[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; LABNj{=D!
} Z/7dg-$?'0
int i1=l; I="oxf#q
int i2=mid+1; PQ3h\CL1n
for(int cur=l;cur<=r;cur++){ dyO E6Ex
if(i1==mid+1) s:b"\7
data[cur]=temp[i2++]; c3#q0Ma
else if(i2>r) Vo >Xp
data[cur]=temp[i1++]; 6c&Y
else if(temp[i1] data[cur]=temp[i1++]; Yf=FeH7"
else h)@InYwu7
data[cur]=temp[i2++]; J=9#mOcg"
} n`.#59-Hx
} si?HkJv5
SX_4=^
} H(&Z:{L
t!t=|JNf{
改进后的归并排序: 6v>z h
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package org.rut.util.algorithm.support; oCuV9dA.
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import org.rut.util.algorithm.SortUtil; VDpxk$a
v ):V
/** "lrA%~3%[P
* @author treeroot N,|r1u9X#
* @since 2006-2-2 }dKLMNqPA
* @version 1.0 xqv[? ?
*/ .Q[yD<)Ubs
public class ImprovedMergeSort implements SortUtil.Sort { qd8pF!u|#
)5GQJiY
private static final int THRESHOLD = 10; 1.0J2nZpt
x5F@ad9
/* Vhph`[dC{
* (non-Javadoc) =<.F3lo\s
* D:m#d.m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'HB~Dbq`V
*/ +*.1}r&
public void sort(int[] data) { 0Cq!\nzz
int[] temp=new int[data.length]; 75AslL?t
mergeSort(data,temp,0,data.length-1); 61|B]ei/
} FWY[=S
ET+'Pj3
private void mergeSort(int[] data, int[] temp, int l, int r) { iaRR5D-
int i, j, k; %w:'!X><
int mid = (l + r) / 2; @n@g)`
if (l == r) *~;8N|4<
return; :\bfGSD/gd
if ((mid - l) >= THRESHOLD) {:)vwUe{
mergeSort(data, temp, l, mid); 3]`mQm E
else /buWAX1
insertSort(data, l, mid - l + 1); 7Ud'd<
if ((r - mid) > THRESHOLD) fnOIv#
mergeSort(data, temp, mid + 1, r); j)";:v
else @|=UrKAN
insertSort(data, mid + 1, r - mid); QptOQ3!
W>$BF[x!{
for (i = l; i <= mid; i++) { Rcf=J){D6
temp = data; G#lg|# -#
} [+Un ^gD
for (j = 1; j <= r - mid; j++) { o(Kcs-W2
temp[r - j + 1] = data[j + mid]; 9-93aC.|}
} Ux_<d?p
int a = temp[l]; GX5W^//}
int b = temp[r]; xYwkFB$$*
for (i = l, j = r, k = l; k <= r; k++) { `xIh\q
if (a < b) { tW(+xu36
data[k] = temp[i++]; )eq}MaW+j
a = temp; `Cg^in\
} else { !tBeuemN%
data[k] = temp[j--]; r<|nwFJ
b = temp[j]; NjP ]My
} :o$@F-$k
} t'aSF{%
} J7n5Ps\M
w_3xKnMT\
/** g ;LVECk
* @param data )!a$#"'
* @param l ETm]o
* @param i D$hQyhz'
*/ bpp*
private void insertSort(int[] data, int start, int len) { u~}%1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (#z;(EN0t
} ^#w{/C/n
} }4vjKSV
} =GTD"*vwr
} _[JkJwPTx
4=s9A
堆排序： {MxnIg7'
:'Xr/| s
package org.rut.util.algorithm.support; S.hC$0vrj
<I1y
import org.rut.util.algorithm.SortUtil; e?=elN
n;qz^HXEJ
/** !-RwB@\
* @author treeroot !7c'<[+Hm
* @since 2006-2-2 |[ocyUsxX
* @version 1.0 `j:M)2:*y
*/ u G[!w!e
public class HeapSort implements SortUtil.Sort{ P&\X`ZUA
tN}c0'H
/* (non-Javadoc) lM+ xU;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {_7Hz,2U
*/ HEpM4xe$
public void sort(int[] data) { 8Z!*[c>K-?
MaxHeap h=new MaxHeap(); +f|6AeE
h.init(data); IfB/O.;Kz
for(int i=0;i h.remove(); *]2R.u
System.arraycopy(h.queue,1,data,0,data.length); %A2`&:ip
} 9gR.RwR X
n.Vtc-yZU
private static class MaxHeap{ B@-"1m~la?
