[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; (k45k/PAP
} =,]M$M
int i1=l; %V/]V,w:*R
int i2=mid+1; wUndNE
for(int cur=l;cur<=r;cur++){ YT8`Vz$+
if(i1==mid+1) [i_x 1
data[cur]=temp[i2++]; {`55nwd
else if(i2>r) xn[di-LF
data[cur]=temp[i1++]; Xs_y!l
else if(temp[i1] data[cur]=temp[i1++]; 2uEu,YC
else N*W.V,6yH
data[cur]=temp[i2++]; AG2jl/
} c5pG?jr+d
} e)7r
#YdU,y=B
} ?sE21m?b-
gV BV@v!W
改进后的归并排序: OwUbm0)h^V
X=~QE}x
package org.rut.util.algorithm.support; #n r1- sf|
GK+w1%6)
import org.rut.util.algorithm.SortUtil; y0]O 6.{
sqRuqUj+
/** Vo[4\h#$
* @author treeroot 2T5ZbXc+x
* @since 2006-2-2 *ni|I@8
* @version 1.0 iL<O|'be
*/ J$[Vm%56
public class ImprovedMergeSort implements SortUtil.Sort { Sa5y7
eH6cBX#P.
private static final int THRESHOLD = 10; cB^lSmu5
Gx($q;8
/* l:HuG!
* (non-Javadoc) e+U o-CO
* Vo()J4L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6WZp&pO
*/ <D}k@M Z
public void sort(int[] data) { K~R{q+
int[] temp=new int[data.length]; C/G[B?:h
mergeSort(data,temp,0,data.length-1); j/&7L@Y
} 7dZ!GX?\y
{rQ`#?J}^?
private void mergeSort(int[] data, int[] temp, int l, int r) { 8wOPpdc
int i, j, k; ,H8Pmn?
int mid = (l + r) / 2; 7 pV3#fQ
if (l == r) uDR(^T{g#
return; L\I/2aiE
if ((mid - l) >= THRESHOLD) ~MF. M8
mergeSort(data, temp, l, mid); _nUuiB>
else (X/JXu{
insertSort(data, l, mid - l + 1); "^`AS"z'
if ((r - mid) > THRESHOLD) qS>el3G
mergeSort(data, temp, mid + 1, r); A\>qoR!Y
else &/p9+gd
insertSort(data, mid + 1, r - mid); X*@Sj;|m
; V8 =B8w
for (i = l; i <= mid; i++) { sKtH4d5)
temp = data; >b0}X)Z+U
} }<p%PyM
for (j = 1; j <= r - mid; j++) { I]58;|J
temp[r - j + 1] = data[j + mid]; L 'y+^L|X
} vHmn)d1pl
int a = temp[l]; b.(^CYYQ
int b = temp[r]; 7JbrIdDl|
for (i = l, j = r, k = l; k <= r; k++) { #%~wuCn<K
if (a < b) { u}$3.]-.?T
data[k] = temp[i++]; kmwFw>#
a = temp; $v,_8{ !
} else { xp= ]J UQ
data[k] = temp[j--]; n7vi@^lf(
b = temp[j]; hdzaU&w
} p6p_B
} h1$,
} PYGHN T
*P>F# ~X
/** ~7|z2L
* @param data ^<c?Ire
* @param l K2JS2Y]
* @param i H|]Q;,C
*/ x\WKsc
private void insertSort(int[] data, int start, int len) { ``{xm1GK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GI/o!0"_
} 70@:!HI]
} bA:abO
} q-'zZ#
} 8l6R.l
1QThAFN
堆排序： @L0.Z1 ).
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package org.rut.util.algorithm.support; }QK-@T@4<
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import org.rut.util.algorithm.SortUtil; B4%W,F:@
h8Gp>b
/** "\30YO>\
* @author treeroot *5^h>Vk/
* @since 2006-2-2 :0/I2:
* @version 1.0 ;TYkJH"
*/ ~~&M&Fe
public class HeapSort implements SortUtil.Sort{ k2~j:&p
-O\`G<s%
/* (non-Javadoc) yfj<P/aA+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u7K0m! jW
*/ 1:?WvDN=
public void sort(int[] data) { \7RP6o
MaxHeap h=new MaxHeap(); qbjRw!2?w
h.init(data); o4xZaF4+
for(int i=0;i h.remove(); :7'anj
System.arraycopy(h.queue,1,data,0,data.length); \O[Cae:^?
