json格式的解析，list如何转换json格式

list转换成json，然后在js里获取：

基本格式：

controller里：

JSONObject json = new JSONObject();

json.put("data", weirFlowService.queryWeirFlow(null));

response.setCharacterEncoding("utf-8");

response.setContentType("text/html; charset=utf-8");

PrintWriter out = response.getWriter();

json.put("status", "1");

json.put("info", "查询成功!");

out.write(json.toString());

js里：

function getflowdata(stcd) {

$.ajax({

url : "getflowdata.do",

type : "post",

data:{stcd:stcd},

dataType : "json",

success : function(result) {

var data = result.data; 或
var allchart = JSON.parse(result).data;

eg1

js:

//渗流量数据

function getflowdata(stcd) {

$.ajax({

url : "getflowdata.do",

type : "post",

data:{stcd:stcd},

dataType : "json",

success : function(result) {

if (result && result.data) {

var html = [];var DELETE;

var data = result.data;

html.push('<table class="gridcss" id="realFlow" style="width:100%;">');

html.push('<caption>渗流量数据管理</caption>');

html.push('<thead>');

html.push('<tr style="bgcolor:green"><th style="display:none;"><span >ID</span></th><th><span style="font-weight:bold;color:#000000;">所属水库或河流</span></th><th><span style="font-weight:bold;color:#000000;">测站编码</span></th><th><span
style="font-weight:bold;color:#000000;">测站名称</span></th><th><span style="font-weight:bold;color:#000000;">监测时间</span></th><th><span style="font-weight:bold;color:#000000;">量水堰水位</span></th><th><span style="font-weight:bold;color:#000000;">水位趋势</span></th><th><span
style="font-weight:bold;color:#000000;">监测渗流量(mm)</span></th><th><span style="font-weight:bold;color:#000000;">累计渗流量(mm)</span></th><th><span style="font-weight:bold;color:#000000;">压力光栅波长(mm)</span></th><th><span style="font-weight:bold;color:#000000;">温补光栅波长(mm)</span></th><th><span
style="font-weight:bold;color:#000000;">备注</span></th><th><span style="font-weight:bold;color:#000000;">操作</span></th></tr>');

html.push('</thead>');

for (var i = 0; i < data.length; i++) {

year=data[i].tm.year-100;month=data[i].tm.month+1;date=data[i].tm.date;

hours=data[i].tm.hours;minutes=data[i].tm.minutes;second=data[i].tm.seconds;nanos=data[i].tm.nanos;

html.push('<tr>');

html.push('<td style="display:none;">');

html.push(data[i].id);

html.push('</td><td>');

html.push(data[i].rsvrcd);

html.push('</td><td>');

html.push(data[i].stcd);

html.push('</td><td>');

html.push(data[i].stnm);

html.push('</td><td>');

html.push("20"+year+"-"+(month==0?"00":(month<10?"0"+month:month))+"-"+(date==0?"--":(date<10?"0"+date:date))+" "+(hours==0?"00":(hours<10?"0"+hours:hours))+":"+(minutes==0?"00":(minutes<10?"0"+minutes:minutes))+":"+(second==0?"00":(second<10?"0"+second:second)));

//html.push(data[i]['tm'].toString());

html.push('</td><td>');

html.push(data[i].rz);

html.push('</td><td>');

html.push(data[i].direct);

html.push('</td><td>');

html.push(data[i].weir_flow);

html.push('</td><td>');

html.push(data[i].total_flow);

html.push('</td><td >');

html.push(data[i].wavelength1);

html.push('</td><td >');

html.push(data[i].wavelength2);

html.push('</td><td >');

html.push(data[i].remark);

html.push('</td><td align="center">');

html.push('<div style="width: 140px;">');

html.push('<div class="btns edit_btns" style="float: left;" model="edit" title="修改菜单" onclick="edit_lineflow(this);"></div>');

html.push('<div class="btns del_btns" style="float:right" model="delete" title="删除菜单" onclick="delete_lineflow(this);"></div>');

html.push('</div>');

html.push('</td>');

html.push('</tr>');

