上传整合jpa项目

fanke-start/fanke-start/build.gradle

@@ -13,10 +13,7 @@ buildscript {
     }
 
 }
-bootRun {
-//开启页面热加载功能
-    addResources = true
-}
+
 apply plugin: 'java'
 apply plugin: 'idea'
 apply plugin: 'org.springframework.boot'
@@ -42,7 +39,11 @@ dependencies {
 // https://mvnrepository.com/artifact/nz.net.ultraq.thymeleaf/thymeleaf-layout-dialect
     compile group: 'nz.net.ultraq.thymeleaf', name: 'thymeleaf-layout-dialect', version: '2.3.0'
 
+// https://mvnrepository.com/artifact/mysql/mysql-connector-java
+    compile group: 'mysql', name: 'mysql-connector-java', version: '8.0.13'
 
+    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: '2.0.6.RELEASE'
+    runtime('com.h2database:h2:1.4.197')
 
     implementation('org.springframework.boot:spring-boot-starter-web')
     testImplementation('org.springframework.boot:spring-boot-starter-test')

fanke-start/fanke-start/src/main/java/com/zhang/springboot/blog/fankestart/controller/UserController.java

@@ -41,12 +41,11 @@ public String hello() {
     @GetMapping
     public ModelAndView list(Model model) {
         System.out.println("123");
-        model.addAttribute("userList", userRepository.listUser());
+        model.addAttribute("userList", userRepository.findAll());
         model.addAttribute("title", "用户管理");
         return new ModelAndView("users/list", "userModel", model);
     }
 
-
     /**
      * 根据id来查询用户
      *
@@ -56,7 +55,7 @@ public ModelAndView list(Model model) {
      */
     @GetMapping("{id}")  //默认 id为字符串String类型
     public ModelAndView finduserByid(@PathVariable("id") Long id, Model model) {
-        User user = userRepository.getUserById(id);
+        User user = userRepository.findById(id).get();
         model.addAttribute("user", user);
         model.addAttribute("title", "查看用户");
         return new ModelAndView("users/view", "userModel", model);
@@ -70,16 +69,51 @@ public ModelAndView finduserByid(@PathVariable("id") Long id, Model model) {
      */
     @GetMapping("/form")
     public ModelAndView createForm(Model model) {
-        model.addAttribute("user", new User());
+        model.addAttribute("user", new User(null, null, null));
         model.addAttribute("title", "创建用户");
         return new ModelAndView("users/form", "userModel", model);
     }
 
+    /**
+     * 修改页面
+     *
+     * @param model
+     * @return
+     */
+    @GetMapping("/modify/{id}")
+    public ModelAndView modifyusers(@PathVariable("id") Long id, Model model) {
+        User user = userRepository.findById(id).get();
+        model.addAttribute("user", user);
+        model.addAttribute("title", "修改用户");
+        return new ModelAndView("users/form", "userModel", model);
+    }
+
+
+    /**
+     * 表单提交保存数据
+     *
+     * @param user
+     * @param model
+     * @return
+     */
     @PostMapping
     public ModelAndView saveOrUpdateUser(User user, Model model) {
-        user = userRepository.saveOrUpdateUser(user);   //新建的用户，给他赋值id
+        user = userRepository.save(user);   //最初方法新建的用户，给他赋值id
         return new ModelAndView("users/form", "userModel", model);
+    }
 
+    /**
+     * 删除用户
+     *
+     * @param id
+     * @return
+     */
+    @GetMapping("/delete/{id}")
+    public ModelAndView delete(@PathVariable("id") Long id) {
+        //userRepository.deleteUser(id);
+        //Modelandview 设置重定向
+        return new ModelAndView("redirect:/users");
     }
 
+
 }

fanke-start/fanke-start/src/main/java/com/zhang/springboot/blog/fankestart/entity/User.java

@@ -1,18 +1,28 @@
 package com.zhang.springboot.blog.fankestart.entity;
 
