使用SSM和layui做了一个汽车租赁后台管理系统，功能还没有完善，先发出来再慢慢完善更新
包结构：
项目后期又用Maven整合了一下，jar包太多，把pom贴出来好了 pom.xml
<properties> <aspectjweaver.version>1.9.4</aspectjweaver.version> <classmate.version>1.3.4</classmate.version> <commons-fileupload.version>1.3.1</commons-fileupload.version> <commons-lang3.version>3.9</commons-lang3.version> <commons-logging.version>1.2</commons-logging.version> <druid.version>1.0.28</druid.version> <fastjson.version>1.2.62</fastjson.version> <hibernate-validator.version>5.1.1.Final</hibernate-validator.version> <hutool-all.version>4.6.10</hutool-all.version> <jackson-annotations.version>2.9.9</jackson-annotations.version> <jackson-core.version>2.9.9</jackson-core.version> <jackson-databind.version>2.9.9</jackson-databind.version> <jsqlparser.version>1.3</jsqlparser.version> <jstl.version>1.2</jstl.version> <log4j.version>1.2.17</log4j.version> <mybatis.version>3.5.0</mybatis.version> <mybatis-spring.version>1.3.3</mybatis-spring.version> <mysql-connector-java.version>5.1.47</mysql-connector-java.version> <pagehelper.version>5.1.8</pagehelper.version> <spring.version>5.2.0.RELEASE</spring.version> <standard.version>1.1.2</standard.version> <javax.servlet-api.version>3.1.0</javax.servlet-api.version> <jsp-api.version>2.2</jsp-api.version> </properties> <dependencies> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>${aspectjweaver.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml/classmate --> <dependency> <groupId>com.fasterxml</groupId> <artifactId>classmate</artifactId> <version>${classmate.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>${commons-fileupload.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>${commons-lang3.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>${commons-logging.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>${hibernate-validator.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/cn.hutool/hutool-all --> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>${hutool-all.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jackson-annotations.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson-core.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson-databind.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.github.jsqlparser/jsqlparser --> <dependency> <groupId>com.github.jsqlparser</groupId> <artifactId>jsqlparser</artifactId> <version>${jsqlparser.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql-connector-java.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>${pagehelper.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-context-support --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-oxm --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/taglibs/standard --> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>${standard.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>${javax.servlet-api.version}</version> <scope>provided</scope> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>${jsp-api.version}</version> <scope>provided</scope> </dependency> </dependencies>抽取出了使用较多的增删改查方法，封装了一套base公共类 其中，BaseForm和BaseQuery都负责接收前端ajax请求传过来的参数，不同的是，前端的添加、修改操作，用Form接收，查询操作用Query接收。BaseVO作为mybatis的返回类型。所有表的Form,Query,VO,都继承自他们，方便面向父类编程
细节如下：
public class BaseForm { }查询操作涉及到分页查询，由于使用的是layui框架，所以把layui中分页的两个参数封装了一下
