package com.de.debook.controller; import com.de.debook.bo.ResponseBean; import com.de.debook.constant.WebConstant; import com.de.debook.utils.FileUploadUtils; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; import java.io.File; import java.io.IOException; import java.util.Map; @RestController public class UploadFileController { private static final int FILE_SIZE_MAX = 20 * 1024 * 1024; // 上传限制大小 /** * @param multipartFile * @description: 通用文件上传处理器 * @return: java.util.Map<java.lang.String , java.lang.Object> */ @RequestMapping(value = "/uploadFile", produces = "application/json;charset=UTF-8") public Map<String, Object> fileUpload(@RequestParam("file") MultipartFile multipartFile) { ResponseBean responseBean = new ResponseBean(); if (multipartFile != null) { String realName = multipartFile.getOriginalFilename(); // 原始文件名 String suffix = FileUploadUtils.fileSuffix(realName); // 文件名后缀 String tmpFileName = FileUploadUtils.createTmpFileName(suffix); // 生成保证不重复的临时文件名 if (multipartFile.getSize() > FILE_SIZE_MAX) { responseBean.putError("上传失败：文件大小不得超过20MB"); return responseBean.getResponseMap(); } File tmpFile = new File(WebConstant.FILE_STORAGE_ROOT,tmpFileName); try { multipartFile.transferTo(tmpFile); // 写入本地 responseBean.putData("data", "/images/" + tmpFileName); } catch (IOException e) { responseBean.putError("上传失败：" + e.getMessage()); e.printStackTrace(); } } return responseBean.getResponseMap(); } }这段代码中怎末实现的图片上传

package com.de.debook.interceptor; import com.de.debook.entity.User; import com.de.debook.constant.WebConstant; import org.springframework.stereotype.Component; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; @Component public class AuthorityInterceptor implements HandlerInterceptor { // 权限拦截器 @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { HttpSession session = request.getSession(); User user = (User) session.getAttribute(WebConstant.SESSION_KEY_USER); // 用户未登录状态返回登录页面 if (user == null) { response.sendRedirect("/user/login.html"); return false; } return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }

这段代码是一个权限拦截器，用于拦截未登录用户的访问。在 preHandle 方法中，首先获取 HttpSession 中的 User 对象，如果 User 为 null，说明用户未登录，此时将请求重定向到登录页面，并返回 false，拦截请求。...

package com.de.debook.constant; public class WebConstant { public static String CONTEXT_PATH; // 项目实际部署路径 public static String WEB_FILE_ROOT; // 项目存储路径 public static String FILE_STORAGE_ROOT; public static final String SESSION_KEY_USER = "user"; }

这是一个Java类文件，其中定义了几个静态变量，用于存储Web应用程序中的常量。具体来说： - CONTEXT_PATH 存储了当前Web应用程序在服务器上的实际部署路径，可以用来访问Web应用程序的资源文件或者其他路径相关的...

spring.datasource.url=jdbc:mysql://localhost:3306/debook?characterEncoding=utf-8 spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.tomcat.initial-size=10 spring.datasource.tomcat.max-active=50 spring.datasource.tomcat.max-idle=30 spring.datasource.tomcat.min-idle=10 spring.freemarker.template-loader-path=classpath:/templates/ spring.freemarker.charset=utf-8 spring.freemarker.cache=false spring.freemarker.expose-request-attributes=true spring.freemarker.expose-session-attributes=true spring.freemarker.expose-spring-macro-helpers=true spring.freemarker.suffix=.ftl spring.jackson.date-format=yyyy-MM-dd spring.jackson.time-zone=GMT+8 mybatis.type-aliases-package=com.de.debook.entity mybatis.mapper-locations=classpath:mapper/*.xml debug=true logging.level.com.de.debook.mapper=debug

这是一个 Spring Boot 应用程序的配置文件，其中包含了一些关于数据库连接、Freemarker 模板引擎的...- 日志配置：指定了 com.de.debook.mapper 包下的日志级别为 debug 级别。其中，debug=true 表示开启调试模式。

package com.de.debook.init; import org.springframework.boot.CommandLineRunner; import org.springframework.stereotype.Component; @Component public class RunLoadPage implements CommandLineRunner { @Override public void run(String... args) throws Exception { try { Runtime.getRuntime().exec("cmd /c start http://localhost:8080/user/login.html"); } catch (Exception ex) { ex.printStackTrace(); } } }

这段代码是一个 Spring Boot 应用程序中的组件，它实现了 CommandLineRunner 接口，并覆盖了它的 run 方法。在应用程序启动时，Spring Boot 会自动调用 CommandLineRunner 的 run 方法。 ...具体实现是通过 Runtime....

