fast-json.jar的使用方法

fast-json.jar的使用方法

fast-json.jar 解析json資料：一種json資料解析方式是這樣的，點擊這裡下載jsonfast.jar+fastjsonAPI文檔

[    {        "id": 6378,        "title": "test",        "img": "http://image.jxvdy.com/2014/0929/5428d91c9e6dc8f78fd99_0.png",        "score": 0,        "description": "test",        "time": 1411963174    },    {        "id": 6142,        "title": "微電影多角度拍攝技巧（三）",        "img": "http://image.jxvdy.com/old/201409/24/11-54-15-17-1531.jpg",        "score": 0,        "description": "",        "time": 1411530850    },    {        "id": 6141,        "title": "微電影多角度拍攝技巧（一）",        "img": "http://image.jxvdy.com/old/201409/24/11-54-04-89-1531.jpg",        "score": 0,        "description": "",        "time": 1411530835    },    {        "id": 6140,        "title": "微電影多角度拍攝技巧（二）",        "img": "http://image.jxvdy.com/old/201409/24/11-49-54-18-1531.jpg",        "score": 0,        "description": "",        "time": 1411530552    },    {        "id": 4355,        "title": "施比受，更有福",        "img": "http://image.jxvdy.com/old/201409/24/11-46-06-65-3.jpg",        "score": 0,        "description": "一位老人用自己的一半時間去協助他人，贈予協助，收穫快樂",        "time": 1411530082    },    {        "id": 4354,        "title": "父子時光之旅",        "img": "http://image.jxvdy.com/old/201409/24/11-35-13-81-3.jpg",        "score": 0,        "description": "當父親老去，忙於生活的男人沒有時間照顧體弱的父親，於是，帶上父親上路吧，帶他重走當年他走過無數遍的那段旅程",        "time": 1411529699    }]

對於這一種json資料，使用fastjson進行解析的時候，調用方法之前應該先寫出其對應的bean.java（我想你已經做過了）；上面的json資料對應的bean是這樣的，

public class NewMoviesBean {private int id;private String title;private String img;private String score;private String description;private int time;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getImg() {return img;}public void setImg(String img) {this.img = img;}public String getScore() {return score;}public void setScore(String score) {this.score = score;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}public int getTime() {return time;}public void setTime(int time) {this.time = time;}public NewMoviesBean(int id, String title, String img, String score,String description, int time) {super();this.id = id;this.title = title;this.img = img;this.score = score;this.description = description;this.time = time;}public NewMoviesBean() {super();}@Overridepublic String toString() {return "NewMoviesBean [id=" + id + ", title=" + title + ", img=" + img+ ", score=" + score + ", description=" + description+ ", time=" + time + "]";}}

那麼對應的解析方法是這樣的：

JSON.parseArray(json, NewMoviesBean.class);

為甚麼回事這種解析方式呢？因為，分析整個json資料的格式我們能發現，最外層是中括弧"[ ]",內側是大括弧"{ }";中括弧說明整個json資料為一個數群組類型，其中的大括弧說明是數組中的元素；說明整個就是一個JSONArray,JSONArray中元素又是一個個的JSONObject。

另一種的解析方式：json資料是這樣的，

{"type": [        "恐怖",        "劇情"    ]},

分析這種形式，大括弧裡面是小括弧。也即是數組整體是通過鍵值對的形式呈現的。那麼最外層就是一個JSONObject，KEY對應的就是JSONArray。應該這樣：

JSONArray jsonArrayType = JSONObject.getJSONArray("type");String[] type = new String[jsonArrayType.size()];for (int j = 0; j < jsonArrayType.size(); j++) {type[j] = (String)jsonArrayType.get(j);}

這樣就能夠解析出想要的資料。

與上面類似的另一種解析：json資料是這樣的：

{        "playurl": {            "360P": "http://v.jxvdy.com/sendfile/V7bzjsH5sIZlBzVG7t7qbL1u-y1_k6E0DCtzyZ8iv-pRF3GmewWOj-HQ_grNppGnnx_rRHb-bztNWAvzGQ",            "480P": "http://v.jxvdy.com/sendfile/V7bzjsH5sIZlBzVG7t7qbL1u-y1_k6E0DCtzyZ8iv-pRF3GmewWOj-HQ_grNppGnnx_rRHb-bztNWAvzGT",            "720P": "http://v.jxvdy.com/sendfile/V7bzjsH5sIZlBzVG7t7qbL1u-y1_k6E0DCtzyZ8iv-pRF3GmewWOj-HQ_grNppGnnx_rRHb-bztNWAvzGZ"        }    }

這種形式，外層大括弧裡面是一個鍵KEY對應了另一個大括弧元素，那麼其最外層是一個JSONObject；內層KEY對應的也是一個JSONObject。

當然也可以先建立開一個bean：

public class MoviedefinitionBean {private String normalP;private String hightP;private String superP;public String getNormalP() {return normalP;}public void setNormalP(String normalP) {this.normalP = normalP;}public String getHightP() {return hightP;}public void setHightP(String hightP) {this.hightP = hightP;}public String getSuperP() {return superP;}public void setSuperP(String superP) {this.superP = superP;}public MoviedefinitionBean(String normalP, String hightP, String superP) {super();this.normalP = normalP;this.hightP = hightP;this.superP = superP;}public MoviedefinitionBean() {super();}@Overridepublic String toString() {return "MoviedefinitionBean [normalP=" + normalP + ", hightP=" + hightP+ ", superP=" + superP + "]";}}

然後對此做出解析：

JSONObject jsonObjectDefination = jsonObject.getJSONObject("playurl");String normalP = jsonObjectDefination.getString("360P");String hightP = jsonObjectDefination.getString("480P");String superP = jsonObjectDefination.getString("720P");playurl = new MoviedefinitionBean(normalP, hightP, superP);

今天先寫到這裡|10-02-2014.