} n,`&f~tap
`3~w#?+=*
private static class MaxHeap{ [dL#0~CL$
rLVS#M#&e>
void init(int[] data){ /J^yOR9
this.queue=new int[data.length+1]; O3S_P]{*ny
for(int i=0;i queue[++size]=data; mU;TB%#)
fixUp(size); yA~W|q(/V
} N7XRk=J
} krgsmDi7
_("{fJ,A
private int size=0; o`G@Je_}x
>Py=H+d!j
private int[] queue; UPH:$Fk&
F[LBQI`zq
public int get() { RX'( l
return queue[1]; pl5!Ih6
} M*nfWQ a
|VIBSty2d
public void remove() { k z<We/
SortUtil.swap(queue,1,size--); )tB mSVprl
fixDown(1); R4{2+q=0
} )]'?yS"
file://fixdown 13Q|p,^R
private void fixDown(int k) { ^$VOC>>9
int j; E}UlQq
while ((j = k << 1) <= size) { H13|bM<
if (j < size %26amp;%26amp; queue[j] j++; dAR):ZKq?
if (queue[k]>queue[j]) file://不用交换 [E+#+-n7
break; 1N2s[ \q$
SortUtil.swap(queue,j,k); m8.sHw
k = j; 99vm7"5hQ
} 9M<{@<]dm
} d+$a5 [^9
private void fixUp(int k) { c8A //
while (k > 1) { !$P&`n]@
int j = k >> 1; S7@.s`_{w
if (queue[j]>queue[k]) G0^NkH,k
break; 0GEK xV\F
SortUtil.swap(queue,j,k); F]xo*
k = j; '6WaG hvO
} 1qtu,yIf
} in$Pk$ c
D{~I
} 5F$W^N
smJ%^'x
} |nIm$p'
7i`8 c =.
SortUtil： |oa9 g2
IWX%6*Zz
package org.rut.util.algorithm; d n3sh<
R["_Mff
import org.rut.util.algorithm.support.BubbleSort; ^8-CUH\
import org.rut.util.algorithm.support.HeapSort; j*xxOwf
import org.rut.util.algorithm.support.ImprovedMergeSort; {x s{
import org.rut.util.algorithm.support.ImprovedQuickSort; k1W q$KCwG
import org.rut.util.algorithm.support.InsertSort; iXeywO2nP
import org.rut.util.algorithm.support.MergeSort; zmF_-Q`c
import org.rut.util.algorithm.support.QuickSort; r!'\$(m E
import org.rut.util.algorithm.support.SelectionSort; [;%qxAB/_
import org.rut.util.algorithm.support.ShellSort; 1t6VS3
5\lOZYHX
/** F.zn:yX5
* @author treeroot H1]G<N3
* @since 2006-2-2 qdWsP9}q
* @version 1.0 v<$a .I(
*/ hT]\*},
public class SortUtil { X0O@,
public final static int INSERT = 1; #}3$n/
public final static int BUBBLE = 2; WbB0{s
public final static int SELECTION = 3; +Ccj@#M;
public final static int SHELL = 4; X2v|O3>/N
public final static int QUICK = 5; @#xh)"}
public final static int IMPROVED_QUICK = 6; blEs!/A`
public final static int MERGE = 7; {dTtYL$'"
public final static int IMPROVED_MERGE = 8; @|sDb?J
public final static int HEAP = 9; A70x+mjy^T
=y.?=`"
public static void sort(int[] data) { |p}qK Fdi
sort(data, IMPROVED_QUICK); /z9oPIJ=*
} QE1DTU
private static String[] name={ #**vIwX-Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3!ZndWSHV
}; A@^Y2:pY
}j;*7x8(
private static Sort[] impl=new Sort[]{ *DcJ).
new InsertSort(), :_X9x{
new BubbleSort(), (< gk<e*
new SelectionSort(), gZ8n[zxf6
new ShellSort(), H:TRJ.!w2
new QuickSort(), ju~js
new ImprovedQuickSort(), HG{r\jh
new MergeSort(), W{B)c?G]
new ImprovedMergeSort(), B@U;[cO&
new HeapSort() >,wm-4&E
}; bxLeQWr6
)2~Iqzc4
public static String toString(int algorithm){ Ev+m+
return name[algorithm-1]; Z:j6AF3;
} b=(?\
w,f1F;!q1
public static void sort(int[] data, int algorithm) { '7Q5"M'
impl[algorithm-1].sort(data); XpFW(v
} 1w*DU9f
U51C /A
public static interface Sort { &]~Vft l
public void sort(int[] data); qn=~4rg]R
} I*hCIy#;
g:V8"'
public static void swap(int[] data, int i, int j) { ]rU$0)VN
int temp = data; [Vzp D 4
data = data[j]; JO{Rth
data[j] = temp; WCJ$S\#
} QU{|S.\
} K)=<hL