复杂json格式转化为javabean
2024-08-28 02:53:09
工具阿里巴巴的fastjson包
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.47</version>
</dependency>
场景:json格式为两层,第一层为数组,第二层object+数组
例:
[
{
"id": "user_list",
"key": "id",
"tableName": "用户列表",
"className": "cn.dmego.domain.User",
"column": [
{
"key": "rowIndex",
"header": "序号",
"width": "50",
"allowSort": "false"
},
{
"key": "id",
"header": "id",
"hidden": "true"
},
{
"key": "name",
"header": "姓名",
"width": "100",
"allowSort": "true"
}
]
},
{
"id": "role_list",
"key": "id",
"tableName": "角色列表",
"className": "cn.dmego.domain.Role",
"column": [
{
"key": "rowIndex",
"header": "序号",
"width": "50",
"allowSort": "false"
},
{
"key": "id",
"header": "id",
"hidden": "true"
},
{
"key": "name",
"header": "名称",
"width": "100",
"allowSort": "true"
}
]
}
] 首先定义javabean,由内而外
内层javabean类
package bao; public class Column { String key;
String header;
String width;
boolean allowSort;
boolean hidden; public String getKey() {
return key;
} public void setKey(String key) {
this.key = key;
} public String getHeader() {
return header;
} public void setHeader(String header) {
this.header = header;
} public String getWidth() {
return width;
} public void setWidth(String width) {
this.width = width;
} public boolean getAllowSort() {
return allowSort;
} public void setAllowSort(boolean allowSort) {
this.allowSort = allowSort;
} public boolean getHidden() {
return hidden;
} public void setHidden(boolean hidden) {
this.hidden = hidden;
} @Override
public String toString() {
return "Column [key=" + key + ", header=" + header + ", width=" + width + ", allowSort=" + allowSort
+ ", hidden=" + hidden + "]";
} }
外层javabean类
package com.imply.json; import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List; public class Query { String id;
String key;
String tableName;
String className;
private List<Column> column ; public String getId() {
return id;
} public void setId(String id) {
this.id = id;
} public String getKey() {
return key;
} public void setKey(String key) {
this.key = key;
} public String getTableName() {
return tableName;
} public void setTableName(String tableName) {
this.tableName = tableName;
} public String getClassName() {
return className;
} public void setClassName(String className) {
this.className = className;
} public List<Column> getColumn() {
return column;
} public void setColumn(List<Column> column) {
this.column = column;
} @Override
public String toString() {
return "Query [id=" + id + ", key=" + key + ", tableName=" + tableName + ", className=" + className
+ ", columns=" + column + "]";
} }
验证类
package com.imply.json; import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.List;
import java.util.Map; import com.alibaba.fastjson.JSON; public class Tdef { public static void main(String[] args) {
String str = "[{\"id\":\"user_list\",\"key\":\"id\",\"tableName\":\"用户列表\",\"className\":\"cn.dmego.domain.User\",\"column\":[{\"key\":\"rowIndex\",\"header\":\"序号\",\"width\":\"50\",\"allowSort\":\"false\"},{\"key\":\"id\",\"header\":\"id\",\"hidden\":\"true\"},{\"key\":\"name\",\"header\":\"姓名\",\"width\":\"100\",\"allowSort\":\"true\"}]},{\"id\":\"role_list\",\"key\":\"id\",\"tableName\":\"角色列表\",\"className\":\"cn.dmego.domain.Role\",\"column\":[{\"key\":\"rowIndex\",\"header\":\"序号\",\"width\":\"50\",\"allowSort\":\"false\"},{\"key\":\"id\",\"header\":\"id\",\"hidden\":\"true\"},{\"key\":\"name\",\"header\":\"名称\",\"width\":\"100\",\"allowSort\":\"true\"}]}]";
List<Query> queries = JSON.parseArray(str, Query.class); System.out.println();
queries.stream().forEach(x->{
System.out.print(x.getId());
System.out.print(x.getKey());
System.out.print(x.getTableName());
System.out.print(x.getClassName()); x.getColumn().stream().forEach(y->{
System.out.print(y.getKey());
System.out.print(y.getHeader());
System.out.print(y.getWidth());
});
System.out.println();
}); } }
运行结果:
user_listid用户列表cn.dmego.domain.UserrowIndex序号50ididnullname姓名100
role_listid角色列表cn.dmego.domain.RolerowIndex序号50ididnullname名称100
2019年4月9日 17:11:36
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