[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; }mIN)o
} &IzNoB
int i1=l; w3sU& |N
int i2=mid+1; UA2KY}pz5
for(int cur=l;cur<=r;cur++){ 5~jz| T}s
if(i1==mid+1) U] GD6q
data[cur]=temp[i2++]; "M /Cl|z
else if(i2>r) n=F rv*"Z
data[cur]=temp[i1++]; Mlo,F1'?>
else if(temp[i1] data[cur]=temp[i1++]; 5G(dvM-n
else Yo'Y-h#
data[cur]=temp[i2++]; p=E#!cn3
} oD\t4]?E
} 2Vf242z_
@n.n[zb\|
} cqJXZ.XC
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改进后的归并排序: Z2})n -
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package org.rut.util.algorithm.support; 1i~q~O,
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import org.rut.util.algorithm.SortUtil; _(8#
!5?_)
/** _Z9d.-
* @author treeroot .s,04xW\
* @since 2006-2-2 _xm<zy{`S
* @version 1.0 }d>.Nj#zh
*/ QKq4kAaJ!
public class ImprovedMergeSort implements SortUtil.Sort { p}pd&ut1
wuYak"KX
private static final int THRESHOLD = 10; 3c,4 wyn
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/* #Y=b7|l
* (non-Javadoc) U!uJ)mm
* E0fMFG^P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~|O;Sdo=
*/ "Ueq
public void sort(int[] data) { 9*K-d'm
int[] temp=new int[data.length]; P!IA;i
mergeSort(data,temp,0,data.length-1); ob2_=hQnC
} 4u%AZ<-C}m
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private void mergeSort(int[] data, int[] temp, int l, int r) { s5mJ -
int i, j, k; 3F!)7
int mid = (l + r) / 2; *c/V('D/
if (l == r) m;{HlDez
return; !9KDdU
if ((mid - l) >= THRESHOLD) W#NZnxOX"
mergeSort(data, temp, l, mid); \#Jq%nd
else -=gI_wLbM
insertSort(data, l, mid - l + 1); %W7%]Z@j
if ((r - mid) > THRESHOLD) _D?/$D7u#%
mergeSort(data, temp, mid + 1, r); fjy\Q
else ]u$tKC
insertSort(data, mid + 1, r - mid); W'"?5} (
h4 9q(085V
for (i = l; i <= mid; i++) { eWex/ m
temp = data; fiA8W
} XxdD)I
for (j = 1; j <= r - mid; j++) { 6Y,&q|K
temp[r - j + 1] = data[j + mid]; MaY_*[
} 0uW)&>W
int a = temp[l]; UYJ>L
int b = temp[r]; +}?%w|8||s
for (i = l, j = r, k = l; k <= r; k++) { Al8Dw)uG{
if (a < b) { ?Sa,n^b*H
data[k] = temp[i++]; +6jGU'}[
a = temp; q. Jx|x
} else { \ctzv``/n
data[k] = temp[j--]; $!9/s S?
b = temp[j]; ip}%Y6Wj
} h?OSmzRLd
} biS[GyQ
} /<$|tp\Rc
_RxnB?
/** fS|e{!iI"
* @param data u?MhK#Mr
* @param l Hf_ pe
* @param i sn^ 3xAF
*/ .|07IH/Di{
private void insertSort(int[] data, int start, int len) { \#w8~+`Gq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c7@/<*E+
} kv2o.q
} {fl[BX]kZ
} LK*9`dzv=G
} `fX\pOk~e
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堆排序： ;R2A>f~
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package org.rut.util.algorithm.support; er1XZ
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import org.rut.util.algorithm.SortUtil; L[*cbjt[
nXb_\9E
/** K8BlEF`
* @author treeroot Je9Z:s[
* @since 2006-2-2 4 Sk@ v
* @version 1.0 c1+z(NQ3
*/ iiJT%Zq`#
public class HeapSort implements SortUtil.Sort{ y $uq`FW
l$c/!V[3
/* (non-Javadoc) iWr #H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /c-k{5mH%
*/ L?0IUGY
public void sort(int[] data) { \eQPvkx2
MaxHeap h=new MaxHeap(); Ph.RWy")
h.init(data); 4h--x~ @
for(int i=0;i h.remove(); 04v ~K
System.arraycopy(h.queue,1,data,0,data.length); \vc&V8
} ~~k0&mK|Q
s}` |!Vyl
private static class MaxHeap{ cyHbAtl
%Y'/_ esH2
void init(int[] data){ q8/k$5E
this.queue=new int[data.length+1]; S\t!7Xs%*U
for(int i=0;i queue[++size]=data; ebCS4&c
fixUp(size); #EE<MKka
} PlA#xnq#
} 8L/XZ)
tq'hiS(b
private int size=0; s%Ph
jR\!2!
