前台js拼接json字符串传递后台
json
适用于现代 C++ 的 JSON。
项目地址:https://gitcode.com/gh_mirrors/js/json
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有时候前台传递到后台数据多了,可以在前台把数据拼接成json字符串传递到后台,后台可以在转为list对象集合,会简单很多。
前台拼接json字符串代码(这里是循环遍历获取table表格中的标签值传递,如下图表格中的数据)
表格中数据代码(部分,以为数据条数可以添加,所以这里只显示了一行的代码)
拼接表格中的所有数据为json格式字符串代码(因为json格式代码需要加 " 号,拼接时需要注意一下):
var str = "[";
$("#lesson_body").each(function(){
$(this).find('tr').each(function(){
str += '{"id":"'+$(this).find(".id").val()+'",';
str += '"startdata":"'+$(this).find(".startdata").val()+'",';
str += '"finishtime":"'+$(this).find(".finishtime").val()+'",';
str += '"curriculum1":"'+$(this).find(".curriculum").val()+'",';
str += '"teacher1":"'+$(this).find(".teacher").val()+'"},';
})
});
str = str.substring(0, str.length-1)+"]";
$.post("${pageContext.request.contextPath }/curriculumPlan/save1", {data: str, tbClassId: tbClassId}, function(data){
if(data.success){
layer.msg("保存成功",{offset:'rb'});
}else{
layer.msg("保存失败",{offset:'rb'});
}
})
后台接收为一个string类型字符串,之后转为list对象集合:
首先需要引入json依赖:
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.9</version>
</dependency>
转换代码CurriculumPlanForm为对象实体类:
ObjectMapper mapper = new ObjectMapper();
//data为字符串json数据
List<CurriculumPlanForm> list =
mapper.readValue(data,new TypeReference<List<CurriculumPlanForm>>() { });
GitHub 加速计划 / js / json
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适用于现代 C++ 的 JSON。
最近提交(Master分支:3 个月前 )
2134cb94
* change NLOHMANN_JSON_FROM_WITH_DEFAULT to let NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT work with an empty JSON instance
* fix ci_static_analysis_clang (ci_clang_tidy)
* change NLOHMANN_JSON_FROM_WITH_DEFAULT to let NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT work with an empty JSON instance 8 天前
6057b31d
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