springmv返回JSON数据格式

1.先导入依赖

<!-- springmvc使用@responseBody  start-->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.4.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.4.3</version>
</dependency>
<!-- springmvc使用@responseBody  end-->

2.Controller代码

//返回数据的json格式:  [{ id:2, pId:0, name:"系统管理", checked:true, open:true}]
@RequestMapping("/genzTreeNodes")
@ResponseBody
public List<HashMap<String, Object>> genzTreeNodes(Role role){
 
    List<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
 
    //遍历模块列表
    List<Module> moduleList = moduleService.find()//获取所有模块列表
 
    for (Module module : moduleList) {
        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("id", module.getId());
        //添加字符串
        map.put("pId", module.getParentId());
        map.put("name", module.getName());
        //添加布尔类型
        map.put("checked", true);
 
        data.add(map);
    }
    //返回数据
    return data;
}