Y-]YDXrPQ
void init(int[] data){ ?[|hGR2L
this.queue=new int[data.length+1]; fkG##!
for(int i=0;i queue[++size]=data; 4,zvFH*AH
fixUp(size); }!=U^A)
} 97S? ;T
} '=@r7g.2
P\T|[%E'
private int size=0; 5&*zY)UL
;Z4o{(/zU
private int[] queue; AWL[zixR
~v\hIm3=m
public int get() { YLmjEs%
return queue[1]; #s{aulx
} (Com,
EZ{/]gCK
public void remove() { Z8fJ{uOIL
SortUtil.swap(queue,1,size--); OM{Dq|
fixDown(1); 0T0/fg(o
} CpSK(2j
file://fixdown )7w@E$l"
private void fixDown(int k) { FT4l$g7"
int j; ctK65h{Eo
while ((j = k << 1) <= size) { )2]a8JVf
if (j < size %26amp;%26amp; queue[j] j++; RF!'K ko
if (queue[k]>queue[j]) file://不用交换 ZYDWv/u
break; [ t$AavU.
SortUtil.swap(queue,j,k); 4(8<w cL
k = j; FW5}oD(H
} yp?w3|`4;
} hv{87`L'K(
private void fixUp(int k) { 9#fp_G;=
while (k > 1) { [,GU5,o
int j = k >> 1; b"&E,=L
if (queue[j]>queue[k]) y<v|X2
break; T g{UK
SortUtil.swap(queue,j,k); cyHU\!Z*Zq
k = j; c>rKgx
} {=6)SBjf
} x,f>X;04
5Edo%Hd6
} -)6;0
"8?TSm8
} hMWo\qM
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SortUtil： 7dHIW!OA
,m:6qdN
package org.rut.util.algorithm; .v\PilF
jOv~!7T
import org.rut.util.algorithm.support.BubbleSort; H@4/#V|Uy
import org.rut.util.algorithm.support.HeapSort; [n!x&f8Xh
import org.rut.util.algorithm.support.ImprovedMergeSort; m\?\6Wk
import org.rut.util.algorithm.support.ImprovedQuickSort; E9L!)D]Y
import org.rut.util.algorithm.support.InsertSort; 4]IKh,jT
import org.rut.util.algorithm.support.MergeSort; 'QnW9EHLF
import org.rut.util.algorithm.support.QuickSort; |e+aZ%g
import org.rut.util.algorithm.support.SelectionSort; Y!it!9
import org.rut.util.algorithm.support.ShellSort; Pr2;Kp
+nzTxpcP@K
/** !%V*UR9
* @author treeroot DiR'p`b~
* @since 2006-2-2 <uC<GDO
* @version 1.0 E$R_rX4x
*/ wcl!S{
public class SortUtil { 8UYJye8
public final static int INSERT = 1; j)BQMtt&U
public final static int BUBBLE = 2; xRB7lV*
public final static int SELECTION = 3; ivD^HhG
public final static int SHELL = 4; $Ba`VGP>)3
public final static int QUICK = 5; Qi"'bWX@
public final static int IMPROVED_QUICK = 6; j=\Mx6os
public final static int MERGE = 7; ,$ mLL
public final static int IMPROVED_MERGE = 8; _)q4I(s*
public final static int HEAP = 9; HGb.656r
V>r j$Nc]
public static void sort(int[] data) { 5)8.
sort(data, IMPROVED_QUICK); 0NrTJ R`
} ho_4fDv
private static String[] name={ smbUu/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k0knPDbHv
}; (qbc;gBy
UC(9Dz
private static Sort[] impl=new Sort[]{ *.xZfi_|
new InsertSort(), ij!*CTG
new BubbleSort(), 7G2vYKC'
new SelectionSort(), 38"cbHE3
new ShellSort(), egbb1+tY
new QuickSort(), OFQ{9
new ImprovedQuickSort(), 'cYQ?;
new MergeSort(), @| P3
new ImprovedMergeSort(), n-W?Z'H{r
new HeapSort() @T_O6TcY
}; J(^ >?d'
69rwX"^
public static String toString(int algorithm){ F46O!xb%
return name[algorithm-1]; l=,.iv=W
} 7pd$?=__I
sb 8dc
public static void sort(int[] data, int algorithm) { .1Vu-@
impl[algorithm-1].sort(data); OkkhP
} 6Z$b?A3zM
V.U|OQouT
public static interface Sort { rrYp'L
public void sort(int[] data); Iht@mE
} FGDw;lEa9[
5qeT4| Ol
public static void swap(int[] data, int i, int j) { ;*_I,|A:Xr
int temp = data; 9wzg{4/-$
data = data[j]; V54q"kP,@.
data[j] = temp; SK}HXG{?
} WVinP(#nfM
} B JU*`Tx