317 lines
10 KiB
Markdown
317 lines
10 KiB
Markdown
# 在 Spring 中集成 Fastjson2
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# 0. 依赖配置
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Fastjson2采用多module的结构设计,对SpringFramework等框架的支持现独立在`extension`包中。
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`Maven`:
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```xml
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<dependency>
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<groupId>com.alibaba.fastjson2</groupId>
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<artifactId>fastjson2-extension-spring5</artifactId>
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<version>2.0.49</version>
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</dependency>
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or
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<dependency>
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<groupId>com.alibaba.fastjson2</groupId>
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<artifactId>fastjson2-extension-spring6</artifactId>
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<version>2.0.49</version>
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</dependency>
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```
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`Gradle`:
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```groovy
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dependencies {
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implementation 'com.alibaba.fastjson2:fastjson2-extension-spring5:2.0.49'
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}
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or
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dependencies {
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implementation 'com.alibaba.fastjson2:fastjson2-extension-spring6:2.0.49'
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}
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```
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> 2.0.23版本之后为了兼容Spring 5.x / 6.x,将不同版本独立开不同的依赖包。
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> 如使用2.0.23之前的版本,请参考:
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`Maven`:
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```xml
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<dependency>
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<groupId>com.alibaba.fastjson2</groupId>
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<artifactId>fastjson2-extension</artifactId>
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<version>2.0.x</version>
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</dependency>
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```
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`Gradle`:
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```groovy
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dependencies {
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implementation 'com.alibaba.fastjson2:fastjson2-extension:2.0.x'
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}
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```
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# 1. 参数配置
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Fastjson2对于序列化和反序列化的行为进行了重新设计,所以`FastJsonConfig`也会重新适配。
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**Package**: `com.alibaba.fastjson2.support.config.FastJsonConfig`
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**Attributes**:
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参数 | 类型 | 描述
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---- | ---- | ----
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charset | Charset | 指定的字符集,默认UTF-8
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dateFormat | String | 指定的日期格式,默认yyyy-MM-dd HH:mm:ss
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writerFilters | Filter[] | 配置序列化过滤器
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writerFeatures | JSONWriter.Feature[] | 配置序列化的指定行为,更多配置请见:[Features](features_cn.md)
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readerFilters | Filter[] | 配置反序列化过滤器
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readerFeatures | JSONReader.Feature[] | 配置反序列化的指定行为,更多配置请见:[Features](features_cn.md)
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jsonb | boolean | 是否采用JSONB进行序列化和反序列化,默认false
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symbolTable | JSONB.SymbolTable | JSONB序列化和反序列化的符号表,只有使用JSONB时生效
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# 2. 在 Spring Web MVC 中集成 Fastjson2
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在Fastjson2中,同样可以使用`FastJsonHttpMessageConverter` 和 `FastJsonJsonView` 为 Spring MVC 构建的 Web 应用提供更好的性能体验。
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## 2.1 Spring Web MVC Converter
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使用 `FastJsonHttpMessageConverter` 来替换 Spring MVC 默认的 `HttpMessageConverter`
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以提高 `@RestController` `@ResponseBody` `@RequestBody` 注解的 JSON序列化和反序列化速度。
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**Package**: `com.alibaba.fastjson2.support.spring.http.converter.FastJsonHttpMessageConverter`
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**Example**:
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```java
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@Configuration
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@EnableWebMvc
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public class WebMvcConfigurer extends WebMvcConfigurerAdapter {
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@Override
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public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
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FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
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//自定义配置...
