阿超
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编写一个spring-boot-starter-fastjson
酷烈之祸，多起于玩忽之人；盛满之功，常败于细微之事。——《菜根谭》
这个starter是自己写的，主要就是注入了个FastJsonConfig
写法如下：首先引入gav，完整pom.xml如下：
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| <?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ruben</groupId>
<artifactId>spring-boot-starter-fastjson</artifactId>
<version>1.0</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<spring-boot.version>2.3.7.RELEASE</spring-boot.version>
<fastjson-version>1.2.79</fastjson-version>
<lombok-version>1.18.22</lombok-version>
<hutool-version>5.7.22</hutool-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-core</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>${fastjson-version}</version>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-bom</artifactId>
<version>${hutool-version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
|
然后是编写Configuration和Properties
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| package com.ruben.config;
import java.time.LocalDate;
import java.time.LocalDateTime;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import cn.hutool.core.date.LocalDateTimeUtil;
import cn.hutool.core.lang.Opt;
@EnableConfigurationProperties(FastJsonProperties.class)
public class FastJsonAutoConfiguration {
@Bean
@ConditionalOnMissingBean
public FastJsonConfig fastJsonConfig(FastJsonProperties fastJsonProperties) {
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(SerializerFeature.BrowserCompatible,
SerializerFeature.DisableCircularReferenceDetect,
SerializerFeature.WriteEnumUsingToString);
SerializeConfig serializeConfig = SerializeConfig.globalInstance;
fastJsonConfig.setDateFormat(fastJsonProperties.getDatePattern());
serializeConfig.put(LocalDateTime.class, (serializer, object, fieldName, fieldType, features) ->
Opt.ofNullable(object).ifPresentOrElse(obj ->
serializer.out.writeString(
LocalDateTimeUtil.format((LocalDateTime) obj, fastJsonProperties.getLocalDateTimePattern())
),
serializer.out::writeNull));
serializeConfig.put(LocalDate.class, (serializer, object, fieldName, fieldType, features) ->
Opt.ofNullable(object).ifPresentOrElse(obj -> serializer.out.writeString(
LocalDateTimeUtil.format((LocalDate) obj, fastJsonProperties.getLocalDatePattern())
),
serializer.out::writeNull));
fastJsonConfig.setSerializeConfig(serializeConfig);
ParserConfig parserConfig = ParserConfig.getGlobalInstance();
fastJsonConfig.setParserConfig(parserConfig);
return fastJsonConfig;
}
}
|
Properties这里简单用于设定时间日期格式化的表达式
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| package com.ruben.config;
import org.springframework.boot.context.properties.ConfigurationProperties;
import cn.hutool.core.date.DatePattern;
import lombok.Data;
@Data
@ConfigurationProperties(FastJsonProperties.PREFIX)
public class FastJsonProperties {
public static final String PREFIX = "fastjson";
private String datePattern = DatePattern.NORM_DATETIME_PATTERN;
private String localDateTimePattern = DatePattern.NORM_DATETIME_PATTERN;
private String localDatePattern = DatePattern.NORM_DATE_PATTERN;
}
|
然后别忘了在resources下配置
目录结构如下：
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| src
└ main
└ java
└ resources
└ META-INF
└ spring.factories
|
目录对了一般会有图标提示
spring.factories里面指定我们的配置类
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| org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.ruben.config.FastJsonAutoConfiguration
|
我们可以尝试使用一下，首先用maven进行install
然后到另一个项目中使用
引入GAV
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| <dependency>
<groupId>com.ruben</groupId>
<artifactId>spring-boot-starter-fastjson</artifactId>
<version>1.0</version>
</dependency>
|
配置文件这边其实已经可以看到提示了
我们配置其中一个
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| fastjson:
date-pattern: yyyy年MM月dd日
|
测试一下：
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| package com.ruben.simplescaffold;
import javax.annotation.Resource;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import com.alibaba.fastjson.support.config.FastJsonConfig;
@SpringBootTest
class SimpleScaffoldApplicationTests {
@Resource
private FastJsonConfig fastJsonConfig;
@Test
void testFastJsonConfig() {
Assertions.assertEquals(fastJsonConfig.getDateFormat(), "yyyy年MM月dd日");
}
}
|
成功~
starter的完整代码我放到了这里：https://gitee.com/VampireAchao/spring-boot-starter-fastjson.git