@RequestMapping("/debook/add.html") public String addDebookHtml(Model model, HttpSession session) { List<Category> categoryList = categoryService.selectAll(); model.addAttribute("categoryList", categoryList); return "/admin/debook_add"; } @ResponseBody @RequestMapping("/debook/add") public Map<String, Object> addDebook(@RequestBody Debook debook, HttpSession session) { User user = (User) session.getAttribute(WebConstant.SESSION_KEY_USER); debook.setUserId(user.getId()); debook.setUsername(user.getUsername()); debook.setDebookTime(new Date()); debookService.insertSelective(debook); return new ResponseBean().getResponseMap(); }

第二个方法 @ResponseBody @RequestMapping("/debook/add") 用于处理 POST 请求，将提交的 Debook 对象插入到数据库中，并返回一个成功的响应。其中，@ResponseBody 注解表示该方法的返回值将会被直接写入 HTTP 响应...

package com.de.debook.bo; import java.util.HashMap; import java.util.Map; public class ResponseBean { private Map<String, Object> responseMap = new HashMap<>(); private static final Integer success = 0; private static final Integer error = -1; private static final String message = "ok"; // 默认应答成功 public ResponseBean() { responseMap.put("status", success); responseMap.put("message", message); } // 出错时消息 public void putError(String message) { responseMap.put("status", error); responseMap.put("message", message); } // 数据 public void putData(String key, Object value) { responseMap.put(key, value); } // 分页数据 public void putPageData(Object data, Object count){ responseMap.put("code", success); responseMap.put("data", data); responseMap.put("count", count); } public Map<String, Object> getResponseMap() { return responseMap; } }

这是一个 ResponseBean 类，用于封装返回给前端的数据。其中包含了成功和失败的状态码、消息以及数据的相关方法。代码中使用了一个 HashMap 来存储返回的数据，可以通过 putData 方法来添加数据，也可以通过 ...

package com.de.debook.config; import com.de.debook.interceptor.AuthorityInterceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class ConfigRegistCanter implements WebMvcConfigurer { //注册拦截器 //addPathPatterns 用来设置拦截路径 //excludePathPatterns 用来设置白名单，也就是不需要触发这个拦截器的路径。 //addPathPatterns("/") 表示拦截所有的请求 @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(new AuthorityInterceptor()) .excludePathPatterns("/user/login.html") .excludePathPatterns("/user/login") .excludePathPatterns("/user/login.out") .excludePathPatterns("/user/register.html") .excludePathPatterns("/user/register") .excludePathPatterns("/admin/register.html") .excludePathPatterns("/index.html") .excludePathPatterns("/js/") .excludePathPatterns("/css/") .excludePathPatterns("/images/") .excludePathPatterns("/layui/") .excludePathPatterns("/wangEditor/"); } //这个方法是用来配置静态资源的，比如html,js,css等 @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { } }

具体来说，代码中的 AuthorityInterceptor 是自定义的拦截器类，用来实现用户权限的控制。在 addInterceptors 方法中，通过 registry.addInterceptor() 方法添加拦截器，并使用 excludePathPatterns 方法...

