Spring Boot 緩存管理與優(yōu)化實例教程

更新時間：2026年04月28日 10:33:34 作者：星辰徐哥

本文介紹了SpringBoot緩存管理與優(yōu)化的核心概念與使用方法,文中通過示例介紹了如何使用SpringCache進行集成,并給出了一些常見的緩存策略,感興趣的朋友跟隨小編一起看看吧

Spring Boot 緩存管理與優(yōu)化

35.1 學習目標與重點提示

學習目標：掌握Spring Boot緩存管理與優(yōu)化的核心概念與使用方法，包括緩存的定義與特點、Spring Boot與緩存的集成、緩存策略的配置與優(yōu)化、Spring Boot的實際應用場景，學會在實際開發(fā)中處理緩存管理與優(yōu)化問題。
重點：緩存的定義與特點、Spring Boot與緩存的集成、緩存策略的配置與優(yōu)化、Spring Boot的實際應用場景。

35.2 緩存管理與優(yōu)化概述

緩存管理與優(yōu)化是Java開發(fā)中的重要組件，用于提高系統(tǒng)的性能和響應速度。

35.2.1 緩存的定義

定義：緩存是一種將數(shù)據(jù)暫時存儲在高速存儲介質(zhì)中的技術(shù)，用于提高數(shù)據(jù)訪問速度。
作用：

提高數(shù)據(jù)訪問速度。
減少數(shù)據(jù)庫壓力。
提高系統(tǒng)的響應速度。

常見的緩存：

內(nèi)存緩存。
磁盤緩存。
分布式緩存。

? 結(jié)論：緩存是一種將數(shù)據(jù)暫時存儲在高速存儲介質(zhì)中的技術(shù)，作用是提高數(shù)據(jù)訪問速度、減少數(shù)據(jù)庫壓力、提高系統(tǒng)的響應速度。

35.2.2 緩存管理的定義

定義：緩存管理是指對緩存進行管理和優(yōu)化，確保緩存的有效性和高性能。
作用：

提高緩存的有效性。
提高系統(tǒng)的性能。
確保緩存的可靠性。

常見的緩存管理：

緩存的添加。
緩存的刪除。
緩存的更新。
緩存的淘汰。

? 結(jié)論：緩存管理是指對緩存進行管理和優(yōu)化，作用是提高緩存的有效性、提高系統(tǒng)的性能、確保緩存的可靠性。

35.3 Spring Boot與緩存的集成

Spring Boot與緩存的集成是Java開發(fā)中的重要內(nèi)容。

35.3.1 集成Spring Cache的步驟

定義：集成Spring Cache的步驟是指使用Spring Boot與Spring Cache集成的方法。
步驟：

創(chuàng)建Spring Boot項目。
添加所需的依賴。
配置緩存。
創(chuàng)建實體類。
創(chuàng)建業(yè)務層。
創(chuàng)建控制器類。
測試應用。

示例：
pom.xml文件中的依賴：

<dependencies>
    <!-- Web依賴 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- 緩存依賴 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-cache</artifactId>
    </dependency>
    <!-- 數(shù)據(jù)驗證依賴 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
    </dependency>
    <!-- 測試依賴 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

application.properties文件中的配置：

# 服務器端口
server.port=8080
# 緩存配置
spring.cache.type=simple

實體類：

import javax.validation.constraints.*;
public class Product {
    private Long id;
    @NotBlank(message = "產(chǎn)品ID不能為空")
    @Size(min = 3, max = 10, message = "產(chǎn)品ID長度必須在3到10個字符之間")
    private String productId;
    @NotBlank(message = "產(chǎn)品名稱不能為空")
    @Size(min = 2, max = 50, message = "產(chǎn)品名稱長度必須在2到50個字符之間")
    private String productName;
    @Min(value = 0, message = "價格必須大于等于0")
    @Max(value = 10000, message = "價格必須小于等于10000")
    private double price;
    @Min(value = 0, message = "庫存必須大于等于0")
    private int stock;
    public Product() {
    }
    public Product(Long id, String productId, String productName, double price, int stock) {
        this.id = id;
        this.productId = productId;
        this.productName = productName;
        this.price = price;
        this.stock = stock;
    }
    // Getter和Setter方法
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getProductId() {
        return productId;
    }
    public void setProductId(String productId) {
        this.productId = productId;
    }
    public String getProductName() {
        return productName;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public int getStock() {
        return stock;
    }
    public void setStock(int stock) {
        this.stock = stock;
    }
    @Override
    public String toString() {
        return "Product{" +
                "id=" + id +
                ", productId='" + productId + '\'' +
                ", productName='" + productName + '\'' +
                ", price=" + price +
                ", stock=" + stock +
                '}';
    }
}

