[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; 4L-:*b_v\
} L-pVltX
int i1=l; xvzr:pP
int i2=mid+1; 2oa#0`{
for(int cur=l;cur<=r;cur++){ %8*64T")
if(i1==mid+1) {GvTfZfp
data[cur]=temp[i2++]; >@WX>0`ht
else if(i2>r) X1IeSMAe
data[cur]=temp[i1++]; Eh-n
else if(temp[i1] data[cur]=temp[i1++]; tt%MoQ)
else A*./,KT
data[cur]=temp[i2++]; _,;j7%j
} 5Zmw} M
} oLWJm
i{!T&8
} cJM:
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改进后的归并排序: -~eJn'W
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package org.rut.util.algorithm.support; f:g,_|JD$
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import org.rut.util.algorithm.SortUtil; ;})5:\h
bifS 2>c
/** ]M)O YY
* @author treeroot ZpUCfS)|&
* @since 2006-2-2 j8|g!>Nv
* @version 1.0 =fm]Dl9h*
*/ hYQ_45Z*?
public class ImprovedMergeSort implements SortUtil.Sort { *A}cL
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private static final int THRESHOLD = 10; st"{M\.p
mzQ`N}]T:
/* b}T6v
* (non-Javadoc) 8 #ndFpu
* LPG`^SA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %{3 aW>yx
*/ UgWs{y2SE.
public void sort(int[] data) { nR4y`oP+
int[] temp=new int[data.length]; :{NC-%4o0
mergeSort(data,temp,0,data.length-1); <Sz52Suh>
} h' !imQ
)>D+x5o]
private void mergeSort(int[] data, int[] temp, int l, int r) { R*|LI
int i, j, k; Z~A@o""F
int mid = (l + r) / 2; {bO|409>W
if (l == r) `@i5i((
return; Z%GTnG|rG
if ((mid - l) >= THRESHOLD) -XRn~=5
mergeSort(data, temp, l, mid); 3nY1[,
else }HE6aF62O
insertSort(data, l, mid - l + 1); sC[yI Up
if ((r - mid) > THRESHOLD) JFgoN,xn
mergeSort(data, temp, mid + 1, r); Bl9jkq ]
else tBTTCwNT%
insertSort(data, mid + 1, r - mid); 2_Wg!bq
64-#}3zL
for (i = l; i <= mid; i++) { xEuN
temp = data; T#pk]c6Q
} `%3/
for (j = 1; j <= r - mid; j++) { 1 T130L
temp[r - j + 1] = data[j + mid]; 0Z|FZGRP
} pZ#ap<|>I
int a = temp[l]; X(jVRr_m9
int b = temp[r]; /ywD{*
for (i = l, j = r, k = l; k <= r; k++) { DmXcPJ[9
if (a < b) { R),zl_d_
data[k] = temp[i++]; .1 %T W)
a = temp; 47r_y\U h
} else { g%u&Zkevx
data[k] = temp[j--]; 56l@a{
b = temp[j]; "P)*FT
} 2oJb)CB
} h7s;m
} [ofqGwpDG
nW"q
/** y*{Zbz#{
* @param data Rl|4S[
* @param l [i0Hm)Bd3
* @param i k%y9aO
*/ fQLt=Lrp
private void insertSort(int[] data, int start, int len) { ,@m@S^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q-#$Aa
} kY]W Qu
} CE15pNss
} +i\&6HGK;-
} Sx
#d{=\$=
堆排序： Kb =@ =Xta
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package org.rut.util.algorithm.support; ^IKO2Ft
`IYuz:
import org.rut.util.algorithm.SortUtil; p0.|<
M4ozTp<$O
/** ~)?
* @author treeroot fjnTe
* @since 2006-2-2 `[zQf
* @version 1.0 XPB9~::
*/ :|o<SZ
public class HeapSort implements SortUtil.Sort{ kP xa7
#k3t3az2{
/* (non-Javadoc) 1Y_w5dU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "^I mb,
*/ Nr2C@FU:0
public void sort(int[] data) { t>B^q3\q?
