[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; mOjl0n[To]
} ;NJM3g0I
int i1=l; t.O4-+$ig
int i2=mid+1; f'Xz4;
for(int cur=l;cur<=r;cur++){ yNx"Ey dk`
if(i1==mid+1) )>=|oY3
data[cur]=temp[i2++]; I#p-P)Q%S
else if(i2>r) 10/3-)+
data[cur]=temp[i1++]; 93`
else if(temp[i1] data[cur]=temp[i1++]; zgpPu4t
else IZ4jFgpR
data[cur]=temp[i2++]; uqy~hY
} \}qv}hU
} ,%m$_wA$
zwHTtE
} gwF@'Uu
q%^gG03.
改进后的归并排序: %}&9[#
r?2C%GI`
package org.rut.util.algorithm.support; sAc)X!}
g(;ejKSR
import org.rut.util.algorithm.SortUtil; z#*GPA8Em:
a. 5`Q2
/** tv|=`~Y
* @author treeroot [K9q+
* @since 2006-2-2 WCWBvw4&"{
* @version 1.0 \J\1i=a-=
*/ aH$*Ue@Q
public class ImprovedMergeSort implements SortUtil.Sort { ]g+(#x_.?
@fYA{-ZC
private static final int THRESHOLD = 10; %F/tbXy{
&k{@:z
/* #QDV_ziE5
* (non-Javadoc) Y2D)$
* {k]VT4/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ul@'z|
*/ K|1^?#n
public void sort(int[] data) { |$0/:*
int[] temp=new int[data.length]; E0h!%/+-L
mergeSort(data,temp,0,data.length-1); 9_/1TjrDN
} ]ogy`O>
6qA{l_V
private void mergeSort(int[] data, int[] temp, int l, int r) { q B2#EsZ
int i, j, k; =gqZ^v&5U
int mid = (l + r) / 2; &boBu^,94
if (l == r) gR>#LM&dG
return; Qqaf\$X
if ((mid - l) >= THRESHOLD) J)[(4R>
mergeSort(data, temp, l, mid); )T+htD)
else tw')2UGg
insertSort(data, l, mid - l + 1); DpR%s",Q
if ((r - mid) > THRESHOLD) Q&\k"X1
mergeSort(data, temp, mid + 1, r); ,J#5Y.
else 8+W^t I
insertSort(data, mid + 1, r - mid); ZqGq%8\.s
1f:k:Y9i
for (i = l; i <= mid; i++) { A,/S/_Q=
temp = data; Aws TDM
} X[[=YCi0
for (j = 1; j <= r - mid; j++) { *]=)mM#
temp[r - j + 1] = data[j + mid]; :4Vt
} j?(QieBH
int a = temp[l]; ]7O?c=
int b = temp[r]; "8X+F%
for (i = l, j = r, k = l; k <= r; k++) { 1$W!<:uh
if (a < b) { PrcM'Q
data[k] = temp[i++]; _Owz%
a = temp; >JMKEHl.q
} else { EKf4f^<
data[k] = temp[j--]; Lsz`nD5
b = temp[j]; ( FRf.mv{
} kShniN
} Kna'5L5"
} ;sf/tX
\4[Ta,;t
/** (!(bysi9
* @param data L5W>in5(
* @param l [`lAc V<
* @param i GwULtRa/
*/ >vU Hf`4T
private void insertSort(int[] data, int start, int len) { \v_C7R;&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "gz;Q
} ^q`*!B9@
} \zUsHK?L"t
} v=>Gvl3&U
} s$_#T
a6d KQ3D
堆排序： luT8>9X^:a
I .ty-X]
package org.rut.util.algorithm.support; 2'U9!.o
M)7enp) F.
import org.rut.util.algorithm.SortUtil; ~}*;Ko\
as4NvZ@+r
/** `^kST><
* @author treeroot 4;||g@f'[
* @since 2006-2-2 rzHa&:Y
* @version 1.0 M6sDtL9l
*/ `9l\~t(M
public class HeapSort implements SortUtil.Sort{ >``GDjcJ
0 y%R
/* (non-Javadoc) `%3p.~>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6]S.1BP
*/ d ] ;pG(
public void sort(int[] data) { X;:xGZ-oY
MaxHeap h=new MaxHeap(); F948%?a
h.init(data); ]o$/xP
for(int i=0;i h.remove(); FF/R_xnx
System.arraycopy(h.queue,1,data,0,data.length); Gu).*cU
} 8A.7=C' z
8)8oR&(f
private static class MaxHeap{ 6,1|y%(f
ud D[hPJd
void init(int[] data){ ]s@8I2_
this.queue=new int[data.length+1]; ?y)X$D^
for(int i=0;i queue[++size]=data; KCE-6T
fixUp(size); V?BVk8D};
} 1,'^BgI,
} 9AzGk=^
+=Wdn)T
private int size=0; D:tZiS=0
q&T'x> /
private int[] queue; T(^8ki
t}*!UixE
public int get() { a|uZJ*
return queue[1]; bU`yymf{L
} P'9io!Z-s
^\jX5)2{
public void remove() { PSS/JFZ^
SortUtil.swap(queue,1,size--); I>Fh*2
fixDown(1); Fjt,
} 3>)BI(Wl
file://fixdown G!%XQ\a!
