动态SQL脚本生成(完全兼容mybatis)
@Test
public void t1() {
String sql = "select * from sql_script where id=#{id} and name like '${name}'";
XMLLanguageDriver xmlLanguageDriver = new XMLLanguageDriver();
SqlSource sqlSource = xmlLanguageDriver.createSqlSource(sql);
Map<String, Object> params = new HashMap<>();
params.put("id", 2);
params.put("name", "%queryAll%");
BoundSql boundSql = sqlSource.getBoundSql(params);
boundSql.getParameterValueList();
log.info("--> {}", boundSql.getSql());
// BoundSql 支持命名参数
log.info("--> {}", boundSql.getNamedParameterSql());
}输出:
--> select * from sql_script where id=? and name like '%queryAll%'
--> select * from sql_script where id=:id and name like '%queryAll%'
@Test
public void t2() {
String sql =
"<script>" +
" select * from sql_script where id=#{id} and name=#{name} and id in ( " +
" <foreach collection='list' item='item' separator=','>#{item}</foreach> " +
" ) " +
" and name in (" +
" <foreach collection='names' item='item' separator=','>#{item}</foreach>" +
" )" +
" order by ${orderBy}" +
"</script>";
XMLLanguageDriver xmlLanguageDriver = new XMLLanguageDriver();
SqlSource sqlSource = xmlLanguageDriver.createSqlSource(sql);
Map<String, Object> params = new HashMap<>();
params.put("id", "value111111111111111111");
params.put("name", "lzw");
List<Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
list.add(4);
list.add(5);
list.add(6);
params.put("list", list);
List<String> names = new ArrayList<>();
names.add("name1");
names.add("name2");
names.add("name3");
names.add("name4");
names.add("name5");
names.add("name6");
params.put("names", names);
params.put("orderBy", "a.aaa DESC, a.bbb ASC");
BoundSql boundSql = sqlSource.getBoundSql(params);
boundSql.getParameterValueList();
log.info("--> {}", boundSql.getSql());
// BoundSql 支持命名参数
log.info("--> {}", boundSql.getNamedParameterSql());
}输出:
--> select * from sql_script where id=? and name=? and id in ( ? , ? , ? , ? , ? , ? ) and name in ( ? , ? , ? , ? , ? , ? ) order by a.aaa DESC, a.bbb ASC
--> select * from sql_script where id=:id and name=:name and id in ( :__frch_item_0 , :__frch_item_1 , :__frch_item_2 , :__frch_item_3 , :__frch_item_4 , :__frch_item_5 ) and name in ( :__frch_item_6 , :__frch_item_7 , :__frch_item_8 , :__frch_item_9 , :__frch_item_10 , :__frch_item_11 ) order by a.aaa DESC, a.bbb ASC
@Test
public void t3() {
Author author = new Author(1, "cbegin", "******", "cbegin@apache.org", "N/A", Section.NEWS);
String sql = "<script>select * from author where username=#{username}</script>";
XMLLanguageDriver xmlLanguageDriver = new XMLLanguageDriver();
SqlSource sqlSource = xmlLanguageDriver.createSqlSource(sql);
BoundSql boundSql = sqlSource.getBoundSql(author);
boundSql.getParameterValueList();
log.info("--> {}", boundSql.getSql());
// BoundSql 支持命名参数
log.info("--> {}", boundSql.getNamedParameterSql());
}输出:
--> select * from author where username=?
--> select * from author where username=:username
@Test
public void t5() {
Author author = new Author(1, "cbegin", "******", "cbegin@apache.org", "N/A", Section.NEWS);
String sql = "<script>select * from author where username=#{author.username}</script>";
XMLLanguageDriver xmlLanguageDriver = new XMLLanguageDriver();
SqlSource sqlSource = xmlLanguageDriver.createSqlSource(sql);
Map<String, Object> params = new HashMap<>();
params.put("author", author);
BoundSql boundSql = sqlSource.getBoundSql(params);
boundSql.getParameterValueList();
log.info("--> {}", boundSql.getSql());
// BoundSql 支持命名参数
log.info("--> {}", boundSql.getNamedParameterSql());
}输出:
--> select * from author where username=?