<?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.de.debook.mapper.CategoryMapper"> <resultMap id="BaseResultMap" type="com.de.debook.entity.Category"> <id column="id" jdbcType="INTEGER" property="id"/> <result column="name" jdbcType="VARCHAR" property="name"/> </resultMap> <resultMap id="StatisticsResultMap" type="com.de.debook.entity.Statistics"> <result column="name" jdbcType="VARCHAR" property="name"/> <result column="value" jdbcType="VARCHAR" property="value"/> </resultMap> <sql id="Base_Column_List"> id, name </sql> <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap"> select <include refid="Base_Column_List"/> from category where id = #{id,jdbcType=INTEGER} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer"> delete from category where id = #{id,jdbcType=INTEGER} </delete> <insert id="insert" parameterType="com.de.debook.entity.Category"> insert into category (id, name) values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}) </insert> <insert id="insertSelective" parameterType="com.de.debook.entity.Category"> insert into category <trim prefix="(" suffix=")" suffixOverrides=","> <if test="id != null"> id, </if> <if test="name != null"> name, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides=","> <if test="id != null"> #{id,jdbcType=INTEGER}, </if> <if test="name != null"> #{name,jdbcType=VARCHAR}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.de.debook.entity.Category"> update category <set> <if test="name != null"> name = #{name,jdbcType=VARCHAR}, </if> </set> where id = #{id,jdbcType=INTEGER} </update> <update id="updateByPrimaryKey" parameterType="com.de.debook.entity.Category"> update category set name = #{name,jdbcType=VARCHAR} where id = #{id,jdbcType=INTEGER} </update> <select id="selectAll" resultMap="BaseResultMap"> select <include refid="Base_Column_List"/> from category order by id asc </select> <select id="selectStatistics" resultMap="StatisticsResultMap"> SELECT t1.name as name, COUNT(*) as value FROM category t1, debook t2 WHERE t1.id = t2.category_id GROUP BY t1.id order by t1.id asc </select> </mapper>

这是一个 MyBatis 的 Mapper 文件，用于映射实体类 Category 到数据库表 category。其中包括了一些 SQL 语句，如 selectByPrimaryKey、deleteByPrimaryKey、insert、updateByPrimaryKeySelective 等，用于对数据表...

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <classPathEntry location="D:\mysql-connector-java-5.1.46.jar" /> <context id="context1"> <commentGenerator> </commentGenerator> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/debook?characterEncoding=utf-8" userId="root" password="root" /> <javaTypeResolver> </javaTypeResolver> <javaModelGenerator targetPackage="com.de.debook.entity" targetProject="src/main/java" /> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources" /> <javaClientGenerator targetPackage="com.de.debook.mapper" targetProject="src/main/java" type="XMLMAPPER" /> </context> </generatorConfiguration>

这是一个MyBatis Generator的配置文件，用于生成Java代码和XML文件，对应于数据库中的表。其中，classPathEntry指定了需要使用的jar包，commentGenerator用于生成注释，jdbcConnection指定了数据库连接信息，...

@ResponseBody @RequestMapping("/debook/data") public Map<String, Object> debookData(@RequestParam("page") int page, @RequestParam("limit") int limit, @RequestParam(value = "title", required = false) String title, @RequestParam(value = "categoryId", required = false) Integer categoryId) { List<Debook> debookList = debookService.selectPaging(page , limit, title, categoryId); int totalCount = debookService.tatolCount(title, categoryId); ResponseBean responseBean = new ResponseBean(); responseBean.putPageData(debookList, totalCount); return responseBean.getResponseMap(); }

- @RequestMapping("/debook/data")：表示该方法处理来自客户端的请求 URL 是 "/debook/data" 的请求。 - @RequestParam：用于从请求 URL 中获取参数值。其中，"page" 和 "limit" 是必需的参数，"title" 和 ...

// 编辑 @RequestMapping("/edit/{id}.html") public String editHtml(@PathVariable("id") int id, Model model, HttpSession session) { Debook debook = debookService.selectByPrimaryKey(id); List<Category> categoryList = categoryService.selectAll(); model.addAttribute("categoryList", categoryList); model.addAttribute("debook", debook); return "/user/debook_edit"; }

