spring data mongodb 配置遇到的几个问题

一. mongodb 2.2版本以上的配置

spring.data.mongodb.uri = mongodb://newlook:newlook@192.168.0.109:27017/admin

2.2及以下版本的配置

#spring.data.mongodb.host = 192.168.0.109
#spring.data.mongodb.username = newlook
#spring.data.mongodb.password = newlook
#spring.data.mongodb.defaultDB = admin
#spring.data.mongodb.port = 27017

二. Configuration

@Bean
PlatformTransactionManager platformTransactionManager() {
return new org.springframework.integration.transaction.PseudoTransactionManager();
}

<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-core</artifactId>
</dependency>

开始注入了其他的类型的TransactionManager，导致maven中自动引入了jpa相关的依赖，报错如下：

Caused by: java.lang.IllegalStateException: Cannot load driver class: mongodb.jdbc.MongoDriver

原因：

You seem to be trying to mix JPA, which is primarily intended for relational datastores, with MongoDB, which is an "unrelated" document store. Drop the dependency on spring-boot-starter-data-jpa (you simply don't need it) and the spring.datasource.driver-class-name (you should use MongoDB natively, not via a JDBC bridge).

三.org.springframework.dao.OptimisticLockingFailureException: Optimistic lock exception on saving entity

原因：版本控制的类型须为包装类型，

将

@Version
private int version;

改为：

@Version
private Integer version;

四.数据保存时候id总是empty

原因：ui中id提交时为“”，

将

改为：

这样id提交后为null,可自动生成id

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