MongoDB整合Spring4.2.1的版本

本文链接： https://blog.csdn.net/lhh143400/article/details/100720149

参考链接：https://blog.csdn.net/ljqwstc/article/details/78399261

每个人遇到的问题可能会不一样，参考链接没有解决我的问题，但间接使我解决了问题。以下是我个人的配置信息

1.我使用的包：

spring-context-4.2.1.RELEASE.jar

bson-2.14.3.jar （用太高，我这会报错）

mongo-java-driver-2.14.3 .jar

spring-data-mongodb-1.7.2.RELEASE.jar （用太高，我这会报错）

2.xml 配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<mongo:mongo id="mongo" replica-set="${mongo.hostport}">

       <mongo:options connections-per-host="8"
           threads-allowed-to-block-for-connection-multiplier="4"
           connect-timeout="1000" max-wait-time="1500" auto-connect-retry="true"
           socket-keep-alive="true" socket-timeout="1500" slave-ok="true"
           write-number="1" write-timeout="0" write-fsync="true" />
   </mongo:mongo>

<mongo:db-factory username="${mongo.username}"
password="${mongo.password}" dbname="${mongo.dbname}" mongo-ref="mongo" />

   <mongo:mapping-converter id="converter" />

   <bean id="MongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
       <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
   </bean>

<bean id="gridFsTemplate" class="org.springframework.data.mongodb.gridfs.GridFsTemplate">
       <constructor-arg ref="mongoDbFactory" />
       <constructor-arg ref="converter" />
   </bean>

</beans>

3.properties 配置

mongo.hostport=127.0.0.1:27017
mongo.dbname=testdb
mongo.username=
mongo.password=

4.gridFsTemplate工具类

想用MongoTemplate ，gridFsTemplate 都可以，这边讲解 gridFsTemplate 使用

@Autowired
private GridFsTemplate gridFsTemplate;

   @Override
   public String save(InputStream inputStream, String fileName) {
       String fileId = null;
       try {
           String file = gridFsTemplate.store(inputStream, fileName).toString();
           Map obj=JSON.parseObject(file,Map.class);
           Map oid=JSON.parseObject(obj.get("_id").toString(),Map.class);
           fileId=String.valueOf( oid.get("$oid"));
       } catch (Exception e) {
e.printStackTrace();
       }
       return fileId;
   }

注意标红：这是包不一样，所以返回参数解析有所不同

遇到的问题

问题1：九月 11, 2019 12:01:39 上午 org.apache.catalina.core.StandardContext listenerStart
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongo': Cannot create inner bean '(inner bean)#470e90e0' of type [org.springframework.data.mongodb.core.MongoOptionsFactoryBean] while setting bean property 'mongoOptions'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#470e90e0': Instantiation of bean failed; nested exception is java.lang.IllegalAccessError: tried to access method org.bson.types.ObjectId.<init>(III)V from class com.mongodb.Bytes

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#470e90e0': Instantiation of bean failed; nested exception is java.lang.IllegalAccessError: tried to access method org.bson.types.ObjectId.<init>(III)V from class com.mongodb.Bytes

Caused by: java.lang.IllegalAccessError: tried to access method org.bson.types.ObjectId.<init>(III)V from class com.mongodb.Bytes
解决：

原本是
org.mongodb--bson--3.4.3版本

改为 org.mongodb--bson--2.14.3 版本

问题2：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'MongoTemplate' defined in class path resource [xml/mongodb.xml]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.mongodb.core.MongoTemplate]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/data/domain/ExampleMatcher$StringMatcher

解决方案
原本jar是: spring-data-mongodb-1.10.7.RELEASE.jar

改为：spring-data-mongodb-1.7.2.RELEASE.jar

MongoDB整合Spring4.2.1的版本

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