[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; ,=O`'l>K
} AV Gu*
int i1=l; +(x^5~QX
int i2=mid+1; O%H_._#N`
for(int cur=l;cur<=r;cur++){ cTCo~Pk4
if(i1==mid+1) MIo<sJuv
data[cur]=temp[i2++]; k*(c8/<.d
else if(i2>r) q&Y'zyHLP
data[cur]=temp[i1++]; gS_)(
else if(temp[i1] data[cur]=temp[i1++]; ;n%SjQ'%
else 8>x!n/z)
data[cur]=temp[i2++]; nBI?~hkP3
} u=z$**M^
} = I,O+^
V&;1n
} J 05@SG':
Yz=(zj
改进后的归并排序: OXe+=Lp<
onRxe\?D(
package org.rut.util.algorithm.support; gELku .
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import org.rut.util.algorithm.SortUtil; K#rfQ0QK/!
K*&M:u6E
/** Py$Q]s?\1
* @author treeroot eqU2>bIf
* @since 2006-2-2 VR ^qwS/
* @version 1.0 RbzSQr>a\
*/ /:3:Ky3
public class ImprovedMergeSort implements SortUtil.Sort { lYmqFd~p
f uQbDb&
private static final int THRESHOLD = 10; AD#]PSB
T$T:~8tK3
/* Aayh'xQ
* (non-Javadoc) |t+M/C0y/
* g6{.C7m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .<`i!Ls
*/ M(|Qvh{Q6
public void sort(int[] data) { v".q578 0B
int[] temp=new int[data.length]; 1j0OV9-|
mergeSort(data,temp,0,data.length-1); \ZX5dFu0
} T]-yTsto
d9>*a$x;/
private void mergeSort(int[] data, int[] temp, int l, int r) { k"D6Vyy`
int i, j, k; XTEC0s"F
int mid = (l + r) / 2; ~T@t7Cg
if (l == r) BZejqDr*
return; x|U~?
if ((mid - l) >= THRESHOLD) F-[zuYGp
mergeSort(data, temp, l, mid); 7[h_"@_A7
else XK??5'&{
insertSort(data, l, mid - l + 1); &[:MTK?x!
if ((r - mid) > THRESHOLD) ;Pf |\q
mergeSort(data, temp, mid + 1, r); sd9$4k"
else i!+D ,O
insertSort(data, mid + 1, r - mid); F1)B-wW
vQ/}E@?u
for (i = l; i <= mid; i++) { yI/2 e[
temp = data; }P(RGKQZ"
} :xJ]# t..
for (j = 1; j <= r - mid; j++) { B!-hcn]y
temp[r - j + 1] = data[j + mid]; }/&Q\Sc
} (XA=d 4
int a = temp[l]; R,R[.2Vi
int b = temp[r]; Cw42bO
for (i = l, j = r, k = l; k <= r; k++) { 7K.&zn
if (a < b) { J!5BH2bg
data[k] = temp[i++]; U/F<r3.`#
a = temp; _OV\W'RrA
} else { mAMi-9
data[k] = temp[j--]; **_`AM~
b = temp[j]; D,q=?~
} t\~lGG-p
} i)9}+M5
} pYZ6-s
QR4rQu
/** Atl`J.;G
* @param data :W]?6=
* @param l aEU[k>&
* @param i e9e%8hL
*/ KiW4>@tY
private void insertSort(int[] data, int start, int len) { e~R; 2bk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .{sKEVK
} <"A|Xv'Q
} ^?PU:eS
} Z0&^U#]
} <i{O\K]9
N<lejZ}!q
堆排序： w1HE^ /
rt">xVl
package org.rut.util.algorithm.support; 7pMl:\
h/~:}Bof
import org.rut.util.algorithm.SortUtil; r>73IpJI
#p&&w1
/** h'VN& T,
* @author treeroot ?_mcg8A@@*
* @since 2006-2-2 (ii6w d<*
* @version 1.0 x,$N!X
*/ @(>XSTh9
public class HeapSort implements SortUtil.Sort{ Gt#Jr!N~
Fe 3*pUt
/* (non-Javadoc) }L Q9db1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yhdt"@;..