private void fixDown(int k) { 9mphj)`d;#
int j; }p?V5Qp
while ((j = k << 1) <= size) { | V,jd
if (j < size %26amp;%26amp; queue[j] j++; $ywh%OEH
if (queue[k]>queue[j]) file://不用交换 9= $,]M
break; t`t:qko
SortUtil.swap(queue,j,k); [Vp2!"
k = j; @]wem
} +{!t~BW
} <JM%Kn )
private void fixUp(int k) { <D;Q8
while (k > 1) { 0P3|1=
int j = k >> 1; 4Olv8nOe<
if (queue[j]>queue[k]) PFgjWp"Y
break; !nBm}E7d
SortUtil.swap(queue,j,k); yPG\ &Bo
k = j; } %CbZ/7&
} yi-"hT`
} @<TZH
x][9ptrh
} |SukiXJZF
<ZC^H
} {^5<{j3e
(i0"hi
SortUtil： &\lS
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package org.rut.util.algorithm; )LrCoI =|
SOQ-D4q
import org.rut.util.algorithm.support.BubbleSort; 1S]gD&V
import org.rut.util.algorithm.support.HeapSort; n.6 0$kR`
import org.rut.util.algorithm.support.ImprovedMergeSort; K-k.=6mS
import org.rut.util.algorithm.support.ImprovedQuickSort; )P9{47
import org.rut.util.algorithm.support.InsertSort; Dw/Gha/
import org.rut.util.algorithm.support.MergeSort; LO}:Ub
import org.rut.util.algorithm.support.QuickSort; +IO1ipc4cE
import org.rut.util.algorithm.support.SelectionSort; *5_8\7d
import org.rut.util.algorithm.support.ShellSort; m/c&/6nk
(6#yw`\
/** X)iWb(@k"7
* @author treeroot lPcVhj6No%
* @since 2006-2-2 $aPHl
* @version 1.0 ctUF/[_w;
*/ &G@-yQ
public class SortUtil { ZDkD%SCy
public final static int INSERT = 1; MLD>"W
public final static int BUBBLE = 2; m`\i+
public final static int SELECTION = 3; e(;`9T
public final static int SHELL = 4; ['4\O43yv
public final static int QUICK = 5; uJ/?+5TU
public final static int IMPROVED_QUICK = 6; JfP\7
public final static int MERGE = 7; _`X#c-J
public final static int IMPROVED_MERGE = 8; @U /3iDB\
public final static int HEAP = 9; e=n{f*KG`
tC@zM.v%
public static void sort(int[] data) { T:g4D z*2\
sort(data, IMPROVED_QUICK); |N=@E,33
} ,7fc41O3V
private static String[] name={ F@K*T2uh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !G"9xrr1
}; aa0`y
7tfivIj)e
private static Sort[] impl=new Sort[]{ |1QbO`f/F
new InsertSort(), 6mF{ImbRbS
new BubbleSort(), 4`UL1)A]
new SelectionSort(), fr'huvc
new ShellSort(), ^0s\/qyqm
new QuickSort(), <h@z=ijN
new ImprovedQuickSort(), RFn0P)9&
new MergeSort(), )p!*c,
new ImprovedMergeSort(), JwI`"$>w
new HeapSort() te\h?H
}; y3KcM#[
"Ql}Y1
public static String toString(int algorithm){ =,AC%S_D~
return name[algorithm-1]; $p0 /6c
} X@yr$3vC
:zj9%4A
public static void sort(int[] data, int algorithm) { R*Xu(89
impl[algorithm-1].sort(data); 2GiUPtO&Gj
} PHRGhKJW})
iBKb/Oi6
public static interface Sort { 4{*tn"y
public void sort(int[] data); @QVqpE<|
} 7ZV~op2Q
a)_rka1(
public static void swap(int[] data, int i, int j) { e'~-`Z9-)
int temp = data; `sk!C7%
data = data[j]; %_b^!FR
data[j] = temp; ':!3jZP"m
} <DeKs?v
} c?!YFm