--> select * from author where username=:author.username
@Test
public void t6() {
String sql = "<script>" +
" select * from sql_script where id=#{id} and name=#{name} and id in ( " +
" <foreach collection='list' item='item' separator=','>#{item}</foreach> " +
" ) " +
" and name in (" +
" <foreach collection='names' item='item' separator=','>#{item}</foreach>" +
" )" +
" order by ${orderBy}" +
"</script>";
Map<String, Object> params = new HashMap<>();
params.put("id", "value111111111111111111");
params.put("name", "lzw");
List<Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
list.add(4);
list.add(5);
list.add(6);
params.put("list", list);
List<String> names = new ArrayList<>();
names.add("name1");
names.add("name2");
names.add("name3");
names.add("name4");
names.add("name5");
names.add("name6");
params.put("names", names);
params.put("orderBy", "a.aaa DESC, a.bbb ASC");
final int count = 100000;
final long start = System.currentTimeMillis();
XMLLanguageDriver xmlLanguageDriver = new XMLLanguageDriver();
SqlSource sqlSource = xmlLanguageDriver.createSqlSource(sql);
for (int i = 0; i < count; i++) {
BoundSql boundSql = sqlSource.getBoundSql(params);
boundSql.getParameterValueList();
}
final long end = System.currentTimeMillis();
log.info("--> 耗时 {}s, 速度： {}次/ms", (end - start) / 1000.0, count / (end - start));
}输出:
--> 耗时 2.9s, 速度： 34.48275862068966次/ms
public class BoundSql {
/**
* 生成的SQL语句
*/
private final String sql;
/**
* 参数名称形式的sql
*/
private final String namedParameterSql;
/**
* Sql参数名称列表(有顺序)
*/
private final List<String> parameterList;
/**
* Sql参数值列表(有顺序)
*/
private List<Object> parameterValueList;
/**
* Sql参数Map集合
*/
private Map<String, Object> parameterMap;
}
#obj.notEmpty(param)判断对象不为null，字符串不为空字符串，数组集合不为空。最常用，符合所有的空判断#obj.hasValue(param)同#obj.notEmpty(...)，只是一个notEmpty别名#obj.exists(param)同#obj.notEmpty(...)，只是一个notEmpty别名#obj.isIn(param, val_1, val_2', ...)判断param参数值在给定的范围(val_1, val_2', ...)内#obj.isInIgnoreCase(param, val_1, val_2', val_3, ...)与#obj.isIn(...)类似，仅仅只是针对字符串值，并且忽略字符串大小写#str.isNotBlank(param)字符串不为空字符串#str.isBlank(param)字符串是空字符串#str.hasText(param)字符串不为空字符串，#str.isNotBlank(...)别名#str.hasLength(param)字符串长度大于0#str.contains(param, searchStr)字符串是否包含一个子字符串#str.containsIgnoreCase(param, searchStr)字符串是否包含一个子字符串，不区分大小写#str.trim(param)删除字符串头尾空格
<select>
select * from sql_script
<where>
<if test="#str.isNotBlank(f1)">
and f1=#{f1}
</if>
<if test="#str.isNotBlank(f2)">
and f2=#{f2}
</if>
<if test="#obj.isIn(f3, 'aaa', 'bbb', 'ccc', 1, false)">
and f3=#{f3}
</if>
<if test="#obj.notEmpty(f1)">
and f1=#{f1}
</if>
<if test="#obj.notEmpty(f4)">
and f4=#{f4}
</if>
<if test="#obj.notEmpty(f5)">
and f5=#{f5}
</if>
<if test="#obj.notEmpty(f6)">
and f6=#{f6}
</if>
</where>
</select>