动态注入要求

  1. 能被Spring扫描到主类
  2. 能被Spring扫描到注入的类

注入的三种形式

被注入的类

package lihan.properties;import org.springframework.stereotype.Component;// 增加注解能够被Spring 扫到@Component public class ConfigProperties { private String aaa = "aaa"; private String bbb = "bbb"; private String ccc = "ccc"; private String ddd = "ddd"; private String eee = "eee"; public String getAaa() {        return aaa; }    public void setAaa(String aaa) {        this.aaa = aaa; }    public String getBbb() {        return bbb; }    public void setBbb(String bbb) {        this.bbb = bbb; }    public String getCcc() {        return ccc; }    public void setCcc(String ccc) {        this.ccc = ccc; }    public String getDdd() {        return ddd; }    public void setDdd(String ddd) {        this.ddd = ddd; }    public String getEee() {        return eee; }    public void setEee(String eee) {        this.eee = eee; }}

1. 应用结构器注入

@Componentpublic class StuStaticConfig {    private static ConfigProperties configProperties;        public StuStaticConfig(ConfigProperties configProperties) {        this.configProperties = configProperties;    }    }

2. set注入

set不能为static静态方法

@Componentpublic class StuStaticConfig {    private static ConfigProperties configProperties;        @Autowired    public void setConfigProperties(ConfigProperties configProperties) {        StuStaticConfig.configProperties = configProperties;    } }

3. @PostConstruct 注入

@Componentpublic class StuStaticConfig {    private static ConfigProperties configProperties;        @Autowired    private ConfigProperties configPropertiesTemp;    @PostConstruct    public void init() {        this.configProperties = this.configPropertiesTemp;    }}

将注入的类，赋值给动态对象上