}

html.push('</table>');

$("#mains1").html(html.join(""));

Paging.setTableColor("realFlow");

}

}

});

}

controller:

// 加载渗流量数据管理

@RequestMapping(value = "getflowdata")

public void getflowdata(HttpServletRequest request,

HttpServletResponse response) {

Map<String, Object> queryParams = new HashMap<String, Object>();

String stcd = EncodeFilter.encode(request.getParameter("stcd"));

JSONObject json = new JSONObject();

if (stcd.equals("quanbu")) {

json.put("data", weirFlowService.queryWeirFlow(null));

} else {

queryParams.put("stcd", stcd);

json.put("data", weirFlowService.queryWeirFlow(queryParams));

}

try {

response.setCharacterEncoding("utf-8");

response.setContentType("text/html; charset=utf-8");

PrintWriter out = response.getWriter();

json.put("status", "1");

json.put("info", "查询成功!");

out.write(json.toString());

} catch (IOException e) {

logger.error(e.getLocalizedMessage());

}

return; //没有返回值

}

eg2.

/**

* 加载监测项目

*/

function loadItemInfo() {

$("#stationType").empty();

$.ajax({

url : appPath + "/queryitems.do",

dataType : "json",

success : function(result) {

var data = result.data;

for (var i = 0; i < data.length; i++) {

if (data[i].item_id != "displsmt") {

$("#stationType").append('<option value="'

+ data[i].item_id + '">' + data[i].item_name

+ '</option>');

}

}

var itemId = $("#stationType").val();

loadStationId(itemId);

}

});

}

// 水情统计报表监测项目查询

@RequestMapping(value = "queryitems")

public void queryitems(

HttpServletRequest request, HttpServletResponse response

) {

JSONObject json = new JSONObject();

json.put("data", itemsService.queryItems(null));

try {

response.setCharacterEncoding("utf-8");

response.setContentType("text/html; charset=utf-8");

PrintWriter out = response.getWriter();

json.put("status", "1");

json.put("info", "查询成功!");

out.write(json.toString());

} catch (IOException e) {

logger.error(e.getLocalizedMessage());

}

return ;

}

eg3.

function getrainchart(btn){//把图形函数放在ajax函数里，使用它的获取值

var data2=new Array() ;var data3 = new Array();var data1 =new Array()

var data11 =[] ;var data22 =new Array() ;//把ajax里定义的变量赋给全局变量（ajax不好写全局变量）

var data33 = [];var times=new Array();

var years=new Array();var months=new Array();var dates=new Array();var hours=new Array();var minutes=new Array();var seconds=new Array();var nanos=new Array();

var stcd1=$(btn).parent().parent().children("td").eq(0).find("select").val();

var tmbegin1=$(btn).parent().parent().children("td").eq(1).find("input").val();

var tmend1=$(btn).parent().parent().children("td").eq(2).find("input").val();

// var stcd=$("#stationId").val();

var stcd="";

var tmbegin=$("#tmbegin").val();

var tmend=$("#tmend").val();

var data = {

stcd:stcd,

};

var itemId=$("#stationType").val();

var url = "";var name="";var kk="";

if (itemId == "PP") {

url = "rainsspic.do";

name="降雨实时图(单位:mm)";

kk="实时雨量";

} else if (itemId == "ZZ") {

url = "watersspic.do";

name="水位实时图(单位:m)";

kk="实时水位";

} else if (itemId == "BB") {

url = "evapsspic.do";

name="蒸发实时图(单位:mm)";

kk="实时蒸发";

} else if (itemId == "TP") {

url = "tempsspic.do";

name="气温实时图(单位:℃)";

kk="实时气温";

} else if (itemId == "RZ") {

url = "levelsspic.do";

name="渗压计水位实时图(单位:m)";

kk="实时渗压计水位";

} else if (itemId == "WF") {

url = "flowsspic.do";

name="渗流量实时图(单位:m3)";

kk="实时渗流量";

} else {

return;

