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HQL statement In Hibernate, although simple primary key query statements can be generated directly by Hibernate using the API, complex query statements need our own handwriting. Hibernate provides us with an HQL statement to use. HQL is the abbreviation of Hibernate Query Language, HQL is a statement close to SQL, b ...

The most important thing in HTTPS is SSL handshake. SSL handshake is used to negotiate the secret key and encryption suite. The overall process is as follows: The client tells the server to use HTTPS protocol; The server returns its certificate and public key to the client; Client verifies the validity of public key and certificate; After pass ...

Related information/Official website address 1. Install sqlalchemy and check the version Execute the following statement under the command line to install: pip install SQLAlchemy View version after installation: import sqlalchemy print(sqlalchemy.__version__) In addition, PyMySQL needs to be installed, otherwise an error of modulenotfounderr ...

The following exception indicates that the encryption algorithm does not meet the key size.   Find the reasons from the Internet as follows, which may be the following. This kind of error may be reported if the versions of both sides of the jdk are inconsistent. But in fact, I use the same local jdk as 1.8-u191. Take a closer look, the th ...

scene It is applicable to the company with front-end, and the project adopts front-end separation. Similar to the interface provided by our back-end springboot, the front-end specially writes html to call the corresponding interface to solve cross domain problems. Configuration description worker_processes 1; events { worker_connectio ...

HQL is the abbreviation of Hibernate Query Language, which provides more flexible and powerful query capabilities; HQL is closer to SQL query syntax. query Query all (persistent data) // s: aliases must be aliased to objects, not *. Not in hibernate* String hql="select s from Student s"; //The Que ...

Vulnerability Name: CNVD-2018-01221 Influence: Dedecms v5.7 sp2 Harm: Arbitrary code execution, getshell; preparation: win7 virtual machine + Dedecms v5.7 sp2+phpstudy First install Dedecms v5.7 sp2: http://www.dedecms.com After downloading and installing, directly visit localhost/Dedecms v5.7 sp2/upl ...

Catalog One with jsp Two parameter binding Common types Default supported parameter types Simple data type binding Request garbled processing Custom Converter Three methods return value Return to ModelAndView Return to void Return string Reference resources One with jsp You can return String ...

Background 1. In recent projects, we need to replace the verification code with kaptch and springboot, which is also convenient to operate. We have made many detours, and specially wrote down this method for your reference. Let's explain it next. II. Project structure III. detailed configuration ...

Principle analysis of successful and failed spring security authentication processor First of all, we need to know that the default success and failure processors of spring security are SavedRequestAwareAuthenticationSuccessHandler and simpleurauthenticationfailurehandler. Normally, when requesting a ...