mybatis的使用-Mapper文件各种语法介绍

<select id="getByQueryParam" parameterType="com.systom.base.BaseDaoQueryParam" resultMap="BaseResultMap">
 SELECT
  *
 FROM
  user
 WHERE 1 = 1
 <if test="paramString != null">
 and ${paramString}
 </if>
 <foreach collection="paramMap.keys" item="k" separator=""> 
 <if test="null != paramMap[k]"> 
  and ${k} = #{paramMap.${k}} 
 </if> 
 </foreach>
  <if test="paramInt1 != null and paramInt1 > 0 and paramInt2 != null and paramInt2 > 0">
 limit #{paramInt1,jdbcType=INTEGER}, #{paramInt2,jdbcType=INTEGER}
 </if>
 </select>

package com.systom.base; 
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
 
public class BaseDaoQueryParam implements Serializable {
 
 private static final long serialVersionUID = -8917191044499296040L;
 private String paramString;
 private Map<String, Object> paramMap = new HashMap<String, Object>();
 private int paramInt1;
 private int paramInt2;
 private String orderBy;
 private String orderType;
 
 public BaseDaoQueryParam(String paramString, Map<String, Object> paramMap, int paramInt1,
 int paramInt2) {
 super();
 this.paramString = paramString;
 if(paramMap != null) this.paramMap = paramMap;
 this.paramInt1 = paramInt1;
 this.paramInt2 = paramInt2;
 }
 
 public BaseDaoQueryParam(String paramString, Map<String, Object> paramMap, int paramInt1,
 int paramInt2, String orderBy, String orderType) {
 super();
 this.paramString = paramString;
 if(paramMap != null) this.paramMap = paramMap;
 this.paramInt1 = paramInt1;
 this.paramInt2 = paramInt2;
 this.orderBy = orderBy;
 this.orderType = orderType;
 }
 
 public String getParamString() {
 return paramString;
 }
 
 public void setParamString(String paramString) {
 this.paramString = paramString;
 }
 
 public Map<String, Object> getParamMap() {
 return paramMap;
 }
 
 public void setParamMap(Map<String, Object> paramMap) {
 this.paramMap = paramMap;
 }
 
 public int getParamInt1() {
 return paramInt1;
 }
 
 public void setParamInt1(int paramInt1) {
 this.paramInt1 = paramInt1;
 }
 
 public int getParamInt2() {
 return paramInt2;
 }
 
 public void setParamInt2(int paramInt2) {
 this.paramInt2 = paramInt2;
 }
 
 public String getOrderBy() {
 return orderBy;
 }
 
 public void setOrderBy(String orderBy) {
 this.orderBy = orderBy;
 }
 
 public String getOrderType() {
 return orderType;
 }
 
 public void setOrderType(String orderType) {
 this.orderType = orderType;
 }
}

<if test="menu.authority != null"> 
 <![CDATA[ and authority < #{menu.authority}]]> 
</if> 

<if test="menu.authority != null"> 
 and authority &lt; #{menu.authority} 
</if> 

<if test="menu.authority != null"> 
 and authority &gt;= #{menu.authority} 
</if>