}

$.ajax({

type : "post",

data:data,

url : url,

async: false,

success : function(msg) {

var allchart = JSON.parse(msg).data;

for (var i = 0; i < allchart.length; i++) {

if (itemId == "PP") {

years[i] = "2"+allchart[i].tm.year-100;

months[i] = allchart[i].tm.month + 1 < 10 ? "0" + (allchart[i].tm.month + 1) : allchart[i].tm.month + 1;

dates[i] = allchart[i].tm.date < 10 ? "0" + (allchart[i].tm.date) : allchart[i].tm.date;

hours[i] = allchart[i].tm.hours < 10 ? "0" + (allchart[i].tm.hours) : allchart[i].tm.hours;

minutes[i] = allchart[i].tm.minutes < 10 ? "0" + (allchart[i].tm.minutes) : allchart[i].tm.minutes;

seconds[i] = allchart[i].tm.seconds < 10 ? "0" + (allchart[i].tm.seconds) : allchart[i].tm.seconds;

times[i]=years[i]+"-"+months[i]+"-"+dates[i]+" "+hours[i]+":"+minutes[i]+":"+seconds[i];

data1.push(allchart[i].stcd);

data22[i]=(allchart[i].rain);

data33.push(allchart[i].tm);

data2[i]=data22[i] ;

data3[i]=data33[i]

} else if (itemId == "ZZ") {

// 加载渗流量数据管理图表

@RequestMapping(value = "weirflowmnpic")

public void weirflowmnpic(HttpServletRequest request,

HttpServletResponse response) {

Map<String, Object> queryParams = new HashMap<String, Object>();

Map<String, Object> queryParams1 = new HashMap<String, Object>();

String stcd = EncodeFilter.encode(request.getParameter("stcd"));

String tmend1 = EncodeFilter.encode(request.getParameter("tmend"));

String tmbegin1 = EncodeFilter.encode(request.getParameter("tmbegin"));

DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

// 默认取最近四周的时间

Calendar cal = Calendar.getInstance();

java.util.Date tmbegin2 = cal.getTime();

java.sql.Timestamp tmbegin = null;

if (!isNull(tmbegin1)) {

try {

tmbegin2 = (java.util.Date) sdf.parse(tmbegin1);

tmbegin = new java.sql.Timestamp(tmbegin2.getTime());

} catch (ParseException e) {

e.printStackTrace();

}

}

java.util.Date tmend2 = cal.getTime();

java.sql.Timestamp tmend = null;

if (!isNull(tmend1)) {

try {

tmend2 = (java.util.Date) sdf.parse(tmend1);

tmend = new java.sql.Timestamp(tmend2.getTime());

} catch (ParseException e) {

e.printStackTrace();

}

}

String nowtime2 = sdf.format(cal.getTime());

cal.add(Calendar.WEEK_OF_YEAR, -4);

String nowtime1 = sdf.format(cal.getTime());

if (!isNull(tmbegin1)) {

queryParams.put("tmbegin", tmbegin1);

} else {

queryParams.put("tmbegin", nowtime1);

}

if (!isNull(tmend1)) {

queryParams.put("tmend", tmend1);

} else {

queryParams.put("tmend", nowtime2);

}

JSONObject json = new JSONObject();

List<Stations> listrainstcd = weirFlowService

.queryStationsweirflow(null);

json.put("legend", weirFlowService.queryStationsweirflow(null));

if (stcd.equals("quanbu")) {

stcd = "";

}

List<Map<String, Object>> list = weirFlowService.weirflowmnpic(stcd,

(String) queryParams.get("tmbegin"),

(String) queryParams.get("tmend"));

JSONArray jsonArr = new JSONArray();

Map<String, EcharsData> jsonMap = new HashMap<String, EcharsData>();

for (Map<String, Object> map : list) {

String jstcd = (String) map.get("stcd");

String jtm = (String) map.get("tm");

Double weirflow = (Double) map.get("weir_flow");

BigDecimal jweirflow = new BigDecimal(weirflow);

if (jsonMap.containsKey(jstcd)) {

EcharsData edata = jsonMap.get(jstcd);

edata.getTmlist().add(jtm);

edata.getRainlist().add(jweirflow);

