ERRORS [TRACE] [rpctest] - 查找入口点类：使用GWT使用Hibernate将数据插入MySql [英] ERRORS [TRACE] [rpctest] - Finding entry point classes: using GWT to insert data into MySql using Hibernate
本文介绍了ERRORS [TRACE] [rpctest] - 查找入口点类：使用GWT使用Hibernate将数据插入MySql的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用GWT RPC& Hibernate使用eclipse环境从MySql插入和检索数据。我已经在服务接口中写入了两种方法来插入&从MySql中检索数据。
当我实现插入数据的方法时，程序运行正常，但是当我开始实现从MySql检索数据的方法时引发错误。
项目名称为 rpctest &
这里是项目结构：
rpctest
src
-hibernate.cfg.xml
-user.hbm.xml
-rpctest
- > Rpctest.gwt.xml
-rpctest.client
- > Rpctest.java
- > RpctestService.java
- > RpctestServiceAsync.java
-rpctest.server
- > HibernateUtil.java
- > RpctestServiceImpl.java
-rpctest.shared
- > FieldVerifier.java
- > User.java
以下是堆栈跟踪：
[TRACE] [rpctest] - 查找入口点类
[错误] [rpctest] - 无法找到类型'rpctest.client.Rpctest '
[错误] [rpctest] - 提示：以前的编译器错误可能导致此类型不可用
[错误] [rpctest] - 提示：检查模块的继承链;它可能不是继承所需的模块或模块可能没有正确添加其源路径条目
[错误] [rpctest] - 未能从用户代理'Mozilla / 5.0（兼容; MSIE 9.0）加载模块'rpctest' ; Windows NT 6.1; Trident / 5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C）'at 127.0.0.1:51539 b $ b Rpctest.gwt.xml
<？xml version =1.0encoding =UTF-8？>
< module rename-to ='rpctest'>
<！ - 继承核心Web Toolkit的东西。 - >
<继承了name ='com.google.gwt.user.User'/>
<！ - 继承默认的GWT样式表。您可以更改 - >
<！ - 通过取消注释，您的GWT应用程序的主题 - >
<！ - - 以下任何一行。 - >
<继承了name ='com.google.gwt.user.theme.clean.Clean'/>
<！ - < inherits name ='com.google.gwt.user.theme.standard.Standard'/> - >
<！ - < inherits name ='com.google.gwt.user.theme.chrome.Chrome'/> - >
<！ - < inherits name ='com.google.gwt.user.theme.dark.Dark'/> - >
<！ - 其他模块继承 - >
<！ - 其他模块继承 - >
<！ - 指定应用程序入口点类。 - >
< entry-point class ='rpctest.client.Rpctest'/>
<！ - 指定可翻译代码的路径 - >
< source path ='client'/>
< source path ='shared'/>
< / module>
服务界面
package rpctest.client;
import java.util.ArrayList;
导入rpctest.shared.User;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
@RemoteServiceRelativePath（testService）
public interface RpctestService extends RemoteService {
public String addUser（String firstName，String lastName）throws IllegalArgumentException;
public User [] getUser（）;
}
-------
package rpctest.client;
import java.util.ArrayList;
导入rpctest.shared.User;
import com.google.gwt.user.client.rpc.AsyncCallback;
public interface RpctestServiceAsync {
void addUser（String firstName，String lastName，
AsyncCallback< String> callback）;
void getUser（AsyncCallback< User []> asyncCallback）;
}
Rpctest.java
package rpctest.client;
import java.util.ArrayList;
导入rpctest.shared.User;
导入rpctest.shared.FieldVerifier;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.FlexTable;
导入com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
/ **
*入口点类定义< code> onModuleLoad（）< / code> ;.
