JDBCUtil | 玩转JDBC打造数据库操作万能工具类JDBCUtil,加入了高效的数据库连接池,利用了参数绑定有效防止SQL注入

 by   linglongxin24 Java Version: Current License: No License

kandi X-RAY | JDBCUtil Summary

kandi X-RAY | JDBCUtil Summary

JDBCUtil is a Java library. JDBCUtil has no bugs, it has no vulnerabilities and it has low support. However JDBCUtil build file is not available. You can download it from GitHub.


            kandi-support Support

              JDBCUtil has a low active ecosystem.
              It has 111 star(s) with 62 fork(s). There are 8 watchers for this library.
              It had no major release in the last 6 months.
              There are 1 open issues and 0 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of JDBCUtil is current.

            kandi-Quality Quality

              JDBCUtil has 0 bugs and 0 code smells.

            kandi-Security Security

              JDBCUtil has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              JDBCUtil code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              JDBCUtil does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              JDBCUtil releases are not available. You will need to build from source code and install.
              JDBCUtil has no build file. You will be need to create the build yourself to build the component from source.
              Installation instructions are not available. Examples and code snippets are available.
              JDBCUtil saves you 233 person hours of effort in developing the same functionality from scratch.
              It has 569 lines of code, 31 functions and 4 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed JDBCUtil and discovered the below as its top functions. This is intended to give you an instant insight into JDBCUtil implemented functionality, and help decide if they suit your requirements.
            • Delete table
            • Execute update
            • Return SQL string after binding arguments
            • Get the DB connection pool
            • Get connection
            • Insert all values into table
            • Command line
            • Update table
            • Insert map
            • Cleanup resources
            Get all kandi verified functions for this library.

            JDBCUtil Key Features

            No Key Features are available at this moment for JDBCUtil.

            JDBCUtil Examples and Code Snippets

            No Code Snippets are available at this moment for JDBCUtil.

            Community Discussions


            SoapUI: 5.6.0 java.lang.ClassNotFoundException: PostgreSQL/org.postgresql.Driver when running tests using maven
            Asked 2021-Jun-07 at 07:35

            I'm trying to run SoapUI tests by using mvn commands, and I keep seeing this exception in every JDBC request, although the tests pass and the database is accessed."

            The dependency for PostgreSQL is added in maven.




            Answered 2021-Jun-07 at 07:35

            I Java a JDBC driver can be loaded automatically from classpath, that is why it still works.

            I think there is a line in your Groovy teardown script that looks like this:

            Source https://stackoverflow.com/questions/67773797


            Docker Compose Unable to obtain connection from database (jdbc:postgresql://db:5432/postgres) for user 'postgres': The connection attempt failed
            Asked 2021-May-27 at 07:51

            The Problem:

            I am using Docker Compose to create two containers: One with a Postgres database on it and the other with Flyway on it. The goal is to use Flyway to migrate scripts to the Postgres database instance. When I run docker-compose up I get the following error:

            Unable to obtain connection from database (jdbc:postgresql://db:5432/) for user 'luke_skywalker': The connection attempt failed.

            My code is below and thank you for your help!

            Here is my docker-compose.yml:



            Answered 2021-May-27 at 07:51

            As the exception message says:

            Source https://stackoverflow.com/questions/67715342


            spark write dataframe with hashMap to postgres as json
            Asked 2021-May-19 at 16:06

            I am working with 2.2.1 I would like to write a dataframe that has a map field into postgres as json field.

            Example code:



            Answered 2021-May-19 at 16:06

            Convert HashMap data into json string something like below.

            Source https://stackoverflow.com/questions/67601685


            Quarkus Maven Plugin not building anymore
            Asked 2021-May-11 at 10:46

            For some reason the backend of our Application does not build correctly:

            Error message

            While using mvn clean install still works mvn compile quarkus:dev -pl web does not, throwing the following error message during the build of quarkus-maven-plugin:1.11.3.Final:dev:



            Answered 2021-May-11 at 10:46

            We had similar issues in the Quarkus CI and the fix was to update the MySQL container as the version used was too old and used ciphers that were not supported anymore by the JDK.

            No common ciphers between the JDK and the MySQL instance can be found so things are not working properly.

            Could you try to use a more recent version of the MySQL (or MariaDB) image? Typically the default one from Testcontainers is too old.

            Source https://stackoverflow.com/questions/67483606


            CREATE USER and CREATE ROLE as PreparedStatement with ? placeholder
            Asked 2021-Apr-12 at 17:58

            I am trying to issue a CREATE USER statement against a HSQLDB database from Java code in a way that allows the use of parameters.

            However, the following line:



            Answered 2021-Apr-12 at 17:58

            In general, databases only allow parameters in DML, not in DDL. And in DML, it is only allowed for values. In the case of CREATE USER and CREATE ROLE, you aren't dealing with values (at least not for the user or role name), so parameterization is not possible for those. This is similar to not allowing parameters for the table name or column name in a select statement.