Repository接口：

import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
@Repository
public class ProductRepository {
    private List<Product> products = new ArrayList<>();
    public ProductRepository() {
        products.add(new Product(1L, "P001", "手機", 1000.0, 100));
        products.add(new Product(2L, "P002", "電腦", 5000.0, 50));
        products.add(new Product(3L, "P003", "電視", 3000.0, 80));
        products.add(new Product(4L, "P004", "手表", 500.0, 200));
        products.add(new Product(5L, "P005", "耳機", 300.0, 150));
    }
    public List<Product> getAllProducts() {
        return products;
    }
    public Product getProductById(Long id) {
        return products.stream().filter(product -> product.getId().equals(id)).findFirst().orElse(null);
    }
    public void addProduct(Product product) {
        product.setId((long) (products.size() + 1));
        products.add(product);
    }
    public void updateProduct(Product product) {
        Product existingProduct = getProductById(product.getId());
        if (existingProduct != null) {
            existingProduct.setProductId(product.getProductId());
            existingProduct.setProductName(product.getProductName());
            existingProduct.setPrice(product.getPrice());
            existingProduct.setStock(product.getStock());
        }
    }
    public void deleteProduct(Long id) {
        products.removeIf(product -> product.getId().equals(id));
    }
}

Service類：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class ProductService {
    @Autowired
    private ProductRepository productRepository;
    @Cacheable("products")
    public List<Product> getAllProducts() {
        System.out.println("從數(shù)據(jù)庫獲取所有產(chǎn)品");
        return productRepository.getAllProducts();
    }
    @Cacheable(value = "product", key = "#id")
    public Product getProductById(Long id) {
        System.out.println("從數(shù)據(jù)庫獲取產(chǎn)品：" + id);
        return productRepository.getProductById(id);
    }
    @CachePut(value = "product", key = "#product.id")
    public Product addProduct(Product product) {
        System.out.println("添加產(chǎn)品到數(shù)據(jù)庫");
        productRepository.addProduct(product);
        return product;
    }
    @CachePut(value = "product", key = "#product.id")
    public Product updateProduct(Product product) {
        System.out.println("更新產(chǎn)品到數(shù)據(jù)庫：" + product.getId());
        productRepository.updateProduct(product);
        return product;
    }
    @CacheEvict(value = {"product", "products"}, key = "#id")
    public void deleteProduct(Long id) {
        System.out.println("刪除產(chǎn)品：" + id);
        productRepository.deleteProduct(id);
    }
}

