Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about how the p tag and c tag in Spring are injected. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Spring p and c tag injection mode 1. Write the entity class package com.ming04.pojo;import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor;@Data@AllArgsConstructor@NoArgsConstructorpublic class User {private int id; private String name;} 2. Configuration file (key) 3. Test @ Test public void Text () {ApplicationContext context = new ClassPathXmlApplicationContext ("Beans04.xml"); User user = (User) context.getBean ("user2"); System.out.println (user);} spring Bean injection and P tag using 1. Construction method parameters

Corresponding profile element

Can index | name | type one or three choose two; ref | value choose one of the two

2.setter method injection (recommended for development)

Provides a setter method for injecting attributes

Configure each injection attribute, corresponding to the element

3.p use of namespaces

After spring2.5, in order to simplify setter method attribute injection and refer to the concept of p namespace, child elements can be simplified to element attribute configuration!

a.

Introduce p namespace in applicationContext.xml

b. Simplify the configuration of injection

4. Property injection of collection type (understand)

Spring provides individual elements for each commonly used collection object to complete injection

List object-element

Set object-element

Map object-element

Properties object-element

The injection of collection properties is mainly used for the configuration of the framework!

This is how the p tag and c tag are injected into the Spring shared by the editor. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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