[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; QdT}wkX
} sqEI4~514
int i1=l; _4"mAPt
int i2=mid+1; [~-9i&Z
for(int cur=l;cur<=r;cur++){ bLlKe50
if(i1==mid+1) ;&<{ey
data[cur]=temp[i2++]; _"?.!
else if(i2>r) z:8eEq3w
data[cur]=temp[i1++]; FQu8vwV6>
else if(temp[i1] data[cur]=temp[i1++]; zKw`Md
else O@u?h9?cf>
data[cur]=temp[i2++]; Wvbf"hq
} t[ubn+
} K{&mI/;
'n{Nvt.c
} >.Chl$)<
![`Ay4AZ@a
改进后的归并排序: `IP/d
(!ZM{Js%
package org.rut.util.algorithm.support; ozmrw\_}[
xQ}pu2@d
import org.rut.util.algorithm.SortUtil; v25R_""~
'qZW,],5
/** "fG8?)d;
* @author treeroot C"6?bg5N
* @since 2006-2-2 'Q|M'5'
* @version 1.0 PPb7%2r
*/ _wTOmz%|R
public class ImprovedMergeSort implements SortUtil.Sort { #xho[\
oC<.=2]
private static final int THRESHOLD = 10; )Q1"\\2j0
K~c=M",mW
/* !k6K?xt
* (non-Javadoc) ?{/4b:ua
* iIMd!Q.)@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d:#yEC
*/ "Ue.@>
public void sort(int[] data) { &|Bc7+/P
int[] temp=new int[data.length]; tX5"UQA
mergeSort(data,temp,0,data.length-1); -wp|RD,}(
} Yk)."r&?
@LS@cCC,a
private void mergeSort(int[] data, int[] temp, int l, int r) { Tu$f?
int i, j, k; qs1 ?IYD
int mid = (l + r) / 2; (pY 7J
if (l == r) S0B|#O%Z
return; Ir {OheJ
if ((mid - l) >= THRESHOLD) ]^Qn
mergeSort(data, temp, l, mid); ey2S#%DF]
else q@Zn|NR
insertSort(data, l, mid - l + 1); =8t]\Y?
if ((r - mid) > THRESHOLD) !B\R''J5
mergeSort(data, temp, mid + 1, r); |bq$xp
else _kj wFq
insertSort(data, mid + 1, r - mid); IAw{P08+
ix([mQg
for (i = l; i <= mid; i++) { Ka[t75~;
temp = data; uEktQ_u[
} @CTgT-0!
for (j = 1; j <= r - mid; j++) { Gcdd3W`O
temp[r - j + 1] = data[j + mid]; v{(^1cX
} qu-B| MuOa
int a = temp[l]; G+%zn|
int b = temp[r]; <}E!w_yi
for (i = l, j = r, k = l; k <= r; k++) { ex::m&
if (a < b) { +wEac g>>E
data[k] = temp[i++]; 8.XoVW#
a = temp; S'4(0j
} else { .$qnZWcgG
data[k] = temp[j--]; t/cY=Wp
b = temp[j]; ht2\y&si
} t; 4]cg:_
} <J`0mVOX
} *pSQU=dmS
[Jogt#Fj ]
/** qf!p 9@4F[
* @param data fGUE<l
* @param l $Tu61zq
* @param i xe{!wX
*/ ^l9N48]|?
