一、首先需要下载JSON依赖的jar包。它主要是依赖如下：
json-lib-2.2.2-jdk15
ezmorph-1.0.4
commons-logging-1.0.4
commons-lang-2.4
commons-collections-3.2.1
commons-beanutils
二、实例。
1、身份证错误信息Bean类(ErrorCondition.java)
代码如下:
/**
*@Project: excel
*@Author: chenssy
*@Date: 2013-4-4
*@Copyright: chenssy All rights reserved.
*/
public class ErrorCondition {
private String name; // 姓名
private String idCard; // 身份证
private String status; // 错误状态
private String message; // 错误信息
ErrorCondition(String name,String idCard,String status,String message){
this.name = name;
this.idCard = idCard;
this.status = status;
this.message = message;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getIdCard() {
return idCard;
}
public void setIdCard(String idCard) {
this.idCard = idCard;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
2、JSP页面(index.jsp)
代码如下:
姓名
身份证
错误状态
错误信息
$("#clickMe").click(function(){
var url = "json/jsonTest.action";
$.ajax({
type:'get',
url:url,
dataType: 'json',
success:function(data){
$.each(data,function(i,list){
var _tr = $(""+list.name+""+
list.idCard+""+list.status+
""+list.message+"");
$("#showTable").append(_tr);
})
}
})
})
3、Action处理类(JsonTest_01.java)
代码如下:
/**
*@Project: jsonTest
*@Author: chenssy
*@Date: 2013-4-5
*@Copyright: chenssy All rights reserved.
*/
public class JsonTest_01 {
public String execute() throws IOException{
ErrorCondition r1 = new ErrorCondition("张三", "4306821989021611", "L", "长度错误");
ErrorCondition r2 = new ErrorCondition("李四", "430682198902191112","X", "校验错误");
ErrorCondition r3 = new ErrorCondition("王五", "", "N", "身份证信息为空");
List list = new ArrayList();
list.add(r1);
list.add(r2);
list.add(r3);
//将list转化成JSON对象
JSONArray jsonArray = JSONArray.fromObject(list);
HttpServletResponse response = (HttpServletResponse) ActionContext.getContext().get(ServletActionContext.HTTP_RESPONSE);
response.setCharacterEncoding("UTF-8");
response.getWriter().print(jsonArray);
return null;
}
}
4、struts.xml配置
代码如下:
三、运行结果
开始页面如下：
当点击按钮后
返回的结果如下：