* /
public class Rpctest implements EntryPoint {
final TextBox firstName = new TextBox（）;
final TextBox lastName = new TextBox（）;
final Button ans =新建按钮（添加用户）;
//最终标签label1 =新标签（First Name）;
//最终标签label2 =新标签（Last Name）;
private FlexTable userFlexTable = new FlexTable（）;
//最终标签errorLabel = new Label（）;
private VerticalPanel mainpanel = new VerticalPanel（）;
private HorizontalPanel addpanel1 = new HorizontalPanel（）;
private HorizontalPanel addpanel2 = new HorizontalPanel（）;
private final RpctestServiceAsync calNumbers = GWT
.create（RpctestService.class）;
/ **
*这是入口点方法。
* /
public void onModuleLoad（）{
userFlexTable.setText（0，0，User ID）;
userFlexTable.setText（0，1，First Name）;
userFlexTable.setText（0，2，Second Name）;
userFlexTable.setText（0，3，Remove）;
//将输入框添加到面板
addpanel1.add（firstName）;
addpanel1.add（lastName）;
firstName.setFocus（true）;
//添加输入
mainpanel.add（userFlexTable）;
mainpanel.add（addpanel1）;
addpanel1.add（ans）;
ans.addClickHandler（new ClickHandler（）{
@Override
public void onClick（ClickEvent event）{
addStock（）;
}
}）;
$ b $ lastName.addKeyPressHandler（new KeyPressHandler（）{
public void onKeyPress（KeyPressEvent event）{$ b $ if（event.getCharCode（）== KeyCodes.KEY_ENTER）{
addStock（）;
}
}
}）;
RootPanel.get（）。add（mainpanel）;
}
private void addStock（）{
String name1 = firstName.getValue（）;
//股票代码必须介于数字，字母或点的1到10个字符之间。
/ * if（！name1.matches（^ [0-9A-Z\\。] {1,10} $））{
Window.alert（'+ name1 +'不是有效的名称。）;
firstName.selectAll（）;
return;
} * /
firstName.setValue（）;
String name2 = lastName.getValue（）;
/ * if（！name2.matches（^ [0-9A-Z\\。] {1,10} $））{
Window.alert（'+ name1 +'不是有效的名称。）;
lastName.selectAll（）;
return;
} * /
lastName.setValue（）;
firstName.setFocus（true）;
calNumbers.addUser（name1，name2，
new AsyncCallback< String>（）{
public void onFailure（Throwable caught）{
//显示RPC错误给用户的消息
Window.alert（检查你的输入）;
}
@Override
public void onSuccess（String result）{
// TODO自动生成方法存根
//将用户添加到表中
int row = userFlexTable.getRowCount（）;
userFlexTable.setText（row，1，result）;
}
}）;
$ b $ private void getUser（）{
calNumbers.getUser（new AsyncCallback< User []>（）{
public void onFailure Throwable caught）{
//向用户显示RPC错误信息
Window.alert（数据库连接问题）;
}
@Override
public void onSuccess（User [] result）{
// TODO自动生成的方法存根
Window.alert（im in getUser！）;
}
}）;
$ b $ / code $ / pre
$ b RpctestServiceImpl.java
package rpctest.server;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
// import com.hib.HibernateUtil;
import org.hibernate.Session;
import org.hibernate.Transaction;
导入rpctest.shared.User;
导入rpctest.client.RpctestService;
public class RpctestServiceImpl extends RemoteServiceServlet implements RpctestService {
public String addUser（String name1，String name2）
throws IllegalArgumentException {
Transaction trns = null;
Session session = HibernateUtil.getSessionFactory（）。openSession（）;
尝试{
trns = session.beginTransaction（）;
User user = new User（）;
user.setFirstName（name1）;
user.setLastName（name2）;
session.save（user）;
session.getTransaction（）。commit（）;
} catch（RuntimeException e）{
if（trns！= null）{
trns.rollback（）;
}
e.printStackTrace（）;
}最后{
session.flush（）;
session.close（）;
}
返回name1 + name2; //测试可伸缩的只有
}
@Override
public User [] getUser（）
{
List< User> getUser = null;
交易trns = null;
Session session = HibernateUtil.getSessionFactory（）。openSession（）;
尝试{
trns = session.beginTransaction（）;
getUser = session.createQuery（from User）。list（）;
// * for（Iterator< User> iter = getUser.iterator（）; iter.hasNext（）;）
// {
// User user = iter。下一个（）;
//
// *}
trns.commit（）;
} catch（RuntimeException e）{
if（trns！= null）{
trns.rollback（）;
}
e.printStackTrace（）;
}最后{
session.flush（）;
session.close（）;
}
return getUser.toArray（new User [getUser.size（）]）;
}
}
解决方案元素看起来很腥，如果尝试使用以下代码会发生什么：< source path ='rpctest / client'/> 和< source path =' hibDomain'/> ？
< source path ='server'/> 肯定是错误的，你不希望你的服务器端代码gwt编译。
I am using GWT RPC & Hibernate to insert and retrieve data from MySql using eclipse environment. I have written two methods in service interfaces to insert & retrieve data from MySql.