public class BaseQuery { /** * 页码 */ private Integer page; /** * 每页数据条数 */ private Integer limit; public Integer getPage() { return page; } public void setPage(Integer page) { this.page = page; } public Integer getLimit() { return limit; } public void setLimit(Integer limit) { this.limit = limit; } public class BaseVO { }BaseMapper
public interface BaseMapper<F,V> { /** * 添加 * @param form * @return */ int insert(F form); /** * 根据id删除 * @param id * @return */ int delete(@Param("id") Integer id); /** * 根据id查询单个 * @param id * @return */ V selectOne(@Param("id") Integer id); /** * 查询全部 * @param query * @return */ List<V> selectList(BaseQuery query); /** * 更新 * @param form * @return */ int update(F form); }IBaseService
public interface IBaseService<F,V> { Result add(F form); Result delete(Integer id); Result queryOne(Integer id); Result queryList(BaseQuery query); Result queryPage(BaseQuery query); Result modify(F form); }BaseServiceImpl
public class BaseServiceImpl<F, V> implements IBaseService<F, V> { BaseMapper<F, V> baseMapper; public BaseServiceImpl(BaseMapper<F, V> baseMapper) { this.baseMapper = baseMapper; } @Override public Result add(F form) { int row = baseMapper.insert(form); if(row>0) { return new Result(); } return new Result(CodeMsg.SYS_ADD_ERROR); } @Override public Result delete(Integer id) { // TODO Auto-generated method stub return null; } @Override public Result queryOne(Integer id) { // TODO Auto-generated method stub return null; } @Override public Result queryList(BaseQuery query) { List<V> list = baseMapper.selectList(query); if(null == list) { return new Result(CodeMsg.SYS_QUERY_ERROR); } return new Result(list); } @Override public Result queryPage(BaseQuery query) { Page<Object> page = PageHelper.startPage(query.getPage(), query.getLimit()); baseMapper.selectList(query); PageInfo pageInfo = new PageInfo(); pageInfo.setCount(page.getTotal()); pageInfo.setLimit(page.getPageSize()); pageInfo.setPage(page.getPageNum()); pageInfo.setData(page.getResult()); return new Result(pageInfo); } @Override public Result modify(F form) { int row = baseMapper.update(form); if(row > 0){ return new Result(); } return new Result(CodeMsg.SYS_UPDATE_ERROR); } }上面的类就是我封装的最主要的一部分公共类，还有一些其他的，贴在下面
CodeMsg枚举类，前端请求处理完成之后，和数据一起返回给前端，方便前端提示
public enum CodeMsg { SUCCESS(200,"OK"), ERROR(2002001,"下雨了，程序员正在路上"), SYS_QUERY_ERROR(4001001,"查询失败"), SYS_ADD_ERROR(4002002,"添加失败"), SYS_DELETE_ERROR(4002003,"删除失败"), SYS_UPDATE_ERROR(4002004,"修改失败"), SYS_USER_VERIF_CODE_ERROR(4002001,"验证码错误,请重新输入"), SYS_USER_LOGIN_NAME_EMPTY_ERROR(4002002,"用户名不能为空"), SYS_USER_LOGIN_PASSWORD_EMPTY_ERROR(4002003,"用户密码不能为空"), SYS_USER_LOGIN_ERROR(4002004,"用户密码不正确"), SYS_USER_ADD_ERROR(4002005,"添加用户失败"), SYS_USER_DELETE_ERROR(4002006,"删除用户失败"), SYS_USER_RESET_PASSWORD_ERROR(4002007,"重置密码失败"), BUSI_RENT_IDCARD_ERROR(4002008,"用户身份证不存在"), /* * 车辆管理 */ BUSI_CAR_NUM_EXIST_ERROR(4003001,"车牌号已存在"), BUSI_CAR_IMG_SAVE_ERROR(4003002,"汽车图片保存失败"), BUSI_RENT_CARNUM_ERROR(4003003,"车牌号错误"), BUSI_CAR_RENTED_ERROR(4003004,"车辆出租状态异常"), BUSI_CAR_RENT_ERROR(4003005,"修改出租状态失败"), /** * 租车 */ BUSI_CAR_RENT_TIME_ERROR(4004001,"租车、还车时间异常"), BUSI_RENT_RENTNO_ERROR(4004002,"出租单号异常"), BUSI_RENT_FLAG_RETURNED_ERROR(4004003,"该订单状态为已归还"), /** * 检查 */ BUSI_INSERT_CHECK_ERROR(4005001,"生成检查记录失败"), //菜单模块 SYS_MENU_PARENTID_ERROR(4007001,"父菜单不存在"), //角色模块 SYS_ROLE_NOT_EXIST_ERROR(4008001,"角色不存在"); public Integer code; public String msg; public Integer getCode() { return code; } public void setCode(Integer code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } private CodeMsg(Integer code, String msg) { this.code = code; this.msg = msg; } }Constant常量类，封装了一些常用的字符、数字
