java8 LocalDate 类型 json 解析日期格式处理

迈不过友情╰ 2022-06-11 09:38 449阅读 0赞

在使用java8的过程中用到了新的日期类LocalDate、LocalDateTime类型，作为属性不经过任何处理转成json的时候会变成下面的样式。

"applicationTime": {
            "month": "AUGUST",
            "year": 2017,
            "dayOfMonth": 2,
            "dayOfWeek": "WEDNESDAY",
            "dayOfYear": 214,
            "monthValue": 8,
            "hour": 16,
            "minute": 38,
            "second": 53,
            "nano": 0,
            "chronology": {
              "id": "ISO",
              "calendarType": "iso8601"
            }
          },

如何才能变成字符串的yyyy-MM-dd，需要导入几个类库

<properties>
        <jackson.version>2.8.5</jackson.version>
    </properties>
    
    
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            
            <dependency>
                <groupId>com.fasterxml.jackson.datatype</groupId>
                <artifactId>jackson-datatype-jsr310</artifactId>
                <version>${jackson.version}</version>
            </dependency>

只有jackson-datatype-jsr310是用来格式化日期用的

@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
     private LocalDateTime applicationTime;

或者

@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
     private LocalDateTime applicationTime;

加上@JsonFormat注解，这样最后当对象转成json的时候就变成了

"applicationTime": "2017-08-02 16:38:59",