日期:2014-05-17  浏览次数:20781 次

整合ssh使用hibernateTemplate的find方法报空指针
这是entity类
Java code

package com.tjw.mysql.model;
import javax.annotation.Generated;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

import org.springframework.stereotype.Component;

@Component("admin")
@Entity
public class Admin {
    private int id ;
    private String name ;
    private String password ;
    private int grade ;
    
    
    @Id

    public int getId() {
        return id;
    }
    
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getGrade() {
        return grade;
    }
    public void setGrade(int grade) {
        this.grade = grade;
    }
}




这是实现类
Java code

package com.tjw.mysql.dao.impl;

import java.io.Serializable;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.annotation.Resource;
import javax.jms.Session;

import org.hibernate.Query;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.stereotype.Component;


import com.tjw.mysql.dao.AdminDAO;
import com.tjw.mysql.model.Admin;



@Component("adminDAO")
public class AdminImpl implements AdminDAO{
    private HibernateTemplate hibernateTemplate; 
    public void doCreate(Admin admin)  {
        // TODO Auto-generated method stub
        hibernateTemplate.save(admin);
    }

    public boolean doCreateOrdoUpdate(Admin admin) {
        // TODO Auto-generated method stub
        return false;
    }

    public void doDelete(Admin admin)  {
        
        this.hibernateTemplate.delete(admin);

    }

    public void doUpdate(Admin admin) {
        // TODO Auto-generated method stub
        this.hibernateTemplate.update(admin);
    }

    public List<Admin> findAll(){
        // TODO Auto-generated method stub
         

        List<Admin> list = (List<Admin>)this. hibernateTemplate.find("from Admin");
        return list ; 
    }

    public Admin findById(int id) {
        // TODO Auto-generated method stub
        return null;
    }

    public int getCount() {
        // TODO Auto-generated method stub
        return 0;
    }

    public HibernateTemplate getHibernateTemplate() {
        return hibernateTemplate;
    }
    @Resource
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }

}



这是配置文件
Java code

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/a