} else {

EcharsData edata = new EcharsData();

edata.setStcd(jstcd);

edata.getTmlist().add(jtm);

edata.getRainlist().add(jweirflow);

jsonMap.put(jstcd, edata);

}

}

Iterator it = jsonMap.entrySet().iterator();

while (it.hasNext()) {

Map.Entry entry = (Map.Entry) it.next();

String jstcd = (String) entry.getKey();

EcharsData edata = (EcharsData) entry.getValue();

JSONObject jsonObj = new JSONObject();

jsonObj.put("name", jstcd);

jsonObj.put("type", "bar");

jsonObj.put("barMinHeight", 10);

jsonObj.put("tm", edata.getTmlist().toArray());

jsonObj.put("barMaxWidth", 40);

jsonObj.put("data", edata.getRainlist().toArray());

if (json.get("tmdata") == null) {

json.put("tmdata", edata.getTmlist().toArray());

}

jsonArr.add(jsonObj);

}

json.put("data", jsonArr);

try {

response.setCharacterEncoding("utf-8");

response.setContentType("text/html; charset=utf-8");

PrintWriter out = response.getWriter();

json.put("status", "1");

json.put("info", "查询成功!");

out.write(json.toString());

} catch (IOException e) {

logger.error(e.getLocalizedMessage());

}

SimpleDateFormat sdfg = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

return;

}

从接口里获取数据：

String urlneilao="http://192.168.1.15:8080/pingshan-service/data/Query1?sttp=NL";

String dataneilao=result(urlneilao);//这个接口的方法是返回string类型的数据

int indexdaoneilao=dataneilao.indexOf("{");

String resultdaoneilao=dataneilao.substring(indexdaoneilao);

String resultdaoneilao2=resultdaoneilao.replace(")","");

// 得到一个json对象

JSONObject jsObjneilao = JSONObject.fromObject(resultdaoneilao2);

JSONArray jsonArrayneilao = jsObjneilao.getJSONArray("data");

HashMap queryParams = new HashMap();

queryParams.put("neilao", jsonArrayneilao);

根据接口地址获取数据通用方法：

public String result(String urls) {

String url = urls;

// 地址对象

URL webUrl = null;

try {

webUrl = new URL(url);

} catch (MalformedURLException e) {

e.printStackTrace();

}

// 建立远程连接

HttpURLConnection conn = null;

try {

conn = (HttpURLConnection) webUrl.openConnection();

} catch (IOException e) {

e.printStackTrace();

}

// 得到输入流

InputStream ins = null;

try {

ins = conn.getInputStream();

} catch (IOException e) {

e.printStackTrace();

}

// 字符读取流

BufferedReader bfr = null;

try {

bfr = new BufferedReader(new InputStreamReader(ins,

"UTF-8"));

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

}

// 使用字符串构造器，将读取的每一行数据拼接起来

StringBuffer sb = new StringBuffer();

String content = null;

try {

while ((content = bfr.readLine()) != null) {

sb.append(content);

}

} catch (IOException e) {

e.printStackTrace();

}

// 关闭字符流

try {

bfr.close();

} catch (IOException e) {

e.printStackTrace();

}

// 释放连接

conn.disconnect();

// 得到返回的字符串

String data = sb.toString();

return data;

}

下面是一些接口：

/**

* 查询测站点的实时数据

*

* @param sttp

* @param stcd

* @param request

* @param response

* @return

*/

@RequestMapping("/data/Query")

@ResponseBody

public String
queryData(@RequestParam(value = "sttp") String sttp,

@RequestParam(value = "stcd", required = false) String stcd,

HttpServletRequest request, HttpServletResponse response) {

log.info("query data, receive http request from " + request.getRemoteAddr());

if (dataQueryJDBCTemplate == null) {

dataQueryJDBCTemplate = (DataQueryJDBCTemplate) PingshanApp.context.getBean("dataQueryJDBCTemplate");

}

//Map json = new HashMap();

JSONObject json = new JSONObject();

try {

/*DataQueryJDBCTemplate dataQueryJDBCTemplate = (DataQueryJDBCTemplate) PingshanApp.context