The program is running fine when I implemented method to insert data but is raising errors when I started implementing method to retrieve data from MySql.
Name of project is rpctest & same is name of package.
Here structure of project:
rpctest
src
-hibernate.cfg.xml
-user.hbm.xml
-rpctest
-> Rpctest.gwt.xml
-rpctest.client
-> Rpctest.java
-> RpctestService.java
-> RpctestServiceAsync.java
-rpctest.server
-> HibernateUtil.java
-> RpctestServiceImpl.java
-rpctest.shared
-> FieldVerifier.java
-> User.java
Here is stack trace:
[TRACE] [rpctest] - Finding entry point classes
[ERROR] [rpctest] - Unable to find type 'rpctest.client.Rpctest'
[ERROR] [rpctest] - Hint: Previous compiler errors may have made this type unavailable
[ERROR] [rpctest] - Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly
[ERROR] [rpctest] - Failed to load module 'rpctest' from user agent 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)' at 127.0.0.1:51539
Rpctest.gwt.xml
<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='rpctest'>
<!-- Inherit the core Web Toolkit stuff. -->
<inherits name='com.google.gwt.user.User'/>
<!-- Inherit the default GWT style sheet. You can change -->
<!-- the theme of your GWT application by uncommenting -->
<!-- any one of the following lines. -->
<inherits name='com.google.gwt.user.theme.clean.Clean'/>
<!-- <inherits name='com.google.gwt.user.theme.standard.Standard'/> -->
<!-- <inherits name='com.google.gwt.user.theme.chrome.Chrome'/> -->
<!-- <inherits name='com.google.gwt.user.theme.dark.Dark'/> -->
<!-- Other module inherits -->
<!-- Other module inherits -->
<!-- Specify the app entry point class. -->
<entry-point class='rpctest.client.Rpctest'/>
<!-- Specify the paths for translatable code -->
<source path='client'/>
<source path='shared'/>
</module>
Service interfaces
package rpctest.client;
import java.util.ArrayList;
import rpctest.shared.User;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
@RemoteServiceRelativePath("testService")
public interface RpctestService extends RemoteService {
public String addUser(String firstName,String lastName) throws IllegalArgumentException;
public User[] getUser();
}
-------
package rpctest.client;
import java.util.ArrayList;
import rpctest.shared.User;
import com.google.gwt.user.client.rpc.AsyncCallback;
public interface RpctestServiceAsync {
void addUser(String firstName, String lastName,
AsyncCallback<String> callback);
void getUser(AsyncCallback<User[]> asyncCallback);
}
Rpctest.java
package rpctest.client;
import java.util.ArrayList;
import rpctest.shared.User;
import rpctest.shared.FieldVerifier;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
/**
* Entry point classes define <code>onModuleLoad()</code>.
*/
public class Rpctest implements EntryPoint {
final TextBox firstName = new TextBox();
final TextBox lastName = new TextBox();
final Button ans = new Button("Add User");
//final Label label1 = new Label("First Name");
//final Label label2 = new Label("Last Name");
private FlexTable userFlexTable = new FlexTable();
//final Label errorLabel = new Label();
private VerticalPanel mainpanel = new VerticalPanel();
private HorizontalPanel addpanel1 = new HorizontalPanel();
private HorizontalPanel addpanel2 = new HorizontalPanel();
private final RpctestServiceAsync calNumbers = GWT
.create(RpctestService.class);
/**
* This is the entry point method.
