[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; ^pIT,|myY7
} 1r'skmxq
int i1=l; 6]1cy&SG
int i2=mid+1; ;(5b5PA
for(int cur=l;cur<=r;cur++){ XhhV7J_F
if(i1==mid+1) wgp{P>oBX
data[cur]=temp[i2++]; IXc"gO
else if(i2>r) #Fm,mO$v
data[cur]=temp[i1++]; V]&0"HX2r!
else if(temp[i1] data[cur]=temp[i1++]; \ ?sM
else /p}^Tpu
data[cur]=temp[i2++]; Z]jm.'@z@
} Db3#;
} Xz4T_-X8d
$t}t'uJ
} !#xk?LyB
OXAr..
改进后的归并排序: ER-X1fD
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package org.rut.util.algorithm.support; xy;u"JY*
}V:ZGP#!'
import org.rut.util.algorithm.SortUtil; js^+{~
MROe"Xj
/** .ww~'5b0
* @author treeroot ]jQj/`v1
* @since 2006-2-2 @A?Ss8p'
* @version 1.0 !g=4\C`mY
*/ aGSix}b1P
public class ImprovedMergeSort implements SortUtil.Sort { 0&wbGbg(W
a/p} ?!\
private static final int THRESHOLD = 10; +J[<zxh\
=cz^g^7
/* Ww\M3Q`h
* (non-Javadoc) g4z*6L,u
* 5\S s`#g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !79eF)
*/ KUD&vqx3
public void sort(int[] data) { 9eR4?^(3!
int[] temp=new int[data.length]; Pnl+.?
mergeSort(data,temp,0,data.length-1); ,y5,+:Y ~
} ,r_%p<lOFu
ykMdH:
private void mergeSort(int[] data, int[] temp, int l, int r) { 1/\JJ\
int i, j, k; \%BII>VS
int mid = (l + r) / 2; [a201I0 -
if (l == r) dBRK6hFC
return; j{&*]QTN
if ((mid - l) >= THRESHOLD) W!jg
mergeSort(data, temp, l, mid); "WF@T
else H;w8[ImK
insertSort(data, l, mid - l + 1); @y1:=["b
if ((r - mid) > THRESHOLD) "Sb<"$:
mergeSort(data, temp, mid + 1, r); *TyLB&<t
else z*,J0)<Q
insertSort(data, mid + 1, r - mid); O n/q&h5
+Z7:(o<
for (i = l; i <= mid; i++) { (baBi9<P=
temp = data; [%LIW%t|
} 4"^v]&I
for (j = 1; j <= r - mid; j++) { [Fk|%;B/~
temp[r - j + 1] = data[j + mid]; X+7@8)1(
} hEhvA6f,
int a = temp[l]; i K,^|Q8
int b = temp[r]; j"5 $m@lgn
for (i = l, j = r, k = l; k <= r; k++) { JavSR1_
if (a < b) { nq%GLUH
data[k] = temp[i++]; iy-~CPNB_
a = temp; ,z5B"o{Et
} else { X+KQ%Efo
data[k] = temp[j--]; b=PB"-
b = temp[j]; It#T\fU
} p>h&SD?b
} hMnJH_siY
} tRYi q
]@A31P4t|
/** )(V!& w6
* @param data }.t8Cy9G
* @param l 9s2N!bx
* @param i y^}00Z+l
*/ .azA1@V|
private void insertSort(int[] data, int start, int len) { j|owU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FA$1&Fu3Y
} gJYX
} P$i d?
} zlhI\jRdc
} "JpnmE[`
oi\e[qE
堆排序： L(`Rf0smt
94'0X
package org.rut.util.algorithm.support; $.KDnl^
aX}:O
import org.rut.util.algorithm.SortUtil; GF17oMi
ZIp"X
/** d: LP8
* @author treeroot -_T@kg[0zB
* @since 2006-2-2 ?bw1zYP
* @version 1.0 Z"5ewU<?
*/ \[Q*d
public class HeapSort implements SortUtil.Sort{ hZ~\Z S7
AfXlV-v
/* (non-Javadoc) vN$j@h .
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9#)&
*/ gaVQ3NqF
public void sort(int[] data) { Ja%(kq[v
MaxHeap h=new MaxHeap(); w6G<&1iH
h.init(data); TKrh3
for(int i=0;i h.remove(); ]vUTb9>{?
