SpringBoot整合axis1.4后，@Autowired注入失敗，使用工具類注入

問題描述：

費勁心思搭建好webservices服務端后，沒想到客戶端調用失敗，查看日志文件，發現報空指針異常，debug代碼后，發現sql查詢的值都是null。通常情況下，我們將Dao注入Service的時候使用@Autowired注解，但是這里顯然沒有注入進來。

解決方法：

使用SpringContextUtils工具類注入，首先增加SpringContextUtils.java文件，復制如下內容

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
 * @author xuchi
 * @Description: @Autowired注入無效，使用此工具類注入
 *
 */
@Component
public class SpringContextUtils implements ApplicationContextAware {
    private static ApplicationContext applicationContext = null;

    public SpringContextUtils() {
    }

    public void setApplicationContext(ApplicationContext arg0) throws BeansException {
        if (applicationContext == null) {
            applicationContext = arg0;
        }

    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public static void setAppCtx(ApplicationContext webAppCtx) {
        if (webAppCtx != null) {
            applicationContext = webAppCtx;
        }
    }

    /**
     * 拿到ApplicationContext對象實例后就可以手動獲取Bean的注入實例對象
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    public static <T> T getBean(String name, Class<T> clazz) throws ClassNotFoundException {
        return getApplicationContext().getBean(name, clazz);
    }

    public static final Object getBean(String beanName) {
        return getApplicationContext().getBean(beanName);
    }

    public static final Object getBean(String beanName, String className) throws ClassNotFoundException {
        Class clz = Class.forName(className);
        return getApplicationContext().getBean(beanName, clz.getClass());
    }

    public static boolean containsBean(String name) {
        return getApplicationContext().containsBean(name);
    }

    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return getApplicationContext().isSingleton(name);
    }

    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return getApplicationContext().getType(name);
    }

    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return getApplicationContext().getAliases(name);
    }
}

代替以往的

@Autowired
private ManagerDao managerDao;

而使用

ManagerDao managerDao = SpringContextUtils.getBean(ManagerDao.class);