public class Constant { /** * 业务正常响应码 */ public static final String CODE = "200"; /** * 参数校验错误编码 */ public static final Integer PARAM_CHECK_FAILD_CODE = 4001000; /** * 业务正常消息 */ public static final String MESSAGE = "SUCCESS"; /** * 作用域中当前用户key */ public static final String CURRENT_USER = "user"; /** * 存储在 ServletContexty 作用域中 key web URL根路径 */ public static final String WEB_URL = "cxt"; /** * 存储在Session中验证码的key */ public static final String VERIFI_CODE = "verifiCode"; /** * 默认密码 */ public static final String DEFAULT_PASSWORD = "123456"; /** * 超级管理员 */ public static final Integer SYS_USER_TYPE_ADMIN = 1; /** * 系统用户 */ public static final Integer SYS_USER_TYPE_NOMAL = 2; /** * 时间格式 */ public static final String Y_M_D_H_M_S = "yyyy-MM-dd HH:mm:ss"; /** * 时间格式:yyyyMMddHHmmssSS */ public static final String YMDHMSSS = "yyyyMMddHHmmssSS"; /** * 文件存储的目录 */ public static final String FILE_FOLDER = "resources/carImg"; /** * 未出租 */ public static final Integer CAR_NOT_RENT = 1; /** * 车辆已出租 */ public static final Integer CAR_RENTED = 2; /** * 车辆未归还 */ public static final Integer CAR_NOT_RETURN = 1; /** * 车辆已归还 */ public static final Integer CAR_RETURNED = 2; /** * 出租单号前缀 */ public static final String CAR_RENT_PRE = "RENT"; /** * 检查单号前缀 */ public static final String CAR_CHECK_PRE = "CHECK"; }PageInfo类，如果需要分页查询，就把这个类作为数据，封装到Result中，返回给前端
public class PageInfo { private Integer page;//页码 private Integer limit;//每页数据条数 private long count;// 总条数 private List<Object> data;// 具体的数据 public PageInfo() {} public PageInfo( Integer count, List<Object> list) { this.count = count; this.data = list; } public PageInfo(Integer page, Integer limit, long count, List<Object> list) { super(); this.page = page; this.limit = limit; this.count = count; this.data = list; } public Integer getPage() { return page; } public void setPage(Integer page) { this.page = page; } public Integer getLimit() { return limit; } public void setLimit(Integer limit) { this.limit = limit; } public long getCount() { return count; } public void setCount(long count) { this.count = count; } public List<Object> getData() { return data; } public void setData(List<Object> data) { this.data = data; } }Result类，这个类是最终以json格式返回给前端的，里面封装了前端需要的code(状态码) msg(提示信息) data(数据)
public class Result { Integer code; String msg; Object data; public Integer getCode() { return code; } public void setCode(Integer code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } /** * 操作成功，没有返回数据 */ public Result() { this.code = CodeMsg.SUCCESS.code; this.msg = CodeMsg.SUCCESS.msg; } /** * 操作失败 * @param codeMsg */ public Result(CodeMsg codeMsg) { this.msg = codeMsg.getMsg(); this.code = codeMsg.getCode(); } /** * 操作成功，有数据返回 * @param data */ public Result(Object data) { this.data = data; this.code = CodeMsg.SUCCESS.code; this.msg = CodeMsg.SUCCESS.msg; } public Result(String msg,Integer code) { this.msg = msg; this.code = code; } }PageController类，用于跳转页面，我的jsp是放在WEB-INF下的，需要controller帮助跳转
@Controller @RequestMapping("/page") public class PageController { /** * 用户列表 * @return */ @RequestMapping("userList.do") public String userList() { return "sys/user/list.jsp"; } @RequestMapping("carList.do") public String carList() { return "busi/car/list.jsp"; } @RequestMapping("custList.do") public String custList() { return "busi/customer/custList.jsp"; } @RequestMapping("rentList.do") public String rentList() { return "busi/rent/rentList.jsp"; } @RequestMapping("checkList.do") public String checkList() { return "busi/check/checkList.jsp"; } @RequestMapping("menuList.do") public String menuList() { return "sys/menu/menuList.jsp"; } }VerifiCodeController类，验证码生成类，我用的hutool的工具类，login页面加载时就会请求到这个类
