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JButton.setBounds（x，y，w，h）似乎不起作用

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对于想了解JButton.setBounds的读者，本文将提供新的信息，我们将详细介绍x，y，w，h似乎不起作用，并且为您提供关于(15)各种Button与排列OutlineButton，Button

对于想了解JButton.setBounds的读者，本文将提供新的信息，我们将详细介绍x，y，w，h似乎不起作用，并且为您提供关于(15)各种Button 与排列 OutlineButton，ButtonBar，Expanded，RaisedButton，StadiumBorder，FlatButton.icon、@Column（unique = true）似乎不起作用、@WithUserDetails似乎不起作用、Android ShowCaseView的buttonLayoutParams不起作用的有价值信息。

本文目录一览：

JButton.setBounds（x，y，w，h）似乎不起作用

JButton.setBounds（x，y，w，h）似乎不起作用

import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.SwingUtilities;public class SimpleExample extends JFrame {    public SimpleExample() {        setTitle("Simple example");        setSize(500, 500);        setLocationRelativeTo(null);        setDefaultCloseOperation(EXIT_ON_CLOSE);        JButton jb = new JButton("TEST");        jb.setBorderPainted(true);        jb.setBounds(5, 5, 1, 1); ---> This line        add(jb);    }    public static void main(String[] args) {        SwingUtilities.invokeLater(new Runnable() {            @Override            public void run() {                SimpleExample ex = new SimpleExample();                ex.setVisible(true);            }        });    }}

只需创建一个首选大小的简单按钮即可。该setBounds方法似乎不起作用。我要去哪里错了？

答案1

小编典典

您的框架受布局管理器的控制，它正在决定如何最好地布局组件，并覆盖您使用所指定的值 setBounds

现代GUI需要在各种不同的图形环境中运行（甚至在同一OS上），例如，包括不同的DPI，屏幕大小和字体设置。

布局管理器使您不必担心（减少）这些问题，强烈建议您使用它们

看一眼

  • 使用布局管理器
  • 布局管理器的可视指南

更多细节

(15)各种Button 与排列 OutlineButton，ButtonBar，Expanded，RaisedButton，StadiumBorder，FlatButton.icon

(15)各种Button 与排列 OutlineButton，ButtonBar，Expanded，RaisedButton，StadiumBorder，FlatButton.icon

效果

至于倒数第二行和倒数第一行的效果为啥一样。。可能是fluttersdk升级了。。之前的api不再生效。。算是留坑！

代码

import ''package:flutter/material.dart'';

class ButtonDemo extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final Widget _floatButtonDemo =
        Row(mainAxisAlignment: MainAxisAlignment.center, children: [
      FlatButton(
        onPressed: () {},
        child: Text("FlatButton"),
        splashColor: Colors.grey,
        textColor: Theme.of(context).accentColor,
        color: Colors.black87,
      ),
      FlatButton.icon(
        icon: Icon(Icons.add),
        onPressed: () {},
        label: Text("FlatButton.icon"),
        splashColor: Colors.grey,
        textColor: Theme.of(context).accentColor,
        color: Colors.black87,
      )
    ]);

    final Widget _raisedButtonDemo =
        Row(mainAxisAlignment: MainAxisAlignment.center, children: [
      Theme(
          // data: ThemeData(),
          data: Theme.of(context).copyWith(
              buttonColor: Theme.of(context).accentColor,
              buttonTheme: ButtonThemeData(
                textTheme: ButtonTextTheme.primary,
                // shape: BeveledRectangleBorder(borderRadius: BorderRadius.circular(5.0)),
                shape: StadiumBorder(),
              )),
          child: RaisedButton(
            onPressed: () {},
            child: Text("RaisedButton"),
            splashColor: Colors.grey,
            textColor: Theme.of(context).accentColor,
            // color: Colors.white,
            // textTheme: ButtonTextTheme.primary,
            elevation: 0.0,
          )),
      SizedBox(
        width: 16.0,
      ),
      RaisedButton.icon(
        icon: Icon(Icons.add),
        onPressed: () {},
        label: Text("RaisedButton.icon"),
        splashColor: Colors.grey,
        textColor: Theme.of(context).accentColor,
        elevation: 12.0,
      )
    ]);

    final Widget _outerLineButtonDemo =
        Row(mainAxisAlignment: MainAxisAlignment.center, children: [
      Theme(
          // data: ThemeData(),
          data: Theme.of(context).copyWith(
              buttonColor: Theme.of(context).accentColor,
              buttonTheme: ButtonThemeData(
                textTheme: ButtonTextTheme.primary,
                // shape: BeveledRectangleBorder(borderRadius: BorderRadius.circular(5.0)),
                shape: StadiumBorder(),
              )),
          child: OutlineButton(
            onPressed: () {},
            child: Text("OutlineButton"),
            splashColor: Colors.grey[100],
            textColor: Colors.black,
            borderSide: BorderSide(color: Colors.black),
            highlightedBorderColor: Colors.grey,
            // textTheme: ButtonTextTheme.primary,
          )),
      SizedBox(
        width: 16.0,
      ),
      OutlineButton.icon(
        icon: Icon(Icons.add),
        onPressed: () {},
        label: Text("OutlineButton.icon"),
        splashColor: Colors.grey,
        textColor: Theme.of(context).accentColor,
      )
    ]);

