[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; &M{;[O{
} L%;[tu(*
int i1=l; ;LqpX!Pi f
int i2=mid+1; mnL+@mm
for(int cur=l;cur<=r;cur++){ kwUy^"O
if(i1==mid+1) zEk/15
data[cur]=temp[i2++]; ,{X}C
else if(i2>r) qT~a`ou:
data[cur]=temp[i1++]; \wF-[']N
else if(temp[i1] data[cur]=temp[i1++]; W5,&*mo
else t W}"PKv
data[cur]=temp[i2++]; MFQyB+Z
} IxaF*4JG
} u~7fK
E<sd\~~A:
} JA~q}C7A7o
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改进后的归并排序: +t%1FkI\
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package org.rut.util.algorithm.support; {"c`k4R
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import org.rut.util.algorithm.SortUtil; otbr8&?-
eY[kUMo
/** j]C}S*`"
* @author treeroot 'P)c'uqd#
* @since 2006-2-2 X& mD/1
* @version 1.0 H3LuRGe&2
*/ HZqk)sN
public class ImprovedMergeSort implements SortUtil.Sort { gY!?JZC-0
{5]c\_.
private static final int THRESHOLD = 10; 72ZoN<c
h"7~`!"~
/* XK&G`cJ[
* (non-Javadoc) -2'1KAk-W
* q_cP<2`@V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1my1m
*/ 8SA" bH:
public void sort(int[] data) { +o?;7
int[] temp=new int[data.length]; n8tw8o%&[
mergeSort(data,temp,0,data.length-1); 9yz@hdG
} %n6NVi_[
!e:_$$j
private void mergeSort(int[] data, int[] temp, int l, int r) { Qk >9o
int i, j, k; E0AbVa.
int mid = (l + r) / 2; vXm'ARj
if (l == r) ne: 'aq
return; vi28u xc
if ((mid - l) >= THRESHOLD) +)LCYDRV7
mergeSort(data, temp, l, mid); }U'
else mLx=Zes:.
insertSort(data, l, mid - l + 1); bYO['ORr@
if ((r - mid) > THRESHOLD) !jvl"+_FV
mergeSort(data, temp, mid + 1, r); 3CH>!QOA
else fN/;BT
insertSort(data, mid + 1, r - mid); (&Rql7](8
~ #7@;C<nt
for (i = l; i <= mid; i++) { 8@Bm2?$}g
temp = data; &(lQgi+^!
} F^Bk @
for (j = 1; j <= r - mid; j++) { v: veKA
temp[r - j + 1] = data[j + mid]; yf7|/M
} Mh{244|o[
int a = temp[l]; 5'(T*"
int b = temp[r]; 33; '6/
for (i = l, j = r, k = l; k <= r; k++) { QQHQ3\
if (a < b) { NcBz("
data[k] = temp[i++]; 4/%Y@Z5
a = temp; nRvaCAt^
} else { yj=OR|v
data[k] = temp[j--]; \d*ts(/a*
b = temp[j]; \~g,;>%7Y
} 'iTY?
} c8Q}m(bhWI
} Xmi~fie
qV;I<AM
/** 9J?lNq
* @param data /EG'I{oC
* @param l o".,JnbXl
* @param i '4_c;](W
*/ >bd@2au9!
private void insertSort(int[] data, int start, int len) { ~sZ$`t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KK6fRtKv>q
} P*H0Hwn;
} S}a]Bt
} :%Oz:YxC/
} e"_kH_7sv
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堆排序： d14n>
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package org.rut.util.algorithm.support; Oxa8ue?