@Controller @RequestMapping("/verifi") public class VerifiCodeController { @RequestMapping("/code.do") public void code(HttpServletResponse resp) { //创建验证码 LineCaptcha captcha = CaptchaUtil.createLineCaptcha(200, 100, 4, 1); String code = captcha.getCode(); WebUtil.setCurrentVerifiCode(code); try { captcha.write(resp.getOutputStream()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }BusiException自定义异常类，用于处理业务逻辑中产生的异常
public class BusiException extends RuntimeException{ private static final long serialVersionUID = -4331357754088686184L; /** * 自定义的异常编码 */ private Integer code; /** * 自定义的异常信息 */ private String msg; public BusiException(Integer code, String msg) { this.code = code; this.msg = msg; } /** * @Title:BusiException * @Description: 使用声明的异常信息 * @param codeMsg */ public BusiException(CodeMsg codeMsg) { this.code = codeMsg.code; this.msg = codeMsg.msg; } public Integer getCode() { return code; } public void setCode(Integer code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } }GlobalExceptionHandler 全局异常处理类，程序产生的所有一场都会经过这个类的处理，然后返回相应的消息给前端页面
@ControllerAdvice public class GlobalExceptionHandler { @ExceptionHandler(value = Exception.class) @ResponseBody public Result busiExceptionHandler(HttpServletRequest req,Exception exception) { if (exception instanceof BusiException) { System.out.println("全局异常处理......"); BusiException busiException = (BusiException) exception; System.out.println(busiException.getMessage()); return new Result(busiException.getMsg(),busiException.getCode()); } exception.printStackTrace(); return new Result(CodeMsg.ERROR); } }ApplicationListener 监听器，在程序启动时，加载我的url路径，放到context作用域中，前端用el表达式获取，作为前端页面静态资源的前缀
@WebListener public class ApplicationListener implements ServletContextListener { @Override public void contextDestroyed(ServletContextEvent sce) { } @Override public void contextInitialized(ServletContextEvent sce) { //获取 context ServletContext context = sce.getServletContext(); context.setAttribute(Constant.WEB_URL, PropertiesUtil.getProperty("WEB_URL", "web")); } }PropertiesUtil 工具类，用于读取properties配置文件
public class PropertiesUtil { private PropertiesUtil() {} public static String getProperty(String key,String properties) { InputStream in = PropertiesUtil.class.getClassLoader().getResourceAsStream(properties+".properties"); Properties prop = new Properties(); try { prop.load(in); } catch (IOException e) { e.printStackTrace(); } return prop.getProperty(key); } }WebUtil 工具类 封装了一些web相关的常用方法
public class WebUtil { private WebUtil() {} /** * 获取当前HttpServletRequest */ public static HttpServletRequest getRequest() { ServletRequestAttributes req = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes(); return req.getRequest(); } /** * 获取当前HttpSession */ public static HttpSession getSession() { return getRequest().getSession(); } /** * 获取当前ServletContext */ public static ServletContext getServletContext() { return ContextLoader.getCurrentWebApplicationContext().getServletContext(); } /** * 获取当前产生的验证码 */ public static String getCurrentVerifiCode() { Object obj = getSession().getAttribute(Constant.VERIFI_CODE); return obj != null?obj.toString():null; } /** * 将验证码放入session */ public static void setCurrentVerifiCode(String verifiCode) { getSession().setAttribute(Constant.VERIFI_CODE,verifiCode); } /** * 将登陆用户放入Session */ public static <T> void setCurrentUser(T t) { getSession().setAttribute(Constant.CURRENT_USER, t); } /** * 获取当前登陆用户 */ @SuppressWarnings("unchecked") public static <T> T getCurrentUser() { Object obj = getSession().getAttribute(Constant.CURRENT_USER); return obj != null?(T)obj:null; }ValidatorUtil 数据校验工具类，用于执行新增、修改操作时，判断传入的数据是否合法
