[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; %VH{bpS|i:
} ?zpN09e
int i1=l; 6lAHB*`
int i2=mid+1; 'G)UIjl
for(int cur=l;cur<=r;cur++){ QJ4=*tX)
if(i1==mid+1) ztEM>xsk
data[cur]=temp[i2++]; _8 C:Md`
else if(i2>r) {,X}Btnwp
data[cur]=temp[i1++]; F[@M?
else if(temp[i1] data[cur]=temp[i1++]; )lhPl
else #@UzOQ>
data[cur]=temp[i2++]; aam6R/4
} S"<"e\\}"_
} fW3awR{
~bD'QMk
} ?mi1PNps#
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改进后的归并排序: xg.o7-^M
eAl;:0=%L
package org.rut.util.algorithm.support; rYI7V?
K@<%Vc>L(
import org.rut.util.algorithm.SortUtil; 3;%dn\ D
360b`zS
/** ."u DM<
* @author treeroot ^'G,sZ6'Nh
* @since 2006-2-2 Vi*HG &DD
* @version 1.0 (3VV(18
*/ =O o4O CF2
public class ImprovedMergeSort implements SortUtil.Sort { 7[I%UP
'$0~PH&
private static final int THRESHOLD = 10; w D}g\{P
/idrbc
/* *Dhy a g
* (non-Javadoc) o+0x1Ct3P
* (#Ku`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $8{v_2C){
*/ ^q}cy1"j"
public void sort(int[] data) { zgn~UC6&
int[] temp=new int[data.length]; 9Hm>@dBhM
mergeSort(data,temp,0,data.length-1); wa%;'M&
} AuIg=-xR
TbQ5
private void mergeSort(int[] data, int[] temp, int l, int r) { Y;"rJxHD
int i, j, k; @b3jO
int mid = (l + r) / 2; cii! WCu
if (l == r) 5fvY#6;
return; iXPe
if ((mid - l) >= THRESHOLD) 0`Hr(J`F
mergeSort(data, temp, l, mid); T$IwrTF@?
else p:Hg>Z
insertSort(data, l, mid - l + 1); 9#MY(Hr
if ((r - mid) > THRESHOLD) -d)+G%{
mergeSort(data, temp, mid + 1, r); p0sq{d~
else }UzRFIcv
insertSort(data, mid + 1, r - mid); w!--K9
:406Oa
for (i = l; i <= mid; i++) { SCL8.%z D
temp = data; /v-:ca)7mI
} IBm"VCg{Ew
for (j = 1; j <= r - mid; j++) { = P@j*ix
temp[r - j + 1] = data[j + mid]; 6F:<c
} ] ^s,
int a = temp[l]; :cA%lKg
int b = temp[r]; ,SG-{
for (i = l, j = r, k = l; k <= r; k++) { ,a'Y^[4k?
if (a < b) { J^gElp
data[k] = temp[i++]; v[XTH 2
a = temp; "n%0L4J
} else { [BZA1,
data[k] = temp[j--]; 8nE}RD7bx
b = temp[j]; Vk:] aveW
} zEy,aa:M
} FMEW['
} ?2nF1>1
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/** 'Da*MGu9
* @param data 2>*b.$g
* @param l []l2 `fS#
* @param i ;"w?@ELE
*/ b]6@ O8
private void insertSort(int[] data, int start, int len) { @Yj+u2!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b <z)4
} W,fXHYst
} I%M"I0FV
} #p7K2
} T)o>U&KNP
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堆排序： 1LVO0lT
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package org.rut.util.algorithm.support; vf;&0j&`
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import org.rut.util.algorithm.SortUtil; d#1yVdqRl
Sp/<%+2(
/** 4Kh0evZ
* @author treeroot -gB9476-
* @since 2006-2-2 CmxQb,Uls
* @version 1.0 3eERY[
*/ tA8O(9OV
public class HeapSort implements SortUtil.Sort{ *2>kic aH
'h87A-\!F
/* (non-Javadoc) 3=-V!E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B'&QLO|
*/ -?p4"[
public void sort(int[] data) { b?K`DUju{0
MaxHeap h=new MaxHeap(); W<u,S
h.init(data); t.Yf8Gy
for(int i=0;i h.remove(); )F_nK f"a
System.arraycopy(h.queue,1,data,0,data.length); _=_<cgy1u
} u*$]Bx
ipC <p?PpR
private static class MaxHeap{ Qs,4PPEg
W1_.wN$,5
void init(int[] data){ 0Py*%}r1
this.queue=new int[data.length+1]; "8R &c}
for(int i=0;i queue[++size]=data; bObsj]
fixUp(size); 9s1^hW2%Q
} 7Ie=(x8):
} ac\([F-
hI9q);g
private int size=0; ^qzH(~g{M
3YJ"[$w='(
private int[] queue; .)SR3?