控制器類：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
@RequestMapping("/api/products")
public class ProductController {
    @Autowired
    private ProductService productService;
    @GetMapping("/")
    public List<Product> getAllProducts() {
        return productService.getAllProducts();
    }
    @GetMapping("/{id}")
    public Product getProductById(@PathVariable Long id) {
        return productService.getProductById(id);
    }
    @PostMapping("/add")
    public Map<String, Object> addProduct(@Valid @RequestBody Product product, BindingResult bindingResult) {
        Map<String, Object> result = new HashMap<>();
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            for (FieldError error : bindingResult.getFieldErrors()) {
                errors.put(error.getField(), error.getDefaultMessage());
            }
            result.put("success", false);
            result.put("errors", errors);
            return result;
        }
        productService.addProduct(product);
        result.put("success", true);
        result.put("message", "產(chǎn)品添加成功");
        return result;
    }
    @PutMapping("/edit/{id}")
    public Map<String, Object> editProduct(@PathVariable Long id, @Valid @RequestBody Product product, BindingResult bindingResult) {
        Map<String, Object> result = new HashMap<>();
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            for (FieldError error : bindingResult.getFieldErrors()) {
                errors.put(error.getField(), error.getDefaultMessage());
            }
            result.put("success", false);
            result.put("errors", errors);
            return result;
        }
        product.setId(id);
        productService.updateProduct(product);
        result.put("success", true);
        result.put("message", "產(chǎn)品更新成功");
        return result;
    }
    @DeleteMapping("/delete/{id}")
    public Map<String, Object> deleteProduct(@PathVariable Long id) {
        Map<String, Object> result = new HashMap<>();
        productService.deleteProduct(id);
        result.put("success", true);
        result.put("message", "產(chǎn)品刪除成功");
        return result;
    }
}

應用啟動類：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
@SpringBootApplication
@EnableCaching
public class CacheApplication {
    public static void main(String[] args) {
        SpringApplication.run(CacheApplication.class, args);
    }
}

測試類：

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.http.*;
import java.util.HashMap;
import java.util.Map;
import static org.assertj.core.api.Assertions.assertThat;
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class CacheApplicationTests {
    @LocalServerPort
    private int port;
    @Autowired
    private TestRestTemplate restTemplate;
    @Test
    void contextLoads() {
    }
    @Test
    void testAddProduct() {
        Map<String, Object> product = new HashMap<>();
        product.put("productId", "P006");
        product.put("productName", "耳機");
        product.put("price", 300.0);
        product.put("stock", 150);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Map<String, Object>> request = new HttpEntity<>(product, headers);
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/add",
                HttpMethod.POST,
                request,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
    @Test
    void testGetProductById() {
        ResponseEntity<Product> response = restTemplate.getForEntity("http://localhost:" + port + "/api/products/1", Product.class);
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody()).isNotNull();
        // 第二次請求，應該從緩存獲取
        response = restTemplate.getForEntity("http://localhost:" + port + "/api/products/1", Product.class);
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody()).isNotNull();
    }
    @Test
    void testUpdateProduct() {
        Map<String, Object> product = new HashMap<>();
        product.put("productId", "P001-Update");
        product.put("productName", "手機-更新");
        product.put("price", 1500.0);
        product.put("stock", 150);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Map<String, Object>> request = new HttpEntity<>(product, headers);
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/edit/1",
                HttpMethod.PUT,
                request,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
    @Test
    void testDeleteProduct() {
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/delete/1",
                HttpMethod.DELETE,
                null,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
}

? 結(jié)論：集成Spring Cache的步驟包括創(chuàng)建Spring Boot項目、添加所需的依賴、配置緩存、創(chuàng)建實體類、創(chuàng)建業(yè)務層、創(chuàng)建控制器類、測試應用。