*/ 1HQh%dZZ
public void sort(int[] data) { ?#8',:
MaxHeap h=new MaxHeap(); r~cmrLQa
h.init(data); Y g>W.wA
for(int i=0;i h.remove(); &y` MDyXz
System.arraycopy(h.queue,1,data,0,data.length); ' >(])Oq,
} HQHFD0hv
1'ne[@i^/
private static class MaxHeap{ sX&.8
QZy+`
void init(int[] data){ )|;*[S4
this.queue=new int[data.length+1]; is=sV:j:
for(int i=0;i queue[++size]=data; +mRFHZG
fixUp(size); $=dp)
} V]b1cDx{
} &<I*;z6%t
*r!f! eA:
private int size=0; { 3``To$
m87,N~DP
private int[] queue; k=w;jX&;`
mk>L:+
public int get() { -H1mKZDPP
return queue[1]; 2p\CCzw
} ~wnTl[:
6OYXcPW'
public void remove() { #Mo`l/Cwp
SortUtil.swap(queue,1,size--); n8(B%KF
fixDown(1); p7(Pymkd
} '\%c"?
file://fixdown V:F;Nq%+j
private void fixDown(int k) { w0QN5?
int j; e&[gde(
while ((j = k << 1) <= size) { qW]gp7jK4
if (j < size %26amp;%26amp; queue[j] j++; >)ZX
if (queue[k]>queue[j]) file://不用交换 Ov3W;jD
break; 9k\`3SE
SortUtil.swap(queue,j,k); =! v.VF\;
k = j; ;t47cUm6j
} H5t 9Mg|
} (H*-b4]/
private void fixUp(int k) { "8K>Yu17
while (k > 1) { R'a%_sACj>
int j = k >> 1; wu?ahNb.`Y
if (queue[j]>queue[k]) pAS!;t=n,
break; u#5/s8
SortUtil.swap(queue,j,k); FFXDt"i2
k = j; .0]4@'
} wUzQ`h2
} "%~\kJ(G
v+-f pl&
} U$a Eby.
SsA;T5:6
} G yZYP\'S+
8+vZ9!7
SortUtil： L'{;V\d
A.7:.5Cx'
package org.rut.util.algorithm; Dd|}LV
g-'y_'%0G
import org.rut.util.algorithm.support.BubbleSort; zx^]3}
import org.rut.util.algorithm.support.HeapSort; h}xUZ:
import org.rut.util.algorithm.support.ImprovedMergeSort; #1R_* Uh
import org.rut.util.algorithm.support.ImprovedQuickSort; }aYm86C]
import org.rut.util.algorithm.support.InsertSort; 9@AGx<S1
import org.rut.util.algorithm.support.MergeSort; @k~?h=o\b
import org.rut.util.algorithm.support.QuickSort; ToNi<~
import org.rut.util.algorithm.support.SelectionSort; 8?] :>
import org.rut.util.algorithm.support.ShellSort; '$Jt}O
eydVWVN
/** Z&8 7Aj
* @author treeroot GF~^-5
* @since 2006-2-2 *nNzhcuR
* @version 1.0 -oq!zi4:
*/ 4mOw[}@A
public class SortUtil { PpMZ-f@
public final static int INSERT = 1; '|^LNAx
public final static int BUBBLE = 2; dJ\6m!Mp
public final static int SELECTION = 3; .lu:S;JSnS
public final static int SHELL = 4; Rde_I`Ru
public final static int QUICK = 5; >4TJH lB}8
public final static int IMPROVED_QUICK = 6; FzmCS@yA
public final static int MERGE = 7; k*|dX.C:
public final static int IMPROVED_MERGE = 8; 2rHw5Wn]~
public final static int HEAP = 9; Wu)ATs}
Sp)KtMV
public static void sort(int[] data) { SCeZt [
sort(data, IMPROVED_QUICK); RAKQ+Y"nl
} ANSvZqKh
private static String[] name={ 9[DQ[bL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nPq\J~M
}; ~\dpD
>_M}l@1
private static Sort[] impl=new Sort[]{ >V(>2eD'S
new InsertSort(), .jMm-vox}
new BubbleSort(), mFayU w
new SelectionSort(), N>`+{
new ShellSort(), "M6a_rZ2W
new QuickSort(), FW7+!A&F
new ImprovedQuickSort(), !s,<hU#
new MergeSort(), O%9Cq}*
new ImprovedMergeSort(), 'R*gSqx~
new HeapSort() =1^a/
}; IyG5Rj2
(PGmA>BT
public static String toString(int algorithm){ (Br$(XJoK}
return name[algorithm-1]; `.;7O27A^%
} cb&y8!ci~
t )Z2"_5
public static void sort(int[] data, int algorithm) { 5X&<+{bX
impl[algorithm-1].sort(data); Bir}X
} oSNB\G<
0w\X
public static interface Sort { fEs957$
public void sort(int[] data); `'Ta=kd3
} ;t%L(J
|PH]0.m5
public static void swap(int[] data, int i, int j) { !~UI~-i'
int temp = data; OfTcF_%
data = data[j]; xmKa8']x
data[j] = temp; yG&kP:k<
} /6{`6(p
} B2d$!Any