DB2中locate用法
package com.unisure.hrss.ldjc.test;public class Main {
/**
* 检查字符串是否包含某个字符串
*/
public void checkStringContains() {
String needle1 = "6;,9;,10;;";
String needle2 = "7";
String haystack = ";";
int index1 = needle1.indexOf(haystack);
int index2 = needle2.indexOf(haystack);
//getSql(needle1, haystack, index1);
System.out.println(getSql(needle1, haystack, "ldsq"));
System.out.println(getSql(needle2, haystack, "ygsq"));
}
/**
* @param needle 待输入的字符串
* @param mode 待分隔的字符串
* @param index1 待验证的index
* @param colName 待比较的字段名称
* @return
*/
private String getSql(String needle, String mode, String colName) {
StringBuffer sql = new StringBuffer();
int index = needle.indexOf(mode);
if (index != -1){
String[] arry = needle.split(",");
for (int i=0;i<arry.length;i++) {
if(i==0){
sql.append(" and (locate('").append(arry);
}else if(i!=0){
sql.append(" or locate('").append(arry);
}
sql.append("',").append(colName).append(")>0");
}
if(arry.length>0) sql.append(") ");
return sql.toString();
} else{
sql.append(" and ").append(colName).append(" like '%").append(needle).append(";%'");
}
return sql.toString();
}
/**
* Starts the program
*
* @param args the command line arguments
*/
public static void main(String[] args) {
new Main().checkStringContains();
}
}
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