Java JOOQ动态条件查询
大家好,我尝试创建一个方法来应用SelectQuery条件,但我不知道如何按名称获取字段或按名称获取表,代码示例 筛选条件的对象是一个数组,如下所示:Java JOOQ动态条件查询,java,sql,spring,jooq,Java,Sql,Spring,Jooq,大家好,我尝试创建一个方法来应用SelectQuery条件,但我不知道如何按名称获取字段或按名称获取表,代码示例 筛选条件的对象是一个数组,如下所示: [{'field': 'ID', 'condition' : 'in', 'value' : ['f4019bc3-d06b-4673-87e7-75bab23ac85a','c13beeef-2893-4a04-9ebf-ecdc851475bc']}] public List<Branch> find(String order,
[{'field': 'ID', 'condition' : 'in', 'value' : ['f4019bc3-d06b-4673-87e7-75bab23ac85a','c13beeef-2893-4a04-9ebf-ecdc851475bc']}]
public List<Branch> find(String order, JSONArray filters, Integer limit, Integer pageNumber) {
SelectQuery<Record6<String,Integer,String,String,String,String>> selectSentence = dsl.select(
branch.ID.as("id"),
branch.CODE.as("code"),
branch.NAME.as("name"),
enterprises.ID.as("enterprise.id"),
enterprises.NAME.as("enterprise.name"),
enterprises.NIT.as("enterprise.nit"))
.from(branch)
.leftOuterJoin(enterprises)
.on(branch.ENTERPRISE.eq(enterprises.ID)).getQuery();
if(order != null && order.startsWith("-")) {
selectSentence.addOrderBy(Tables.BRANCH.field(order.substring(1)).desc());
}else {
selectSentence.addOrderBy(Tables.BRANCH.field(order).asc());
}
addQueryConditions(filters, selectSentence);
selectSentence.addLimit(limit);
selectSentence.addOffset((pageNumber - 1) * limit);
return selectSentence.fetchInto(Branch.class);
}
@SuppressWarnings("unchecked")
private void addQueryConditions(JSONArray filters, SelectQuery<?> query) {
for (int i = 0, size = filters.length(); i < size; i++){
JSONObject filter = filters.getJSONObject(i);
String filterCondition = filter.optString("condition");
if(Comparator.EQUALS.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.EQUALS;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.GREATER.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.GREATER;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.GREATER_OR_EQUAL.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.GREATER_OR_EQUAL;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.IN.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.IN;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.LESS.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.LESS;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.LESS_OR_EQUAL.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.LESS_OR_EQUAL;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.LIKE.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.LIKE;
query.addConditions(field.compare(comparator, filter.optString("value")));
}
}
}
查询生成器方法如下所示:
[{'field': 'ID', 'condition' : 'in', 'value' : ['f4019bc3-d06b-4673-87e7-75bab23ac85a','c13beeef-2893-4a04-9ebf-ecdc851475bc']}]
public List<Branch> find(String order, JSONArray filters, Integer limit, Integer pageNumber) {
SelectQuery<Record6<String,Integer,String,String,String,String>> selectSentence = dsl.select(
branch.ID.as("id"),
branch.CODE.as("code"),
branch.NAME.as("name"),
enterprises.ID.as("enterprise.id"),
enterprises.NAME.as("enterprise.name"),
enterprises.NIT.as("enterprise.nit"))
.from(branch)
.leftOuterJoin(enterprises)
.on(branch.ENTERPRISE.eq(enterprises.ID)).getQuery();
if(order != null && order.startsWith("-")) {
selectSentence.addOrderBy(Tables.BRANCH.field(order.substring(1)).desc());
}else {
selectSentence.addOrderBy(Tables.BRANCH.field(order).asc());
}
addQueryConditions(filters, selectSentence);
selectSentence.addLimit(limit);
selectSentence.addOffset((pageNumber - 1) * limit);
return selectSentence.fetchInto(Branch.class);
}
@SuppressWarnings("unchecked")
private void addQueryConditions(JSONArray filters, SelectQuery<?> query) {
for (int i = 0, size = filters.length(); i < size; i++){
JSONObject filter = filters.getJSONObject(i);
String filterCondition = filter.optString("condition");
if(Comparator.EQUALS.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.EQUALS;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.GREATER.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.GREATER;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.GREATER_OR_EQUAL.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.GREATER_OR_EQUAL;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.IN.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.IN;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.LESS.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.LESS;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.LESS_OR_EQUAL.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.LESS_OR_EQUAL;
query.addConditions(field.compare(comparator, filter.optString("value")));
}else if(Comparator.LIKE.toSQL().equals(filterCondition)) {
Field<Object> field = (Field<Object>) query.field(filter.optString("field"));
Comparator comparator = Comparator.LIKE;
query.addConditions(field.compare(comparator, filter.optString("value")));
}
}
}
但字段总是空的
如何解决这个问题。各种方法都区分大小写。JSON结构发送此输入
[{'field':'ID',…}]
但您的列被重命名为小写的id
:
branch.ID.as(“ID”)
我用这个解决问题
public static void addQueryConditions(String filter, SelectQuery<?> query) {
JSONArray filterArray = new JSONArray(filter);
for (int i = 0, size = filterArray.length(); i < size; i++){
JSONObject filterObject = filterArray.getJSONObject(i);
String filterCondition = filterObject.optString("condition");
Field<Object> field = DSL.field(filterObject.optString("field"));
if(field != null) {
String fieldValue = filterObject.optString("value");
if(Comparator.EQUALS.toSQL().equals(filterCondition)) {
query.addConditions(field.eq(fieldValue));
}else if(Comparator.GREATER.toSQL().equals(filterCondition)) {
query.addConditions(field.gt(fieldValue));
}else if(Comparator.GREATER_OR_EQUAL.toSQL().equals(filterCondition)) {
query.addConditions(field.ge(fieldValue));
}else if(Comparator.IN.toSQL().equals(filterCondition)) {
List<String> listValues = new ArrayList<>();
if(!Constants.EMPTY_STRING.equals(fieldValue)) {
JSONArray valuesJson = new JSONArray(fieldValue);
for(int pos = 0; pos < valuesJson.length(); pos++){
listValues.add(valuesJson.optString(pos));
}
}
query.addConditions(field.in(listValues));
}else if(Comparator.LESS.toSQL().equals(filterCondition)) {
query.addConditions(field.lt(fieldValue));
}else if(Comparator.LESS_OR_EQUAL.toSQL().equals(filterCondition)) {
query.addConditions(field.le(fieldValue));
}else if(Comparator.LIKE.toSQL().equals(filterCondition)) {
query.addConditions(field.like(Constants.PERCENT_SYMBOL.concat(fieldValue).concat(Constants.PERCENT_SYMBOL)));
}
}
}
}
在字段中,我放置了表和字段
person.name
在谓词实现中,您的将出现另一个错误,因为您没有将JSON数组传递给谓词,而只传递序列化数组值,但这与您的问题没有严格的关系。您好@Lukas Eder,谢谢您的快速回答,在查询中dsl.select(dsl.count()).from(branch)
如何通过字段名添加条件?对不起,我不确定您在问什么。使用where子句。。。?