stropersbean.java

想学习EJB的同学

/*
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 * and open the template in the editor.
 */

package ejb3.day1;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;

/**
 *
 * @author user
 */
@Stateless(mappedName="ejb/strOpers")
public class StrOpersBean implements StrOpersRemote {
    public StrOpersBean(){
        System.out.println("in constructor StrOpersBean");
    }
    
    public String reverse(String inStr) {
        System.out.println("StrOpersBean: reverse");
        if(inStr == null || inStr.trim().length() <= 1) return inStr;
        return new StringBuilder(inStr).reverse().toString();
    }
    
    public String ulConvert(String inStr) {
        System.out.println("StrOpersBean: ulConvert");
        if(inStr == null || inStr.trim().length() == 0) return inStr;
        StringBuilder sb = new StringBuilder();
        int len = inStr.length();
        int diff = 'a' - 'A';
        for(int i = 0; i < len; i++){
            char c = inStr.charAt(i);
            if(c >= 'a' && c <= 'z') c -= diff;
            else if(c >= 'A' && c <= 'Z') c += diff;
            sb.append(c);
        }
        return sb.toString();
    }
    
    @Resource
    public void setSessionContext(SessionContext sctx){
        System.out.println("StrOpersBean: dependency injection.");
    }

    @PostConstruct
    public void constructed(){
        System.out.println("StrOpersBean constructed");
    }
    
    @PreDestroy
    public void destroy(){
        System.out.println("StrOpersBean will be destroyed");
    }
    // Add business logic below. (Right-click in editor and choose
    // "EJB Methods > Add Business Method" or "Web Service > Add Operation")
 
}