Tag: inject

2023.11.7 Three major methods of Spring dependency injection

Table of Contents Foreword Property injection (@Autowired) Setter injection Constructor injection @Resource The difference between @Autowired and @Resource The difference between @Autowired and @Resource in finding Bean objects Foreword Profile ? <?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:content=”http://www.springframework.org/schema/context” xsi:schemaLocation=”http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/ context https://www.springframework.org/schema/context/spring-context.xsd”> <!–base-package indicates the path to be scanned–> <content:component-scan base-package=”com.java.demo”></content:component-scan> </beans> ? Startup […]

SQL injection: delayed injection of python universal script

SQL injection: delayed injection of python script import requests import binascii def judgment_delay(complete_url): headers={<!– –> “User-Agent”:”Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36″ } try: requests.get(url=complete_url,headers=headers,timeout=3) except requests.exceptions.ReadTimeout: return “time out” else: return “normal” def judgment_exploit(url): payload=” and sleep(6) #” complete_url=url + payload num=judgment_delay(complete_url) if “time out” in num: print(“[ + […]

Spring-dependency injection findAutowireCandidates source code implementation

findAutowireCandidates() implementation 1. Find the names of all beans of type type in the BeanFactory. Based on the BeanDefinition, you can determine whether they match the current type without generating a Bean object. 2. Find the object whose key is type in resolvableDependencies and add it to result. 3. Traverse the beanName found based on […]

Spring-dependency injection

How many dependency injection methods are there in Spring? Manual injection a) set mode injection <bean name=”userService” class=”com.gax.service.UserService”> <property name=”orderService” ref=”orderService”/> </bean> b) Constructor injection <bean name=”userService” class=”com.gax.service.UserService”> <constructor‐arg index=”0″ ref=”orderService”/> </bean> automatic injection a) XML autowire automatic injection b) Automatic injection of @Autowired annotation Attribute filling part source code: /** * Populate the bean […]

Spring-Spring dependency injection source code analysis (Part 1)

Dependency injection underlying principle flow chart:Dependency injection principle of Bean in Spring | ProcessOn free online drawing, online flow chart, online mind map How many dependency injection methods are there in Spring? First there are two types: Manual injection Automatic injection Manual injection When a Bean is defined in XML, it is injected manually, because […]

Solve the problem that springboot integrates websocket, redis, openfeign, redisTemplate, and openfeign classes that cannot be injected

In some businesses, we need to use long connections. We can use http long connections or websocket. In the framework of springboot as the backend, the technologies that can be borrowed are (netty, websocket) The version is as follows Software Version number jdk 21 springboot 3.1.5 springcloud 2022.0.4 Scene recurrence pom file <?xml version=”1.0″ encoding=”UTF-8″?> […]

SQL injection cases and principles

SQL injection cases and principles Foreword This time we will simply learn SQL injection cases and principles 1. What is SQL injection? SQL injection means that the web application does not judge the legality of the user input data or does not filter it strictly. The attacker can add additional SQL statements at the end […]

XSS injection analysis of WEB vulnerabilities

XSS injection vulnerability 1. Reflective XSS injection Cause of the vulnerability: There is no reliable input validation for user-submitted content (no filtering of sensitive strings). Next, write a web page with a reflected xss vulnerability a. Write xss vulnerability web page in php Code in xss.php <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <meta name=”viewport” […]

Why you should stop using field annotations in SpringBoot and use constructor injection instead

Stop using field injection in SpringBoot! This article is a translation, and I have added some of my own understanding. Translation source: https://medium.com In the context of Spring Boot dependency injection, there is a debate about best practices for injecting dependencies: field injection, setter injection, and constructor injection. ?In this article, we will focus on […]