[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; %moJF1
} Iph3%RaE
int i1=l; \;-qdV_JB
int i2=mid+1; ;SfNKu
for(int cur=l;cur<=r;cur++){ U);OR
if(i1==mid+1) 6^Ph '
data[cur]=temp[i2++]; {]=v]O|,
else if(i2>r) IQT cYl
data[cur]=temp[i1++]; 3=Z<wD s
else if(temp[i1] data[cur]=temp[i1++]; {] O`gG
else 2-~a P
data[cur]=temp[i2++]; wDDxj
} gF3TwAr
} lY.B
B]1HS`*7
} QjLji+L
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改进后的归并排序: kGm:VYf%
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package org.rut.util.algorithm.support; iSlFRv?a
o w2$o\hC
import org.rut.util.algorithm.SortUtil; =HMmrmz:
Raefj(^V
/** 1 o|T
* @author treeroot <{giHT
* @since 2006-2-2 BBvZeG $Y
* @version 1.0 L!gDFZr
*/ jPnO@H1
public class ImprovedMergeSort implements SortUtil.Sort { z!:'V]
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private static final int THRESHOLD = 10; sMH#BCC
va5FxF*%
/* _Fizgs
* (non-Javadoc) \83sSw
* "IG+V:{ou
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k^^:;OR
*/ uArR\k(
public void sort(int[] data) { 2/@D7>F&g
int[] temp=new int[data.length]; >\ZR*CS
mergeSort(data,temp,0,data.length-1); k5@d! }#c
} E:FO_R(Xq
%w7m\nw@
private void mergeSort(int[] data, int[] temp, int l, int r) { S8%n.<OB
int i, j, k; JvkL37^n:
int mid = (l + r) / 2; ^n9a" qz
if (l == r) ,-@5NY1q
return; |z~LzSJv
if ((mid - l) >= THRESHOLD) &3Tx@XhO
mergeSort(data, temp, l, mid); x5OC;OQc
else 1kmQX+f
insertSort(data, l, mid - l + 1); O%-h&C3
if ((r - mid) > THRESHOLD) 7 jjU
mergeSort(data, temp, mid + 1, r); VFO\4:.
else [?KJ9~+0
insertSort(data, mid + 1, r - mid); t+Z`n(>
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for (i = l; i <= mid; i++) { 1TjZ#yP%1
temp = data; <*u C
} bD<qNqX$
for (j = 1; j <= r - mid; j++) { }E;F)=E
temp[r - j + 1] = data[j + mid]; S5_t1wqBJ
} wVqd$nsY"
int a = temp[l]; [9V]On
int b = temp[r]; F}U5d^!2
for (i = l, j = r, k = l; k <= r; k++) { #dc1pfL!y{
if (a < b) { )p8I@E
data[k] = temp[i++]; B,_`btJh
a = temp; ''S&e
} else { \&a.}t
data[k] = temp[j--]; . uR M{Bs
b = temp[j]; m=TJDr-
} g_w&"=.jBq
} 9cd8=][
} K)S;:MLG=
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/** >|3a 9S
* @param data rGlRAn#?,
* @param l 5j{Np,K
* @param i r7 VXeoX
*/ NP/>H9Q2%
private void insertSort(int[] data, int start, int len) { s /%:dnij
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K=6UK%y A
} \DA$6w\\
} \Hwg) Uc{
} +y&d;0!
} ?t rV72D
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堆排序： Z0ReWrl;`
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package org.rut.util.algorithm.support; jxw_*^w"
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import org.rut.util.algorithm.SortUtil; <y)E>Fl
nrpI5t.b
/** M3pjXc<O
* @author treeroot f vLC_'M
* @since 2006-2-2 +a|/l
* @version 1.0 }Qrab#v
*/ '#Dg8/r!
public class HeapSort implements SortUtil.Sort{ {J]-<:XD
YQgNv`l}
/* (non-Javadoc) :Q@)*kQH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /smiopFcq
*/ dqe7sZl!
public void sort(int[] data) { [vTMS2
MaxHeap h=new MaxHeap(); ZA\/{Fw
h.init(data); @Bs0Avj.
for(int i=0;i h.remove(); mm[SBiFO\
System.arraycopy(h.queue,1,data,0,data.length); otr>3a*'
} B@t'U=@7
"tu*YNP\Q
private static class MaxHeap{ 5Qa zHlJ
]Kdet"+
void init(int[] data){ Q$ZHv_VLx
this.queue=new int[data.length+1]; V 0{tap}
for(int i=0;i queue[++size]=data; w([$@1]
fixUp(size); sR=/%pVN
} k0H#:c}
} z.)p P'CJo
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private int size=0; ?KWj}|%
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private int[] queue; mlu 3K
~ 3T,&?r
public int get() { &L4 q10-N
return queue[1]; J]pa4C`
} eThy+
ULBg{e?l8
public void remove() { UQT'6* !