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
 /**
  * @author created by Zhangdazhuang
  * @version v.0.1
  * @date 2018/10/23
  * @备注 用户实体
  **/
+@Entity
 public class User {
-     Long id;  //实体唯一标识
-     String name;
-     String email;
-    public User(){
+    @Id  //主键
+    @GeneratedValue(strategy = GenerationType.IDENTITY)//生成策略
+    Long id;  //实体唯一标识
+    String name;
+    String email;
 
+    protected User() {
+   //设为protected ，防止直接使用
     }
+
     public User(Long id, String name, String email) {
         this.id = id;
         this.name = name;
@@ -42,4 +52,9 @@ public String getEmail() {
     public void setEmail(String email) {
         this.email = email;
     }
+
+    @Override
+    public String toString() {
+        return  String.format("User[id=%d,name='%s',email='%s']",id,name,email);
+    }
 }

fanke-start/fanke-start/src/main/java/com/zhang/springboot/blog/fankestart/repository/UserRepository.java

@@ -1,45 +1,46 @@
 package com.zhang.springboot.blog.fankestart.repository;
 
 import com.zhang.springboot.blog.fankestart.entity.User;
+import org.springframework.data.repository.CrudRepository;
 
 import java.util.List;
 
 /**
  * @author created by Zhangdazhuang
  * @version v.0.1
  * @date 2018/10/23
- * @备注 测试
+ * @备注 继承CrudRepository，有各种实现
  **/
-public interface UserRepository {
+public interface UserRepository extends CrudRepository<User, Long> {
     /**
      * 创建或者修改用户
      *
      * @param user
      * @return
      */
-    public User saveOrUpdateUser(User user);
+   /* public User saveOrUpdateUser(User user);
 
-    /**
+    *//**
      * 删除用户
      *
      * @param id
-     */
+     *//*
     public void deleteUser(Long id);
 
-    /**
+    *//**
      * 根据id穿用户
      *
      * @param id
      * @return
-     */
+     *//*
     public User getUserById(Long id);
 
-    /**
+    *//**
      * 获取用户列表
      *
      * @return
-     */
+     *//*
     public List<User> listUser();
-
+*/
 
 }

fanke-start/fanke-start/src/main/java/com/zhang/springboot/blog/fankestart/repository/impl/UserRepositoryImpl.java

@@ -17,8 +17,8 @@
  * @备注 实现 User各种方法
  **/
 //@Repository对应数据访问层Bean ，例如：
-@Repository
-public class UserRepositoryImpl implements UserRepository {
+//@Repository
+public class UserRepositoryImpl  {
     //唯一标示id，用于计数。每次递增
     private static AtomicLong counter=new AtomicLong();
     //ConcurrentHashMap它是HashMap的一个线程安全的、支持高效并发的版本
@@ -27,7 +27,7 @@ public class UserRepositoryImpl implements UserRepository {
      */
     private final ConcurrentMap<Long, User> userMap = new ConcurrentHashMap<>();
 
-    @Override
+
     public User saveOrUpdateUser(User user) {
         Long id=user.getId();
         if(id==null) {
@@ -39,17 +39,17 @@ public User saveOrUpdateUser(User user) {
         return user;
     }
 
-    @Override
+
     public void deleteUser(Long id) {
         this.userMap.remove(id);
     }
 
-    @Override
+
     public User getUserById(Long id) {
         return userMap.get(id);
     }
 
-    @Override
+
     public List<User> listUser() {
         //new ArrayList<类型>(包装的数据)
         return new ArrayList<User>(this.userMap.values());

fanke-start/fanke-start/src/main/resources/application.properties

@@ -3,9 +3,22 @@
 ########################################################
 #spring.thymeleaf.prefix=classpath:/templates/
 #spring.thymeleaf.suffix=.html
-#spring.thymeleaf.mode=HTML5
-#spring.thymeleaf.encoding=UTF-8
+spring.thymeleaf.mode=HTML5
+spring.thymeleaf.encoding=UTF-8
 # ;charset=<encoding> is added
 # set to false for hot refresh
 spring.thymeleaf.cache=false 
+spring.h2.console.enabled=true
 
