【Spring Boot】请求参数传json对象，后端采用（map）CRUD案例（101）

请求参数传json对象，后端采用（map）接收的前提条件：

1.Spring Boot 的Controller接受参数采用：@RequestBody
2.需要一个Json工具类，将json数据转成Map；

工具类：Json转Map

import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.beanutils.PropertyUtils;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;/*** 。* (1) 使用泛型方法：把json字符串转换为相应的JavaBean对象；*     转换为普通JavaBean：readValue(json,Student.class)；* (2) List Map转换List 对象：如List<Student>,将第二个参数传递为Student；* (3) List 对象转换List Map：*     [].class.然后使用Arrays.asList();方法把得到的数组转换为特定类型的List；** @param jsonStr* @param valueType* @return* */public final class JsonUtils {private static ObjectMapper objectMapper;/*** (1) 使用泛型方法：把json字符串转换为相应的JavaBean对象；*     转换为普通JavaBean：readValue(json,Student.class)；*/public static <T> T readValue(String jsonStr, Class<T> valueType) throws Exception {if (objectMapper == null) {objectMapper = new ObjectMapper();}return objectMapper.readValue(jsonStr, valueType);}/***(2).List Map转换List 对象：如List<Student>,将第二个参数传递为Student对象；*    map转换为bean*/public static Object mapToObject(Map<String, String> map, Class<?> beanClass) throws Exception {if (map == null)return null;Object obj = beanClass.newInstance();BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();for (PropertyDescriptor property : propertyDescriptors) {Method setter = property.getWriteMethod();if (setter != null) {setter.invoke(obj, map.get(property.getName()));}}return obj;}/***(3).List 对象转换List Map：*    [].class.然后使用Arrays.asList();方法把得到的数组转换为特定类型的List；*    bean转换为map*/public static <T> List<Map<String, Object>> listConvert(List<T> list){List<Map<String, Object>> list_map = new ArrayList<Map<String, Object>>();if (CollectionUtils.isNotEmpty(list)) {list.forEach(item ->{Map<String, Object> map = null;try {map = PropertyUtils.describe(item);} catch (IllegalAccessException e) {throw new RuntimeException(e);} catch (InvocationTargetException e) {throw new RuntimeException(e);} catch (NoSuchMethodException e) {throw new RuntimeException(e);}list_map.add(map);});}return list_map;}
}

Controller类：@RequestBody
备注：为了便于测试：Controller类只写了一个接口（实际开发可不要这样写噢）

** 请求参数传递json数据：json对象（map）**/@PostMapping(value = "/addTest")@AuthInterceptor("mg:get:addTest")public Result addTest(@RequestBody String param) {try {Map<String, Object> paramMap = JsonUtils.readValue(param, Map.class);return xxxListService.addTest(paramMap);} catch (Exception e) {log.error("Controller addTest is error===:" + e.getMessage(), e);return Result.failure("测试成功");}}

Service类：

	Result addTest(Map<String, Object> paramMap);

ServiceImpl类：

@Overridepublic Result addTest(Map<String, Object> paramMap) {List<Map<String, Object>> res = new ArrayList<>();String interfaceType = String.valueOf(paramMap.get("interfaceType"));if(interfaceType.equals("add")){xxxListMapper.addTest(paramMap);}else if(interfaceType.equals("del")){xxxListMapper.delTest(paramMap);}else if(interfaceType.equals("modify")){xxxListMapper.modifyTest(paramMap);}else if(interfaceType.equals("sel")){res = xxxListMapper.selTest(paramMap);}return Result.success().result(res);}

Mapper类：

//新增void addTest(Map<String, Object> paramMap);//删除void delTest(Map<String, Object> paramMap);//修改void modifyTest(Map<String, Object> paramMap);//查询List<Map<String, Object>> selTest(Map<String, Object> paramMap);

Mapper.xml类

<!-- 新增 --><insert id="addTest" parameterType="map">INSERT IGNORE INTO xxx_other_list_dic(dicNameFirst,dicValueFirst,dicNameSecond,dicValueSecond,dicType,isEnable)VALUES(#{dicNameFirst},#{dicValueFirst},#{dicNameSecond},#{dicValueSecond},#{dicType},#{isEnable})</insert><!-- 删除 --><select id="delTest" parameterType="map">deleteFROM xxx_other_list_dic where<if test = "null != seqId and '' != seqId">seqId = #{seqId}</if></select><!-- 修改 --><update id="modifyTest" parameterType="map">update xxx_other_list_dic<set><if test = "null != sortId and '' != sortId">sortId = #{sortId},</if><if test = "null != isEnable and '' != isEnable">isEnable = #{isEnable}</if></set>where<if test = "null != seqId and '' != seqId">seqId = #{seqId}</if></update><!-- 查询 --><select id="selTest" parameterType="map" resultType="map">SELECT *FROM xxx_other_list_dic where 1 = 1<if test="null != dicNameFirst and '' != dicNameFirst">and dicNameFirst = #{dicNameFirst}</if><if test="null != dicValueFirst and '' != dicValueFirst">and dicValueFirst = #{dicValueFirst}</if><if test="null != dicNameSecond and '' != dicNameSecond">and dicNameSecond = #{dicNameSecond}</if><if test="null != dicValueSecond and '' != dicValueSecond">and dicValueSecond = #{dicValueSecond}</if><if test="null != dicType and '' != dicType">and dicType = #{dicType}</if><if test="null != isEnable and '' != isEnable">and isEnable = #{isEnable}</if>order by sortId</select>

Postman 接口测试:
新增：


修改：


查询：

删除：