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import org.rut.util.algorithm.SortUtil; %`QgG
Q6wa-Y,
/** 8d2\H*a9~
* @author treeroot .rITzwgB
* @since 2006-2-2 _9JFlBx
* @version 1.0 hO&_VCk
*/ }Z{FPW.QK
public class HeapSort implements SortUtil.Sort{ !l=)$RJKdD
YCQ$X
/* (non-Javadoc) uT'l.*W6i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ];lZ:gT
*/ e#,(a
public void sort(int[] data) { &q@brX<,=
MaxHeap h=new MaxHeap(); .6T0d 4,1
h.init(data); Q4hY\\Hi
for(int i=0;i h.remove(); R :(-"GW'
System.arraycopy(h.queue,1,data,0,data.length); 6M.|W;
} \=7jp|{Yl
Mm(#N/
private static class MaxHeap{ %1:caa@_p
-- FzRO{D
void init(int[] data){ JSi0-S[Y{
this.queue=new int[data.length+1]; k_!e5c
for(int i=0;i queue[++size]=data; fIl!{pv[
fixUp(size); jw9v&/-
} _Z!@#y@j
} 8#VD u(
2aX*|DGpw
private int size=0; f*B-aj#
yi*EobP
private int[] queue; A=5Ebu!z
R^$|D)(
public int get() { ;Xy=;Z.]i
return queue[1]; 2,F9P+
} '5 ~cd
as|w} $
public void remove() { PCHspe9!y
SortUtil.swap(queue,1,size--); )Z:D}r8[
fixDown(1); `:;q4zij;
} Ei):\,Nv
file://fixdown FOk;=+
private void fixDown(int k) { @aZTx/
int j; P!E2.K,
while ((j = k << 1) <= size) { 5K2K'ZkI
if (j < size %26amp;%26amp; queue[j] j++; Z#L4n#TT
if (queue[k]>queue[j]) file://不用交换 V^&*y+
break; 5.oIyC^Ik
SortUtil.swap(queue,j,k); 1kKfFpN
k = j; g+4y^x(X@1
} P3: t 4^
} Hj|&P/jY]*
private void fixUp(int k) { 4&;iORw&E4
while (k > 1) { BhzDV
int j = k >> 1; <y] 67:"<v
if (queue[j]>queue[k]) QcW8A ,\q
break; 3_Xu3hNH!
SortUtil.swap(queue,j,k); >>,G3/Zd*
k = j; F{!pii5O9
} No} U[u.O
} z__?kY
|Z<\kx
} n)98NSVDbT
,`Y$}"M4
} >*8V]{f9
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SortUtil： m]!hP^^
)/%5f{+}
package org.rut.util.algorithm; P+}~6}wJE
ft6)n T/"&
import org.rut.util.algorithm.support.BubbleSort; 8zD>t~N2C
import org.rut.util.algorithm.support.HeapSort; !43!JfD
import org.rut.util.algorithm.support.ImprovedMergeSort; l^9gFp~I
import org.rut.util.algorithm.support.ImprovedQuickSort; NBY|U{.g
import org.rut.util.algorithm.support.InsertSort; X<}}DZSu a
import org.rut.util.algorithm.support.MergeSort; L|T?,^
import org.rut.util.algorithm.support.QuickSort; Rbf6/C
import org.rut.util.algorithm.support.SelectionSort; , :#bo]3
import org.rut.util.algorithm.support.ShellSort; YE{ [f@i0
.{h"0<x
/** BZ?Ck[E]Z
* @author treeroot |cf-S8pwY
* @since 2006-2-2 TXmS$q
* @version 1.0 d@$|zr6
*/ pWGR#x'
public class SortUtil { ]`|$nU}v
public final static int INSERT = 1; w,LmAWZ4Y
public final static int BUBBLE = 2; {:K_=IRZ
public final static int SELECTION = 3; [3G{NC|'
public final static int SHELL = 4; L^ J|cgmNw
public final static int QUICK = 5; w3(|A> s3
public final static int IMPROVED_QUICK = 6; q[a\a7U z
public final static int MERGE = 7; %-540V{q
public final static int IMPROVED_MERGE = 8; 78uImC*o
public final static int HEAP = 9; q2vD)r
1N8] ~j
public static void sort(int[] data) { UxTLr-db^
sort(data, IMPROVED_QUICK); lD0-S0i
} D4!;*2t
private static String[] name={ V|97;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C~qZ&
}; nc k/Dw
1@}F8&EZ
private static Sort[] impl=new Sort[]{ <|}Z6Ti
new InsertSort(), `Npa/Q
new BubbleSort(), xo_STLAw
new SelectionSort(), rMDvnF
new ShellSort(), {Ya$Q#l
new QuickSort(), Uz^N6q
new ImprovedQuickSort(), {fR\yWkt?
new MergeSort(), cERIj0~
new ImprovedMergeSort(), -[7+g
new HeapSort() ?ZlXh51
}; q!z"YpYB
SH{@yS[c!
public static String toString(int algorithm){ xz8e1M
return name[algorithm-1]; ltNCti{Q
} o+E~iCu5
'^m.vS!/
public static void sort(int[] data, int algorithm) { 3\XNOJH
impl[algorithm-1].sort(data); cmG27\cRO
} [<RhaZz
x|~8?i$%
public static interface Sort { /grTOf&
public void sort(int[] data); f,TW|Y'{g
} MeEa|.
TUcFx_
public static void swap(int[] data, int i, int j) { "/Qz?1>l+
int temp = data; M%S7cIX ]F
data = data[j]; ?'MkaG0g
data[j] = temp; [gmov)\c
} -qIi.]/f"9
} f CU]