在方法中，从数据库中获取id对应的Debook对象和所有的Category对象列表，并将它们都添加到Model对象中。最后，返回一个指定路径为"/user/debook_edit"的字符串，表示要渲染该路径下的HTML模板。

package com.de.debook.utils; import java.io.*; import java.text.SimpleDateFormat; import java.util.Date; import java.util.UUID; public class FileUploadUtils { /** * @param * @description: 生成一个唯一的ID * @return: java.lang.String */ public static String createUUID() { String s = UUID.randomUUID().toString(); String s2 = s.substring(24).replace("-", ""); return s2.toUpperCase(); } /** * @description: 得到一个保证不重复的临时文件名 * @return: java.lang.String */ public static String createTmpFileName(String suffix) { SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd-HHmmss"); String datestr = sdf.format(new Date()); String name = datestr + "-" + createUUID() + "." + suffix; return name; } /** * @param fileName 原始文件名 * @description: 得到文件的后缀名 * @return: java.lang.String */ public static String fileSuffix(String fileName) { int p = fileName.lastIndexOf('.'); if (p >= 0) { return fileName.substring(p + 1).toLowerCase(); } return ""; } public static void deleteDir(String dirPath) { File file = new File(dirPath); if (file.isFile()) { file.delete(); } else { File[] files = file.listFiles(); if (files == null) { file.delete(); } else { for (int i = 0; i < files.length; i++) { deleteDir(files[i].getAbsolutePath()); } file.delete(); } } } public static byte[] getFileByteArray(File file) { long fileSize = file.length(); if (fileSize > Integer.MAX_VALUE) { System.out.println("file too big..."); return null; } byte[] buffer = null; try (FileInputStream fi = new FileInputStream(file)) { buffer = new byte[(int) fileSize]; int offset = 0; int numRead = 0; while (offset < buffer.length && (numRead = fi.read(buffer, offset, buffer.length - offset)) >= 0) { offset += numRead; } // 确保所有数据均被读取 if (offset != buffer.length) { throw new IOException("Could not completely read file" + file.getName()); } } catch (Exception e) { e.printStackTrace(); } return buffer; } public static void writeBytesToFile(byte[] bs, String file) throws IOException { OutputStream out = new FileOutputStream(file); InputStream is = new ByteArrayInputStream(bs); byte[] buff = new byte[1024]; int len = 0; while ((len = is.read(buff)) != -1) { out.write(buff, 0, len); } is.close(); out.close(); } }

这是一个文件上传工具类，包含以下方法： 1. createUUID()：用于生成唯一的UUID。 2. createTmpFileName(String suffix)：用于生成一个不重复的临时文件名，包括时间戳和UUID。 3. fileSuffix(String fileName)：...

<?xml version="1.0" encoding="UTF-8"?> <modelVersion>4.0.0</modelVersion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.5.5</version> <relativePath/> <groupId>com.de</groupId> <artifactId>debook</artifactId> <version>0.0.1-SNAPSHOT</version> <name>debook</name> <description>Demo project for Spring Boot</description> <java.version>1.8</java.version> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.7</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.7</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.7</version> </dependency> </dependencies> <build> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.7</version> <configuration> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> </build>

这是一个基于Spring Boot框架的Maven项目，它使用了Freemarker模板引擎、Spring JDBC、MyBatis、Druid连接池和MySQL数据库。它还包含了一些测试依赖项和MyBatis Generator插件用于生成Mapper接口和XML文件。...

@RequestMapping("/debook.html") public String debookHtml(Model model) { List<Category> categoryList = categoryService.selectAll(); model.addAttribute("categoryList", categoryList); return "/admin/debook"; }

这段代码是一个Spring MVC框架中的控制器方法，用于处理一个名为“debook.html”的HTTP请求，并返回一个视图名为“/admin/debook”的HTML页面。在该方法中，首先通过调用categoryService的selectAll()方法获取一个...

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package com.de.debook.constant; public class WebConstant { public static String CONTEXT_PATH; // 项目实际部署路径 public static String WEB_FILE_ROOT; // 项目存储路径 public static String FILE_STORAGE_ROOT; public static final String SESSION_KEY_USER = "user"; }

@RequestMapping("/debook.html") public String debookHtml(Model model) { List<Category> categoryList = categoryService.selectAll(); model.addAttribute("categoryList", categoryList); return "/admin/debook"; }

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