カスタムタグ:JSPページでSpring Beanを動的に実行する方法

public class ServiceTag extends BaseBodyTagSupport {
	private String beanName;
	private String methodName;
	private String id;
	public List params = new ArrayList();
	
	public void setBeanName(String beanName) {
		this.beanName = beanName;
	}
	
	public void setMethodName(String methodName) {
		this.methodName = methodName;
	}

	public void setId(String id) {
		this.id = id;
	}
	
	public int doEndTag() throws JspException {		
		Object bean = null;
		Method method = null;
		
		//  bean  
		try{
			bean = SpringContextUtil.getBean(beanName);
		}catch(Exception ex){
			throw new JspException("get bean error: " + beanName);
		}
		
		//        
		if(bean != null){
			try {
				method = bean.getClass().getMethod(methodName, TagUtil.getParameterTypes(params));
			}catch(Exception e) {
				throw new JspException("get method error: " + beanName + "." + methodName);
			}
		}else{
			throw new JspException("ServiceTag Error: bean [" + beanName + "] is null");
		}
		
		//        ，    
		Object result = null;
		if(method != null){
			try {
				result = method.invoke(bean, TagUtil.getParameterValues(params));
			}catch(Exception e){
				throw new JspException("method invoke error");
			}
		}
		
		//      ValueStack 
		ValueStack vs = TagUtils.getStack(pageContext);
		vs.getContext().put(id, result);
		
		return EVAL_PAGE;
	}
}

public class ServiceParamTag extends BaseBodyTagSupport {
	private String name;
	private Object value;
	private String type;
	
	public void setName(String name) {
		this.name = name;
	}

	public void setValue(Object value) {
		this.value = value;
	}

	public void setType(String type) {
		this.type = type;
	}

	public int doEndTag() throws JspException {
		Tag parent = getParent();
		if(parent instanceof ServiceTag){
			Map p = new HashMap();
			p.put("paramName", name);
			p.put("paramValue", value);
			p.put("paramType", type);
			((ServiceTag)parent).params.add(p);
		}
		
		return EVAL_PAGE;
	}
}

//      
public static Class[] getParameterTypes(List params) throws Exception{
	Class[] c = new Class[params.size()];
	
	for(int i=0;i

	serviceBean
	com.cjm.web.taglib.ServiceTag
	JSP
	
		beanName
		true
		true
	
	
		methodName
		true
		true
	
	
		id
		true
		true
	



	serviceParam
	com.cjm.web.taglib.ServiceParamTag
	JSP
	
		name
		true
		true
	
	
		value
		true
		true
	
	
		type
		true
		true
	

public class RoleService extends BaseService {
	private RoleDao roleDao;
	
	public RoleDao getRoleDao() {
		return roleDao;
	}

	public void setRoleDao(RoleDao roleDao) {
		this.roleDao = roleDao;
	}

	public Role getRole(String roleId){
		return (Role)get(Role.class, roleId);
	}
}