[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; N%F4ug@i
} suS[P?4
int i1=l; 2){O&8A
int i2=mid+1; PJYUD5
for(int cur=l;cur<=r;cur++){ \U3v5|Q
if(i1==mid+1) ?<` ;lu/eL
data[cur]=temp[i2++]; ~F^tLi!5
else if(i2>r) %Gl1Qi+Po_
data[cur]=temp[i1++]; PIAE6,*
else if(temp[i1] data[cur]=temp[i1++]; nMK$&h,{
else k1.%ZZMM
data[cur]=temp[i2++]; c'>_JlG~
} f`)*bx
} #W&o]FAA3y
K)9Rw2-AJ
} JOz4O
pMJm@f
改进后的归并排序: |BUgsE
{- &`@V
package org.rut.util.algorithm.support; S=gby
@QMy!y_K~m
import org.rut.util.algorithm.SortUtil; L~%7=]m
I~;w Q
/** { V)`6
* @author treeroot +0?1"2
* @since 2006-2-2 58d[>0Xa[g
* @version 1.0 \wDL oR
*/ zW\s{
public class ImprovedMergeSort implements SortUtil.Sort { fTso[r:F.
mPhu#oK'f
private static final int THRESHOLD = 10; ,5x#o
S@'%dN6e
/* :..WL;gC
* (non-Javadoc) 5DDSo0E
* VEpcCK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tY>Zy1hlI
*/ T(qTipq0
public void sort(int[] data) { '#XT[\
int[] temp=new int[data.length]; QWnGolN
mergeSort(data,temp,0,data.length-1); vz~Oi
} q|:wzdmNZ
;NH^+h
private void mergeSort(int[] data, int[] temp, int l, int r) { z)(W x">
int i, j, k; )3)7zulnXH
int mid = (l + r) / 2; L+*:VP6WD
if (l == r) R+U$;r8l
return; hbg$u$1`,
if ((mid - l) >= THRESHOLD) M!kSt1
mergeSort(data, temp, l, mid); 'zbvg0T
else E#\Oe_eq~N
insertSort(data, l, mid - l + 1); BN `2UVH
if ((r - mid) > THRESHOLD) :G6aO
mergeSort(data, temp, mid + 1, r); "X^<g{]
else fZj,Q#}D
insertSort(data, mid + 1, r - mid); S43JaSw)
O,9^R
for (i = l; i <= mid; i++) { J&s$Wqf
temp = data; ^vPsp?
} d]Y;rqjue
for (j = 1; j <= r - mid; j++) { 0-[naGz
temp[r - j + 1] = data[j + mid]; Lg~C:BNF
} C[}UQod0
int a = temp[l]; Fuzb4Df
int b = temp[r]; \+#EO%sN1%
for (i = l, j = r, k = l; k <= r; k++) { y|)VNnWM
if (a < b) { }W'4(V;:
data[k] = temp[i++]; ,<* I5:
a = temp; n0!2-Q5U)h
} else { f@$W5*j
data[k] = temp[j--]; +ZwoA_k{
b = temp[j]; !:m.-TE
} 2Kf/Id1
} vc&v+5Y
} E*u*LMm
Pmo<t6
/** :dh; @kp
* @param data &92/qRh7
* @param l +]nIr'V
* @param i MqB@}!
*/ mEbI\!}H0
private void insertSort(int[] data, int start, int len) { eb}P/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *!ng)3#
} Ps>:|j+
} .}/8]
} $L8>Ha}
} rD~/]y)t
0cE9O9kE
堆排序： 0U@#&pUc
}L)[>
package org.rut.util.algorithm.support; &hO-6(^I
;aV3j/
import org.rut.util.algorithm.SortUtil; L FkDb}
5h&sdzfG
/** aZ4?!JW.