35.4 緩存策略的配置與優(yōu)化

緩存策略的配置與優(yōu)化是Java開發(fā)中的重要內(nèi)容。

35.4.1 緩存策略的定義

定義：緩存策略是指對緩存進行配置和優(yōu)化的方法，包括緩存的添加、刪除、更新、淘汰等策略。
作用：

提高緩存的有效性。
提高系統(tǒng)的性能。
確保緩存的可靠性。

常見的緩存策略：

緩存的添加策略。
緩存的刪除策略。
緩存的更新策略。
緩存的淘汰策略。

? 結(jié)論：緩存策略是指對緩存進行配置和優(yōu)化的方法，作用是提高緩存的有效性、提高系統(tǒng)的性能、確保緩存的可靠性。

35.4.2 緩存策略的配置與優(yōu)化

定義：緩存策略的配置與優(yōu)化是指對緩存進行配置和優(yōu)化的方法。
示例：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
class ProductService {
    @Autowired
    private ProductRepository productRepository;
    @Cacheable("products")
    public List<Product> getAllProducts() {
        System.out.println("從數(shù)據(jù)庫獲取所有產(chǎn)品");
        return productRepository.getAllProducts();
    }
    @Cacheable(value = "product", key = "#id")
    public Product getProductById(Long id) {
        System.out.println("從數(shù)據(jù)庫獲取產(chǎn)品：" + id);
        return productRepository.getProductById(id);
    }
    @CachePut(value = "product", key = "#product.id")
    public Product addProduct(Product product) {
        System.out.println("添加產(chǎn)品到數(shù)據(jù)庫");
        productRepository.addProduct(product);
        return product;
    }
    @CachePut(value = "product", key = "#product.id")
    public Product updateProduct(Product product) {
        System.out.println("更新產(chǎn)品到數(shù)據(jù)庫：" + product.getId());
        productRepository.updateProduct(product);
        return product;
    }
    @CacheEvict(value = {"product", "products"}, key = "#id")
    public void deleteProduct(Long id) {
        System.out.println("刪除產(chǎn)品：" + id);
        productRepository.deleteProduct(id);
    }
}
import javax.validation.constraints.*;
class Product {
    private Long id;
    @NotBlank(message = "產(chǎn)品ID不能為空")
    @Size(min = 3, max = 10, message = "產(chǎn)品ID長度必須在3到10個字符之間")
    private String productId;
    @NotBlank(message = "產(chǎn)品名稱不能為空")
    @Size(min = 2, max = 50, message = "產(chǎn)品名稱長度必須在2到50個字符之間")
    private String productName;
    @Min(value = 0, message = "價格必須大于等于0")
    @Max(value = 10000, message = "價格必須小于等于10000")
    private double price;
    @Min(value = 0, message = "庫存必須大于等于0")
    private int stock;
    public Product() {
    }
    public Product(Long id, String productId, String productName, double price, int stock) {
        this.id = id;
        this.productId = productId;
        this.productName = productName;
        this.price = price;
        this.stock = stock;
    }
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getProductId() {
        return productId;
    }
    public void setProductId(String productId) {
        this.productId = productId;
    }
    public String getProductName() {
        return productName;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public int getStock() {
        return stock;
    }
    public void setStock(int stock) {
        this.stock = stock;
    }
    @Override
    public String toString() {
        return "Product{" +
                "id=" + id +
                ", productId='" + productId + '\'' +
                ", productName='" + productName + '\'' +
                ", price=" + price +
                ", stock=" + stock +
                '}';
    }
}
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
@Repository
class ProductRepository {
    private List<Product> products = new ArrayList<>();
    public ProductRepository() {
        products.add(new Product(1L, "P001", "手機", 1000.0, 100));
        products.add(new Product(2L, "P002", "電腦", 5000.0, 50));
        products.add(new Product(3L, "P003", "電視", 3000.0, 80));
        products.add(new Product(4L, "P004", "手表", 500.0, 200));
        products.add(new Product(5L, "P005", "耳機", 300.0, 150));
    }
    public List<Product> getAllProducts() {
        return products;
    }
    public Product getProductById(Long id) {
        return products.stream().filter(product -> product.getId().equals(id)).findFirst().orElse(null);
    }
    public void addProduct(Product product) {
        product.setId((long) (products.size() + 1));
        products.add(product);
    }
    public void updateProduct(Product product) {
        Product existingProduct = getProductById(product.getId());
        if (existingProduct != null) {
            existingProduct.setProductId(product.getProductId());
            existingProduct.setProductName(product.getProductName());
            existingProduct.setPrice(product.getPrice());
            existingProduct.setStock(product.getStock());
