声明：作者是根据 Hongyang的博客自己实践之后，根据自己的理解写的，有什么不对的地方还望指正。
先放两张效果图
在此处创建的plugin工程，如下图所示
填写完工程名之后， 创建的工程结构如下所示
其中plugin.xml就和j2ee中web.xml功能类似，是配置插件属性的地方。
首先，new一个Action，在弹出界面简单填写类的信息，如下图
其中第一部分是类相关的信息，ActionID表示一个独一无二的名字，就像Android清单文件中的包名一样。
第二部分是将这个功能添加到哪个菜单中去，当前选择的是添加到Edit菜单中并且作为第一个子菜单。
第三部分是这个功能的快捷键，可将光标置于输入框内，点击键盘进行输入
可以看到在生成的类中有public void actionPerformed(AnActionEvent e) 这个方法，关键的地方就在这个方法中，在IDE中几乎所有操作都可以在此方法中捕捉到。如下图
首先获取选中的文字，调用以下api
final Editor mEditor = e.getData(PlatformDataKeys.EDITOR);
if (null == mEditor) {
return;
}
SelectionModel model = mEditor.getSelectionModel();
final String selectedText = model.getSelectedText();
if (TextUtils.isEmpty(selectedText)) {
return;
}
获取到选中的文字之后，就可以调用申请到的有道翻译接口进行翻译，要翻译的文本，必须是UTF-8编码，字符长度不能超过200个字符，需要进行urlencode编码。翻译完成之后就可以以一个类似popupWindow的窗口将接口展示出来了。
private void showPopupBalloon(final Editor editor, final String result) {
ApplicationManager.getApplication().invokeLater(new Runnable() {
public void run() {
JBPopupFactory factory = JBPopupFactory.getInstance();
factory.createHtmlTextBalloonBuilder(result, null, new JBColor(new Color(186, 238, 186), new Color(73, 117, 73)), null)
.setFadeoutTime(5000)
.createBalloon()
.show(factory.guessBestPopupLocation(editor), Balloon.Position.below);
}
});
}
点击绿色运行按钮，测试成功后就可以生成安装包了。在Build菜单中选择 Prepare Plugin Ｍodule ‘your project name' For Deployment就可以生成安装包了。
我只是为了自己用，所以没有在plugin.xml文件中添加更多的详细信息，至于怎么发布到插件库，还请大家自行ｇｏｏｇｌｅ，下面是完整的代码。点击这里下载我编译好的插件，ｚｉｐ格式的。
完整代码如下：
action 类
import com.google.gson.Gson;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.SelectionModel;
import com.intellij.openapi.ui.popup.Balloon;
import com.intellij.openapi.ui.popup.JBPopupFactory;
import com.intellij.ui.JBColor;
import org.apache.http.util.TextUtils;
import java.awt.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
/**
* Created by huangyuan on 16-7-16.
*/
public class TranslateAction extends AnAction {
//有道翻译接口
private String translateUrl = "http://fanyi.youdao.com/openapi.do?keyfrom=AS-TranslatePlugin&key=your key&type=data&doctype=json&version=1.1&q=%s";
public void actionPerformed(AnActionEvent e) {
final Editor mEditor = e.getData(PlatformDataKeys.EDITOR);
if (null == mEditor) {
return;
}
SelectionModel model = mEditor.getSelectionModel();
//获取选中的文字
final String selectedText = model.getSelectedText();
if (TextUtils.isEmpty(selectedText)) {
return;
}
// Messages.showMessageDialog(selectedText, "选中的文字", Messages.getInformationIcon());
TranslateBean translateBean = doTranslate(selectedText);
showPopupBalloon(mEditor,translateBean.toString());
}
/**
*
* @param translateText 需要翻译的文本
* @return TranslateBean 翻译完成后转换为对象
* 调用翻译接口，将返回的数据用Gson封装为对象
*/
private TranslateBean doTranslate(String translateText) {
Gson gson = new Gson();
InputStream is = null;
StringBuffer resultData = new StringBuffer();
try {
URL url = new URL(String.format(translateUrl, URLEncoder.encode(translateText,"utf-8")));
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setDoInput(true); //允许输入流，即允许下载
httpURLConnection.setDoOutput(true); //允许输出流，即允许上传
httpURLConnection.setUseCaches(false); //不使用缓冲
httpURLConnection.setRequestMethod("GET"); //使用get请求
is = httpURLConnection.getInputStream(); //获取输入流，此时才真正建立链接
InputStreamReader isr = new InputStreamReader(is);
BufferedReader bufferReader = new BufferedReader(isr);
String inputLine = "";
while((inputLine = bufferReader.readLine()) != null){
resultData.append(inputLine);
}
System.out.println(resultData.toString());
TranslateBean translateBean = gson.fromJson(resultData.toString(), TranslateBean.class);
return translateBean;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
*
* @param editor Edit
* @param result 要展示的文字
* 以类似popupwindow的形式展示，别问我为什么这么写，我也不知道，我是抄的api
*/
private void showPopupBalloon(final Editor editor, final String result) {
ApplicationManager.getApplication().invokeLater(new Runnable() {
public void run() {
JBPopupFactory factory = JBPopupFactory.getInstance();
factory.createHtmlTextBalloonBuilder(result, null, new JBColor(new Color(186, 238, 186), new Color(73, 117, 73)), null)
.setFadeoutTime(5000)
.createBalloon()
.show(factory.guessBestPopupLocation(editor), Balloon.Position.below);
}
});
}
}
TranslateBean
import java.util.List;
/**
* Created by huangyuan on 16-7-17.
*/
public class TranslateBean {
private BasicBean basic;
private String query;
private int errorCode;
private List<String> translation;
private List<WebBean> web;
public BasicBean getBasic() {
return basic;
}
public void setBasic(BasicBean basic) {
this.basic = basic;
}
public String getQuery() {
return query;
}
public void setQuery(String query) {
this.query = query;
}
public int getErrorCode() {
return errorCode;
}
public void setErrorCode(int errorCode) {
this.errorCode = errorCode;
}
public List<String> getTranslation() {
return translation;
}
public void setTranslation(List<String> translation) {
this.translation = translation;
}
public List<WebBean> getWeb() {
return web;
}
public void setWeb(List<WebBean> web) {
this.web = web;
}
public static class BasicBean {
private List<String> explains;
private String phonetic;
public String getPhonetic() {
return phonetic;
}
public void setPhonetic(String phonetic) {
this.phonetic = phonetic;
}
public List<String> getExplains() {
return explains;
}
public void setExplains(List<String> explains) {
this.explains = explains;
}
}
public static class WebBean {
private String key;
private List<String> value;
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public List<String> getValue() {
return value;
}
public void setValue(List<String> value) {
this.value = value;
}
}
@Override
public String toString() {
StringBuffer webStringBuffer = new StringBuffer();
for(int i =0;i<web.size();i++)
{
webStringBuffer.append(web.get(i).getKey() +":\t");
for(int j =0 ;j<web.get(i).getValue().size();j++)
{
webStringBuffer.append(web.get(i).getValue().get(j));
}
webStringBuffer.append("\n");
}
StringBuffer translateBuffer = new StringBuffer();
for(int i = 0;i<basic.getExplains().size();i++)
{
translateBuffer.append(basic.getExplains().get(i) +"\n");
}
return query +"\n" + basic.getPhonetic() +"\n" + translateBuffer.toString() +"\n网络释义+\n" + webStringBuffer.toString();
}
}
