使用谷歌番石榴的Objects.ToStringHelper [英] Using Google Guava's Objects.ToStringHelper

问题描述

我在commons-lang中使用了ToStringBuilder.reflectionToString(class)来为简单的DTO实现toString().现在，我正在尝试使用Google Guava代替Apache commons库.我在番石榴中找到了Objects.ToStringHelper.但是如果班上有很多成员，这太冗长了.例如:

I used ToStringBuilder.reflectionToString(class) in commons-lang, to implement toString() for simple DTOs. Now I'm trying to use Google Guava instead of Apache commons library. And I found Objects.ToStringHelper in Guava. But it's too verbose if there're lots of members in the class. For example:

@Override
public String toString() {
    return MoreObjects.toStringHelper(this.getClass()).add("name", name)
            .add("emailAddress", emailAddress)
            .add("department", department).add("yearJoined", yearJoined)
            .toString();
}

如果我使用commons-lang，

要简单得多.

is much simpler if I use commons-lang:

@Override
public String toString() {
    return ToStringBuilder.reflectionToString(this);
}

是否有更好的方法来用Guava而不是commons-lang来实现toString()?

Is there any better ways to implement toString() with Guava, not with commons-lang?

Guava文档

推荐答案

我对番石榴的com.google.common.base.MoreObjects.toStringHelper()有一些窍门.我将 IntelliJ IDEA 配置为在自动生成toString()方法时使用它.我假设您可以在 Eclipse 中执行相同的操作.这是在 Intellij 中完成的方法:

I have a little trick for Guava's com.google.common.base.MoreObjects.toStringHelper(). I configured IntelliJ IDEA to use it when auto-generating toString() methods. I assume you can do the same in Eclipse. Here's how to do it in Intellij:

• 走进课堂
• 点击 Alt + 插入弹出生成"菜单
• 选择toString()
• 点击设置"按钮
• 转到模板"标签
• 创建一个名为"Guava's MoreObjects.toStringHelper()"的新模板(我通过复制"ToStringBuilder"模板来做到这一点)

• 将模板更改为:

• go inside a class
• hit Alt + Insert to popup the "Generate" menu
• choose toString()
• click the "Settings" button
• go to the "Templates" tab
• create a new template named "Guava's MoreObjects.toStringHelper()" (I did it by copying the "ToStringBuilder" template)

• change the template to:

public String toString() {
#set ($autoImportPackages = "com.google.common.base.MoreObjects")
    return MoreObjects.toStringHelper(this)
#foreach ($member in $members)
    .add("$member.name", $member.accessor)
#end
    .toString();
}

保存模板，关闭设置"和生成toString()"窗口

save the template, close the "Settings" and "Generate toString()" windows

在类中添加新字段时，只需重新生成toString()方法(IDEA会要求您确认要替换现有的toString()方法).

When you add a new field to the class, simply re-generate the toString() method (IDEA will ask you to confirm that you want to replace the existing toString() method).

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