[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; 7esG$sVj(
} tZU"Ud
int i1=l; 2X)E3V/*
int i2=mid+1; Z[AJat@H
for(int cur=l;cur<=r;cur++){ E] t:_v
if(i1==mid+1) J(M0t~RZ
data[cur]=temp[i2++]; ^=D77 jS
else if(i2>r) _ZD)#?
data[cur]=temp[i1++]; +B_q? 6pR
else if(temp[i1] data[cur]=temp[i1++]; [gzw<b:`
else Q_6./.GQ
data[cur]=temp[i2++]; P}&7G-
} C3bZ3vcW$
} ?GD{}f33
ozkN&0
} h:#
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改进后的归并排序: ERGDo=j
v[r:1T@
package org.rut.util.algorithm.support; `Xmf4
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import org.rut.util.algorithm.SortUtil; [CRy>hfV
~@BV
/** ,A =%!p+
* @author treeroot O`t ]#
* @since 2006-2-2 ;b cy(Fp,\
* @version 1.0 XOgX0cRC4
*/ +5?hkQCX1^
public class ImprovedMergeSort implements SortUtil.Sort { .XURI#b
<pYGcVB9V
private static final int THRESHOLD = 10; 1(hgSf1WH
qJ"dkT*
/* 9qwVBu ;
* (non-Javadoc) -1S+fUkiK/
* wXXv0OzK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xj+1]KRN
*/ |mk$W$h
public void sort(int[] data) { j=dHgnVvj
int[] temp=new int[data.length]; PM=I
mergeSort(data,temp,0,data.length-1); SP HeI@i
} ~LO MwMHl
mkj`z
private void mergeSort(int[] data, int[] temp, int l, int r) { "@GopD
int i, j, k; ^o:0 Y}v=
int mid = (l + r) / 2; *M+:GH/5
if (l == r) 8xg:ItJaA0
return; Ao`9fI#q
if ((mid - l) >= THRESHOLD) ;n7k_K#0z!
mergeSort(data, temp, l, mid); %>xW_5;Z
else .b N0!
insertSort(data, l, mid - l + 1); "Oh-`C
if ((r - mid) > THRESHOLD) $CL=M
mergeSort(data, temp, mid + 1, r); Yq`r>g
else #5G!lbH
insertSort(data, mid + 1, r - mid); [ "J
k@4]s_2
for (i = l; i <= mid; i++) { `x6 i5mp
temp = data; a2Q9tt>Q
} :7:Nx`D8
for (j = 1; j <= r - mid; j++) { b%,5B
temp[r - j + 1] = data[j + mid]; a/L?R Uu
} ?h K+h.{
int a = temp[l]; \^N9Q9{7]
int b = temp[r]; 6=A++H@
for (i = l, j = r, k = l; k <= r; k++) { rx_'(
if (a < b) { N[aK#o,
data[k] = temp[i++]; {x2N~1!E
a = temp; [_-CO}>
} else { /kx:BoV
data[k] = temp[j--]; i7e{REBXb
b = temp[j]; <T
} %tUJ >qYU
} k[Uc_=
} W.zA1S
4X#>;
/** Pm+H!x,
* @param data JsfbY^wz
* @param l ]Z<{ ~
* @param i s'~_pP
*/ 2c8,H29
private void insertSort(int[] data, int start, int len) { z%+?\.oH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lOd[8|/
} N ?V5gi
} 1v`<Vb%"}T
} _k5KJKvr
} vuDp_p*]S
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堆排序： t4h05i
M9bb,`X>Q
package org.rut.util.algorithm.support; l4R:_Z<
6],5X^*Y
import org.rut.util.algorithm.SortUtil; )_xM)mH
qZ_^#%zO
/** 0lmoI4bW}s
* @author treeroot YfxZ<
* @since 2006-2-2 eg?vYW
* @version 1.0 jn)~@~c
*/ m]7yc>uDy
public class HeapSort implements SortUtil.Sort{ CzNSJVE5
PcUi+[s;x
/* (non-Javadoc) mqq~&nI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8.Y6r
*/ ^U~YG=!ww
public void sort(int[] data) { LsV!Sd
MaxHeap h=new MaxHeap(); L8R|\Bx
h.init(data); $D9JsUij
for(int i=0;i h.remove(); F P mLost
System.arraycopy(h.queue,1,data,0,data.length); C+y:<oo)
} y3;G<9K2c]
ix7N q7!N
private static class MaxHeap{ &)xoR4!2
bmt2~!
void init(int[] data){ c?<FMb3]
this.queue=new int[data.length+1]; ##k=='dR
for(int i=0;i queue[++size]=data; dVO|q9 /
fixUp(size); >-y'N.l^
} ) I-8.