System.arraycopy(h.queue,1,data,0,data.length); s\io9'Ec
} *,#T&M7D
|P`:NAf2
private static class MaxHeap{ /2fQM_ ,P
:FWo,fq?:{
void init(int[] data){ &!KW[]i%9}
this.queue=new int[data.length+1]; gQlL0jAV
for(int i=0;i queue[++size]=data; 3ox 0-+_
fixUp(size); #9u2LK
} CSNfLGA
} MClvmv^
|iGfWJ^+
private int size=0; 65AG#O5R
(@ixV$Y
private int[] queue; v|#}LQZ
^gd[UC-"w
public int get() { B<6Ye9zuG
return queue[1]; d'*:2;)g^
} x$;kA}gy
jblj]/
public void remove() { /qObXI
SortUtil.swap(queue,1,size--); s2;b-0
fixDown(1); * vW#XDx
} L>{p>
file://fixdown -Gn0TA2/C
private void fixDown(int k) { ~E*`+kD
int j; ?h7(,39^>
while ((j = k << 1) <= size) { }.74w0~0^
if (j < size %26amp;%26amp; queue[j] j++; =6^phZ(
if (queue[k]>queue[j]) file://不用交换 mQqv{1
break; #t?tt,nc}
SortUtil.swap(queue,j,k); @-G^Jm9~\m
k = j; Y=YIz>u
} cr"AK"TQ
} t182&gpd`
private void fixUp(int k) { a^QyYX}\qR
while (k > 1) { k.("<)
int j = k >> 1; fsH=2p
if (queue[j]>queue[k]) kCVA~%d7
break; h4lrt
SortUtil.swap(queue,j,k); l4smAT
k = j; A0`#n|(Ad!
} WC *e#QP
} v\3}5v%YI
^;gwD4(hs
} E[E7GsmqV
VdetY\
} Kb5 YA
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SortUtil： "JJEF2e@Z
sm>5n_Vw
package org.rut.util.algorithm; -`<KjS
;Uv/#"r
import org.rut.util.algorithm.support.BubbleSort; I|oS`iLl$
import org.rut.util.algorithm.support.HeapSort; r[Zg$CW
import org.rut.util.algorithm.support.ImprovedMergeSort; ]F81N(@:F
import org.rut.util.algorithm.support.ImprovedQuickSort; v(vJ[_&%
import org.rut.util.algorithm.support.InsertSort; mf\eg`'4?
import org.rut.util.algorithm.support.MergeSort; = gbB)u-Pc
import org.rut.util.algorithm.support.QuickSort; G.[,P~yy.
import org.rut.util.algorithm.support.SelectionSort; AQ` `Dp
import org.rut.util.algorithm.support.ShellSort; Fo@cz"%
;R x Rap
/** QFYO_$1Y)
* @author treeroot MzudCMF
* @since 2006-2-2 y_e$W3bON,
* @version 1.0 F:B8J4/
*/ -=)Al^V4T
public class SortUtil { {Z^ G]@
public final static int INSERT = 1; 4Cn% h)w
public final static int BUBBLE = 2; GZ@`}7b}
public final static int SELECTION = 3; U1!#TD)@
public final static int SHELL = 4; r3_O?b
public final static int QUICK = 5; Sl7x>=
public final static int IMPROVED_QUICK = 6; |{en){:
public final static int MERGE = 7; 2S^:fm}
public final static int IMPROVED_MERGE = 8; G&LOjd2
public final static int HEAP = 9; iE8
THl={,Rw`
public static void sort(int[] data) { CfMCc:8mL
sort(data, IMPROVED_QUICK); {Jx-Zo>'
} W3.(s~)o
private static String[] name={ *`g'*R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QO&{Jx.^[
}; yur5"$n
V@C8HTg
private static Sort[] impl=new Sort[]{ $t{;- DpNB
new InsertSort(), !`h^S)$
new BubbleSort(), g,61'5\
new SelectionSort(), =}1)/gcM
new ShellSort(), -\dcs?
new QuickSort(), KyQd6 1
new ImprovedQuickSort(), ??u*qO:p
new MergeSort(), ^_rBEyz@
new ImprovedMergeSort(), R|u2ga~
new HeapSort() K275{ydN
}; )nM<qaI{
}gR!]Cs)^
public static String toString(int algorithm){ ;.'\8!j
return name[algorithm-1]; H,q-*Kk
} ;b6h/*;'
oH]_2[ !
public static void sort(int[] data, int algorithm) { Krw'|<
impl[algorithm-1].sort(data); $3'xb/3|
} f]C`]qg
3"O&IY<
public static interface Sort { \0,8?S
public void sort(int[] data); L4t(Y7
} &ra2(S45
uy'qIq
public static void swap(int[] data, int i, int j) { pAtt=R,Ht
int temp = data; [fZhfZ)<
data = data[j]; ZTg[}+0e
data[j] = temp; 8c3/n
} {\u6Cjx
} s^R$u"pFs