例如要注入下列引數：

dyn.spring.datasources[0].name=branchta
dyn.spring.datasources[0].driverClassName=oracle.jdbc.OracleDriver
dyn.spring.datasources[0].url=jdbc:oracle:thin:@IP:1521:ora11g
dyn.spring.datasources[0].username=scott
dyn.spring.datasources[0].password=tiger
dyn.spring.datasources[1].name=ta4
dyn.spring.datasources[1].driverClassName=oracle.jdbc.OracleDriver
dyn.spring.datasources[1].url=jdbc:oracle:thin:@IP:1521:ora11g
dyn.spring.datasources[1].username=hr
dyn.spring.datasources[1].password=hr

這樣，通過結合RootBeanDefinition以及DefaultListableBeanFactory相關介面，就可以純程式設計式動態建立bean，而無需修改xml或者配置bean，達到純動態的目的。

但是網上的例子似乎都是注入string型別的list，經測試，只要將datasources包含的型別定義為public即可，如下：

package com.XX.XXX.datasource;

import java.util.List;

import org.springframework.boot.context.properties.ConfigurationProperties;
 
import org.springframework.context.annotation.PropertySource;

@ConfigurationProperties(prefix="dyn.spring")
@PropertySource("classpath:jrescloud.properties")
public class DynamicDataSourceConfig {
    
    private List<DataSource> datasources;
    
    public static class DataSource {
        
 
private String name;
        private String driverClassName;
        private String url;
        private String username;
        private String password;
        private String maxActive;
        private String maxIdle;
        private String maxWait;
        private String validationQuery;
        private String defaultAutoCommit;
        private String connectionInitSqls;
        
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public String getDriverClassName() {
            return driverClassName;
        }
        public void setDriverClassName(String driverClassName) {
            this.driverClassName = driverClassName;
        }
        public String getUrl() {
            return url;
        }
        public void setUrl(String url) {
            this.url = url;
        }
        public String getUsername() {
            return username;
        }
        public void setUsername(String username) {
            this.username = username;
        }
        public String getPassword() {
            return password;
        }
        public void setPassword(String password) {
            this.password = password;
        }
        public String getMaxActive() {
            return maxActive;
        }
        public void setMaxActive(String maxActive) {
            this.maxActive = maxActive;
        }
        public String getMaxIdle() {
            return maxIdle;
        }
        public void setMaxIdle(String maxIdle) {
            this.maxIdle = maxIdle;
        }
        public String getMaxWait() {
            return maxWait;
        }
        public void setMaxWait(String maxWait) {
            this.maxWait = maxWait;
        }
        public String getValidationQuery() {
            return validationQuery;
        }
        public void setValidationQuery(String validationQuery) {
            this.validationQuery = validationQuery;
        }
        public String getDefaultAutoCommit() {
            return defaultAutoCommit;
        }
        public void setDefaultAutoCommit(String defaultAutoCommit) {
            this.defaultAutoCommit = defaultAutoCommit;
        }
        public String getConnectionInitSqls() {
            return connectionInitSqls;
        }
        public void setConnectionInitSqls(String connectionInitSqls) {
            this.connectionInitSqls = connectionInitSqls;
        }
    }

    public List<DataSource> getDatasources() {
        return datasources;
    }

    public void setDatasources(List<DataSource> datasources) {
        this.datasources = datasources;
    }
}

這樣就可以注入了。。。。。：）