SortUtil.swap(queue,1,size--); .q;ED`G
fixDown(1); Hl7:*]l7b
} ijUzC>O+q
file://fixdown :&VcB$
private void fixDown(int k) { z4M1D9iPY
int j; ftZj}|R!
while ((j = k << 1) <= size) { @Doyt{|T
if (j < size %26amp;%26amp; queue[j] j++; .T.5TMiOSq
if (queue[k]>queue[j]) file://不用交换 NZXjE$<Vr
break; q'S =Eav8
SortUtil.swap(queue,j,k); Bw<rp-
k = j; Z1,gtl ?
} Hs0pW5oZ
} >q7 %UK]&
private void fixUp(int k) { &ak6zM
while (k > 1) { gPEqjj
int j = k >> 1; y,m2(V
if (queue[j]>queue[k]) H{fM%*w
break; 6C-YyI#s#
SortUtil.swap(queue,j,k); 8_we: 9A
k = j; (P@Y36j>N
} IcF@F>>
} 85]SC$
:tGYs8UK
} 61K"(r~
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} d"THt}
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SortUtil： (f1M'w/OD
[}o~PN:sT(
package org.rut.util.algorithm; k%Vv?{g
H\G{3.T.9
import org.rut.util.algorithm.support.BubbleSort; jqcz\n d
import org.rut.util.algorithm.support.HeapSort; GJQc!cqk
import org.rut.util.algorithm.support.ImprovedMergeSort; Yx)o:#2
import org.rut.util.algorithm.support.ImprovedQuickSort; I6w~H?ul@*
import org.rut.util.algorithm.support.InsertSort; B)=~8wsI:Z
import org.rut.util.algorithm.support.MergeSort; ($!KzxF3
import org.rut.util.algorithm.support.QuickSort; rVryt<2:@r
import org.rut.util.algorithm.support.SelectionSort; ZX.TqvK/r
import org.rut.util.algorithm.support.ShellSort; {aj/HFLNY
%c/^_.
/** %:u[MBe,
* @author treeroot $Ua56Y
* @since 2006-2-2 i|$z'HK;+
* @version 1.0 Ax<\jW<
*/ Z<z;L<tJ 9
public class SortUtil { VOgi7\
public final static int INSERT = 1; Rp.W,)i
public final static int BUBBLE = 2; eaZQ2
public final static int SELECTION = 3; 7'w0
public final static int SHELL = 4; Q/^A #l[
public final static int QUICK = 5; sic$uT
public final static int IMPROVED_QUICK = 6; N:BL=}V
public final static int MERGE = 7; Dpqt;8"2L
public final static int IMPROVED_MERGE = 8; 2(#Ks's?
public final static int HEAP = 9; F=wRkU
:Jxh2
public static void sort(int[] data) { :nGMtF
sort(data, IMPROVED_QUICK); \e:d)^cbh
} ;j}yB
private static String[] name={ x8N|($1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WS0JS'
}; Ex(3D[WmMW
;Ss$2V'a
private static Sort[] impl=new Sort[]{ TMj4w,g4
new InsertSort(), fEnQE EU~P
new BubbleSort(), nkY@_N
new SelectionSort(), !,&yyx.
new ShellSort(), EESN\_{~.
new QuickSort(), dbF M,"^
new ImprovedQuickSort(), j$@tK0P
new MergeSort(), `rFAZcEj%
new ImprovedMergeSort(), mP}#Ccji?
new HeapSort() Np,2j KF(
}; =,/D/v$m'2
xAdq+$><
public static String toString(int algorithm){ d>i13dAI
return name[algorithm-1]; _a -]?R
} {BV4h%P]:
XB\zkf_}Xc
public static void sort(int[] data, int algorithm) { 6Z! y
impl[algorithm-1].sort(data); 'ZHdV,dd
} p+w8$8)
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public static interface Sort { O.+9,4A(
public void sort(int[] data); $RO$}!
} wyY*:{lZ
o'=VZT9
public static void swap(int[] data, int i, int j) { _6LoVS
int temp = data; -T_\f?V88
data = data[j]; _j ;3-m
data[j] = temp; t&RruwN_;
} O!F]^'!
} B;t=B_oK