当我关闭我的应用程序时,我在LogCat上收到此消息
showStatusIcon on inactive InputConnection
我在某个地方读过,但我不确定,这意味着我没有发布一些与内存使用相关的东西.我怎么解决这个问题?
我想导出我的项目,以便将代码重用到新项目中.每次我尝试导出它时,"文件系统"和"存档文件"都会出错
Problems were encountered during export:
Error exporting name_of_my_project/bin/jarlist.cache: Resource is out of sync with the file system: '/name_of_my_project/bin/jarlist.cache'.
Resource is out of sync with the file system: '/name_of_my_project/bin/jarlist.cache'.
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也许这取决于我在不使用Eclipse的情况下将文件复制到我的项目文件夹中的事实.有办法解决问题吗?
我在另一个班级犯了一个错误,这就是为什么它不起作用.下面的代码似乎是正确的
我正在尝试创建一个动态的GridLayout.在另一个类中,不是这个,我有一个方法来设计我的gridlayout的行和列.在下面的课程中,我为GridLayout添加了一些按钮:
int buttons= 6;//the number of bottons i have to put in GridLayout
int buttonsForEveryRow = 3; // buttons i can put inside every single row
int buttonsForEveryRowAlreadyAddedInTheRow =0; // count the buttons added in a single rows
int columnIndex=0; //cols index to which i add the button
int rowIndex=0; //row index to which i add the button
for(int i=0; i < buttons;i++){
/*if numeroBottoniPerRigaInseriti equals numeroBottoniPerRiga i have to put the other buttons in a new row*/
if(buttonsForEveryRowAlreadyAddedInTheRow …Run Code Online (Sandbox Code Playgroud) 我能够让我的应用程序再次运行,遵循user2821894的建议,但在尝试调用servlet后,tomcat 7再次停止工作!如果我尝试删除我调用我的servlet的代码我的web应用程序doesent'work !! 一旦我有一个servlet问题tomcat停止工作.
我在eclipse上启动我的web项目时遇到了问题.我遇到了Tomcat 7的问题.所以我从eclipse中删除'tomcat 7然后再添加它(再次添加tomcat 7).
现在我启动我的web项目没有问题,但我的servlet有问题.例如,我得到错误
WebServlet cannot be resolved to a type
The attribute value is undefined for the annotation type
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我在我的项目中添加了servlet-api 3.0.jar,但我仍然遇到这些问题.
这是我的servlet的代码
package Jeans;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.annotation.WebServlet;
import com.sun.java.swing.plaf.windows.TMSchema.Part;
import javax.servlet.http.Part;
@WebServlet("/FileUploadDBServlet ")
//// i got an error here////////////////////////////
@MultipartConfig(maxFileSize = 16177215)
public class FileUploadDBServlet extends HttpServlet {
private String dbURL = "db";
private String dbUser = …Run Code Online (Sandbox Code Playgroud) 我有一个名为Menu的类,注释为@Entity,我需要在名为GestoreMessaggi的类中使用一个方法
....
@Component
@Entity
@Table(name="menu")
public class Menu implements Serializable{
@Autowired
@Transient // because i dont' save this field on the DB
private GestoreMessaggi gestoreMessaggi;
.....
public void setCurrentLanguage(){
/* I got the error both if use gestoreMessaggi
this way and if I use the autowired istance of GestoreMessaggi*/
GestoreMessaggi gestoreMessaggi = new GestoreMessaggi();
gestoreMessaggi.gest();
}
.....
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这是GestoreMessaggi类的相关代码
@Component
public class GestoreMessaggi {
@Autowired
private ReloadableResourceBundleMessageSource messageSource;
public void gest(){
messageSource.doSomething() <--- here messageSource …Run Code Online (Sandbox Code Playgroud) @Component
@Entity
@Table(name="menu")
@Configurable
public class Menu implements Serializable{
....
@OneToMany(mappedBy="menu", fetch=FetchType.EAGER)
private Set<VoceMenu> voceMenuList;
public Set<VoceMenu> getVoceMenuList() {
return voceMenuList;
}
public void setVoceMenuList(Set<VoceMenu> voceMenuList) {
this.voceMenuList = voceMenuList;
}
.....
}
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我打印一个表单来编辑菜单,以及它的相对VoceMenu对象,这样:
<form:form action="editMenu" method="post" commandName="menu">
Menu id<form:input path="id" maxlength="11"/><br/>
......
<c:forEach items="${menu.voceMenuList}" varStatus="counter">
<form:input path="voceMenuList[${counter.index}].id" maxlength="11"/>
.....
</c:forEach>
<input type="submit">
</form:form>
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但是,当我尝试保存对象菜单时,我收到此错误:
bean类[com.springgestioneerrori.model.Menu]的属性'voceMenuList [0]'无效:无法从大小为0的集合获取索引为0的元素,使用属性路径'voceMenuList [0]'访问
我有一个方法用于验证Spring MVC中的POJO(这允许我依赖于@AnnotationPOJO,同时在不使用注释的情况下随时随地以编程方式验证POJO @Valid).
需要将对象的Class传递给方法才能验证:
public void validate(Class clazz, Object model, BindingResult result){
...
Set<ConstraintViolation<clazz>> constraintViolations=validator.validate((clazz)model);
for (ConstraintViolation<clazz> constraintViolation : constraintViolations) {
...
}
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我的代码不正确,因为得到错误:
clazz无法解析为某种类型
我应该如何编辑我的代码,以便能够将任何我想要的类传递给此方法?
谢谢
我有这个Entity,那是一个超级类:
@Entity
public class Father implements Serializable{
@Column(name = "name")
@Size(min=1, max=10)
@Pattern(regexp="^[A-Za-z ]*$")
@NotNull
private String name;
}
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这个,扩展了上面的一个:
@Entity
public class FatherSub extends Father implements Serializable{
private String name;
}
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正如你所看到的,FatherSub我没有@Annotations也不想要它们。我怎样才能覆盖它们?有办法吗?
似乎注释@NotNull保留在子类中,并要求我填写
Father.name(不是FatherSub.name),正如您在这 2 个 Eclipse 打印屏幕图片中看到的那样。
谢谢
我有一堂课叫News. 任何新闻都可以有很多Photo。这些是我的桌子
news news_photo photo
-------------- ---------------------- ------------
| id | title | | id_news | id_photo | | id | url |
-------------- ---------------------- ------------
| | | |
|----------------------| |--------------|
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这是我的班级News
@Entity
@Table(name = "news")
public class News extends ElementoPersistente implements Serializable{
...
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true)
@JoinTable(name = "news_photo",
joinColumns = { @JoinColumn(name = "id_news")},
inverseJoinColumns = { @JoinColumn(name = "id_photo") })
private List<photo> photos;
...
} …Run Code Online (Sandbox Code Playgroud) 我读了很多关于这个主题的帖子,但没有人帮助过我.我正在使用Android Studio并遵循本指南
这是项目的gradle:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.2.3'
classpath 'com.google.gms:google-services:3.0.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
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这是应用程序gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.1"
defaultConfig {
applicationId "com.xyv.appname"
minSdkVersion 15
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
} …Run Code Online (Sandbox Code Playgroud)