增加必要的依赖，修改bean包的数据类型以及添加Getter，Setter方法

后端的都放着里面/demo/pom.xml

@@ -28,7 +28,7 @@
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
-			<version>1.3.2</version>
+			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.mybatis.spring.boot</groupId>
@@ -39,6 +39,11 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-jpa</artifactId>
 		</dependency>
+		<dependency>
+		    <groupId>org.projectlombok</groupId>
+		    <artifactId>lombok</artifactId>
+		    <version>1.16.10</version>
+		</dependency>
 		<dependency>
 			<groupId>net.sf.json-lib</groupId>
 			<artifactId>json-lib</artifactId>

后端的都放着里面/demo/src/main/java/com/example/demo/bean/book.java

@@ -1,54 +1,22 @@
 package com.example.demo.bean;
 
+import lombok.Getter;
+import lombok.Setter;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+@Getter
+@Setter
+@Entity
 public class book {
     @GeneratedValue(strategy=GenerationType.AUTO)
-    @ID
     private long book_id;
-    private string book_name;
+    private String book_name;
-    private string author;
+    private String author;
-    private string book_sort;
+    private String book_sort;
     private int book_num;
 
-    public long getBook_id() {
-        return book_id;
-    }
-
-    public void setBook_id(long book_id) {
-        this.book_id = book_id;
-    }
-
-    public string getBook_name() {
-        return book_name;
-    }
-
-    public void setBook_name(string book_name) {
-        this.book_name = book_name;
-    }
-
-    public string getAuthor() {
-        return author;
-    }
-
-    public void setAuthor(string author) {
-        this.author = author;
-    }
-
-    public string getBook_sort() {
-        return book_sort;
-    }
-
-    public void setBook_sort(string book_sort) {
-        this.book_sort = book_sort;
-    }
-
-    public int getBook_num() {
-        return book_num;
-    }
-
-    public void setBook_num(int book_num) {
-        this.book_num = book_num;
-    }
-
     public book(){};
 
 }

后端的都放着里面/demo/src/main/java/com/example/demo/bean/borrowrecord.java

@@ -1,66 +1,22 @@
 package com.example.demo.bean;
 
 
-import org.springframework.boot.autoconfigure.domain.EntityScan;
+import lombok.Getter;
-
+import lombok.Setter;
-@EntityScan
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+@Getter
+@Setter
+@Entity
 public class borrowrecord {
     @GeneratedValue(strategy=GenerationType.AUTO)
-    @ID
     private long s_id;
     private long book_id;
-    private string s_name;
+    private String s_name;
-
+    private String book_name;
-    public long getS_id() {
+    private String  borrowtime;
-        return s_id;
+    private String senttime;
-    }
-
-    public void setS_id(long s_id) {
-        this.s_id = s_id;
-    }
-
-    public long getBook_id() {
-        return book_id;
-    }
-
-    public void setBook_id(long book_id) {
-        this.book_id = book_id;
-    }
-
-    public string getS_name() {
-        return s_name;
-    }
-
-    public void setS_name(string s_name) {
-        this.s_name = s_name;
-    }
-
-    public string getBook_name() {
-        return book_name;
-    }
-
-    public void setBook_name(string book_name) {
-        this.book_name = book_name;
-    }
-
-    public string getBorrowtime() {
-        return borrowtime;
-    }
-
-    public void setBorrowtime(string borrowtime) {
-        this.borrowtime = borrowtime;
-    }
-
-    public string getSenttime() {
-        return senttime;
-    }
-
-    public void setSenttime(string senttime) {
-        this.senttime = senttime;
-    }
-
-    private string book_name;
-    private string  borrowtime;
-    private string senttime;
     public borrowrecord(){};
 }

后端的都放着里面/demo/src/main/java/com/example/demo/bean/student.java

@@ -1,38 +1,19 @@
 package com.example.demo.bean;
 
-import org.springframework.boot.autoconfigure.domain.EntityScan;
+import lombok.Getter;
-@EntityScan
+import lombok.Setter;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+@Getter
+@Setter
+@Entity
 public class student {
     @GeneratedValue(strategy=GenerationType.AUTO)
-    @ID
     private long s_id;
     private String s_name;
     private String s_password;
-
-    public long getS_id() {
-        return s_id;
-    }
-
-    public void setS_id(long s_id) {
-        this.s_id = s_id;
-    }
-
-    public String getS_name() {
-        return s_name;
-    }
-
-    public void setS_name(string s_name) {
-        this.s_name = s_name;
-    }
-
-    public string getS_password() {
-        return s_password;
-    }
-
-    public void setS_password(string s_password) {
-        this.s_password = s_password;
-    }
-
     public student() {};
 }