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FastJsonConfig config = new FastJsonConfig();
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config.setDateFormat("yyyy-MM-dd HH:mm:ss");
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config.setReaderFeatures(JSONReader.Feature.FieldBased, JSONReader.Feature.SupportArrayToBean);
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config.setWriterFeatures(JSONWriter.Feature.WriteMapNullValue, JSONWriter.Feature.PrettyFormat);
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converter.setFastJsonConfig(config);
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converter.setDefaultCharset(StandardCharsets.UTF_8);
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converter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
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converters.add(0, converter);
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}
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}
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```
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## 2.2 Spring Web MVC View
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使用 `FastJsonJsonView` 来设置 Spring MVC 默认的视图模型解析器,以提高 `@Controller` `@ResponseBody` `ModelAndView` JSON序列化速度。
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**Package**: `com.alibaba.fastjson2.support.spring.webservlet.view.FastJsonJsonView`
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**Example**:
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```java
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@Configuration
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@EnableWebMvc
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public class WebMvcConfigurer extends WebMvcConfigurerAdapter {
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@Override
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public void configureViewResolvers(ViewResolverRegistry registry) {
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FastJsonJsonView fastJsonJsonView = new FastJsonJsonView();
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//自定义配置...
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//FastJsonConfig config = new FastJsonConfig();
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//config.set...
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//fastJsonJsonView.setFastJsonConfig(config);
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registry.enableContentNegotiation(fastJsonJsonView);
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}
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}
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```
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> 参考:Spring Framework 官方文档 Spring Web MVC 部分,[查看更多](https://docs.spring.io/spring-framework/docs/current/reference/html/web.html#mvc-config) 。
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# 3. 在 Spring Web Socket 中集成 Fastjson2
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在Fastjson2中,同样也对 Spring WebSocket 给予支持,可以使用 `FastjsonSockJsMessageCodec` 进行配置。
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**Package**: `com.alibaba.fastjson2.support.spring.websocket.sockjs.FastjsonSockJsMessageCodec`
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**Example**:
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```java
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@Component
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@EnableWebSocket
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public class WebSocketConfig extends WebMvcConfigurerAdapter implements WebSocketConfigurer {
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@Resource
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WebSocketHandler handler;
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public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
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//自定义配置...
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//FastjsonSockJsMessageCodec messageCodec = new FastjsonSockJsMessageCodec();
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//FastJsonConfig config = new FastJsonConfig();
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//config.set...
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//messageCodec.setFastJsonConfig(config);
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registry.addHandler(handler, "/sockjs").withSockJS().setMessageCodec(new FastjsonSockJsMessageCodec());
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}
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}
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```
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> 参考:Spring Framework 官方文档 Spring Web Socket 部分,[查看更多](https://docs.spring.io/spring-framework/docs/current/reference/html/web.html#websocket) 。
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# 4. 在 Spring Data Redis 中集成 Fastjson2
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在Fastjson2中,同样可以使用 `GenericFastJsonRedisSerializer` 或 `FastJsonRedisSerializer` 为 Spring Data Redis 提供更好的性能体验。
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## 4.1 Generic Redis Serializer
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使用 `GenericFastJsonRedisSerializer` 作为 `RedisTemplate` 的 `RedisSerializer` 来提升JSON序列化和反序列化速度。
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**Package**: `com.alibaba.fastjson2.support.spring.data.redis.GenericFastJsonRedisSerializer`
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**Example**:
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```java
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@Configuration
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public class RedisConfiguration {
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@Bean
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public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
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RedisTemplate redisTemplate = new RedisTemplate();
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redisTemplate.setConnectionFactory(redisConnectionFactory);
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GenericFastJsonRedisSerializer fastJsonRedisSerializer = new GenericFastJsonRedisSerializer();
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redisTemplate.setDefaultSerializer(fastJsonRedisSerializer);//设置默认的Serialize,包含 keySerializer & valueSerializer
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//redisTemplate.setKeySerializer(fastJsonRedisSerializer);//单独设置keySerializer
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//redisTemplate.setValueSerializer(fastJsonRedisSerializer);//单独设置valueSerializer
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return redisTemplate;
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}
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}
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```
