AJAX方式
js:界面
var prjcontextpath='';
$(document).ready(function(){
//===============GET==============================
$("#username").blur(function(){
$.ajax({
type: "GET",
url: prjcontextpath + "/zhuceAction!queryUserName.action?username=" + $("#username").val()+"&pwd="+$("#pwd").val(),
dataType: "json",
success: function(data) { if (data.success) {
$("#usernamemsg").html("" + data.msg + "");
} else {
$("#usernamemsg").html("" + data.msg + "");
}
},
error: function(jqXHR){
alert("发生错误：" + jqXHR.status);
}
});
});
//===============POST==============================
$("#username").blur(function(){
$.ajax({
type: "POST",
url: prjcontextpath + "/zhuceAction!queryUserName.action",
data: {
username: $("#username").val(),
pwd: $("#pwd").val()
},
dataType: "json",
success: function(data){ if (data.success) {
$("#usernamemsg").html("" + data.msg + "");
} else {
$("#usernamemsg").html("" + data.msg + "");
}
},
error: function(jqXHR){
alert("发生错误：" + jqXHR.status);
}
});
});
});注意：此action要继承BaseAction
public void queryUserName() throws IOException {
System.out.println("username=" + user.getUsername());
System.out.println("pwd=" + user.getPwd()); // 去数据库中验证
boolean flag = true;
//形成JSON串
String html = ""; if (flag) {
html = "{\"success\":1,\"msg\":\"用户名，可以使用！\"}";
} else {
html = "{\"success\":0,\"msg\":\"用户名，不可以使用！\"}";
} // 调用BaseAction中的方法向输出流中写JSON串 responseWriterjson(html);
}BaseAction代码：
package action;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.ServletActionContext;public class BaseAction { public HttpServletResponse response; /**
* 返回页面数据
* @param returnString 返回数据
* @throws IOException 异常 */
public void responseWriterjson(String returnString) throws IOException {
response = ServletActionContext.getResponse();
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(returnString);
response.flushBuffer();
response.getWriter().close();
} /**
* 返回页面xml数据
* @param returnString 返回数据
* @throws IOException 异常 */
public void responseWriterXML(String returnString) throws IOException {
response = ServletActionContext.getResponse();
response.setCharacterEncoding("utf-8");
response.setContentType("text/xml");
response.setHeader("Cache-Control", "no-cache");
response.getWriter().write(returnString);
response.flushBuffer();
response.getWriter().close();
} /**
* 返回页面数据
* @param returnString
* @throws IOException 异常 */
public void printWriter(String returnString) throws IOException {
response = ServletActionContext.getResponse();
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.println(returnString);
out.close();
}
}
POST方式
js:
//-----------对用户名进行查询start-------------------------------------------$(document).ready(function() { query(); });//-----------对用户名进行查询end-------------------------------------------//加载查询土地登记审批表（判断:add/update/search）function query() { var username = "aa"; var pwd = "bb"; $.post(prjcontextpath+"/updateAction!query.action", {username:username,pwd:pwd},callBackQuerySuccess); }function callBackQuerySuccess(json) { if(json.data != null || json.data !="") { //向页面赋值 /* * 方法1 for(var i=0;i<json.data.length;i++) { var tbBody = ""; var trColor=""; alert("i="+i); var editData=json.data[i]; if (i % 2 == 0) { trColor = "even"; } else { trColor = "odd"; } tbBody += "" + editData.name + "" + "" + editData.age + ""; $("#myTb").append(tbBody); } */ //向页面赋值方法2 var typeData = json.data; $.each(typeData, function(i, n) { var tbBody = "" var trColor; if (i % 2 == 0) { trColor = "even"; } else { trColor = "odd"; } tbBody += "" + n.name + "" + "" + n.age + "" + "" + n.like[0] + ""; $("#myTb").append(tbBody); }); } }
action：
package action;import java.io.IOException;import java.util.ArrayList;import java.util.List;import bean.User;import bean.UserInfo;import com.alibaba.fastjson.JSON;import com.opensymphony.xwork2.ModelDriven;public class UpdateAction extends BaseAction implements ModelDriven {
User user = new User(); public User getModel() { return user;
} public void query() throws IOException {
System.out.println("username=" + user.getUsername());
System.out.println("pwd=" + user.getPwd());
UserInfo userinfo = new UserInfo();
userinfo.setName("张三");
userinfo.setAge(20);
userinfo.setBirthday("1990-10-09");
String[] likes = new String[] { "篮球", "足球" };
userinfo.setLike(likes);
userinfo.setHasgirlfirend(false);
userinfo.setCar(null);
UserInfo userinfo2 = new UserInfo();
userinfo2.setName("李四");
userinfo2.setAge(20);
userinfo2.setBirthday("1991-11-11");
String[] likes1 = new String[] { "台球", "羽毛球" };
userinfo2.setLike(likes1);
userinfo2.setHasgirlfirend(false);
userinfo2.setCar(null);
ListuserjsonList = new ArrayList();
userjsonList.add(userinfo);
userjsonList.add(userinfo2);
String jsonArray = JSON.toJSONString(userjsonList);
StringBuffer responseString = new StringBuffer();
responseString.append("{\"total\":")
.append(2)
.append(",\"data\":")
.append(jsonArray)
.append("}");
System.out.println(responseString.toString()); // 调用BaseAction中的方法向输出流中写JSON串 responseWriterjson(responseString.toString()); /**
{
"total": 2,
"data": [{
"age": 20,
"birthday": "1990-10-09",
"hasgirlfirend": false,
"like": ["篮球", "足球"],
"name": "张三1"
}, {
"age": 20,
"birthday": "1990-10-09",
"hasgirlfirend": false,
"like": ["篮球", "足球"],
"name": "张三"
}]
} */
}
}
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