* @author treeroot kqm(D#
* @since 2006-2-2 O7Jux-E1C
* @version 1.0 RARA_tii
*/ 50QDqC-]XS
public class HeapSort implements SortUtil.Sort{ ,puoq{
5, ,~k=
/* (non-Javadoc) C@6:uiT$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7H5VzV
*/ ewU*5|*[
public void sort(int[] data) { [9${4=Kq
MaxHeap h=new MaxHeap(); J?w_DQa
h.init(data); XZ~kXE;B(
for(int i=0;i h.remove(); YD'gyP4
System.arraycopy(h.queue,1,data,0,data.length); XQ]vJQYIR
} Q $}#&
\0x>#ygX
private static class MaxHeap{ XZb=;tYo
o6px1C:
void init(int[] data){ @T~XwJ~
this.queue=new int[data.length+1]; dazNwn
for(int i=0;i queue[++size]=data; Tc/^h4xH
fixUp(size); u"=]cBRWL6
} j*<J&/luYZ
} <7VLUk}
xeSch?}
private int size=0; W|m(Jh[w]
\Q|-Npw
private int[] queue; AQUAQZc
BV B2$&eJ
public int get() { Q-'j131[
return queue[1]; J)>DsQ+Cj
} } +}nrJv
hm1s~@oEm
public void remove() { Jg;[k
SortUtil.swap(queue,1,size--); @01.Pd
fixDown(1); iHGVR
} A.vAk''(}+
file://fixdown |${4sUR
private void fixDown(int k) { 7.hBc;%2u
int j; bE/|&8
while ((j = k << 1) <= size) { 22ON=NN
if (j < size %26amp;%26amp; queue[j] j++; 7]vmtlL
if (queue[k]>queue[j]) file://不用交换 `!vqT 3p,
break; `FPQOa*%3
SortUtil.swap(queue,j,k); 94+^K=lAX
k = j; ;[}OZt
} s#s">hMrI
} %6320 x
private void fixUp(int k) { %NrH\v{7Q
while (k > 1) { Xe%J{
int j = k >> 1; (Lgea
if (queue[j]>queue[k]) v:P]o9Oj8
break; +d6onO{8
SortUtil.swap(queue,j,k); X\h.@+f=
k = j; |@X^_L.!
} -xHR6
} 7HDc]&z
HLW_Y|QaFo
} 'z. GAR
$Y|OGZH8E
} |reA`&<q
!FL"L 9
SortUtil： ;#85 _/
9r].rzf9
package org.rut.util.algorithm; R'k`0
>J7slDRo
import org.rut.util.algorithm.support.BubbleSort; FMVAXOO
import org.rut.util.algorithm.support.HeapSort; /yG34) aB
import org.rut.util.algorithm.support.ImprovedMergeSort; =HCEUB9Fs
import org.rut.util.algorithm.support.ImprovedQuickSort; Mp`$1Ksn
import org.rut.util.algorithm.support.InsertSort; ,p d-hu
import org.rut.util.algorithm.support.MergeSort; qSvV|G
import org.rut.util.algorithm.support.QuickSort; uvbVb"\"Yk
import org.rut.util.algorithm.support.SelectionSort; P\j\p =
import org.rut.util.algorithm.support.ShellSort; ?}KRAtJ8
.yj@hpJM
/** 4/b.;$
* @author treeroot B>fZH\Y
* @since 2006-2-2 y0d=
* @version 1.0 e'K~WNT
*/ <gF]9%2E
public class SortUtil { A9.TRKb=8
public final static int INSERT = 1; ^O_Z5NbC3
public final static int BUBBLE = 2; spV7\Gs.@
public final static int SELECTION = 3; msmW2Zc
public final static int SHELL = 4; 3=.YQE0!dx
public final static int QUICK = 5; ;bE/(nz M
public final static int IMPROVED_QUICK = 6; ZA(u"T~
public final static int MERGE = 7; L!cOg8Z
public final static int IMPROVED_MERGE = 8; +Uq|Yh'Q
public final static int HEAP = 9; qq5X3K2&
#d@wjQ0DW
public static void sort(int[] data) { [./FzlAs
sort(data, IMPROVED_QUICK); ?@ oF@AEx=
} KW .4 9
private static String[] name={ cqG6di7#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <+k&8^:bi
}; '0HOL)cIz
O-(V`BZe
private static Sort[] impl=new Sort[]{ 7_I83$p'
new InsertSort(), QOB^U-cW
new BubbleSort(), NIs7v
new SelectionSort(), Mh)?A/e
new ShellSort(), D~C'1C&W
new QuickSort(), OS z71;j
new ImprovedQuickSort(), cyCh^- <l@
new MergeSort(), uV5uZ
new ImprovedMergeSort(), <8:h%%$?
new HeapSort() <F7a!$zQ
}; \l59/ZFan
uN`/&_$c
public static String toString(int algorithm){ 8qyEHUN2q
return name[algorithm-1]; UMGiJO\yH
} 7zG r+Px
]*=4>(F[
public static void sort(int[] data, int algorithm) { gA2Wo+\^bq
impl[algorithm-1].sort(data); T`x|=}
} {srP3ll P
E#J})cPzw
public static interface Sort { f!'i5I]
public void sort(int[] data); UY(T>4H+h
} @"7S$@cO
9nG^_.}|
public static void swap(int[] data, int i, int j) { pkn^K+<n,
int temp = data; HA,o2jZ?In
data = data[j]; ~XOmxz0
data[j] = temp; v #+ECx
} tAv3+
} I\mF dE