是否可以使用 HashCodeBuilder 和 EqualsBuilder 使 Eclipse 生成 hashCode 并等于
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Is it possible to make eclipse generate hashCode and equals with HashCodeBuilder and EqualsBuilder
提问by daveb
The default generated hashCode and equals implementations are ugly at best.
默认生成的 hashCode 和 equals 实现充其量是丑陋的。
Is it possible to make eclipse generate ones from HashCodeBuilder and EqualsBuilder, and perhaps even a toString with ToStringBuilder?
是否有可能让 Eclipse 从 HashCodeBuilder 和 EqualsBuilder 生成那些，甚至可能是一个带有 ToStringBuilder 的 toString？
采纳答案by toolkit
回答by Andrei Zagorneanu
You can configure Eclipse to generate toString()using a custom builder. In our case ToStringBuilderfrom Apache Commons Lang. You can see here http://azagorneanu.blogspot.com/2011/08/how-to-generate-equals-hashcode.htmlhow to do it.
您可以将 Eclipse 配置为toString()使用自定义构建器生成。在我们的例子中ToStringBuilder来自Apache Commons Lang。你可以在这里看到http://azagorneanu.blogspot.com/2011/08/how-to-generate-equals-hashcode.html怎么做。
That blog post contains also Eclipse templates for generating equals(), hashCode()and compareTo()using Apache Commons Lang builders.
这博客文章也包含Eclipse模板的生成equals()，hashCode()并compareTo()使用Apache Commons Lang中的建设者。
回答by bruno conde
You can do that with Code Templates in Eclipse.
您可以使用 Eclipse 中的代码模板来做到这一点。
Here's a solutionthat I found with examples of HashCodeBuilder and EqualsBuilder.
这是我通过 HashCodeBuilder 和 EqualsBuilder 的示例找到的解决方案。
Template EqualsBuilder:
模板 EqualsBuilder：
public boolean equals(Object o) {
boolean result = false;
if (this == o) {
result = true;
} else if (o instanceof $CLASSNAME$) {
$CLASSNAME$ other = ($CLASSNAME$) o;
result = new org.apache.commons.lang.builder.EqualsBuilder()
.append($END$
.isEquals();
}
return result;
}
Template HashCodeBuilder:
模板 HashCodeBuilder：
public int hashCode() {
return new org.apache.commons.lang.builder.HashCodeBuilder()
.append( $END$ )
.toHashCode();
}
回答by Chinnery
I use the Eclipse plugin called "Commonclipse"
我使用名为“Commonclipse”的 Eclipse 插件
After installation, you see a new context menu item "commonclipse" when you right click within a java source file. It can generate equals, hashcode, toString and compareTo methods based on the Apache commons libraries.
安装后，当您在 Java 源文件中右键单击时，您会看到一个新的上下文菜单项“commonclipse”。它可以基于 Apache 公共库生成 equals、hashcode、toString 和 compareTo 方法。
To install it, use this from within eclipse update: http://commonclipse.sourceforge.net
要安装它，请在 eclipse 更新中使用它：http: //commonclipse.sourceforge.net
回答by Sebastian D'Agostino
I made this template checking several answers, websites and testing it on Eclipse Luna. Go to Windows->Preferences and then to Java->Editor->Templates and add it there.
我制作了这个模板，检查了几个答案、网站并在 Eclipse Luna 上对其进行了测试。转到 Windows-> 首选项，然后转到 Java-> 编辑器-> 模板并将其添加到那里。
${:import(org.apache.commons.lang3.builder.HashCodeBuilder, org.apache.commons.lang3.builder.EqualsBuilder)}
@Override
public int hashCode() {
HashCodeBuilder hashCodeBuilder = new HashCodeBuilder();
hashCodeBuilder.append(${field1:field});
hashCodeBuilder.append(${field2:field});
hashCodeBuilder.append(${field3:field});
hashCodeBuilder.append(${field4:field});
hashCodeBuilder.append(${field5:field});
return hashCodeBuilder.toHashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
${enclosing_type} rhs = (${enclosing_type}) obj;
EqualsBuilder equalsBuilder = new EqualsBuilder();
equalsBuilder.append(${field1}, rhs.${field1});
equalsBuilder.append(${field2}, rhs.${field2});
equalsBuilder.append(${field3}, rhs.${field3});
equalsBuilder.append(${field4}, rhs.${field4});
equalsBuilder.append(${field5}, rhs.${field5});${cursor}
return equalsBuilder.isEquals();
}
回答by Jens Geiregat
Eclipse java code templates for eclipse 3.5.0, derived from Bruno Conde's templates:
Eclipse 3.5.0 的 Eclipse java 代码模板，源自 Bruno Conde 的模板：
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
} else if (obj == this) {
return true;
} else if (obj.getClass() != this.getClass()) {
return false;
}
${enclosing_type} other = (${enclosing_type}) obj;
return new EqualsBuilder()//
.appendSuper(super.equals(other))//
.append(${cursor})//
.isEquals();
}
and
和
@Override
public int hashCode() {
return new HashCodeBuilder(${cursor})//
.append()//
.toHashCode();
}