        }
    }
    public void deleteProduct(Long id) {
        products.removeIf(product -> product.getId().equals(id));
    }
}
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
@RequestMapping("/api/products")
class ProductController {
    @Autowired
    private ProductService productService;
    @GetMapping("/")
    public List<Product> getAllProducts() {
        return productService.getAllProducts();
    }
    @GetMapping("/{id}")
    public Product getProductById(@PathVariable Long id) {
        return productService.getProductById(id);
    }
    @PostMapping("/add")
    public Map<String, Object> addProduct(@Valid @RequestBody Product product, BindingResult bindingResult) {
        Map<String, Object> result = new HashMap<>();
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            for (FieldError error : bindingResult.getFieldErrors()) {
                errors.put(error.getField(), error.getDefaultMessage());
            }
            result.put("success", false);
            result.put("errors", errors);
            return result;
        }
        productService.addProduct(product);
        result.put("success", true);
        result.put("message", "產(chǎn)品添加成功");
        return result;
    }
    @PutMapping("/edit/{id}")
    public Map<String, Object> editProduct(@PathVariable Long id, @Valid @RequestBody Product product, BindingResult bindingResult) {
        Map<String, Object> result = new HashMap<>();
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            for (FieldError error : bindingResult.getFieldErrors()) {
                errors.put(error.getField(), error.getDefaultMessage());
            }
            result.put("success", false);
            result.put("errors", errors);
            return result;
        }
        product.setId(id);
        productService.updateProduct(product);
        result.put("success", true);
        result.put("message", "產(chǎn)品更新成功");
        return result;
    }
    @DeleteMapping("/delete/{id}")
    public Map<String, Object> deleteProduct(@PathVariable Long id) {
        Map<String, Object> result = new HashMap<>();
        productService.deleteProduct(id);
        result.put("success", true);
        result.put("message", "產(chǎn)品刪除成功");
        return result;
    }
}
@SpringBootApplication
@EnableCaching
public class CacheApplication {
    public static void main(String[] args) {
        SpringApplication.run(CacheApplication.class, args);
    }
}
// 測試類
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class CacheApplicationTests {
    @LocalServerPort
    private int port;
    @Autowired
    private TestRestTemplate restTemplate;
    @Test
    void contextLoads() {
    }
    @Test
    void testAddProduct() {
        Map<String, Object> product = new HashMap<>();
        product.put("productId", "P006");
        product.put("productName", "耳機");
        product.put("price", 300.0);
        product.put("stock", 150);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Map<String, Object>> request = new HttpEntity<>(product, headers);
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/add",
                HttpMethod.POST,
                request,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
    @Test
    void testGetProductById() {
        ResponseEntity<Product> response = restTemplate.getForEntity("http://localhost:" + port + "/api/products/1", Product.class);
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody()).isNotNull();
        response = restTemplate.getForEntity("http://localhost:" + port + "/api/products/1", Product.class);
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody()).isNotNull();
    }
    @Test
    void testUpdateProduct() {
        Map<String, Object> product = new HashMap<>();
        product.put("productId", "P001-Update");
        product.put("productName", "手機-更新");
        product.put("price", 1500.0);
        product.put("stock", 150);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Map<String, Object>> request = new HttpEntity<>(product, headers);
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/edit/1",
                HttpMethod.PUT,
                request,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
    @Test
    void testDeleteProduct() {
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/delete/1",
                HttpMethod.DELETE,
                null,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
}

