今天在做Docker的管理工具時，遇到一個解析JSON串的問題，由於Docker返回的JSON屬性的首字母都為大寫，如下

[
    {
        "Created": 1422514187,
        "Id": "2ef051877a7aeb4041c343b2f941a7628c5787fc1d4dbcdd3cf4af71cd28cab4",
        "ParentId": "372c34633691fea23decca8f2c400877ad33b6ecddcd899a20b9cb9734f0265d",
        "RepoTags": [
            "zhangjy/starsms:v2"
        ],
        "Size": 0,
        "VirtualSize": 703334375
    }
]
 

物件定義如下

package com.dms.domain;

import java.io.Serializable;
import java.util.List;

import com.fasterxml.jackson.annotation.JsonProperty;

public class Image implements Serializable {

	private static final long serialVersionUID = -895599442916010326L;

	private Long created;

	private String id;

	private String parentId;

	private List<String> repoTags;

	private Long size;

	private Long virtualSize;

	private String host;

	//getters and setters

}
 

解決方法如下：

一是，將Image物件的屬性首字母都改為大寫，且是public型別，但這種命名感覺很彆扭

二是，使用Jackson的JsonProperty註解

package com.dms.domain;

import java.io.Serializable;
import java.util.List;

import com.fasterxml.jackson.annotation.JsonProperty;

public class Image implements Serializable {

	private static final long serialVersionUID = -895599442916010326L;

	@JsonProperty(value = "Created")
	private Long created;

	@JsonProperty(value = "Id")
	private String id;

	@JsonProperty(value = "ParentId")
	private String parentId;

	@JsonProperty(value = "RepoTags")
	private List<String> repoTags;

	@JsonProperty(value = "Size")
	private Long size;

	@JsonProperty(value = "VirtualSize")
	private Long virtualSize;

	private String host;

	public Long getCreated() {
		return created;
	}

	public void setCreated(Long created) {
		this.created = created;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getParentId() {
		return parentId;
	}

	public void setParentId(String parentId) {
		this.parentId = parentId;
	}

	public List<String> getRepoTags() {
		return repoTags;
	}

	public void setRepoTags(List<String> repoTags) {
		this.repoTags = repoTags;
	}

	public Long getSize() {
		return size;
	}

	public void setSize(Long size) {
		this.size = size;
	}

	public Long getVirtualSize() {
		return virtualSize;
	}

	public void setVirtualSize(Long virtualSize) {
		this.virtualSize = virtualSize;
	}

	public String getHost() {
		return host;
	}

	public void setHost(String host) {
		this.host = host;
	}

}