mybatis实现 主从表 left join 1:n 一对多 分页查询 主表从表都有查询条件+count
需求：
========================================
1.主从表数据 是 1：m
2.主从表各自都有查询条件
3.最后查询结果 需要分页，并统计总数
注意：
=======================================
1.查询的分页，必须在数据库做，否则分页没有意义
解决方法：
注意 下面的入参中 [第一页的10条]
pageNum=0 PageSize=10
实际入参应该是处理过的
pageNum = pageNum*10
pageSize = 10
##############################有对应实体接收查询结果的情况下################################
1.mapper.xml应该这么写
<resultMap type="com.lsrsjava.daywork.domain.week.自定义Bean" id="myResultMap">
<id column="id" property="id"/>
<!--一堆的主表 属性-->
<result column="userId" property="userId"/>
<result column="userName" property="userName"/>
<result column="userImg" property="userImg"/> <!--子表对应的属性 封装在list中 即接收了 主表对子表的 1:N -->
<collection property="listData" javaType="com.lsrsjava.daywork.domain.week.子表Bean" columnPrefix="slaveTable_">
<id column="id" property="id"/>
<result column="rowId" property="rowId"/>
<result column="colName" property="colName"/>
<result column="val" property="val"/>
</collection>
</resultMap> <select id="pageFind" resultMap="myResultMap" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean"> SELECT
base.id,
t.id slaveTable_id,
t.row_id slaveTable_rowId,
t.col_name slaveTable_colName,
t.val slaveTable_val
FROM
(
SELECT
*
FROM
worksheet_data_${dataId}
WHERE
-- 此处之后加 主表的 where查询条件拼接 LIMIT #{pageNum}, #{pageSize}
) base
LEFT JOIN
worksheet_data_table_data t
ON
base.id = t.row_id
WHERE
<!-- 此处之后加 子表单的 where查询拼接 -->
</select>
2.mapper.java应该这么写
List<自定义的Bean> pageFind(WorksheetDataSaveBean queryBean);
############################### 不确定返回字段类型[即表中属性是动态的，没有对应实体的情况下]###################################
1.mapper.xml中应该这么写
[下面的示例中：因为我不确定返回的字段，所以用HashMap直接接收查询结果后 自己处理的结果集]
<select id="pageFind" resultType="java.util.HashMap" parameterType="com.lsrjava.daywork.api.beans.WorksheetDataSaveBean">
SELECT
base.*,
t.id slaveTable_id,
t.row_id slaveTable_rowId,
t.col_name slaveTable_colName,
t.val slaveTable_val
FROM
(
SELECT
*
FROM
worksheet_data_${dataId}
WHERE
-- 此处之后加 主表的 where查询条件拼接
LIMIT #{pageNum}, #{pageSize}
) base
LEFT JOIN
worksheet_data_table_data t
ON
base.id = t.row_id
WHERE
<!-- 此处之后加 子表单的 where查询拼接 -->
</select>
2.mapper.java应该这么写
List<Map<String,String>> pageFind(WorksheetDataSaveBean queryBean);
===================================count=============================================
count 是什么？count就是页面的 总共total条数
1.mapper.xml应该这么写
<select id="count" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean" resultType="java.lang.Long">
SELECT
count( DISTINCT base.id ) count
FROM
worksheet_data_${dataId} base
LEFT JOIN
worksheet_data_table_data c
ON
c.row_id = base.id
-- 拼接条件的地方 </select>
2.mapper.java应该这么写
Long count(WorksheetDataSaveBean queryBean);
====================================附录，完整的 分页+left join+count+不确认返回列+Map接收+mybatis标签嵌套+json字段查询+字符串转日期+字符串转数值+结果集封装处理========================================
需求：
1.数据表 列是动态的多列，因此不确定查询返回是哪些列【因此使用Map接收】
2.主表一行 关联 子表的多行 【因此需要left join】
3.对于主表和子表的所有列，需要提供查询功能【因此需要使用mybatis标签拼接查询条件】
4.主表是正常数据，子表是JSON数据存储【因此需要提供有关JSON字段查询处理的操作】
5.查询出的List<Map>结果集 size=主size*子size 【因此，结果集需要将子表数据封装进主表数据集 java处理】
6.上述结果集条数不能作为分页查询的count统计，返回总页码【因此需要额外count()查询，以返回正确的total】
代码参考：
1.Mapper.xml【一个page查询 一个count查询】
<select id="pageFind" resultType="java.util.HashMap" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean">
SELECT
base.*,
u.name create_by_name,
u2.name update_by_name,
t.id slaveTable_id,
t.row_id slaveTable_rowId,
t.col_name slaveTable_colName,
t.val slaveTable_val
FROM
(
SELECT
d.*
FROM
worksheet_data_${dataId} d
<!-- 此处之后加 主表的 where查询条件拼接 -->
<where>
<if test="list != null">
<foreach collection="list" item="item" index="index" separator="AND" open="(" close=")">
<choose>
<when test='item.cname.contains("date")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
