用easyjweb 生成了一个crud 项目，具体生成过程请参见
http://blog.8358.net/williamraym/entry/%E4%BD%BF%E7%94%A8maven%E5%BF%AB%E9%80%9F%E4%BD%93%E9%AA%8Ceasyjweb_spring2_jpa%E7%9A%84%E6%B7%BB%E5%88%A0%E6%94%B9%E6%9F%A5%E5%BA%94%E7%94%A8
http://blog.8358.net/williamraym/entry/使用Maven快速体验EasyJWeb+Spring2+JPA的添删改查应用
由于上文，建了一个可以持久化的应用，我现在要根据这个基础平台构建一个留言本程序。
上文中帮我生成了一个Account的CRUD示例，太方便了，都导致我不想手工编码了。
便是为了了解其内部构造，我还得来手工写一个Entry的代码，这个Entry为一个留言本的每一条留言
首先建立一个Entry 的Domain对象
com.easyjweb.demo.domain.Entry.java
内容为：
package com.easyjweb.demo.domain;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import com.easyjf.container.annonation.Field;
import com.easyjf.container.annonation.FormPO;
import com.easyjf.container.annonation.Validator;
@Entity
@FormPO(name = "留言", disInject = "id,serialVersionUID,inputTime,ip")
public class Entry implements java.io.Serializable {
private static final long serialVersionUID = 3665340848290050762L;
@Id
@javax.persistence.GeneratedValue(strategy = javax.persistence.GenerationType.TABLE)
private Long id;
@Column(length = 100)
@Field(name = "您的姓名", validator = @Validator(name = "string", value = "required;min:1;max:100"))
private String name;
@Column(length = 255)
@Field(name = "留言内容", validator = @Validator(name = "string", value = "required;min:1;max:255"))
private String content;
private Date inputTime;
private String ip;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public Date getInputTime() {
return inputTime;
}
public void setInputTime(Date inputTime) {
this.inputTime = inputTime;
}
public String getIp() {
return ip;
}
public void setIp(String ip) {
this.ip = ip;
}
}
建立一个Entry对象的DAO层对象
com.easyjweb.demo.dao.IEntryDAO.java
内容为：
package com.easyjweb.demo.dao;
import com.easyjf.core.dao.GenericDAO;
import com.easyjweb.demo.domain.Entry;
public interface IEntryDAO extends GenericDAO<Entry> {
}
只写了一个DAO的接口，继承了easyjweb的GenericDAO，这个基类里为我们封装好了常用的DAO操作，省得自已再去写了。
建立一个Entry对象的Service接口
com.easyjweb.demo.service.IentryService.java
此接口里定义几个常要操作的service接口
addEntry(Entry)
getEntry(Long)
removeEntry(Long)
batchRemoveEntries(List<Serializable>)
getEntryBy(IqueryObject)
updateEntry(Long,Entry)
内容为：
package com.easyjweb.demo.service;
import java.io.Serializable;
import java.util.List;
import com.easyjf.core.support.query.IQueryObject;
import com.easyjf.web.tools.IPageList;
import com.easyjweb.demo.domain.Entry;
public interface IEntryService {
public Long addEntry(Entry instance);
public Entry getEntry(Long id);
public boolean removeEntry(Long id);
public boolean batchRemoveEntries(List<Serializable> list);
public IPageList getEntryBy(IQueryObject object);
public boolean updateEntry(Long id, Entry entry);
}
这里只有一个接口，下面实现以上接口。
com.easyjweb.demo.service.impl.EntryServiceImpl.java
内容为：
package com.easyjweb.demo.service.impl;
import java.io.Serializable;
import java.util.List;
import com.easyjf.core.support.query.IQueryObject;
import com.easyjf.web.tools.IPageList;
import com.easyjweb.demo.dao.IEntryDAO;
import com.easyjweb.demo.domain.Entry;
import com.easyjweb.demo.service.IEntryService;
public class EntryServiceImpl implements IEntryService {
// 需要一个EntryDAO对象，我们使用它抽象出来的接口，通过调用它的接口就可以不用管它具体实现是谁了
private IEntryDAO dao;
/*
* (non-Javadoc)
*
* @see com.easyjweb.demo.service.IEntryService#addEntry(com.easyjweb.demo.domain.Entry)
*/
public Long addEntry(Entry instance) {
this.dao.save(instance);
if (instance != null && instance.getId() != null)
return instance.getId();
return null;
}
/*
* (non-Javadoc)
*
* @see com.easyjweb.demo.service.IEntryService#batchRemoveEntries(java.util.List)
*/
public boolean batchRemoveEntries(List<Serializable> list) {
for (Serializable id : list) {
this.dao.remove(id);
}
// 这里实现在实际项目中要作一些修改，直接返回true了
return true;
}
/*
* (non-Javadoc)
*
* @see com.easyjweb.demo.service.IEntryService#getEntry(java.lang.Long)
*/
public Entry getEntry(Long id) {
Entry e = this.dao.get(id);
if (e != null)
;
return e;
}
/*
* (non-Javadoc)
*
* @see com.easyjweb.demo.service.IEntryService#getEntryBy(com.easyjf.core.support.query.IQueryObject)
*/
public IPageList getEntryBy(IQueryObject object) {
return null;
}
/*
* (non-Javadoc)
*
* @see com.easyjweb.demo.service.IEntryService#removeEntry(java.lang.Long)
*/
public boolean removeEntry(Long id) {
// 删除时先得到这个对象，如果对象不为NULL再作删除
Entry e = this.dao.get(id);
if (e != null) {
this.dao.remove(id);
return true;
}
return false;
}
public boolean updateEntry(Long id, Entry entry) {
if (id != null) {
entry.setId(id);
} else {
return false;
}
this.dao.update(entry);
return true;
}
public void setDao(IEntryDAO dao) {
this.dao = dao;
}
}
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2007-09-27 12:17:46.127
