Struts2 + Json + Jstl 展示

jopen 5年前

6.5. Json 内容展示

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Struts 配置文件

<package name="information" extends="main" namespace="/inf">    <action name="Information" class="com.example.action.Infomation">     <result type="tiles">information</result>    </action>   </package>

Action 文件

package cn.netkiller.action;    import java.io.BufferedReader;  import java.io.IOException;  import java.io.InputStreamReader;  import java.io.StringReader;  import java.net.URL;  import java.net.URLConnection;  import java.nio.charset.Charset;    import javax.json.Json;  import javax.json.JsonObject;  import javax.json.JsonReader;    import com.opensymphony.xwork2.Action;  import com.opensymphony.xwork2.ActionSupport;    public class Infomation extends ActionSupport{   /**    *     */   private static final long serialVersionUID = 1L;       private JsonObject jsonObject = null;   private String jsonString = "";     @Override   public String execute() throws IOException {        String URL = "http://www.example.com/list/json/93/20/0.html";    System.out.printf("%s Requeted URL is %s", this.getClass().getName(), URL);        StringBuilder sb = new StringBuilder();    URLConnection urlConn = null;    InputStreamReader in = null;    try {     URL url = new URL(URL);     urlConn = url.openConnection();     if (urlConn != null)      urlConn.setReadTimeout(60 * 1000);     if (urlConn != null && urlConn.getInputStream() != null) {      in = new InputStreamReader(urlConn.getInputStream(), Charset.defaultCharset());      BufferedReader bufferedReader = new BufferedReader(in);      if (bufferedReader != null) {       int cp;       while ((cp = bufferedReader.read()) != -1) {        sb.append((char) cp);       }       bufferedReader.close();      }     }     in.close();       jsonString = sb.toString();       System.out.println(jsonString);       JsonReader reader = Json.createReader(new StringReader(jsonString));       JsonObject jsonObject = reader.readObject();     this.setJsonObject(jsonObject);       reader.close();       // System.out.println(jsonObject.size());       /*for (int i = 0; i < jsonObject.size() - 2; i++) {      JsonObject rowObject = jsonObject.getJsonObject(Integer.toString(i));      // System.out.println(rowObject.toString());      System.out.printf("%s\t%s\t%s\n", rowObject.getJsonString("id"), rowObject.getJsonString("title"),        rowObject.getJsonString("ctime"));     }*/                } catch (Exception e) {     throw new RuntimeException("Exception while calling URL:" + URL, e);    }      return Action.SUCCESS;   }     public JsonObject getJsonObject() {    return jsonObject;   }     public void setJsonObject(JsonObject jsonObject) {    this.jsonObject = jsonObject;   }     public String getJsonString() {    return jsonString;   }     public void setJsonString(String jsonString) {    this.jsonString = jsonString;   }  }

JSP 文件

<%@ page language="java" contentType="text/html; charset=UTF-8"   pageEncoding="UTF-8"%>  <%@ taglib prefix="s" uri="/struts-tags"%>  <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>    <table>   <c:forEach items="${jsonObject.entrySet()}" var="json"    varStatus="status">    <c:if test="${not status.last}">     <tr>      <td>${json.key+1}</td>      <td>${json.value.getJsonString("id")}</td>      <td>${json.value.getJsonString("title")}</td>      <td>${json.value.getJsonString("ctime")}</td>     </tr>    </c:if>   </c:forEach>  </table>  ===================    <c:forEach items="${jsonObject.entrySet()}" var="json">        ${json.value.toString()}  </c:forEach>    ===========    <s:property value="jsonString" />

解决双引号问题

<%@ page language="java" contentType="text/html; charset=UTF-8"   pageEncoding="UTF-8"%>    <%@ taglib prefix="s" uri="/struts-tags"%>  <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>  <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>    <table>   <c:forEach items="${jsonObject.entrySet()}" var="json"    varStatus="status">    <c:if test="${not status.last}">       <c:set var="id"      value="${fn:replace(json.value.getJsonString('id'),'\"', '')}" />     <c:set var="title" value="${fn:replace(json.value.getJsonString('title'),'\"', '')}" />     <c:set var="ctime"      value="${fn:replace(json.value.getJsonString('ctime'),'\"', '')}" />     <tr>      <td><c:out value="${status.count}" /></td>      <td><a href="/inf/Detail.do?id=<c:out value="${id}"/>"><c:out         value="${title}" /></a></td>      <td><c:out value="${ctime}" /></td>     </tr>    </c:if>   </c:forEach>  </table>    <c:set var="pages" value="${jsonObject.getJsonObject('pages')}" />      <a href="${pages.first}">首页</a>  <a href="${pages.before}">上一页</a>  <a href="${pages.next}">下一页</a>  <a href="${pages.last}">尾页</a>    <span>Count: ${pages.count}, Total: ${pages.total}</span>

来自: http://my.oschina.net/neochen/blog/552341