通过jackson将对象与JSON之间相互转化

妖狐艹你老母 2023-10-11 22:29 69阅读 0赞

1.导入依赖

<dependency>  
<groupId>com.fasterxml.jackson.core</groupId>  
<artifactId>jackson-databind</artifactId>  
<version>2.9.5</version>  
</dependency>

<dependency>  
<groupId>com.fasterxml.jackson.core</groupId>  
<artifactId>jackson-core</artifactId>  
<version>2.9.5</version>  
</dependency>

<dependency>  
<groupId>com.fasterxml.jackson.core</groupId>  
<artifactId>jackson-annotations</artifactId>  
<version>2.9.5</version>  
</dependency>

2.测试用对象

public class VoucherDzDetailResponse {
    
        private String eInvoiceId;
        private String fileUrl;
        private Contents Content;

3.测试demo

@Test
    public void TestObjectMapper() throws Exception{
    
        ObjectMapper objectMapper = new ObjectMapper();
    
        //序列化的时候序列对象的所有属性
        objectMapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
    
        //反序列化的时候如果多了其他属性,不抛出异常
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    
        //如果是空对象的时候,不抛异常
        objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
    
        //取消时间的转化格式,默认是时间戳,可以取消,同时需要设置要表现的时间格式
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
    
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
    
        VoucherDzDetailResponse voucherDzDetailResponse = new VoucherDzDetailResponse();
        voucherDzDetailResponse.setFileUrl("http://221.7.95.99:1919");
        voucherDzDetailResponse.setEInvoiceId("475200");
    
        String value = objectMapper.writeValueAsString(voucherDzDetailResponse);
        System.out.println(value);
    
        VoucherDzDetailResponse response = objectMapper.readValue(value, VoucherDzDetailResponse.class);
        System.out.println(response);
    
        System.out.println("结束标志");
    
    }

将map与json相互转化同理

@Test
    public void TestObjectMapper2() throws Exception{
    
        ObjectMapper objectMapper = new ObjectMapper();
    
        //序列化的时候序列对象的所有属性
        objectMapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
    
        //反序列化的时候如果多了其他属性,不抛出异常
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    
        //如果是空对象的时候,不抛异常
        objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
    
        //取消时间的转化格式,默认是时间戳,可以取消,同时需要设置要表现的时间格式
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
    
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
    
        Map map = new HashMap();
        map.put("fileUrl","http://221.7.95.99:1919/eServer/zlb/getofdz");
        map.put("eInvoiceId","475200");
    
        String value = objectMapper.writeValueAsString(map);
        System.out.println(value);
    
        Map response = objectMapper.readValue(value, Map.class);
        System.out.println(response);
    
        System.out.println("结束标志");
    
    }