DATE_FORMAT(${item.cname} , ${item.dateFormat} ) BETWEEN DATE_FORMAT( #{item.value}, ${item.dateFormat} ) AND DATE_FORMAT( #{item.endValue}, ${item.dateFormat} )
</when>
<otherwise>
DATE_FORMAT( ${item.cname}, ${item.dateFormat} ) = DATE_FORMAT( #{item.value}, ${item.dateFormat} )
</otherwise>
</choose>
</when>
<when test='item.cname.contains("input-number")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
CAST(${item.cname} AS DECIMAL) BETWEEN #{item.value} AND #{item.endValue}
</when>
<otherwise>
CAST(${item.cname} AS DECIMAL) = #{item.value}
</otherwise>
</choose>
</when>
<when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
FIND_IN_SET( #{v},${item.cname} )
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
FIND_IN_SET( #{v},${item.cname} )
</foreach>
</otherwise>
</choose>
</if>
</when>
<when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
<choose>
<when test='item.operator.contains("like") '>
${item.cname} -> '$[*].name' like '%${v}%'
</when>
<otherwise>
JSON_CONTAINS( ${item.cname} ->'$[*].name' , '"${v}"', '$')
</otherwise>
</choose>
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
<choose>
<when test='item.operator.contains("like") '>
${item.cname} -> '$[*].name' like '%${v}%'
</when>
<otherwise>
JSON_CONTAINS( ${item.cname} ->'$[*].name' , '"${v}"', '$')
</otherwise>
</choose>
</foreach>
</otherwise>
</choose>
</if>
</when>
<otherwise>
<choose>
<when test='item.operator.contains("like") '>
${item.cname} like '%${item.value}%'
</when>
<otherwise>
${item.cname} = #{item.value}
</otherwise>
</choose>
</otherwise>
</choose>
</foreach>
</if>
</where>
LIMIT #{pageNum}, #{pageSize}
) base
LEFT JOIN
(SELECT * from worksheet_data_table_data where data_id = #{dataId}) t
ON
base.id = t.row_id
LEFT JOIN
dept_user u
ON
base.create_by = u.id
LEFT JOIN
dept_user u2
ON
base.update_by = u2.id
<!-- 此处之后加 子表单的 where查询拼接 -->
<where>
<if test="slaveList != null">
<foreach collection="slaveList" item="item" index="index" separator="AND" open="(" close=")">
t.col_name = #{item.tableName}
AND
<choose>
<when test='item.cname.contains("date")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"') between #{item.value} AND date_add(#{item.endValue}, interval 1 day)
</when>
<otherwise>
STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"') between #{item.value} AND date_add(#{item.value}, interval 1 day)
</otherwise>
</choose>
</when>
<when test='item.cname.contains("input-number")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
CAST(val -> '$."${item.cname}"' AS DECIMAL) BETWEEN #{item.value} AND #{item.endValue}
</when>
<otherwise>
CAST(val -> '$."${item.cname}"' AS DECIMAL) = #{item.value}
</otherwise>
</choose>
</when>
<when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
val -> '$.${item.cname}' like '%,${v},%'
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
val -> '$.${item.cname}' like '%,${v},%'
</foreach>
</otherwise>
</choose>
</if>
</when>
<when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
val -> '$."${item.cname}"' like '%${v}%'
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
val -> '$."${item.cname}"' like '%${v}%'
</foreach>
</otherwise>
</choose>
</if>
</when>
<otherwise>
<choose>
<when test='item.operator.contains("like") '>
val -> '$.${item.cname}' like '%${item.value}%'
</when>
<otherwise>
JSON_CONTAINS( val ->'$.${item.cname}' , '"${item.value}"', '$')
</otherwise>
</choose>
</otherwise>
</choose>
</foreach>
</if>
</where>
</select>
<select id="count" parameterType="com.lqjava.daywork.api.beans.WorksheetDataSaveBean" resultType="java.lang.Long">
SELECT
count( DISTINCT base.id ) count
FROM
worksheet_data_${dataId} base
LEFT JOIN
(SELECT * from worksheet_data_table_data where data_id = #{dataId}) c
ON
c.row_id = base.id
<!-- 主表 + 子表 查询条件拼接 -->
<where>
<if test="list != null">
<foreach collection="list" item="item" index="index" separator="AND" open="(" close=")">
<choose>