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## 4.2 Customized Redis Serializer
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通常使用 `GenericFastJsonRedisSerializer` 即可满足大部分场景,如果你想定义特定类型专用的 `RedisTemplate` 可以使用 `FastJsonRedisSerializer`
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来代替 `GenericFastJsonRedisSerializer` ,配置是类似的。
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**Package**: `com.alibaba.fastjson2.support.spring.data.redis.FastJsonRedisSerializer`
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**Example**:
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```java
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@Configuration
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public class RedisConfiguration {
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@Bean
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public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
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RedisTemplate redisTemplate = new RedisTemplate();
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redisTemplate.setConnectionFactory(redisConnectionFactory);
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FastJsonRedisSerializer fastJsonRedisSerializer = new FastJsonRedisSerializer(User.class);
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redisTemplate.setDefaultSerializer(fastJsonRedisSerializer);
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return redisTemplate;
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}
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}
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```
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## 4.3 JSONB Redis Serializer
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如果你准备使用 JSONB 作为对象序列/反序列化的方式并对序列化速度有较高的要求的话,可以对jsonb参数进行配置,该参数是 fastjson 2.0.6 版本中新增的支持,配置也很简单。
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**Example**:
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```java
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@Configuration
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public class RedisConfiguration {
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@Bean
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public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
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RedisTemplate redisTemplate = new RedisTemplate();
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redisTemplate.setConnectionFactory(redisConnectionFactory);
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// GenericFastJsonRedisSerializer use jsonb
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// GenericFastJsonRedisSerializer fastJsonRedisSerializer = new GenericFastJsonRedisSerializer(true);
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// FastJsonRedisSerializer use jsonb
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FastJsonRedisSerializer fastJsonRedisSerializer = new FastJsonRedisSerializer(User.class);
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// FastJsonConfig fastJsonConfig = new FastJsonConfig();
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// fastJsonConfig.setJSONB(true);
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// fastJsonRedisSerializer.setFastJsonConfig(fastJsonConfig);
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redisTemplate.setDefaultSerializer(fastJsonRedisSerializer);
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return redisTemplate;
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}
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}
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```
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> 参考:Spring Data Redis 官方文档,[查看更多](https://docs.spring.io/spring-data/redis/docs/current/reference/html/) 。
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# 5. 在 Spring Messaging 中集成 Fastjson2
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在Fastjson2中,同样可以使用 `MappingFastJsonMessageConverter` 为 Spring Messaging 提供更好的性能体验。
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## 5.1 JSON Message Converter
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使用 `MappingFastJsonMessageConverter` 作为 Spring Cloud Stream 或 Spring Messaging 来提升Message的序列化和反序列化速度。
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**Package**: `com.alibaba.fastjson2.support.spring.messaging.converter.MappingFastJsonMessageConverter`
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**Example**:
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```java
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@Configuration
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public class StreamConfiguration {
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@Bean
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@StreamMessageConverter
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public MappingFastJsonMessageConverter messageConverter() {
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return new MappingFastJsonMessageConverter();
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}
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}
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```
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## 5.2 JSONB Message Converter
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如果你准备使用 JSONB 作为对象序列/反序列化的方式并对序列化速度有较高的要求的话,可以对 `FastJsonConfig` 的 `jsonb` 参数进行配置,该参数是 fastjson 2.0.6 版本中新增的支持,配置也很简单。
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_注意:JSONB仅支持将Message的payload序列化为byte[]_
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**Example**:
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```java
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@Configuration
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public class StreamConfiguration {
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@Bean
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@StreamMessageConverter
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public MappingFastJsonMessageConverter messageConverter() {
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MappingFastJsonMessageConverter messageConverter = new MappingFastJsonMessageConverter();
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FastJsonConfig fastJsonConfig = new FastJsonConfig();
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fastJsonConfig.setJSONB(true); // use jsonb
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messageConverter.setFastJsonConfig(fastJsonConfig);
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return messageConverter;
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}
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}
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```
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> 参考:Spring Messaging 官方文档,[查看更多](https://docs.spring.io/spring-boot/docs/current/reference/html/messaging.html#messaging) 。
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