            In theory, something like the password in CREATE PASSWORD is a value and could be parameterized, but in practice this isn't possible (at least, not that I'm aware of), as all DDL is handled as non-parameterizable.

            As a minor form of protection against SQL injection, since JDBC 4.3 (introduced in Java 9), you can use Statement.enquoteIdentifier to quote identifiers, and Statement.enquoteLiteral for literals like passwords. These methods have a default implementation, but if you're using a platform with non-standard identifier quotes (e.g. like MySQL), then you must make sure it is actually overridden (which isn't the case in current versions of MySQL Connector/J AFAIK).

            Source https://stackoverflow.com/questions/67047078


            SpringBoot user lacks privilege or object not found HSQLDB
            Asked 2021-Feb-20 at 12:19

            I've created an app with views for 3 entites bank client and credit using Spring Boot and Vaadin. Credit entity is similar to client.



            Answered 2021-Feb-20 at 11:14

            The first line of the stack trace is

            org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.vaadin.tutorial.crm.ui.views.ClientListView': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.vaadin.tutorial.crm.ui.views.ClientListView]: Constructor threw exception; nested exception is org.springframework.dao.InvalidDataAccessResourceUsageException: could not prepare statement; SQL [select bank0_.id as id1_0_, bank0_.Name as name2_0_ from BANK bank0_]; nested exception is org.hibernate.exception.SQLGrammarException: could not prepare statement`

            What happens if you run this against your database outside of spring (i.e. directly from a db client)?

            Source https://stackoverflow.com/questions/66289626


            Flyway version 7.5.1 and up can not initialize Zonky-test DB
            Asked 2021-Feb-11 at 11:50

            With Flyway version 7.5.0, it still works fine. Version 7.5.1 and 7.5.2 however, produce the following error:



            Answered 2021-Feb-11 at 11:50

            Flyway had some breaking changes between version 7.5.0 and 7.5.1. The maintainer of zonkyio/embedded-database-spring-test just implemented a fix/workaround in his library, which is included in version 1.6.3. :-)

            Source https://stackoverflow.com/questions/66023759


            Unable to fetch data from Presto SQL (Trino) using pySpark
            Asked 2021-Jan-29 at 03:16

            I have a pyspark job that I run on AWS Glue. The code is running fine when I run it through my local Machine. But when I try to run the same code from AWS Glue I am not able to fetch data. Below is my code and error message. From the output you will notice that I am able to get schema information. Error happens as soon as I try to get the data.

            Update : The issue is happening as the worker node are not able to access the Keystore present in the Master node. Can someone help how to copy the file to child node or how to make the file accessible to the child nodes?



            Answered 2021-Jan-29 at 03:16

            I was able to solve this issue by passing the certificate location as job parameter --extra-files and referring in the code as below:

            Source https://stackoverflow.com/questions/65512483


            Spark worker nodes unable to access file on master node
            Asked 2021-Jan-14 at 19:28

            I am trying to connect to Presto DB through my Spark Scala code and running it on an EMR Cluster. I am able to create the RDD but when the worker nodes are trying to fetch the data the code fails saying the file not found (keystore not exists) though it is present in the master node. Is there a way I can copy the Keystore file to child nodes? Below is my code and steps I am following

            First step I copy the certificate to tmp folder using below command



            Answered 2021-Jan-14 at 19:28

            Spark on EMR create the driver in one of of the CORE node (by default) not on master code.

            A driver (On CORE node) can't access files in master node.

            So what option do you have -

            1. While spinning up EMR cluster write a bootstrap script to copy the rootca_ca.jks file (s3 cp) to every worker (CORE & TASK) node and you don't to change anything in the program
            2. As you are using s3-dist-cp to copy the file, it puts your file in HDFS not in linux file system.
              To access the file you need to add file system perfix. hdfs:///tmp/rootca_ca.jks.
              You don't need to put name-node address & port because its configures by EMR in core-site.xml
            3. As your files are already in S3, you can use EMRFS (which is nothing but S3 as a hadoop file system). To access a file using EMRFS just put S3 url s3://test/rootca_ca.jks.
              But make sure your EC2 EMR IAM role has access to get the object from S3
              Also it comes with its own cost but as you file is small you can leverage this
            • Option 1: is very hard to maintain over time, if your file needs to be changed on running cluster you will have to do it manually on every worker node.

            • Option 2: as HDFS is shared file system, you can need to maintain the file in one place.

            • Option 3: there is not much difference as option 2, just that your file stays and read from S3. You don't have to copy the file in HDFS.

            Source https://stackoverflow.com/questions/65713156


            org.hsqldb.HsqlException: discrepancy in the number of rows counted
            Asked 2020-Dec-26 at 12:20

            Merry Christmas to everyone.

            I'm trying to play around with an insecure application (Insecure Bank) and I'm trying to port it to secure it a bit more as a personal project.

            I have a problem inserting the contents of the database into a database in memory. There are this two tables:



            Answered 2020-Dec-24 at 23:12

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install JDBCUtil

            You can download it from GitHub.
            You can use JDBCUtil like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the JDBCUtil component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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