MaxHeap h=new MaxHeap(); zo;^m|
h.init(data); J8y0d1SG
for(int i=0;i h.remove(); \,!QJp4
System.arraycopy(h.queue,1,data,0,data.length); \.XLcz
} 2cu#lMq
HE<1v@jW
private static class MaxHeap{ ,:+dg(\r
+.RKi!
void init(int[] data){ ]4+s$rG
this.queue=new int[data.length+1]; PL{Q!QJK'
for(int i=0;i queue[++size]=data; BQ^H? jo
fixUp(size); JO14KY*%
} W&h[p_0
} 0iCPi)B
yBLK$@9
private int size=0; 7=@jARW&
tU"raP^=
private int[] queue; bbxLBD'
.I3?7
public int get() { bYe;b><G
return queue[1]; Oo?,fw
} 4E44Hzs
D .vw8H3
public void remove() { jQU"Ved
SortUtil.swap(queue,1,size--); K!D o8|
fixDown(1); yV)m"j
} K; FW
file://fixdown <lr*ZSNY
private void fixDown(int k) { jClj_E
int j; 7\o!HMfK
while ((j = k << 1) <= size) { H1!iP$1#V
if (j < size %26amp;%26amp; queue[j] j++; SM[Bv9|0
if (queue[k]>queue[j]) file://不用交换 j?b\+rr
break; R`F,aIJ]
SortUtil.swap(queue,j,k); pIWI
k = j; Es5
} KCe13!
} |L_wX:d`9
private void fixUp(int k) { uGdp@]z&8Q
while (k > 1) { doHF|<s
int j = k >> 1; 5>9Y|UU
if (queue[j]>queue[k]) >Ps7I
break; t+CWeCp,
SortUtil.swap(queue,j,k); T5wjU*=IL
k = j; EoX_KG{
} dQy>Nmfy
} wx=0'T-[
=1dI>M>tm
} ^s\3/z>b4!
qdCWy
} 9Qj2W
{#IPf0O
SortUtil： CeT~p6=
mq/zTm
package org.rut.util.algorithm; "S~_[/q
(_* wt]"'
import org.rut.util.algorithm.support.BubbleSort; A`O<6
import org.rut.util.algorithm.support.HeapSort; *cWmS\h|
import org.rut.util.algorithm.support.ImprovedMergeSort; `Lyq[zg8
import org.rut.util.algorithm.support.ImprovedQuickSort; KsAH]2Q%
import org.rut.util.algorithm.support.InsertSort; F=G{)*Ih
import org.rut.util.algorithm.support.MergeSort; Kr L>FI
import org.rut.util.algorithm.support.QuickSort; x4Rk<Th"o
import org.rut.util.algorithm.support.SelectionSort; \(I6_a_{
import org.rut.util.algorithm.support.ShellSort; ,]R8(bD)
HOt>}x
/** '#\D]5
* @author treeroot $#o1MX
* @since 2006-2-2 mxrG)n6Y
* @version 1.0 vUQFQ
*/ 7J>Gd
public class SortUtil { (7lBID4
public final static int INSERT = 1; l#3($QV,
public final static int BUBBLE = 2; oN[Th
public final static int SELECTION = 3; >=ot8%.!,B
public final static int SHELL = 4; 2k7bK6=nm
public final static int QUICK = 5; ~7quTp)
public final static int IMPROVED_QUICK = 6; Vu0KtG9
public final static int MERGE = 7; B~r}c4R{7
public final static int IMPROVED_MERGE = 8; ]^"k8v/
public final static int HEAP = 9; x:K?\<
>L((2wfiN
public static void sort(int[] data) { @-.? B
sort(data, IMPROVED_QUICK); Z\X'd_1!
} qZ2&Xw.{1
private static String[] name={ Bt^K]F\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~>ME'D~
}; %@&a7JOL
OQ_stE2i
private static Sort[] impl=new Sort[]{ +2cs#i
new InsertSort(), bggusK<
new BubbleSort(), WoL9V"]
new SelectionSort(), B_3QQtjAl
new ShellSort(), exR^/|BR
new QuickSort(), |oKu=/[K
new ImprovedQuickSort(), !7lj>BA>
new MergeSort(), WbjF]b\
new ImprovedMergeSort(), #/J 'P[z
new HeapSort() upn8n vy4(
}; {sN"(H4$
lpQP"%q
public static String toString(int algorithm){ TZ^LA L'8_
return name[algorithm-1]; aP~gaSx
} ph30'"[Z}
6=|&tE
public static void sort(int[] data, int algorithm) { 6DS43AQs
impl[algorithm-1].sort(data); (4~WWU (iT
} K6\` __mLf
34C``i
public static interface Sort { u7]<=*V]
public void sort(int[] data); _45cH{$sA
} O@U?IF$
(;o*eFC F
public static void swap(int[] data, int i, int j) { irxz l3
int temp = data; mE$dO3
data = data[j]; }#9(Mul
data[j] = temp; Unl?fXI
} ='Oj4T
} pV`$7^#X