Tag : Spring

Problem description Business requirements need to be based on a certain field value, assuming the value isdemo(This value is unique) to create a file nameddemoCollection of. After that, the document information related to demo (the structure is fixed) will be stored in this collection. The environmental background of the problem and what methods have you ..

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For the same query, using mongoTemplate will be much slower. using mongodb tool, the execution plan will be very fast, and the difference is very big. It seems that your two screenshots do not execute a query (at least the second screenshot has sort and the first Java code does not). Since this is not ..

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Why is mongoTemplate always null?springmvc mongo intellij idea macosThe error message is java.lang.NullPointerExceptionHello, great godsI’m building an APP backstage with itellij idea on MacOS. Now I need to integrate mongo. I’m having a problem. Is mongoTemplate always null every time a request is made to access the background interface?Some kind-hearted people please help me and ..

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After Mongodb connection times out, the first database query for reconnection will fail, and it is normal to connect again, which is always the case after each timeout. Just look at the problem description and don’t see anything, just post the key code directly. It is possible that mongo did not replace the old variable ..

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I am now making a small demo through spring-boot+spring-mongo, which is the latest version. Now there is a problem that I cannot connect to other libraries in any way, only mongodb’s default test library. What is the reason? Yml: spring.data.mongodb.uri: mongodb://localhost:27017/mongo In theory, this should be connected to the mongo library. My mongodb does not ..

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I want to use the spring-data-mongodb interface to perform batch insertion of 100 pieces of data at a time. The interface description is as follows: /** * reference: org.springframework.data.mongodb.core.mongotemplate * reference: org.springframework.data.mongodb.core.mongooses * * Insert a list of objects into the specified collection in a single batch write to the database. * * @param batchToSave ..

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Background: The project is managed using maven, and the following is the dependent jar tree structure: [INFO] xxx:groupon-boot:jar:1.0 [INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.2.0.RELEASE:compile [INFO] | +- org.springframework.boot:spring-boot-starter:jar:1.2.0.RELEASE:compile [INFO] | | +- org.springframework.boot:spring-boot:jar:1.2.0.RELEASE:compile [INFO] | | +- org.springframework.boot:spring-boot-autoconfigure:jar:1.2.0.RELEASE:compile [INFO] | | +- org.springframework.boot:spring-boot-starter-logging:jar:1.2.0.RELEASE:compile [INFO] | | | +- org.slf4j:jul-to-slf4j:jar:1.7.7:compile [INFO] | | | +- org.slf4j:log4j-over-slf4j:jar:1.7.7:compile [INFO] | | ..

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There is data that meets this condition in db. Query query=new Query( Criteria.where(“AAA”).is(XXobj.getAAA()). orOperator(Criteria.where(“BBB”).is(XXobj.getBBB())) ); Find () method: List<XXObject> result = mongoTemplate.find(query, XXObject.class); if(result! =null && ! result.isEmpty()){ return result.get(0); } FindOne () method: XXObject obj = mongoTemplate.findOne(query, XXObject.class); if(obj! =null){ return obj; } Question:Why are the results of these two queries different under the ..

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Hello, everyone, I have a small white front one. Recently, using jquery.datatables plug-in to enable the serverSide option found that his ajax parameters look like this in the browser inside. draw:1 columns[0][data]:name columns[0][name]: columns[0][searchable]:true columns[0][orderable]:true columns[0][search][value]: columns[0][search][regex]:false columns[1][data]:mobilePhone columns[1][name]: columns[1][searchable]:true columns[1][orderable]:true columns[1][search][value]: columns[1][search][regex]:false columns[2][data]:email columns[2][name]: columns[2][searchable]:true columns[2][orderable]:true columns[2][search][value]: columns[2][search][regex]:false columns[3][data]:registerDate columns[3][name]: columns[3][searchable]:true columns[3][orderable]:true columns[3][search][value]: columns[3][search][regex]:false ..

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