.getBean("dataQueryJDBCTemplate");*/

List<Map<String, Object>> list = null;

switch (sttp) {

case "ZZ":

list = new ArrayList<Map<String, Object>>();

Set<String> stnmSet = new HashSet<String>();

// 如果坪山新区和市水务局都有监测的站点，以坪山新区的数据为准

for (Map<String, Object> map : dataQueryJDBCTemplate.queryWaterLevel(stcd)) {

String stnm = map.get("stnm").toString();

if (!stnmSet.contains(stnm)) {

list.add(map);

stnmSet.add(stnm);

}

}

break;

case "NL":

list = dataQueryJDBCTemplate.queryNeilaodian(stcd);

break;

case "PP":

list = dataQueryJDBCTemplate.queryRain(stcd);

break;

case "BB":

list = dataQueryJDBCTemplate.queryEvap(stcd);

break;

case "TP":

list = dataQueryJDBCTemplate.queryTemper(stcd);

break;

case "RZ":

list = dataQueryJDBCTemplate.queryOsmodata(stcd);

break;

case "WF":

list = dataQueryJDBCTemplate.queryWeirflow(stcd);

break;

case "ALL":

list = dataQueryJDBCTemplate.queryAllStation(stcd);

break;

}

json.put("data", list);

json.put("status", "1");

json.put("info", "查询成功!");

} catch (Exception e) {

e.printStackTrace();

json.put("status", "0");

json.put("info", "查询失败!");

}

log.info("end query data.");

/*try {

response.setCharacterEncoding("utf-8");

response.setContentType("text/html; charset=utf-8");

PrintWriter out = response.getWriter();

out.write("\""+json.toString()+"\"");

} catch (IOException e) {

log.error(e.getLocalizedMessage());

}*/

return json.toString(); //返回string 类型的的数据

//return "{\"data\":[{\"stcd\":\"P1002\",\"tm\":\"2015-12-14 10:20:00\",\"z\":23.000},{\"stcd\":\"RR011\",\"tm\":\"2015-11-14 00:12:12\",\"z\":15.000}],\"status\":\"1\",\"info\":\"查询成功!\"}";

}

/**

* 查询河道信息

* @param stcd

* @param request

* @param response

* @return

*/

@RequestMapping("/data/queryReservoir")

@ResponseBody

public Object queryReservoir(@RequestParam(value = "stcd", required = false) String stcd) {

JSONObject json = new JSONObject();

try {

List<Map<String, Object>> list = dataQueryJDBCTemplate.queryReservoir(stcd);

json.put("data", list);

json.put("status", "1");

json.put("info", "查询成功!");

} catch (Exception e) {

e.printStackTrace();

json.put("status", "0");

json.put("info", "查询失败!");

}

log.info("end query data.");

return json;

}

/**

* 查询河道信息

* @param stcd

* @param request

* @param response

* @return

*/

@RequestMapping("/data/queryRiver")

@ResponseBody

public Object queryRiver(@RequestParam(value = "stcd", required = false) String stcd) {

JSONObject json = new JSONObject();

try {

List<Map<String, Object>> list = dataQueryJDBCTemplate.queryRiver(stcd);

json.put("data", list);

json.put("status", "1");

json.put("info", "查询成功!");

} catch (Exception e) {

e.printStackTrace();

json.put("status", "0");

json.put("info", "查询失败!");

}

log.info("end query data.");

return json;

}

/**

* 查询河道信息

* @param stcd

* @param request

* @param response

* @return

*/

@RequestMapping("/data/queryStation")

@ResponseBody

public Object
queryStation(@RequestParam(value = "stcd", required = false) String stcd) {

JSONObject json = new JSONObject();

try {

List<Map<String, Object>> list = dataQueryJDBCTemplate.queryStation(stcd);

json.put("data", list);

json.put("status", "1");

json.put("info", "查询成功!");

} catch (Exception e) {

e.printStackTrace();

json.put("status", "0");

json.put("info", "查询失败!");

}

log.info("end query data.");

return json; //返回json 类型的的数据

}