} .]v8W51Y
!8l4Hc8
private int size=0; )2bPu[U
'7xmj:.==
private int[] queue; s`H}NjWx
dxMz!
public int get() { ~73YOGiGJH
return queue[1]; Fo;xA
} j24BB}mBB
DOU\X N
public void remove() { X`J~3s
SortUtil.swap(queue,1,size--); g<UjB
fixDown(1); FE$)[w,m
} x]y~KbdeB
file://fixdown q7m-} mBN~
private void fixDown(int k) { !y4o^Su[
int j; -fG;`N5U
while ((j = k << 1) <= size) { #@y4/JS&2
if (j < size %26amp;%26amp; queue[j] j++; ^P&y9dC.
if (queue[k]>queue[j]) file://不用交换 'Ur$jW
break; )W*S6}A
SortUtil.swap(queue,j,k); 8#7z5:_
k = j; Eer rIV
} v9M;W+J
} "hs`Y4U
private void fixUp(int k) { /A<L
while (k > 1) { 2,NQ(c_c$
int j = k >> 1; 6PvV X*5T
if (queue[j]>queue[k]) c(YNv4*X
break; ,VJ0J!@
SortUtil.swap(queue,j,k); =$b^X?x
k = j; ,pf<"^li
} &:'Uh W-t
} \J9@p
oEKLuy
} sbkWJy
,/o<OjR
} M@8 <^CK
ZIpL4y =_
SortUtil： H$1R\rE`
lm]4zs /A
package org.rut.util.algorithm; MK~viSgi
/pX\)wi
import org.rut.util.algorithm.support.BubbleSort; e:!&y\'"9
import org.rut.util.algorithm.support.HeapSort; Cd6^aFoK!
import org.rut.util.algorithm.support.ImprovedMergeSort; LA"`8
import org.rut.util.algorithm.support.ImprovedQuickSort; Bv!j.$0d{
import org.rut.util.algorithm.support.InsertSort; /Pi{Mv eZM
import org.rut.util.algorithm.support.MergeSort; =AZ>2P
import org.rut.util.algorithm.support.QuickSort; 9{xP~0g
import org.rut.util.algorithm.support.SelectionSort; |910xd`Z
import org.rut.util.algorithm.support.ShellSort; C4Bh#C
g4I(uEJk
/** *Pw;;#\B
* @author treeroot mm:\a-8j
* @since 2006-2-2 Os?~U/
* @version 1.0 8BLtTpu
*/ x*bM C&Ea
public class SortUtil { KcNEB_i
public final static int INSERT = 1; \gj@O5rGP
public final static int BUBBLE = 2; }2V|B4
public final static int SELECTION = 3; 3x'BMAA+
public final static int SHELL = 4; *Swb40L^
public final static int QUICK = 5; b/5;377_
public final static int IMPROVED_QUICK = 6; /-G;#Wm
public final static int MERGE = 7; ~G5)ya-
public final static int IMPROVED_MERGE = 8; <\2,7K{{+;
public final static int HEAP = 9; j"J2&Y2
M<g>z6
public static void sort(int[] data) { LuR.;TiW
sort(data, IMPROVED_QUICK); 9$UjZ$ v
} .T4"+FTzP
private static String[] name={ NaB8cLURp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n1.]5c3p
}; ;se-IDN
N7}.9%EV
private static Sort[] impl=new Sort[]{ N<Ti[Q]G
new InsertSort(), !t~S.`vF
new BubbleSort(), 3vNoD
new SelectionSort(), |2{y'?,
new ShellSort(), Mq6.!j
new QuickSort(), .CrahV1G
new ImprovedQuickSort(), :m^eNS6:
new MergeSort(), C!RxMccTh
new ImprovedMergeSort(), GwW!Q|tVz=
new HeapSort() +anNpy
}; &7|=8Z[o
sT'wps2
public static String toString(int algorithm){ 1&Nk
return name[algorithm-1]; 4vp,izNW
} _@jl9<t=_
WR gAc%
public static void sort(int[] data, int algorithm) { ,MuLu,$/
impl[algorithm-1].sort(data); OHM.xw*?.
} &{/ `Q,
p>|;fS\`@}
public static interface Sort { B.0(}@
public void sort(int[] data); yxLGseD
} KzI$GU3
)bw^!w)
public static void swap(int[] data, int i, int j) { q ( H^H
int temp = data; 8WfF: R;
data = data[j]; )uZ<?bkQ
data[j] = temp; >vt#,8VAN
} 2syKYHV
} $PHKI B(