo;
+ }
+
+ public void setStateInfo(String stateInfo) {
+ this.stateInfo = stateInfo;
+ }
+
+ public Appointment getAppointment() {
+ return appointment;
+ }
+
+ public void setAppointment(Appointment appointment) {
+ this.appointment = appointment;
+ }
+
+ @Override
+ public String toString() {
+ return "AppointExecution [bookId=" + bookId + ", state=" + state + ", stateInfo=" + stateInfo + ", appointment="
+ + appointment + "]";
+ }
+
+}

src/main/java/com/soecode/lyf/dto/Result.java

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+package com.soecode.lyf.dto;
+
+/**
+ * 封装json对象，所有返回结果都使用它
+ */
+public class Result<T> {
+
+ private boolean success;// 是否成功标志
+
+ private T data;// 成功时返回的数据
+
+ private String error;// 错误信息
+
+ public Result() {
+ }
+
+ // 成功时的构造器
+ public Result(boolean success, T data) {
+ this.success = success;
+ this.data = data;
+ }
+
+ // 错误时的构造器
+ public Result(boolean success, String error) {
+ this.success = success;
+ this.error = error;
+ }
+
+ public boolean isSuccess() {
+ return success;
+ }
+
+ public void setSuccess(boolean success) {
+ this.success = success;
+ }
+
+ public T getData() {
+ return data;
+ }
+
+ public void setData(T data) {
+ this.data = data;
+ }
+
+ public String getError() {
+ return error;
+ }
+
+ public void setError(String error) {
+ this.error = error;
+ }
+
+ @Override
+ public String toString() {
+ return "JsonResult [success=" + success + ", data=" + data + ", error=" + error + "]";
+ }
+
+}