谁能跟我解释一下Mybatis配置文件中这些语句的含义?最好帮我把里面标签含义说出来就行了 100
<sqlid="Example_Where_Clause"><where><foreachcollection="oredCriteria"item="criteria"...
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql> 展开
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql> 展开
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2个回答
2015-07-18
展开全部
include<iostream>
using namespace std;
char *deletechar(char *a)
{
int len=strlen(a);
char *b=new char();
int k=0;
for(int i=0;i<len;i++)
{
if(a[i]>='0' && a[i]<='9')
{
b[k]=a[i];
k++;
}
}
using namespace std;
char *deletechar(char *a)
{
int len=strlen(a);
char *b=new char();
int k=0;
for(int i=0;i<len;i++)
{
if(a[i]>='0' && a[i]<='9')
{
b[k]=a[i];
k++;
}
}
追问
你煞笔吗?不会别乱发ok?
ps:草泥马 非要让你家人被骂干嘛
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展开全部
<sql>标签是用来被其他标签引用的。<where>标签就是一个条件标签。<<foreach>就是迭代了。
最终得到的结果: where (conditonA=xxx and conditonA=xxx) or (conditonA=xxx and conditonA=xxx) or (.....)
最终得到的结果: where (conditonA=xxx and conditonA=xxx) or (conditonA=xxx and conditonA=xxx) or (.....)
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