public class ValidatorUtil { private static Validator validator; static { validator = Validation.buildDefaultValidatorFactory().getValidator(); } public static void validator(BaseForm baseForm) { Set<ConstraintViolation<BaseForm>> validate = validator.validate(baseForm); for (ConstraintViolation<BaseForm> constraintViolation : validate) { String message = constraintViolation.getMessage(); throw new BusiException(Constant.PARAM_CHECK_FAILD_CODE,message); } } }公共类和工具类贴完啦
表比较多，就只贴出一张car表的controller，service代码吧，其它表和它基本类似，都是按照相同的套路，
@RestController @RequestMapping("/car") public class BusiCarController { @Autowired IBusiCarService carService; @RequestMapping("/list.do") @ResponseBody public Object list(BusiCarQuery query) { Result rs = carService.queryPage(query); return rs; } @RequestMapping("/addCar.do") @ResponseBody public Object addCar(MultipartFile carImg,BusiCarForm form) { //数据校验 ValidatorUtil.validator(form); Result rs = carService.add(carImg, form); return rs; } @RequestMapping("/deleteCar.do") @ResponseBody public Object deleteCar(@RequestParam("carNum") List<String> carNums) { Result rs = carService.batchDeleteCar(carNums); return rs; } @RequestMapping("/updateCar.do") @ResponseBody public Object updateCar(MultipartFile carImg,BusiCarForm form) { //数据校验 ValidatorUtil.validator(form); Result rs = carService.update(carImg, form); return rs; } @RequestMapping("/rentCar.do") @ResponseBody public Object rentCar(RentForm form) { ValidatorUtil.validator(form); Result rs = carService.rent(form); return rs; } } public interface IBusiCarService extends IBaseService<BusiCarForm, BusiCarVO> { public Result batchDeleteCar(List<String> carNums); Result add(MultipartFile carImg, BusiCarForm form); Result update(MultipartFile carImg, BusiCarForm form); public Result rent( RentForm form); } @Service public class BusiCarServiceImpl extends BaseServiceImpl<BusiCarForm,BusiCarVO> implements IBusiCarService { @Autowired BusiCarMapper<BusiCarForm, BusiCarVO> carMapper; @Autowired BusiCustomerMapper<BusiCustomerForm, BusiCustomerVO> customerMapper; @Autowired private BusRentsMapper<RentForm, BusiCarVO> busRentsMapper; public BusiCarServiceImpl(BusiCarMapper<BusiCarForm, BusiCarVO> carMapper) { super(carMapper); } @Override public Result batchDeleteCar(List<String> carNums) { int rows = carMapper.batchDelete(carNums); if(rows>0) { return new Result(); } return new Result(CodeMsg.SYS_DELETE_ERROR); } @Override @Transactional public Result add(MultipartFile carImg, BusiCarForm form) { form.setIsRent(Constant.CAR_NOT_RENT); /** * 保存车辆数据 * 1.