我在用户登录程序中遇到了一个奇怪的场景。
- 插入记录..用户名密码等。
- 使用merge()插入记录；
- 然后关闭 IDE (Netbeans)
- 打开 IDE Netbeans 然后启动服务器，启动数据库连接。
- 打开登录浏览器。
- 使用插入的记录登录。
- 我的程序无法检测到桌子上的记录。
调试时，在 find() 之后它不会填充我的实体。也许还有另一个步骤来填充实体？
登录动作
package lotmovement.action;
import com.opensymphony.xwork2.ActionSupport;
import lotmovement.business.crud.RecordExistUserProfile;
import org.apache.commons.lang3.StringUtils;
public class LoginAction extends ActionSupport{
private String userName;
private RecordExistUserProfile recordExistUserProfile;
private String password;
@Override
public void validate(){
if(StringUtils.isEmpty(getUserName())){
addFieldError("userName","Username must not be blanks.");
}
else{
if(!recordExistUserProfile.checkrecordexist(getUserName())){
addFieldError("userName","Username don't exist.");
}
}
if(StringUtils.isEmpty(getPassword())){
addFieldError("password","Password must not be blanks.");
}
else{
if(!recordExistUserProfile.CheckPasswordCorrect(getUserName(), getPassword())){
addFieldError("userName","Password not correct");
}
}
}
public String execute(){
return SUCCESS;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public RecordExistUserProfile getRecordExistUserProfile() {
return recordExistUserProfile;
}
public void setRecordExistUserProfile(RecordExistUserProfile recordExistUserProfile) {
this.recordExistUserProfile = recordExistUserProfile;
}
}
验证程序
/* * 要更改此模板，请选择工具 | 模板 * 并在编辑器中打开模板。*/ 包 lotmovement.business.crud;
导入lotmovement.business.entity.UserProfile；
/** * * @author god-gavedmework */ public class RecordExistUserProfile {
private EntityStart entityStart;
private UserProfile userProfile;
public boolean checkrecordexist(String userId) {
entityStart.StartDbaseConnection();
entityStart.em.find(UserProfile.class, userId);
if (userId.equals(userProfile.getUserId())) {
return true;
} else {
return false;
}
}
public boolean CheckPasswordCorrect(String userId, String password) {
entityStart.StartDbaseConnection();
entityStart.em.find(UserProfile.class, userId);
if (password.equals(userProfile.getPassword())) {
return true;
} else {
return false; ---> It will step here.
}
}
public UserProfile getUserProfile() {
return userProfile;
}
public void setUserProfile(UserProfile userProfile) {
this.userProfile = userProfile;
}
public EntityStart getEntityStart() {
return entityStart;
}
public void setEntityStart(EntityStart entityStart) {
this.entityStart = entityStart;
}
}
实体
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lotmovement.business.entity;
import java.io.Serializable;
import javax.persistence.*;
/**
*
* @author god-gavedmework
*/
@Entity(name = "USERPROFILE") //Name of the entity
public class UserProfile implements Serializable{
@Id //signifies the primary key
@Column(name = "USER_ID", nullable = false,length = 20)
private String userId;
@Column(name = "PASSWORD", nullable = false,length = 20)
private String password;
@Column(name = "FIRST_NAME", nullable = false,length = 20)
private String firstName;
@Column(name = "LAST_NAME", nullable = false,length = 50)
private String lastName;
@Column(name = "SECURITY_LEVEL", nullable = false,length = 4)
private int securityLevel;
@Version
@Column(name = "LAST_UPDATED_TIME")
private java.sql.Timestamp updatedTime;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getSecurityLevel() {
return securityLevel;
}
public void setSecurityLevel(int securityLevel) {
this.securityLevel = securityLevel;
}
public java.sql.Timestamp getUpdatedTime() {
return updatedTime;
}
public void setUpdatedTime(java.sql.Timestamp updatedTime) {
this.updatedTime = updatedTime;
}
}
*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lotmovement.business.crud;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import lotmovement.business.entity.UserProfile;
import org.apache.openjpa.persistence.OpenJPAEntityManager;
import org.apache.openjpa.persistence.OpenJPAPersistence;
public class EntityStart {
EntityManagerFactory factory;
EntityManager em;
public void StartDbaseConnection()
{
factory = Persistence.createEntityManagerFactory("LotMovementPU");
em = factory.createEntityManager();
}
public void StartPopulateTransaction(Object entity){
EntityTransaction userTransaction = em.getTransaction();
userTransaction.begin();
em.merge(entity);
userTransaction.commit();
em.close();
}
public void CloseDbaseConnection(){
factory.close();
}
}
按照建议使用 Trace，这是 SQL 的日志
SELECT t0.LAST_UPDATED_TIME, t0.FIRST_NAME, t0.LAST_NAME, t0.PASSWORD, t0.SECURITY_LEVEL FROM USERPROFILE t0 WHERE t0.USER_ID = ? [params=(String) tok]
这是记录：
USER_ID FIRST_NAME LAST_NAME PASSWORD SECURITY_LEVEL LAST_UPDATED_TIME
tok 1 1 1 1 2012-12-13 08:46:48.802
添加了 Persistence.XML
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="LotMovementPU" transaction-type="RESOURCE_LOCAL">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<non-jta-data-source/>
<class>lotmovement.business.entity.UserProfile</class>
<properties>
<property name="openjpa.ConnectionURL" value="jdbc:derby://localhost:1527/LotMovementDBase"/>
<property name="openjpa.ConnectionDriverName" value="org.apache.derby.jdbc.ClientDriver"/>
<property name="openjpa.ConnectionUserName" value="toksis"/>
<property name="openjpa.ConnectionPassword" value="bitoytoksis"/>
<property name="openjpa.Log" value="SQL=TRACE"/>
<property name="openjpa.ConnectionFactoryProperties" value="PrintParameters=true" />
</properties>
</persistence-unit>
</persistence>
我发现了问题的根本原因。这是关于我如何在 Spring Plugin 中实例化类。
当我将 find() 语句更改为下面时，它现在可以工作了。
UserProfile up = entityStart.em.find(UserProfile.class, "tok");
但是我怎样才能使用 Spring 初始化这个呢？下面的代码不起作用？
private UserProfile userProfile;
...... some codes here.
entityStart.em.find(UserProfile.class, userId);
..... getter setter