*/
public void onModuleLoad() {
userFlexTable.setText(0, 0, "User ID");
userFlexTable.setText(0, 1, "First Name");
userFlexTable.setText(0, 2, "Second Name");
userFlexTable.setText(0, 3, "Remove");
//add input boxes to panel
addpanel1.add(firstName);
addpanel1.add(lastName);
firstName.setFocus(true);
//add input
mainpanel.add(userFlexTable);
mainpanel.add(addpanel1);
addpanel1.add(ans);
ans.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
addStock();
}
});
lastName.addKeyPressHandler(new KeyPressHandler() {
public void onKeyPress(KeyPressEvent event) {
if (event.getCharCode() == KeyCodes.KEY_ENTER) {
addStock();
}
}
});
RootPanel.get().add(mainpanel);
}
private void addStock(){
String name1 = firstName.getValue();
// Stock code must be between 1 and 10 chars that are numbers, letters, or dots.
/*if (!name1.matches("^[0-9A-Z\\.]{1,10}$")) {
Window.alert("'" + name1 + "' is not a valid name.");
firstName.selectAll();
return;
}*/
firstName.setValue("");
String name2 = lastName.getValue();
/*if (!name2.matches("^[0-9A-Z\\.]{1,10}$")) {
Window.alert("'" + name1 + "' is not a valid name.");
lastName.selectAll();
return;
}*/
lastName.setValue("");
firstName.setFocus(true);
calNumbers.addUser(name1,name2,
new AsyncCallback<String>() {
public void onFailure(Throwable caught) {
// Show the RPC error message to the user
Window.alert("check your inputs");
}
@Override
public void onSuccess(String result) {
// TODO Auto-generated method stub
// Add the user to the table.
int row = userFlexTable.getRowCount();
userFlexTable.setText(row, 1, result);
}
});
}
private void getUser(){
calNumbers.getUser(new AsyncCallback<User[]>() {
public void onFailure(Throwable caught) {
// Show the RPC error message to the user
Window.alert("Problem in database connection");
}
@Override
public void onSuccess(User[] result) {
// TODO Auto-generated method stub
Window.alert("i m in getUser!");
}
});
}
}
RpctestServiceImpl.java
package rpctest.server;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
//import com.hib.HibernateUtil;
import org.hibernate.Session;
import org.hibernate.Transaction;
import rpctest.shared.User;
import rpctest.client.RpctestService;
public class RpctestServiceImpl extends RemoteServiceServlet implements RpctestService {
public String addUser(String name1, String name2)
throws IllegalArgumentException {
Transaction trns = null;
Session session = HibernateUtil.getSessionFactory().openSession();
try {
trns = session.beginTransaction();
User user = new User();
user.setFirstName(name1);
user.setLastName(name2);
session.save(user);
session.getTransaction().commit();
} catch (RuntimeException e) {
if(trns != null){
trns.rollback();
}
e.printStackTrace();
} finally{
session.flush();
session.close();
}
return name1+name2; // to test flextable entris only
}
@Override
public User[] getUser()
{
List<User> getUser = null;
Transaction trns = null;
Session session = HibernateUtil.getSessionFactory().openSession();
try {
trns = session.beginTransaction();
getUser = session.createQuery("from User").list();
//* for (Iterator<User> iter = getUser.iterator(); iter.hasNext();)
//{
//User user = iter.next();
//
//*}
trns.commit();
} catch (RuntimeException e) {
if(trns != null){
trns.rollback();
}
e.printStackTrace();
} finally{
session.flush();
session.close();
}
return getUser.toArray(new User[getUser.size()]);
}
}
解决方案 source element looks fishy, what happens if you try with: <source path='rpctest/client'/> and <source path='hibDomain'/> ?
<source path='server'/> is definitely wrong, you don't want your server-side code gwt compiled.
这篇关于ERRORS [TRACE] [rpctest] - 查找入口点类：使用GWT使用Hibernate将数据插入MySql的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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