    final Widget _widthOuterLineButton = Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Container(
          width: 200,
          child: OutlineButton(
            onPressed: () {},
            child: Text("_widthOuterLineButton"),
            splashColor: Colors.grey,
            textColor: Colors.blue,
          ),
        )
      ],
    );
    final Widget _expendOuterLineButton = Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Expanded(
          child: OutlineButton(
            onPressed: () {},
            child: Text("_expendOuterLineButton"),
            splashColor: Colors.grey,
            textColor: Colors.blue,
          ),
        )
      ],
    );
    final Widget _expend2OuterLineButton = Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Expanded(
          flex: 1,
          child: OutlineButton(
            onPressed: () {},
            child: Text("权重 for 1"),
            splashColor: Colors.grey,
            textColor: Colors.blue,
          ),
        ),
        SizedBox(
          width: 15,
        ),
        Expanded(
          //权重属性
          flex: 2,
          child: OutlineButton(
            onPressed: () {},
            child: Text("权重 for 2"),
            splashColor: Colors.grey,
            textColor: Colors.blue,
          ),
        )
      ],
    );
    //一行并列行显示的按钮
    final Widget _buttonBar = Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        ButtonBar(
          children: [
            OutlineButton(
              onPressed: () {},
              child: Text("ButtonBar"),
              splashColor: Colors.grey,
              textColor: Colors.blue,
            ),
            OutlineButton(
              onPressed: () {},
              child: Text("ButtonBar"),
              splashColor: Colors.grey,
              textColor: Colors.blue,
            ),
          ],
        )
      ],
    );
    //对刚才的并排中间添加边距
    final Widget _buttonBarPaddingv = Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Theme(
          data: Theme.of(context).copyWith(
              buttonTheme: ButtonThemeData(
                  padding: EdgeInsets.symmetric(horizontal: 100.0))),
          child: ButtonBar(
            children: [
              OutlineButton(
                onPressed: () {},
                child: Text("ButtonBar"),
                splashColor: Colors.grey,
                textColor: Colors.blue,
              ),
              OutlineButton(
                onPressed: () {},
                child: Text("ButtonBar"),
                splashColor: Colors.grey,
                textColor: Colors.blue,
              ),
            ],
          ),
        )
      ],
    );
    return Scaffold(
      appBar: AppBar(
        title: Text("button Demo"),
        elevation: 0.0,
      ),
      body: Container(
        padding: EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            _floatButtonDemo,
            _raisedButtonDemo,
            _outerLineButtonDemo,
            _widthOuterLineButton,
            _expendOuterLineButton,
            _expend2OuterLineButton,
            _buttonBar,
            _buttonBarPaddingv
          ],
        ),
      ),
    );
  }
}

 

@Column（unique = true）似乎不起作用

@Column（unique = true）似乎不起作用

即使将属性设置为@Column(unique=true)，我仍然会插入重复的条目。

@Entitypublic class Customer {    @Id    @GeneratedValue(strategy = GenerationType.AUTO)    private Long id;    @Column(unique=true )    private String name;    ...}

我设置了name使用定期EL在JSF。我没有用create表JPA

答案1

小编典典

我没有使用JPA创建表

然后，您应该在CREATE语句中向表中添加唯一约束，例如，如果您使用的是MySQL：

create Customer (id int primary key, name varchar(255) unique);

@WithUserDetails似乎不起作用

@WithUserDetails似乎不起作用

如何解决@WithUserDetails似乎不起作用？

我目前无法测试，但这是一个 可能的 解决方案。

查看@WithUserDetails实现：

@WithSecurityContext(factory = WithUserDetailsSecurityContextFactory.class)
public @interface WithUserDetails {
    ...
}

final class WithUserDetailsSecurityContextFactory implements
        WithSecurityContextFactory<WithUserDetails> {

    private beanfactory beans;

    @Autowired
    public WithUserDetailsSecurityContextFactory(beanfactory beans) {
        this.beans = beans;
    }

    public SecurityContext createSecurityContext(WithUserDetails withUser) {
        String beanName = withUser.userDetailsServiceBeanName();
        UserDetailsService userDetailsService = StringUtils.hasLength(beanName)
                ? this.beans.getBean(beanName, UserDetailsService.class)
                : this.beans.getBean(UserDetailsService.class);
        String username = withUser.value();
        Assert.hasLength(username, "value() must be non empty String");
        UserDetails principal = userDetailsService.loadUserByUsername(username);
        Authentication authentication = new UsernamePasswordAuthenticationToken(
                principal, principal.getpassword(), principal.getAuthorities());
        SecurityContext context = SecurityContextHolder.createEmptyContext();
        context.setAuthentication(authentication);
        return context;
    }
}