private void insertSort(int[] data, int start, int len) { sz:g,}~h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +jS|2d
} L ^q""[
} q"\Z-D0B4
} =Xi07_8Ic<
} [x+FcXb
QEz?w}b*
堆排序： _FpTFfB
)wC?T
package org.rut.util.algorithm.support; Fv~20G(O
,K)_OVB
import org.rut.util.algorithm.SortUtil; s/$?^qtyC
X:HacYqtC
/** ,}3 'I [
* @author treeroot j[`j9mM8
* @since 2006-2-2 "iy
* @version 1.0 `uOT+B%R
*/ K^1oDP
public class HeapSort implements SortUtil.Sort{ t;W0"ci9
#M9~L[nFS
/* (non-Javadoc) "W6uV!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ULs\+U
*/ OI|[roMK
public void sort(int[] data) { pMw*9sX
MaxHeap h=new MaxHeap(); ^q{9
h.init(data); >0/i[k-dk
for(int i=0;i h.remove(); uatm/o^~,
System.arraycopy(h.queue,1,data,0,data.length); &S~zNl^m
} !%CWZZ 6u
v- 2:(IV
private static class MaxHeap{ J\+0[~~
ns9U/:L
void init(int[] data){ J"!vu.[
this.queue=new int[data.length+1]; NCiW^#b
for(int i=0;i queue[++size]=data; dG@%jD)
fixUp(size); 7?#J~.d5
} >"^ O"E
} ]O]4z,n
^yWL,$
private int size=0; v\c>b:AofD
CSJdvxb
private int[] queue; ?4+9fE<Q
IdzxS
public int get() { "Lzi+1
return queue[1]; <fZyAa3}
} yMG1XEhuG
$Ipg&`S"
public void remove() { PY{ G [
SortUtil.swap(queue,1,size--); C^O VB-
fixDown(1); h{CL{>d
} HHA<IZ#;,
file://fixdown 8L,5Q9 $
private void fixDown(int k) { Z?6%;n^ 54
int j; Lb!Fcf|h
while ((j = k << 1) <= size) { J1,9kCO
if (j < size %26amp;%26amp; queue[j] j++; !=pn77`g>
if (queue[k]>queue[j]) file://不用交换 o*b] p-
break; m}C>ti`VD
SortUtil.swap(queue,j,k); y`VyQWW
k = j; <NR#Y%}-V
} L5Ebc#
} aT{_0m$G10
private void fixUp(int k) { y=fx%~<> 8
while (k > 1) { CnU*Jb
int j = k >> 1; pM+ AjPr
if (queue[j]>queue[k]) A#K14Ayr
break; %>yG+Od5Z
SortUtil.swap(queue,j,k); _>5(iDW0
k = j; n&L+wqJ
} (]Z_UTT
} dz:E?
h`]Iy
} 2V"B:X\
]GMe\n
} 4-?C>
wVX[)E\J
SortUtil： <->{
a+[RS]le
package org.rut.util.algorithm; ; ^*}#Xd
SbND Y{5RO
import org.rut.util.algorithm.support.BubbleSort; %D UH@j
import org.rut.util.algorithm.support.HeapSort; "fQ~uzg="
import org.rut.util.algorithm.support.ImprovedMergeSort; VEH&&@d
import org.rut.util.algorithm.support.ImprovedQuickSort; {}>0e:51
import org.rut.util.algorithm.support.InsertSort; w;;BSJ]+[
import org.rut.util.algorithm.support.MergeSort; Ye\rB\-
import org.rut.util.algorithm.support.QuickSort; o@r7 n>G
import org.rut.util.algorithm.support.SelectionSort; &c`nR<
import org.rut.util.algorithm.support.ShellSort; XR8,Vt)=
Gk. ruQW"
/** J; 3{3
* @author treeroot &x=.$76
* @since 2006-2-2 j?A/#
* @version 1.0 4{}FL
*/ x5|I
public class SortUtil { 5<iV2Hx
public final static int INSERT = 1; w~.f
public final static int BUBBLE = 2; fsmN)_T
public final static int SELECTION = 3; !xzeMVI
public final static int SHELL = 4; rR$h*
public final static int QUICK = 5; \(J8#V
public final static int IMPROVED_QUICK = 6; }wWKFX
public final static int MERGE = 7; A;G;^s
public final static int IMPROVED_MERGE = 8; @D)al^]x6
public final static int HEAP = 9; u~r=)His
00<cYy
public static void sort(int[] data) { f& 0M*o,)
sort(data, IMPROVED_QUICK); v:EB*3n5
} w4_ U0 n3
private static String[] name={ ^aIPN5CK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -B>++r2A^
}; yID164&r
jLy
private static Sort[] impl=new Sort[]{ 2{M^,=^>
new InsertSort(), &d9{k5/+\
new BubbleSort(), lackB2J9 A
new SelectionSort(), 9Q -HeXvR
new ShellSort(), LU+3{O5y
new QuickSort(), V @rI`~$
new ImprovedQuickSort(), *EI6dD"
new MergeSort(), a! (4Ch
new ImprovedMergeSort(), !y#"l$"xK
new HeapSort() 7;u e
}; iz5CAxm
?M$.+V{a
public static String toString(int algorithm){ TH)"wNa
return name[algorithm-1]; 6lkl7zm
} <EPj$::
NB\{'
public static void sort(int[] data, int algorithm) { '\Jj8oJQj
impl[algorithm-1].sort(data); *.~6S3}
} #O$
$={:r/R`i
public static interface Sort { P~s$EJL*
public void sort(int[] data); &FH2fMLQ
} nl(WJKq'
hX`hs-*qM
public static void swap(int[] data, int i, int j) { Dfps gY)/?
int temp = data; gzjR6uz
data = data[j]; `W dD8E
data[j] = temp; aO@7O*
} GwG4LIp
} @g2cC