我是 hadoop 的初学者，我被告知要创建一个自定义 inputformat 类来读取 json 数据，我已经用谷歌搜索并学习了如何创建一个自定义 inputformat 类来从文件中读取数据。但是我一直在解析 json数据。我的 json 数据看起来像这样
[
{
"_count": 30,
"_start": 0,
"_total": 180,
"values": [
{
"attachment": {
"contentDomain": "techcarnival2013.eventbrite.com",
"contentUrl": "http://techcarnival2013.eventbrite.com/",
"imageUrl": "http://ebmedia.eventbrite.com/s3-s3/static/images/django/logos/eb_home_tm-trans-fb.png",
"summary": "Get to know a few thousand of Silicon Valley's best and brightest while enjoying unparalleled access to Candlestick Park,\u00a0games, food, music and more. We'll have carnival games you haven't played since you were ten, giant inflatable obstacle...",
"title": "Tech Carnival @ Candlestick Park"
},
"comments": {
"_total": 0
},
"creationTimestamp": 1373908436000,
"creator": {
"firstName": "Clayton",
"headline": "Director of Operations",
"secondname":{
"name":"myname"
},
"lastName": "K.",
"pictureUrl": "http://m.c.lnkd.licdn.com/mpr/mprx/0_R7Vm6_RqBDHaHCDzJHRA6hsNcwOfECjzMeaA6heqHeo0v6ovBWoCe8pVJiYrd5pJVu4KdbnQQ3Lj"
},
"likes": {
"_total": 0
},
"relationToViewer": {
"availableActions": {
"_total": 7,
"values": [
{
"code": "add-comment"
},
{
"code": "categorize-as-job"
},
{
"code": "categorize-as-promotion"
},
{
"code": "flag-as-inappropriate"
},
{
"code": "follow"
},
{
"code": "like"
},
{
"code": "reply-privately"
}
]
},
"isFollowing": false,
"isLiked": false
},
"summary": "Network with 4,000+ from the tech community, including folks from DFJ, Google, LinkedIn, Square, Uber, Y Combinator, 500 Startups, etc. $10 ticket gets you all-you-can-ride access to the pop-up Tech Carnival, will be the biggest Wednesday night of the tech summer.",
"title": "Tech Event @ Candlestick Park on Wednesday, July 17th! Come play carnival games with ~4,000 of the Bay area's best and brightest!"
},
{
"attachment": {
"contentDomain": "lifebeyondnumbers.com",
"contentUrl": "http://bit.ly/10VTqMu",
"imageUrl": "http://lifebeyondnumbers.com/wp-content/uploads/2013/07/lurnq_Online_Courses.jpg",
"summary": "LurnQ offers a platform for learning and teaching that is free for everyone. It caters to a diverse online audience and is relevant to everyone in general. The key segment that we address now is of life long learners.",
"title": "LurnQ - making lifelong learning clutter free, fun and a social..."
},
"comments": {
"_total": 0
},
"creationTimestamp": 1373883177000,
"creator": {
"firstName": "Syed",
"headline": "Founder and CEO at QubiqSquare",
"lastName": "Muksit",
"pictureUrl": "http://m.c.lnkd.licdn.com/mpr/mprx/0_Y5gdzlRCbQBTqIa-pXYnz-01b6KinDO-pFWnz-ZCZLk1WWdt-_SLUt2uWmrpzo0OxQxcVv6pRjbE"
},
"likes": {
"_total": 0
},
"relationToViewer": {
"availableActions": {
"_total": 7,
"values": [
{
"code": "add-comment"
},
{
"code": "categorize-as-job"
},
{
"code": "categorize-as-promotion"
},
{
"code": "flag-as-inappropriate"
},
{
"code": "follow"
},
{
"code": "like"
},
{
"code": "reply-privately"
}
]
},
"isFollowing": false,
"isLiked": false
},
"summary": "LurnQ offers a platform for learning and teaching that is free for everyone. It caters to a diverse online audience and is relevant to everyone in general. The key segment that we address now is of life long learners.",
"title": "There is so much to learn and most of the times, we don\u2019t even know that this-and-that good stuff exists. http://bit.ly/10VTqMu"
},
{
"attachment": {
"contentDomain": "techcarnival2013.eventbrite.com",
"contentUrl": "http://techcarnival2013.eventbrite.com/",
"imageUrl": "http://ebmedia.eventbrite.com/s3-s3/static/images/django/logos/eb_home_tm-trans-fb.png",
"summary": "Get to know a few thousand of Silicon Valley's best and brightest while enjoying unparalleled access to Candlestick Park,\u00a0games, food, music and more. We'll have carnival games you haven't played since you were ten, giant inflatable obstacle...",
"title": "Tech Carnival @ Candlestick Park"
},
"comments": {
"_total": 0
},
"creationTimestamp": 1373654758000,
"creator": {
"firstName": "Clayton",
"headline": "Director of Operations",
"lastName": "K.",
"pictureUrl": "http://m.c.lnkd.licdn.com/mpr/mprx/0_R7Vm6_RqBDHaHCDzJHRA6hsNcwOfECjzMeaA6heqHeo0v6ovBWoCe8pVJiYrd5pJVu4KdbnQQ3Lj"
},
"likes": {
"_total": 0
},
"relationToViewer": {
"availableActions": {
"_total": 7,
"values": [
{
"code": "add-comment"
},
{
"code": "categorize-as-job"
},
{
"code": "categorize-as-promotion"
},
{
"code": "flag-as-inappropriate"
},
{
"code": "follow"
},
{
"code": "like"
},
{
"code": "reply-privately"
}
]
},
"isFollowing": false,
"isLiked": false
},
"summary": "Network with 4,000+ from the tech community, including folks from DFJ, Google, LinkedIn, Square, Uber, Y Combinator, 500 Startups, etc. $10 ticket gets you all-you-can-ride access to the pop-up Tech Carnival, will be the biggest Wednesday night of the tech summer.",
"title": "Tech Event @ Candlestick Park on Wednesday, July 17th! Come play carnival games with ~4,000 of the Bay area's best and brightest!"
}
..........
........ so on
]
所以我很困惑如何在我的自定义输入格式类中读取 json 对象。关于如何解析这个的任何想法？我想读取 json 数组中的单个 json 对象，我的意思是读取正确的 json 字符串，然后将字符串提供给映射我将在映射中使用 json 解析器来构造我自己的键值对。对此有任何帮助吗？提前致谢