校验车牌号是否已经被使用 */ BusiCarQuery query = new BusiCarQuery(); query.setCarNum(form.getCarNum()); //校验车牌号 List<BusiCarVO> vos = carMapper.selectList(query); if(!vos.isEmpty()) { return new Result(CodeMsg.BUSI_CAR_NUM_EXIST_ERROR); } //汽车图片存储的目录路径 String realPath = WebUtil.getServletContext().getRealPath(Constant.FILE_FOLDER); //上传的文件的名称 String originalFilename = carImg.getOriginalFilename(); //获取文件后缀 String suff = this.fileSuffix(originalFilename); // 产生文件名称 用于保存, String fileName = form.getCarNum()+suff; form.setImg(Constant.FILE_FOLDER+"/"+fileName); //更新车辆信息 carMapper.insert(form); try { carImg.transferTo(new File(realPath+File.separator+fileName)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); throw new BusiException(CodeMsg.BUSI_CAR_IMG_SAVE_ERROR); } return new Result(); } private String fileSuffix(String fileName) { return fileName.substring(fileName.lastIndexOf(".")); } @Override @Transactional public Result update(MultipartFile carImg, BusiCarForm form) { //汽车图片存储的目录路径 String realPath = WebUtil.getServletContext().getRealPath(Constant.FILE_FOLDER); //上传的文件的名称 String originalFilename = carImg.getOriginalFilename(); //获取文件后缀 String suff = this.fileSuffix(originalFilename); // 产生文件名称 用于保存, String fileName = form.getCarNum()+suff; form.setImg(Constant.FILE_FOLDER+"/"+fileName); //更新车辆信息 carMapper.update(form); //删除车辆之前的图片 //String img = vos.get(0).getImg(); try { //保存图片 carImg.transferTo(new File(realPath+File.separator+fileName)); //删除之前的图片 //realPath = WebUtil.getServletContext().getRealPath(img); //File file = new File(realPath); //删除之前的文件 //if(file.exists()) { //file.delete(); //} } catch (Exception e) { e.printStackTrace(); throw new BusiException(CodeMsg.BUSI_CAR_IMG_SAVE_ERROR); } return new Result(); } @Transactional @Override public Result rent(RentForm form) { //校验身份证号 BusiCustomerQuery query = new BusiCustomerQuery(); query.setIdCard(form.getIdCard()); List<BusiCustomerVO> vos = customerMapper.selectList(query); if(vos.isEmpty()) { return new Result(CodeMsg.BUSI_RENT_IDCARD_ERROR); } //查询车辆状态 BusiCarQuery carQuery = new BusiCarQuery(); carQuery.setCarNum(form.getCarNum()); List<BusiCarVO> cars = carMapper.selectList(carQuery); if(cars.isEmpty()) { return new Result(CodeMsg.BUSI_RENT_CARNUM_ERROR); } //校验是否出租 if(cars.get(0).getIsRent() == Constant.CAR_RENTED) { return new Result(CodeMsg.BUSI_CAR_RENTED_ERROR); } //修改车辆出租状态 int m = carMapper.updateRent(form.getCarNum(), Constant.CAR_RENTED,cars.get(0).getVersion()); if(m == 0) { throw new BusiException(CodeMsg.BUSI_CAR_RENT_ERROR); } //创建出租单 //创建出租单号 String format = DateUtil.format(new Date(), Constant.YMDHMSSS); String rentNo = Constant.CAR_RENT_PRE+format+form.getCarNum(); //设置出租单号 form.setRentNo(rentNo); SysUserVO user = WebUtil.getCurrentUser(); form.setUserId(user.getId()); form.setCreateTime(DateUtil.format(new Date(), Constant.Y_M_D_H_M_S)); //计算价格 /** * 按小时计算 没有满24小时 算 24小时 */ //校验时间 比较还车时间 大于 租车时间 long beginTimes = DateUtil.parse(form.getBeginTime(),Constant.Y_M_D_H_M_S).getTime(); long returnTimes = DateUtil.parse(form.getReturnTime(),Constant.Y_M_D_H_M_S).getTime(); if(beginTimes > returnTimes) { throw new BusiException(CodeMsg.BUSI_CAR_RENT_TIME_ERROR); } //计算价格 double times = returnTimes - beginTimes; double time = Math.ceil(times/1000.0/60.0/60.0) ; if(time < 24) { form.setPrice(cars.get(0).getRentPrice()); }else { // 总小时 * 每小时的租金 int money = (int) (time*(cars.get(0).getRentPrice() / 24)); form.setPrice(money); } busRentsMapper.insert(form); return new Result(); }只用父类BaseMapper中的方法肯定是不够的，所以BusiCarMapper中又写了新的方法
public interface BusiCarMapper<F,V> extends BaseMapper<F,V> { public int batchDelete(@Param("carNums") List<String> carNums); public int updateRent(@Param("carNum")String carNum,@Param("rent")Integer rent,@Param("version")Integer version); }spring和mybatis的配置文件就不贴啦，配置文件都一样，没啥花样。有问题欢迎评论留言
