xml 查询一对多JsonArrayTypeHandler
JsonArrayTypeHandler
package com.zq.system.utils.Mybatis;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONException;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class JsonArrayTypeHandler extends BaseTypeHandlerJsonIntegerArrayTypeHandler
package com.zq.system.utils.Mybatis;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/*
{
private static final ObjectMapper mapper = new ObjectMapper();
@Override
public void setNonNullParameter(PreparedStatement ps, int i, Integer[] parameter, JdbcType jdbcType) throws SQLException {
ps.setString(i, toJson(parameter));
}
@Override
public Integer[] getNullableResult(ResultSet rs, String columnName) throws SQLException {
return this.toObject(rs.getString(columnName));
}
@Override
public Integer[] getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
return this.toObject(rs.getString(columnIndex));
}
@Override
public Integer[] getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
return this.toObject(cs.getString(columnIndex));
}
private String toJson(Integer[] params) {
try {
return mapper.writeValueAsString(params);
} catch (Exception e) {
e.printStackTrace();
}
return "[]";
}
private Integer[] toObject(String content) {
if (content != null && !content.isEmpty()) {
try {
return (Integer[]) mapper.readValue(content, Integer[].class);
} catch (Exception e) {
throw new RuntimeException(e);
}
} else {
return null;
}
}
}
JsonNodeTypeHandler
package com.zq.system.utils.Mybatis;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import java.io.IOException;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/*
{
private static final ObjectMapper mapper = new ObjectMapper();
@Override
public void setNonNullParameter(PreparedStatement ps, int i, JsonNode parameter, JdbcType jdbcType) throws SQLException {
String str = null;
try {
str = mapper.writeValueAsString(parameter);
} catch (JsonProcessingException e) {
e.printStackTrace();
str = "{}";
}
ps.setString(i, str);
}
@Override
public JsonNode getNullableResult(ResultSet rs, String columnName) throws SQLException {
String jsonSource = rs.getString(columnName);
if (jsonSource == null) {
return null;
}
try {
JsonNode jsonNode = mapper.readTree(jsonSource);
return jsonNode;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public JsonNode getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
String jsonSource = rs.getString(columnIndex);
if (jsonSource == null) {
return null;
}
try {
JsonNode jsonNode = mapper.readTree(jsonSource);
return jsonNode;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public JsonNode getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
String jsonSource = cs.getString(columnIndex);
if (jsonSource == null) {
return null;
}
try {
JsonNode jsonNode = mapper.readTree(jsonSource);
return jsonNode;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
JsonStringArrayTypeHandler
package com.zq.system.utils.Mybatis;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/*
{
private static final ObjectMapper mapper = new ObjectMapper();
@Override
public void setNonNullParameter(PreparedStatement ps, int i, String[] parameter, JdbcType jdbcType) throws SQLException {
ps.setString(i, toJson(parameter));
}
@Override
public String[] getNullableResult(ResultSet rs, String columnName) throws SQLException {
return this.toObject(rs.getString(columnName));
}
@Override
public String[] getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
return this.toObject(rs.getString(columnIndex));
}
@Override
public String[] getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
return this.toObject(cs.getString(columnIndex));
}
private String toJson(String[] params) {
try {
return mapper.writeValueAsString(params);
} catch (Exception e) {
e.printStackTrace();
}
return "[]";
}
private String[] toObject(String content) {
if (content != null && !content.isEmpty()) {
try {
return (String[]) mapper.readValue(content, String[].class);
} catch (Exception e) {
throw new RuntimeException(e);
}
} else {
return null;
}
}
}
select iot.id, iot.e_id, iot.iccid, iot.imei, iot.create_time,
iot.create_by, iot.net_in_time, iot.net_expire_time,
iot.set_meal_type, iot.associated_by, ees.e_name,JSON.result as JSON
from zq_site_internet_of_things
iot
left join zq_exchange_electric_station ees on iot.e_id=ees.e_id
left join (
SELECT
CONCAT(
'[',
IFNULL(
GROUP_CONCAT(
CONCAT(
'{ "noticeName":"',concat(zcp.staff_name,'(',zcp.staff_phone,')'),'"}'
) SEPARATOR
','
),
''
),
']'
) as result,ssp.things_id
FROM zq_site_thing_notice ssp
LEFT JOIN zq_oa_staff zcp ON ssp.staff_id= zcp.staff_id
LEFT JOIN zq_site_internet_of_things zs ON zs.id= ssp.things_id
group by ssp.things_id
) JSON ON JSON.things_id = iot.id