Spring源码解析系列文章（二）—— 怎么调试Spring代码

梦里梦外; 2023-06-20 06:11 172阅读 0赞

**目录**

1、疑问

2、创建maven工程

pom.xml 引入依赖

创建User实体类

创建Spring配置文件

创建Spring引导类

3、调试

打断点

进入断点

--------------------

# 1、疑问 #

[文章一][Link 1] 说了怎么导入Spring的源码，但是怎么调试呢？

我是通过创建项目，写Spring应用示例，在Spring 的jar包中打断点进行源码分析的。

# 2、创建maven工程 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70][]

## pom.xml 引入依赖 ##

<properties>
            
            
            
            <spring.version>5.0.6.RELEASE</spring.version>
        </properties>
    
        <dependencies>
    
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-indexer</artifactId>
                <version>${spring.version}</version>
                <optional>true</optional>
            </dependency>
    
        </dependencies>

## 创建User实体类 ##

public class User {
        private int id;
        private String name;
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        @Override
        public String toString() {
            return "User{" +
                    "id=" + id +
                    ", name='" + name + '\'' +
                    '}';
        }
    }

## 创建Spring配置文件 ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd">
    
        <bean id="user" class="thinking.in.spring.boot.samples.spring5.bean.User">
            <property name="name" value="zhangsan"/>
            <property name="id" value="1"/>
        </bean>
    </beans>

## 创建Spring引导类 ##

public class XmlBeanFactoryBootstrap {
    
        public static void main(String[] args) {
            DefaultListableBeanFactory defaultListableBeanFactory = new XmlBeanFactory(new ClassPathResource("application-context.xml"));
            User user = defaultListableBeanFactory.getBean(User.class);
            System.out.println(user);
        }
    }

# 3、调试 #

## 打断点 ##

![20200323103902772.png][]

如上图，我们点开 ClassPathResource 源码，并在里面打断点（下图）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 1][]

## 进入断点 ##

运行Spring引导类，进入断点（下图）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 2][]

就这样逐层进入调试，分析Spring源码

[Link 1]: https://blog.csdn.net/ruanhao1203/article/details/103442313
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200323103252539.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz,size_16,color_FFFFFF,t_70
[20200323103902772.png]: https://img-blog.csdnimg.cn/20200323103902772.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200323103954596.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz,size_16,color_FFFFFF,t_70
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