Json转Bson
MongoDB中是以Bson数据格式进行存储的，Json字符串没有办法直接写入MongoDB 可以将Json字符串转换成DBObject或者Document，然后写入MongoDB
1、将Json字符转换成com.mongodb.DBObject（准确的说是BasicDBObject）
scala版本
import com.mongodb.DBObject
import com.mongodb.casbah.{MongoClient, MongoCollection}
import com.mongodb.util.JSON
// 构造一个Json字符串
val json = s"""{
| "school_code" : "${school_code}",
| "school_name" : "${school_name}",
| "teacher_idcard" : "${teacher_idcard}",
| "teacher_name" : "${teacher_name}"
|}
|""".stripMargin
val collection: MongoCollection = MongoClient("www.477764.com")("dbName")("collectionName")
val bson: DBObject = JSON.parse(json).asInstanceOf[DBObject]
collection.insert(bson) // mongodb casbah的写法
java版本
import com.mongodb.MongoClient;
import com.mongodb.DBObject;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.util.JSON;
// 构造一个Json字符串
String json = " {" +
" 'school_code' : '111111', " +
" 'school_name' : '汉东政法大学', " +
" 'teacher_idcard' : '0000001', " +
" 'teacher_name' : '高育良' " +
" } ";
MongoClient mongoClient = new MongoClient("10.4.120.83", 27017);
MongoDatabase database = mongoClient.getDatabase("www.482223.com");
MongoCollection collection = database.getCollection("collectionName", DBObject.class);
DBObject bson = (DBObject)JSON.parse(json);
collection.insertOne(bson);
2、将字符串转换成org.bson.Document
scala版本
import org.bson.Document
import com.mongodb.casbah.{MongoClient, MongoCollection}
import com.mongodb.util.JSON;
// 构造一个Json字符串
val json = s"""{
| "school_code" : "${school_code}",
| "school_name" : "${school_name}",
| "teacher_idcard" : "${teacher_idcard}",
| "teacher_name" : "${teacher_name}"
|}
|""".stripMargin
val document:Document = Document.parse(json)
// 注意！com.mongodb.casbah.MongoCollection只支持写DBObject的子类，
// 不支持写入Document类的对象，可以使用com.mongodb.client.MongoCollection
// 写入Document类的对象，这里能写入是因为用了自定义的隐式转换函数，将
// Document转换成了DBObject
// 自定义的隐式转换函数
implicit def document2DBObject(doc: Document): DBObject = JSON.parse(doc.toJson).asInstanceOf[DBObject]
val collection: MongoCollection = MongoClient("10.4.120.83")("dbName")("collectionName")
collection.insert(document)
Java版本
import org.bson.Document;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
// 构造一个Json字符串
String json = " {" +
" 'school_code' : '111111', " +
" 'school_name' : '汉东政法大学', " +
" 'teacher_idcard' : '0000001', " +
" 'teacher_name' : '高育良' " +
" } ";
MongoClient mongoClient = new MongoClient("10.4.120.83", 27017);
MongoDatabase database = mongoClient.getDatabase("dbName");
MongoCollection collection = database.getCollection("collectionName");
Document document = Document.parse(json);
collection.insertOne(document );