<when test='item.cname.contains("date")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
DATE_FORMAT(${item.cname} , ${item.dateFormat} ) BETWEEN DATE_FORMAT( #{item.value}, ${item.dateFormat} ) AND DATE_FORMAT( #{item.endValue}, ${item.dateFormat} )
</when>
<otherwise>
DATE_FORMAT( ${item.cname}, ${item.dateFormat} ) = DATE_FORMAT( #{item.value}, ${item.dateFormat} )
</otherwise>
</choose>
</when>
<when test='item.cname.contains("input-number")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
CAST(${item.cname} AS DECIMAL) BETWEEN #{item.value} AND #{item.endValue}
</when>
<otherwise>
CAST(${item.cname} AS DECIMAL) = #{item.value}
</otherwise>
</choose>
</when>
<when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
FIND_IN_SET( #{v},${item.cname} )
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
FIND_IN_SET( #{v},${item.cname} )
</foreach>
</otherwise>
</choose>
</if>
</when>
<when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
<choose>
<when test='item.operator.contains("like") '>
${item.cname} -> '$[*].name' like '%${v}%'
</when>
<otherwise>
JSON_CONTAINS( ${item.cname} ->'$[*].name' , '"${v}"', '$')
</otherwise>
</choose>
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
<choose>
<when test='item.operator.contains("like") '>
${item.cname} -> '$[*].name' like '%${v}%'
</when>
<otherwise>
JSON_CONTAINS( ${item.cname} ->'$[*].name' , '"${v}"', '$')
</otherwise>
</choose>
</foreach>
</otherwise>
</choose>
</if>
</when>
<otherwise>
<choose>
<when test='item.operator.contains("like") '>
${item.cname} like '%${item.value}%'
</when>
<otherwise>
${item.cname} = #{item.value}
</otherwise>
</choose>
</otherwise>
</choose>
</foreach>
</if>
<if test="slaveList != null">
AND
<foreach collection="slaveList" item="item" index="index" separator="AND" open="(" close=")">
c.col_name = #{item.tableName}
AND
<choose>
<when test='item.cname.contains("date")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"') between #{item.value} AND date_add(#{item.endValue}, interval 1 day)
</when>
<otherwise>
STR_TO_DATE(val -> '$.${item.cname}','"%Y-%m-%d %H:%i:%s"') between #{item.value} AND date_add(#{item.value}, interval 1 day)
</otherwise>
</choose>
</when>
<when test='item.cname.contains("input-number")'>
<choose>
<when test='item.operator.contains("between") and item.endValue != null'>
CAST(val -> '$."${item.cname}"' AS DECIMAL) BETWEEN #{item.value} AND #{item.endValue}
</when>
<otherwise>
CAST(val -> '$."${item.cname}"' AS DECIMAL) = #{item.value}
</otherwise>
</choose>
</when>
<when test='item.cname.contains("checkbox") or item.cname.contains("select")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
val -> '$.${item.cname}' like '%,${v},%'
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
val -> '$.${item.cname}' like '%,${v},%'
</foreach>
</otherwise>
</choose>
</if>
</when>
<when test='item.cname.contains("dept-user") or item.cname.contains("dept-base")'>
<if test="item.valueList != null">
<choose>
<when test=' "OR".equals(item.reOperator) '>
<foreach collection="item.valueList " item="v" index="i" separator="OR" open="(" close=")">
val -> '$."${item.cname}"' like '%${v}%'
</foreach>
</when>
<otherwise>
<foreach collection="item.valueList " item="v" index="i" separator="AND" open="(" close=")">
val -> '$."${item.cname}"' like '%${v}%'
</foreach>
</otherwise>
</choose>
</if>
</when>
<otherwise>
<choose>
<when test='item.operator.contains("like") '>
val -> '$.${item.cname}' like '%${item.value}%'
</when>
<otherwise>
JSON_CONTAINS( val ->'$.${item.cname}' , '"${item.value}"', '$')
</otherwise>
</choose>
</otherwise>
</choose>
</foreach>
</if>
</where>
</select>
2.Mapper.java
List<Map<String,String>> pageFind(WorksheetDataSaveBean queryBean); Long count(WorksheetDataSaveBean queryBean);
3.入参数据结构
public class WorksheetDataSaveBean {
private Long dataId;