+spring.datasource.url = jdbc:mysql://localhost:3306/db_testboot?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC 
+spring.datasource.username = root
+spring.datasource.password = 123456
+spring.datasource.driverClassName = com.mysql.cj.jdbc.Driver
+spring.datasource.max-active=20
+spring.datasource.max-idle=8
+spring.datasource.min-idle=8
+spring.datasource.initial-size=10
+
+spring.jpa.show-sql = true
+#×Ô¶¯É¾³ý±í
+spring.jpa.hibernate.ddl-auto=create-drop

fanke-start/fanke-start/src/main/resources/templates/users/form.html

@@ -7,14 +7,17 @@
 </head>
 <body>
 <div th:replace="~{fragments/header ::  header}"></div>
-<h3 th:text="${userModel.title}">静态显示文本被覆盖</h3>
+<!--<h3 th:text="${userModel.title}"></h3>-->
 <!--<form action="/users" ></form> 都可以-->
-<form action="/users" th:action="@{/users}" method="post">
-    <input type="hidden" name="id">
+<!--th:object拿到user变量-->
+<form action="/users" th:action="@{/users}" method="post" th:object="${userModel.user}">
+   <!-- <input type="hidden" name="id" th:value="${userModel.user.id}">-->
+    <!--两种都可以找到id，下面采用选择表达式-->
+    <input type="hidden" name="id" th:value="*{id}">
     名称:<br>
-    <input type="text" name="name">
+    <input type="text" name="name" th:value="*{name}"><br>
     邮箱:<br>
-    <input type="text" name="email">
+    <input type="text" name="email" th:value="*{email}">
     <input type="submit" value="提交">
 </form>
 

fanke-start/fanke-start/src/main/resources/templates/users/list.html

@@ -8,15 +8,14 @@
 </head>
 <body>
 
-<!--引入头部信息-->
+<!--引入头部片段-->
 <div th:replace="fragments/header :: header"></div>
 <h3 th:text="${userModel.title}"></h3>
 <div>
     <a href="/users/form.html" th:href="@{/users/form}">创建用户</a>
 </div>
 
 
-
 <table border="1">
     <thead>
     <tr>
@@ -31,7 +30,8 @@ <h3 th:text="${userModel.title}"></h3>
     </tr>
     <tr th:each="user : ${userModel.userList}">
         <td th:text="${user.id}"></td>
-        <td th:text="${user.name}"></td>
+        <!--<td th:text="${user.name}"></td>-->
+        <td><a th:href="@{'/users/'+${user.id}}" th:text="${user.name}"></a></td>
         <td th:text="${user.email}"></td>
     </tr>
     </tbody>

fanke-start/fanke-start/src/main/resources/templates/users/view.html

@@ -6,6 +6,26 @@
     <title>Thymeleaf in action</title>
 </head>
 <body>
-  <p>21231</p>
+<p>21231</p>
+<div th:replace="~{fragments/header :: header}"></div>
+<h3 th:text="${userModel.title}">静态显示文本被覆盖</h3>
+<div>
+    <p><strong>ID:</strong><span th:text="${userModel.user.id}"></span></p>
+    <p><strong>Name:</strong><span th:text="${userModel.user.name}"></span></p>
+    <p><strong>Email:</strong><span th:text="${userModel.user.email}"></span></p>
+</div>
+
+
+
+<div>
+    <a th:href="@{'/users/delete/'+${userModel.user.id}}">删除</a>
+    <a th:href="@{'/users/modify/'+${userModel.user.id}}">修改</a>
+</div>
+
+
+
+<div th:replace="~{fragments/footer :: footer}"></div>
+
+
 </body>
 </html>