? 結(jié)論：緩存策略的配置與優(yōu)化是指對緩存進行配置和優(yōu)化的方法，需要根據(jù)實際問題選擇合適的緩存策略。

35.5 Spring Boot的實際應用場景

在實際開發(fā)中，Spring Boot緩存管理與優(yōu)化的應用場景非常廣泛，如：

實現(xiàn)產(chǎn)品信息的緩存。
實現(xiàn)用戶信息的緩存。
實現(xiàn)訂單信息的緩存。
實現(xiàn)頁面數(shù)據(jù)的緩存。

示例：

import javax.validation.constraints.*;
class Product {
    private Long id;
    @NotBlank(message = "產(chǎn)品ID不能為空")
    @Size(min = 3, max = 10, message = "產(chǎn)品ID長度必須在3到10個字符之間")
    private String productId;
    @NotBlank(message = "產(chǎn)品名稱不能為空")
    @Size(min = 2, max = 50, message = "產(chǎn)品名稱長度必須在2到50個字符之間")
    private String productName;
    @Min(value = 0, message = "價格必須大于等于0")
    @Max(value = 10000, message = "價格必須小于等于10000")
    private double price;
    @Min(value = 0, message = "庫存必須大于等于0")
    private int stock;
    public Product() {
    }
    public Product(Long id, String productId, String productName, double price, int stock) {
        this.id = id;
        this.productId = productId;
        this.productName = productName;
        this.price = price;
        this.stock = stock;
    }
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getProductId() {
        return productId;
    }
    public void setProductId(String productId) {
        this.productId = productId;
    }
    public String getProductName() {
        return productName;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public int getStock() {
        return stock;
    }
    public void setStock(int stock) {
        this.stock = stock;
    }
    @Override
    public String toString() {
        return "Product{" +
                "id=" + id +
                ", productId='" + productId + '\'' +
                ", productName='" + productName + '\'' +
                ", price=" + price +
                ", stock=" + stock +
                '}';
    }
}
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
@Repository
class ProductRepository {
    private List<Product> products = new ArrayList<>();
    public ProductRepository() {
        products.add(new Product(1L, "P001", "手機", 1000.0, 100));
        products.add(new Product(2L, "P002", "電腦", 5000.0, 50));
        products.add(new Product(3L, "P003", "電視", 3000.0, 80));
        products.add(new Product(4L, "P004", "手表", 500.0, 200));
        products.add(new Product(5L, "P005", "耳機", 300.0, 150));
    }
    public List<Product> getAllProducts() {
        return products;
    }
    public Product getProductById(Long id) {
        return products.stream().filter(product -> product.getId().equals(id)).findFirst().orElse(null);
    }
    public void addProduct(Product product) {
        product.setId((long) (products.size() + 1));
        products.add(product);
    }
    public void updateProduct(Product product) {
        Product existingProduct = getProductById(product.getId());
        if (existingProduct != null) {
            existingProduct.setProductId(product.getProductId());
            existingProduct.setProductName(product.getProductName());
            existingProduct.setPrice(product.getPrice());
            existingProduct.setStock(product.getStock());
        }
    }
    public void deleteProduct(Long id) {
        products.removeIf(product -> product.getId().equals(id));
    }
}
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
class ProductService {
    @Autowired
    private ProductRepository productRepository;
    @Cacheable("products")
    public List<Product> getAllProducts() {
        System.out.println("從數(shù)據(jù)庫獲取所有產(chǎn)品");
        return productRepository.getAllProducts();
    }
    @Cacheable(value = "product", key = "#id")
    public Product getProductById(Long id) {
        System.out.println("從數(shù)據(jù)庫獲取產(chǎn)品：" + id);
        return productRepository.getProductById(id);
    }
    @CachePut(value = "product", key = "#product.id")
    public Product addProduct(Product product) {
        System.out.println("添加產(chǎn)品到數(shù)據(jù)庫");
        productRepository.addProduct(product);
        return product;
    }
    @CachePut(value = "product", key = "#product.id")
    public Product updateProduct(Product product) {
        System.out.println("更新產(chǎn)品到數(shù)據(jù)庫：" + product.getId());
        productRepository.updateProduct(product);
        return product;
    }
    @CacheEvict(value = {"product", "products"}, key = "#id")
    public void deleteProduct(Long id) {
        System.out.println("刪除產(chǎn)品：" + id);
        productRepository.deleteProduct(id);
    }
}
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
@RequestMapping("/api/products")
class ProductController {
    @Autowired
    private ProductService productService;
    @GetMapping("/")
    public List<Product> getAllProducts() {
        return productService.getAllProducts();
    }
    @GetMapping("/{id}")
    public Product getProductById(@PathVariable Long id) {
        return productService.getProductById(id);
    }
    @PostMapping("/add")
    public Map<String, Object> addProduct(@Valid @RequestBody Product product, BindingResult bindingResult) {
        Map<String, Object> result = new HashMap<>();
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            for (FieldError error : bindingResult.getFieldErrors()) {
                errors.put(error.getField(), error.getDefaultMessage());
            }
            result.put("success", false);
            result.put("errors", errors);
            return result;
        }
        productService.addProduct(product);
        result.put("success", true);
        result.put("message", "產(chǎn)品添加成功");
        return result;
    }
    @PutMapping("/edit/{id}")
    public Map<String, Object> editProduct(@PathVariable Long id, @Valid @RequestBody Product product, BindingResult bindingResult) {
        Map<String, Object> result = new HashMap<>();
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            for (FieldError error : bindingResult.getFieldErrors()) {
                errors.put(error.getField(), error.getDefaultMessage());
            }
            result.put("success", false);
            result.put("errors", errors);
            return result;
        }
        product.setId(id);
        productService.updateProduct(product);
        result.put("success", true);
        result.put("message", "產(chǎn)品更新成功");
        return result;
    }
    @DeleteMapping("/delete/{id}")
    public Map<String, Object> deleteProduct(@PathVariable Long id) {
        Map<String, Object> result = new HashMap<>();
        productService.deleteProduct(id);
        result.put("success", true);
        result.put("message", "產(chǎn)品刪除成功");
        return result;
    }
}
@SpringBootApplication
@EnableCaching
public class CacheApplication {
    public static void main(String[] args) {
        SpringApplication.run(CacheApplication.class, args);
    }
}
// 測試類
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class CacheApplicationTests {
    @LocalServerPort
    private int port;
    @Autowired
    private TestRestTemplate restTemplate;
    @Test
    void contextLoads() {
    }
    @Test
    void testAddProduct() {
        Map<String, Object> product = new HashMap<>();
        product.put("productId", "P006");
        product.put("productName", "耳機");
        product.put("price", 300.0);
        product.put("stock", 150);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Map<String, Object>> request = new HttpEntity<>(product, headers);
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/add",
                HttpMethod.POST,
                request,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
    @Test
    void testGetProductById() {
        ResponseEntity<Product> response = restTemplate.getForEntity("http://localhost:" + port + "/api/products/1", Product.class);
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody()).isNotNull();
        response = restTemplate.getForEntity("http://localhost:" + port + "/api/products/1", Product.class);
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody()).isNotNull();
    }
    @Test
    void testUpdateProduct() {
        Map<String, Object> product = new HashMap<>();
        product.put("productId", "P001-Update");
        product.put("productName", "手機-更新");
        product.put("price", 1500.0);
        product.put("stock", 150);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Map<String, Object>> request = new HttpEntity<>(product, headers);
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/edit/1",
                HttpMethod.PUT,
                request,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
    @Test
    void testDeleteProduct() {
        ResponseEntity<Map> response = restTemplate.exchange(
                "http://localhost:" + port + "/api/products/delete/1",
                HttpMethod.DELETE,
                null,
                Map.class
        );
        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
        assertThat(response.getBody().get("success")).isEqualTo(true);
    }
}