private Long rowId;
private List<WorksheetData> list; //入参集合
private List<WorksheetData> resultList;//结果列集合 要返回哪些列信息
private List<WorksheetData> slaveList;//子表单查询条件
private Integer pageNum = 0;
private Integer pageSize = 10;
public class WorksheetData {
public static final Integer DATE_UNIT_SECOND = 1;
public static final Integer DATE_UNIT_MINUTE = 2;
public static final Integer DATE_UNIT_HOUR = 3;
public static final Integer DATE_UNIT_DAY = 4;
public static final Integer DATE_UNIT_MONTH = 5;
public static final Integer DATE_UNIT_YEAR = 6;
public static final String RELATED_OPERATOR_AND = "AND";
public static final String RELATED_OPERATOR_OR = "OR";
private Long id;
private String cname;
private String value;
private String tableName;//子表单cname 对应的子表单列 在主表单中的列名 例如：table_0 table_1
private String operator = "equals";//操作符 [equals] / [between and] / [like] /
private String reOperator = RELATED_OPERATOR_AND;//查询条件[条件内] 关联符 AND（默认） OR 提供给select/checkbox/dept-user/dept-base使用
private String endValue;//区间操作 结束区间值 提供给date/input-number 字段使用
private Integer dateUnit = DATE_UNIT_DAY;// 按秒、分、时、天（默认）、月、年 提供给date字段查询使用
private String dateFormat;
private List<String> valueList;//对checkbox、select 提供多值查询功能
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
initValueList();
}
public String getOperator() {
return operator;
}
public void setOperator(String operator) {
this.operator = operator;
}
public String getEndValue() {
return endValue;
}
public void setEndValue(String endValue) {
this.endValue = endValue;
}
public String getTableName() {
return tableName;
}
public void setTableName(String tableName) {
this.tableName = tableName;
}
public String getReOperator() {
return reOperator;
}
public void setReOperator(String reOperator) {
this.reOperator = reOperator;
}
public Integer getDateUnit() {
return dateUnit;
}
public void setDateUnit(Integer dateUnit) {
this.dateUnit = dateUnit;
initDateFormat();
}
public String getDateFormat() {
return dateFormat;
}
public void setDateFormat(String dateFormat) {
this.dateFormat = dateFormat;
}
public List<String> getValueList() {
return valueList;
}
public void setValueList(List<String> valueList) {
this.valueList = valueList;
}
private String initDateFormat(){
dateFormat = "'%Y-%m-%d %H:%i:%S'";
switch (dateUnit){
case 1:dateFormat = "'%Y-%m-%d %H:%i:%S'";break;
case 2:dateFormat = "'%Y-%m-%d %H:%i'";break;
case 3:dateFormat = "'%Y-%m-%d %H'";break;
case 4:dateFormat = "'%Y-%m-%d'";break;
case 5:dateFormat = "'%Y-%m'";break;
case 6:dateFormat = "'%Y'";break;
default:dateFormat = "'%Y-%m-%d'";
}
return dateFormat;
}
private void initValueList(){
List<String> list = null;
if (this.cname.contains("select")
|| this.cname.contains("checkbox")
|| this.cname.contains("dept-user")
|| this.cname.contains("dept-base")){
String[] split = this.value.split(",");
list = Arrays.asList(split);
}
this.valueList = list;
}
}
4.controller
@RequestMapping(value = "/pageFindTableData",method = RequestMethod.POST,name="表单数据分页全字段查询")
public PageResultBean<Map<String, Object>> pageFindTableData(@RequestBody WorksheetDataSaveBean bean){
PageResultBean<Map<String, Object>> res = new PageResultBean<>(); Long dataId = bean.getDataId();
int pageNum = bean.getPageNum();
int pageSize = bean.getPageSize();
pageNum = pageNum * pageSize;
bean.setPageNum(pageNum); /**
* 1.表名验证 + 列名验证
*/ if (dataId != null){
String tableName = DDLCreater.TABLE_NAME+dataId;
//表名验证
String exist = mapper.checkTableExist(tableName);
if(StringUtils.isNotBlank(exist)){ //列名验证
boolean flag = true;
List<WorksheetData> paramList = bean.getList();
if (paramList != null && paramList.size() > 0){
flag = checkColName(dataId,paramList,true);
} /**
* 2.区分主表子表查询条件 + DB查询 + 组装结果集
*/
if (flag){ //主子拆分
diffSlaveList(bean); //DB查询
List<Map<String, String>> maps = tableDataMapper.pageFind(bean); //组装结果