private int[] queue; 40].:9VG
udr|6EjD.
public int get() { BOM0QskLf
return queue[1]; ,d_rK\J
} N!dBF t"
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public void remove() { 9yTkZ`M28
SortUtil.swap(queue,1,size--); mA,{E-T
fixDown(1); f8r7SFwUv
} +/mCYI
file://fixdown _G<Wq`0w)
private void fixDown(int k) { G}NqVbZ9]
int j; ><S2o%u~
while ((j = k << 1) <= size) { 5pY|RV6:
if (j < size %26amp;%26amp; queue[j] j++; DQV9=
if (queue[k]>queue[j]) file://不用交换 &1yErGXC
break; E U RKzJk
SortUtil.swap(queue,j,k); ls9Y?
k = j; y<R5}F
} Da6l=M
} |)%H_TXTy
private void fixUp(int k) { B]gyj
while (k > 1) { W)
int j = k >> 1; #{?RE?nD
if (queue[j]>queue[k]) FS @55mQ
break; @t$yg$Q?[
SortUtil.swap(queue,j,k); /.A"HGAk
k = j; ZXiJ5BZ
} ' \>k7?@
} *tR'K#:&g!
2dJE`XL
} Rx&.,gzj[
LXrk5>9
} wCv9VvF`
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SortUtil： !lsa5w{
z}$.A9yn
package org.rut.util.algorithm; [GI2%uA0
sVmqx^-
import org.rut.util.algorithm.support.BubbleSort; *u,&?fCl
import org.rut.util.algorithm.support.HeapSort; I7Abf7>*Q
import org.rut.util.algorithm.support.ImprovedMergeSort; v6L]3O1
import org.rut.util.algorithm.support.ImprovedQuickSort; mO]dP;,
import org.rut.util.algorithm.support.InsertSort; 5K$<Ad4$b
import org.rut.util.algorithm.support.MergeSort; ).e}.Z6[i`
import org.rut.util.algorithm.support.QuickSort; <W7WlT
import org.rut.util.algorithm.support.SelectionSort; unz~vG1Tn
import org.rut.util.algorithm.support.ShellSort; .V_5q:tu
Z:x`][vg
/** [Ran/D\.
* @author treeroot OBF-U]?Y
* @since 2006-2-2 toOdL0hCe
* @version 1.0 hV) `e"r\s
*/ y )<+?@sP
public class SortUtil { SXJjagAoML
public final static int INSERT = 1; 7,alZ"%W
public final static int BUBBLE = 2; fN<Y3^i"
public final static int SELECTION = 3; seP h%Sa_
public final static int SHELL = 4; 1Id"|/b%$
public final static int QUICK = 5; @"^7ASd%
public final static int IMPROVED_QUICK = 6; JdWav!PYm
public final static int MERGE = 7; {'{9B
public final static int IMPROVED_MERGE = 8; wHx_lsY;
public final static int HEAP = 9; 8.IenU9
ZIh)D[n
public static void sort(int[] data) { cdSgb3B0
sort(data, IMPROVED_QUICK); >+!Ef
} EaL>~:j
private static String[] name={ /Q:mUd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mWn0"1C
}; plJUQk
{9XNh[NbP
private static Sort[] impl=new Sort[]{ "}-S%v`)z
new InsertSort(), *ywr_9
new BubbleSort(), 7;Q4k"h
new SelectionSort(), ;3bUgI}.J
new ShellSort(), 3QdCu<eBZ
new QuickSort(), em- <V5fb
new ImprovedQuickSort(), H5UF r,t
new MergeSort(), ^/x\HGrw
new ImprovedMergeSort(), Rs"G8Q9Q
new HeapSort() n)35-?R/M
}; 'W("s
%yl17:h#
public static String toString(int algorithm){ A McZm0c`
return name[algorithm-1]; Y)(yw \&v
} `}bvbvmA
<nN# K{AH
public static void sort(int[] data, int algorithm) { tAY{+N]f
impl[algorithm-1].sort(data); .EH1;/
} d 792#Dc
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public static interface Sort { <Kl$ek8
public void sort(int[] data); zE/\2F$
} ]0|A\bE\S
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public static void swap(int[] data, int i, int j) { B/!/2x
int temp = data; \W= qqE]
data = data[j]; fWi/mK3c
data[j] = temp; V s=o@
} ?Drq!?3PDc
} Ve)BF1YG