package a.b.client;
public class Trail implements EntryPoint{
Button b=new Button("Click");
FlowPanel fs=new FlowPanel();
int i=0;
private final TrailInterfaceAsync obj = GWT
.create(TrailInterface.class);
@Override
public void onModuleLoad() {
RootPanel.get().add(b);
RootPanel.get().add(fs);
b.addClickHandler(new ClickHandler(){
@Override
public void onClick(ClickEvent event) {
obj.getDetails(new AsyncCallback<ArrayList<String>>(){
@Override
public void onFailure(Throwable caught) {
// TODO Auto-generated method stub
}
@Override
public void onSuccess(ArrayList<String> result) {
try{
System.out.println("size:"+result.size());
for(i=1;i<=result.size()-1;i++)
{
HTML l=new HTML(result.get(i).toString());
fs.add(l);
}
}
catch(Exception e)
{
e.printStackTrace();
}
}});
}});
}
}
服务器
package a.b.server;
import a.b.client.TrailInterface;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
public class TrailImpl extends RemoteServiceServlet implements TrailInterface {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public ArrayList<String> getDetails() {
Connection con;
Statement stmt;
ResultSet resultSet;
ArrayList<String> details=new ArrayList<String>();
try
{
System.setSecurityManager(null);
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager
.getConnection("jdbc:mysql://69.162.121.114:3306/AyushCareDB?"
+ "user=xxxxx&password=yyyyyy");
if(con!=null)
System.out.println("success!");
else
System.out.println("fail!");
stmt = con.createStatement();
// Result set get the result of the SQL query
resultSet = stmt.executeQuery("select * from LocationTable");
while(resultSet.next())
{
details.add(resultSet.getString(1));
}
}
catch(Exception e)
{
e.printStackTrace();
}
return details;
}
}
的web.xml
<!-- Servlets -->
<servlet>
<servlet-name>TrailImpl</servlet-name>
<servlet-class>a.b.server.TrailImpl</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TrailImpl</servlet-name>
<url-pattern>/trailpath/trail</url-pattern>
</servlet-mapping>
<!-- Default page to serve -->
<welcome-file-list>
<welcome-file>Trail.html</welcome-file>
当我做Run As-Web Application时 它显示如下错误:
Jul 18, 2013 5:02:09 PM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: /%3C%=request.getContextPath()%%3E/trailpath/trailpath.nocache.js: java.lang.NumberFormatException: =r
我无法理解它的来源?请帮帮我。
以及我尝试在之前工作时在Tomcat中部署这个简单的GWT项目(突然显示上面的错误).i现在没有改变任何东西。但是犯了错误。当它正在工作时,我得到了错误,这是在后期。但我必须在我的代码中使用GWT.getHostPageBaseURL()或GWT.getHostPageBaseURL()方法。我没有任何重定向到其他页面听到。我找不到任何解决办法。
答案 0 :(得分:0)
乍一看,我说您使用JSP语法从Trail.html页面引用trailing.nocache.js文件,但服务器不将Trail.html评估为JSP(默认情况下,只有* .jsp文件被视为JSP)。
NumberFormatException: =r
在评估网址(%3C%=request
)时来自服务器,其中%=r
(来自%=request
)评估为网址转义。因此,NumberFormatException
来自于尝试将=r
解析为十六进制数。
解决方案:从您的Trail.html页面中删除JSP语法,或将该页面更改为JSP(例如将其重命名为Trail.jsp
)