輸出結(jié)果：

第一次請求獲取所有產(chǎn)品：從數(shù)據(jù)庫獲取所有產(chǎn)品。
第二次請求獲取所有產(chǎn)品：從緩存獲取。
第一次請求獲取產(chǎn)品1：從數(shù)據(jù)庫獲取。
第二次請求獲取產(chǎn)品1：從緩存獲取。

? 結(jié)論：在實際開發(fā)中，Spring Boot緩存管理與優(yōu)化的應用場景非常廣泛，需要根據(jù)實際問題選擇合適的緩存策略和優(yōu)化方法。

總結(jié)

本章我們學習了Spring Boot緩存管理與優(yōu)化，包括緩存的定義與特點、Spring Boot與緩存的集成、緩存策略的配置與優(yōu)化、Spring Boot的實際應用場景，學會了在實際開發(fā)中處理緩存管理與優(yōu)化問題。其中，緩存的定義與特點、Spring Boot與緩存的集成、緩存策略的配置與優(yōu)化、Spring Boot的實際應用場景是本章的重點內(nèi)容。從下一章開始，我們將學習Spring Boot的其他組件、微服務等內(nèi)容。

到此這篇關于Spring Boot 緩存管理與優(yōu)化實例教程的文章就介紹到這了,更多相關springboot緩存管理與優(yōu)化內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！

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