}V[ORGzox
public int get() { f!{@{\
return queue[1]; QIg'js$W
} S@g(kIo]
91]sO%3
public void remove() { YN+vk}8 <
SortUtil.swap(queue,1,size--); wSw> UU
fixDown(1); 2WTOu x*
} }8POm#
file://fixdown $rlrR'[H
private void fixDown(int k) { $ nHD,h
int j; TkJ[N4'0
while ((j = k << 1) <= size) { .`Q^8|$-K
if (j < size %26amp;%26amp; queue[j] j++; 6]4#8tR1_
if (queue[k]>queue[j]) file://不用交换 v+I-*,R
break; !LzA
SortUtil.swap(queue,j,k); V$sY3,J7A%
k = j; ~USt&?
} ![sXR
} dI&Q5M8
private void fixUp(int k) { OZ+v ~'oD
while (k > 1) { AYgXqmH~+
int j = k >> 1; b>Y{,`E3
if (queue[j]>queue[k]) B6Eu."T
break; tAF?.\x"g
SortUtil.swap(queue,j,k); Z&Ciy n
k = j; ! 5NuFLOf
} =E5bM_P<K
} i'7+ ?YL
#{vC =m73
} fT|A^
xC,x_:R`
} i=cST8!8N
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SortUtil： REU,"
sVK?sBs]
package org.rut.util.algorithm; qD4]7"9
Jsysk $R
import org.rut.util.algorithm.support.BubbleSort; lI 4tW=
import org.rut.util.algorithm.support.HeapSort; ;~EQS.Qp
import org.rut.util.algorithm.support.ImprovedMergeSort; PDuc;RG
import org.rut.util.algorithm.support.ImprovedQuickSort; )63 $,y-;$
import org.rut.util.algorithm.support.InsertSort; O=A2QykV(
import org.rut.util.algorithm.support.MergeSort; H*'1bLzq
import org.rut.util.algorithm.support.QuickSort; }=5>h' <
import org.rut.util.algorithm.support.SelectionSort; RqtBz3v
import org.rut.util.algorithm.support.ShellSort; njF$1? )sq
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/** du66a+@t
* @author treeroot _cX}!d!j
* @since 2006-2-2 qcS.=Cj?)
* @version 1.0 kFv*>>X`
*/ <qwf"Ey
public class SortUtil { e@Lxduq
public final static int INSERT = 1; 5e/YEDP
public final static int BUBBLE = 2; @PEFl"
public final static int SELECTION = 3; sD:o 2(G*
public final static int SHELL = 4; nt#9j',6Rn
public final static int QUICK = 5; ^_;'9YD
public final static int IMPROVED_QUICK = 6; j#1G?MF
public final static int MERGE = 7; Yv5H41o"
public final static int IMPROVED_MERGE = 8; X.eOw>.
public final static int HEAP = 9; rm8Ys61\=
> S>*JP
public static void sort(int[] data) { R}ki%i5|
sort(data, IMPROVED_QUICK); v;x0=I&%
} 5#,H&ui\
private static String[] name={ \8`7E1d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <+_XGOt0<
}; /MGapmqV9
\c< oVF'
private static Sort[] impl=new Sort[]{ \Ii{sn9
new InsertSort(), hOY@vm&
new BubbleSort(), }a7d(7
new SelectionSort(), gV2vwe
new ShellSort(), m,k0 h%
new QuickSort(), ?woL17Gt
new ImprovedQuickSort(), H9mNnZ_k
new MergeSort(), L ;L:
new ImprovedMergeSort(), u>*a@3$f
new HeapSort() sbW+vc
}; q)?%END
aZN?V}^+
public static String toString(int algorithm){ @dWA1tM
return name[algorithm-1]; >jW**F
} g\q .
|+Y-i4t
public static void sort(int[] data, int algorithm) { 6}^x#9\
impl[algorithm-1].sort(data); /5NWV#-
} UPhO=G
$*C }iJsF
public static interface Sort { ?"yjgt7+y
public void sort(int[] data); ^E70$yB^
} Y~UuT8-c
!db=Iz5)
public static void swap(int[] data, int i, int j) { qs]W2{-4~
int temp = data; Ne u$SP
data = data[j]; +6WjOcu
data[j] = temp; y" =?l
} =[n !3M+X
} awzlLI<2p