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springmvc+jquery+json

2016-01-20 00:00 671 查看

摘要: springmvc和json的使用

前提是搭建好了是springmvc的环境和引入jquery

//这是jsp的代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>主页</title>
<script type="text/javascript" src="/<%=request.getContextPath()%>/js/jquery-2.0.3.min.js"></script>
</head>
<body>
this is a json.jsp!
<hr>
<a href="/springmvc/spring/spring/getChildren">jsontest</a>
<input type="submit" onclick="jsontest()" value="json" >
<script type="text/javascript">
function jsontest(){
$.ajax( {
type : "get",
url : "<%=request.getContextPath()%>/spring/spring/getChildren",
dataType: "json",
success : function(data) {
alert("1:"+data[0].name);
//jauery循环输出json数据
$.each(data,function(idx,item){
//输出
alert(item.name+"哈哈"+item.age);
})
},
error :function(){
alert("2:网络连接出错！");
}
});
}
</script>
</body>
</html><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>主页</title>
<script type="text/javascript" src="/springmvc/js/jquery-2.0.3.min.js"></script>
</head>
<body>
this is a json.jsp!
<hr>
<a href="/springmvc/spring/spring/getChildren">jsontest</a>
<input type="submit" onclick="jsontest()" value="json" >
<hr>
<textarea id="jsonv" rows="10" cols="100"></textarea>
<script type="text/javascript">
function jsontest(){
$.ajax( {
type : "get",
url : "<%=request.getContextPath()%>/spring/spring/getChildren",
dataType: "json",
success : function(data) {
//jauery循环输出json数据
$.each(data,function(idx,item){
//输出
var temp=$("#jsonv").val();
$("#jsonv").val(temp+","+item.name+":"+item.age);
})
},
error :function(){
alert("2:网络连接出错！");
}
});
}
</script>
</body>
</html>

//这是controller的json数据传输
@RequestMapping("getChildren")
public @ResponseBody String getChildren(Long objectId) throws Exception {
List<Person> trees = new ArrayList<Person>();
for(int i=1;i<9;i++){
Person per=new Person("jack"+i,"1"+i);
trees.add(per);
}
return parseJsonTree(trees);
}

private String parseJsonTree(List<Person> trees) {
StringBuilder children = new StringBuilder(140 * trees.size());
children.append("[");
int i=0;
Gson gson = new GsonBuilder().create();//com.google.gson.Gson
for ( Person tree : trees) {
if(i>0){
children.append(",");
}
children.append(gson.toJson(tree));
i++;
}
children.append("]");
return children.toString();
}

结果：jack1:11,jack2:12,jack3:13,jack4:14,jack5:15,jack6:16,jack7:17,jack8:18

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