在Spring中基于条件语句呈现视图

我对春天有点陌生。我试图使用

processController

中的条件if语句，根据

dbdao实现

类返回的值呈现视图。对于成功场景，我尝试返回

successuseraddstatus

jsp文件；对于失败场景，我尝试返回

faileduseraddstatus

jsp文件

ProcessController.java：

@RequestMapping(value = "/adduserstatus", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("SpringWeb")Process process,ModelMap model) {

    model.addAttribute("fname", process.getFname());
    model.addAttribute("lname", process.getLname());
    model.addAttribute("email", process.getEmail());
    model.addAttribute("phone", process.getPhone());

    ApplicationContext context = 
         new ClassPathXmlApplicationContext("Beans.xml");

    DBDAOImp dbd = 
         (DBDAOImp)context.getBean("JDBCTemplate");

    dbd.createuser(process.getFname(), process.getLname(), process.getEmail(), process.getPhone());

    if (true){ //This is where I am having trouble
        return "successuseraddstatus";
    } 
    return "faileduseraddstatus";
}

@RequestMapping(value = "/adduserstatus", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("SpringWeb")Process process,ModelMap model) {
    model.addAttribute("fname", process.getFname());
    model.addAttribute("lname", process.getLname());
    model.addAttribute("email", process.getEmail());
    model.addAttribute("phone", process.getPhone());

     DBDAOImp dbd = 
         (DBDAOImp)context.getBean("JDBCTemplate");


     if (dbd.createuser(process.getFname(), process.getLname(), process.getEmail(), process.getPhone())){
      return "useraddstatus";
      } else {
          return "faileduseraddstatus";
      }
}

DBDAOImplementation.java：

@Override
public Boolean createuser(String fname, String lname, String email, String phone) {

    isExists(email);

    if (isExists==false){

        String SQL = "insert into USERS (user_id,f_name,l_name,creation_date,email,phone) values (seq_users.nextval,?,?,sysdate,?,?)";

        jdbcTemplateObject.update( SQL, fname,lname,email,phone);
        System.out.println("Created Record");
        return true;
    } else {
        return false;
    }
}

---

如果条件有效，请按以下步骤操作。但我不太确定这是否正确

ProcessController.java：

@RequestMapping(value = "/adduserstatus", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("SpringWeb")Process process,ModelMap model) {

    model.addAttribute("fname", process.getFname());
    model.addAttribute("lname", process.getLname());
    model.addAttribute("email", process.getEmail());
    model.addAttribute("phone", process.getPhone());

    ApplicationContext context = 
         new ClassPathXmlApplicationContext("Beans.xml");

    DBDAOImp dbd = 
         (DBDAOImp)context.getBean("JDBCTemplate");

    dbd.createuser(process.getFname(), process.getLname(), process.getEmail(), process.getPhone());

    if (true){ //This is where I am having trouble
        return "successuseraddstatus";
    } 
    return "faileduseraddstatus";
}

@RequestMapping(value = "/adduserstatus", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("SpringWeb")Process process,ModelMap model) {
    model.addAttribute("fname", process.getFname());
    model.addAttribute("lname", process.getLname());
    model.addAttribute("email", process.getEmail());
    model.addAttribute("phone", process.getPhone());

     DBDAOImp dbd = 
         (DBDAOImp)context.getBean("JDBCTemplate");


     if (dbd.createuser(process.getFname(), process.getLname(), process.getEmail(), process.getPhone())){
      return "useraddstatus";
      } else {
          return "faileduseraddstatus";
      }
}

---

什么麻烦？这应该可以正常工作。在这种情况下有什么错误或问题？为什么要在每个请求上创建一个新的

ApplicationContext

？@Martin-我在每个请求上删除了ApplicationContext@Balwinder-当我尝试使用上述代码时，我得到了else条件的死代码。如果条件有效，请按以下步骤操作。