您可以按照相同的模式创建您选择的安全上下文：

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
@WithSecurityContext(factory = WithoutUserFactory.class)
public @interface WithoutUser {
}

public class WithoutUserFactory implements WithSecurityContextFactory<WithoutUser> {
    public SecurityContext createSecurityContext(WithoutUser withoutUser) {
        return SecurityContextHolder.createEmptyContext();
    }
}

其他可获得的注释：WithAnonymousUser，WithMockUser，WithSecurityContext（和WithUserDetails）

解决方法

我有一个使用Spring Social Security进行身份验证和授权的应用程序。不幸的是，我在模拟Spring
Security时遇到了一些问题。似乎根本不起作用。

我有一个REST控制器，如果它应返回的实体的标识符不可用，则返回404 Not
Found。如果用户未登录，则任何页面都将重定向到我的应用程序的社交登录页面。

我在这里读到，@WithUserDetails注释最适合我。

所以我的测试方法看起来像这样

@Test
@SqlGroup({
    @Sql(executionPhase = ExecutionPhase.BEFORE_TEST_METHOD,statements = "INSERT INTO UserAccount(id,creationtime,modificationtime,version,email,firstname,lastname,role,signinprovider) VALUES (1,''2008-08-08 20:08:08'',1,''user'',''John'',''Doe'',''ROLE_USER'',''FACEBOOK'')"),})
@Rollback
@WithUserDetails
public void ifNoTeamsInTheDatabaseThenTheRestControllerShouldReturnNotFoundHttpStatus() {
    ResponseEntity<String> response = restTemplate.getForEntity("/getTeamHistory/{team}",String.class,"Team");
    Assert.assertEquals(HttpStatus.NOT_FOUND,response.getStatusCode());
}

但这似乎根本不起作用。看来测试方法是用匿名用户执行的，因为我得到的状态是200 OK。

我的测试课是这样注释的

@RunWith(SpringRunner.class)
@ActiveProfiles("dev")
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@Transactional
public class TeamRestControllerTest {
    //...
}

有没有人遇到过由Spring Social提供的嘲笑Spring Security这样的问题？

Android ShowCaseView的buttonLayoutParams不起作用

Android ShowCaseView的buttonLayoutParams不起作用

我在我的应用程序中使用ShowCaseView库.我想将“确定”按钮移到左侧.
我使用了这段代码(在库中也一样)： 
// The following code will reposition the OK button to the left.
RelativeLayout.LayoutParams lps = new RelativeLayout.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
lps.addRule(RelativeLayout.ALIGN_PARENT_BottOM);
lps.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
int margin = ((Number) (getResources().getdisplayMetrics().density * 12))
        .intValue();
lps.setMargins(margin,margin,margin);
View showcasedView = findViewById(R.id.ib_next);
ViewTarget target = new ViewTarget(showcasedView);
ShowcaseView.ConfigOptions co = new ShowcaseView.ConfigOptions();
co.buttonLayoutParams = lps;
co.fadeInDuration = 1000;
co.fadeOutDuration = 1000;
ShowcaseView sv = ShowcaseView.insertShowcaseView(target,this,R.string.showcase_title,R.string.showcase_details,co);

但它不起作用？任何人都可以告诉问题在哪里？

解决方法

我知道这个问题已经过时了,但万一有人需要一个有效的解决方案： 
RelativeLayout.LayoutParams lps = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
// This aligns button to the bottom left side of screen
lps.addRule(RelativeLayout.ALIGN_PARENT_BottOM);
lps.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
// Set margins to the button,we add 16dp margins here
int margin = ((Number) (getResources().getdisplayMetrics().density * 16)).intValue();
lps.setMargins(margin,margin);

ViewTarget target = new ViewTarget(R.id.buttonBlocked,this);
sv = new ShowcaseView.Builder(this)
        .withMaterialShowcase()
        .setTarget(target)
        .setContentTitle(R.string.showcase_main_title)
        .setContentText(R.string.showcase_main_message)
        .build();
// Set declared button position to ShowcaseView
sv.setButtonPosition(lps);

这对我有用,希望它对某人有所帮助.

今天关于JButton.setBounds和x，y，w，h似乎不起作用的分享就到这里，希望大家有所收获，若想了解更多关于(15)各种Button 与排列 OutlineButton，ButtonBar，Expanded，RaisedButton，StadiumBorder，FlatButton.icon、@Column（unique = true）似乎不起作用、@WithUserDetails似乎不起作用、Android ShowCaseView的buttonLayoutParams不起作用等相关知识，可以在本站进行查询。

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