WorksheetPageFindMap map = new WorksheetPageFindMap();
List<Map<String, Object>> result = map.dealMap(maps);
//返回
res.initTrue(result,tableDataMapper.count(bean)); }else {
res.initFalse("列名不合法");
}
}else {
res.initFalse("数据表不存在");
}
}else {
res.initFalse("必填参数缺失");
}
return res;
}
检查表是否存在的sql
<select id="checkTableExist" resultType="java.lang.String" parameterType="java.lang.String">
SELECT
table_name
FROM
information_schema.TABLES
WHERE
table_name = #{tableName};
</select>
列名检查 以及 区分主表和子表的查询条件[因为主表是正常数据，子表是JSON数据，查询方式不同，因此需要区分处理]
/**
* 列名合法性检查
* [并处理 列名 加上``符号]
*
* =======处理列名注意=======
* 只有主表单字段 需要处理列名
* 子表单查询字段 列名无需处理【json中查询 字段不能带 ``查询】
*
*
* @param dataId dataId
* @param paramList 入参列名集合
* @param includeSlaveTable 是否包含子表单列
* @return 列名是否合法
*/
private boolean checkColName(Long dataId,List<WorksheetData> paramList,boolean includeSlaveTable){ int size = paramList.size();
WorksheetColBase check = new WorksheetColBase();
check.setDataid(dataId);
check.setState(includeSlaveTable ? null: 0);
List<WorksheetColBase> byDataIdCheckList = mapper.findByDataId(check); for (WorksheetData data : paramList) {
String colName = data.getCname();
String tableName = data.getTableName(); for (WorksheetColBase worksheetColBase : byDataIdCheckList) {
if (colName.equals(worksheetColBase.getColName())){
String tableColName = worksheetColBase.getTableColName();
if (tableName == null){
if (tableName == tableColName){ //处理列名
data.setCname("`"+colName+"`"); size--;
}
}else {
if (tableName.equals(tableColName)){
size--;
}
}
}
} } return size == 0 ? true : false;
} /**
* 区分 子表单 查询条件 和 主表查询条件
* @param bean
*/
private void diffSlaveList(WorksheetDataSaveBean bean){
List<WorksheetData> list = bean.getList(); //入参查询集合
if (list != null ){
List<WorksheetData> slaveList = new ArrayList<>(); //子表单查询集合 for (int i = 0; i < list.size(); i++) {
WorksheetData data = list.get(i);
String tableName = data.getTableName();
if (tableName != null){
slaveList.add(data);
list.remove(data); i--;
}
} bean.setSlaveList(slaveList);
} }
组装数据集的工具类
public class WorksheetPageFindMap {
private Map<Long,Map<String,Object>> resultMap = new HashMap<>();
private Long rowId;//行ID
private Map<String,Object> rowMap;//行Map
private List<Map<String,String>> slaveList;//子表单List
private Map<String,String> slaveMap;//子表单Map
public List<Map<String, Object>> dealMap(List<Map<String,String>> list){
for (Map<String, String> oldMap : list) {
rowMap = new HashMap<>();
slaveMap = new HashMap<>();
Set<String> keySet = oldMap.keySet();
for (String key : keySet) {
String value = String.valueOf(oldMap.get(key));
if (key.equals("id")){
rowId = Long.valueOf(value);
init();
append(key,rowId);
}else {
if (key.contains("slaveTable_")){
dealSlaveMap(key.split("slaveTable_")[1],value);
}else {
if (key.contains("date")){
value = value.split("\\.")[0];
}
append(key,value);
}
}
}
dealSlaveList();
}
List<Map<String, Object>> resultList = new ArrayList<>();
for (Map<String, Object> stringObjectMap : resultMap.values()) {
resultList.add(stringObjectMap);
}
return resultList;
}
//初始化行方法
private void init(){
Map<String, Object> oldRowMap = resultMap.get(rowId);
if (oldRowMap != null){
List<Map<String,String>> oldSlaveList = (List) oldRowMap.get("table");
if (oldSlaveList != null){
if (rowMap.get("table") == null){
slaveList = new ArrayList<>();
}
slaveList.addAll(oldSlaveList);
append("table",slaveList);
}
}
resultMap.put(rowId,rowMap);
}
//行数据追加方法
private void append(String key,Object value){
rowMap.put(key,value);
}
//子表单集合 初始化
private void dealSlaveMap(String key,String value){
slaveMap.put(key,value);
}
//子表单List 处理
private void dealSlaveList(){
//说明有子表单数据
if (slaveMap.size() > 0 ){
slaveList = (List) rowMap.get("table");
if (slaveList == null){
slaveList = new ArrayList<>();
append("table",slaveList);
}
slaveList.add(slaveMap);
}
}
}
最后conut ，拿到total，一起返回结果即可
返回结果集
