[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; X52jqXjg
} 4lKbw4[a
int i1=l; J5_ qqD)
int i2=mid+1; &CP@] pi9L
for(int cur=l;cur<=r;cur++){ %TggNU,
if(i1==mid+1) es(LE/`e
data[cur]=temp[i2++]; n^(yW
else if(i2>r) gm8Tm$fY
data[cur]=temp[i1++]; ).`a-Pv
else if(temp[i1] data[cur]=temp[i1++]; RxeRO2
else )A+j
data[cur]=temp[i2++]; *9:6t6x
} vi.AzO
} D]`B;aE>A*
O,,n
} OcS`Fxs
t>`LO
改进后的归并排序: |JQP7z6j]
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package org.rut.util.algorithm.support; w`!foPE
w 4gZ:fR=
import org.rut.util.algorithm.SortUtil; 5J#gJFA
\6 0WP-s
/** p$G3r0@
* @author treeroot s3RyLT
* @since 2006-2-2 xla^A}{
* @version 1.0 9}Ave:X^
*/ {3uSg)
public class ImprovedMergeSort implements SortUtil.Sort { "RX5] eJc\
iOXP\:mPo
private static final int THRESHOLD = 10; $u.T1v
|g^W @.P
/* s!!t
* (non-Javadoc) 9i[2z:4HJ
* fJlN'F7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MAo,PiYb
*/ &!~n=]*sz
public void sort(int[] data) { `.-k%2?/
int[] temp=new int[data.length]; m@2xC,@
mergeSort(data,temp,0,data.length-1); Bw7:ry
} Id 7
hGHzO
private void mergeSort(int[] data, int[] temp, int l, int r) { ~u&O
int i, j, k; m95$V&
int mid = (l + r) / 2; c,%>7U(w_
if (l == r) !!#ale&
return; f?^xh
if ((mid - l) >= THRESHOLD) Xz@;`>8i
mergeSort(data, temp, l, mid); tf79Gb>
else fw};.M
insertSort(data, l, mid - l + 1); *B}R4Y|g
if ((r - mid) > THRESHOLD) SF=|++b1f
mergeSort(data, temp, mid + 1, r); Y6DiISl
else E1v<-UPbA
insertSort(data, mid + 1, r - mid); =w?cp}HW
ur[bh
for (i = l; i <= mid; i++) { H)fo4N4ii
temp = data; )_.H #|r
} bUB6B
for (j = 1; j <= r - mid; j++) { rAdcMFW
temp[r - j + 1] = data[j + mid]; 7B2Og{P
} '^Np<
int a = temp[l]; a~EEow;A
int b = temp[r]; m Dq,,
for (i = l, j = r, k = l; k <= r; k++) { p6\9HG
if (a < b) { Ri0+nJ6
data[k] = temp[i++]; *4VP5]!
a = temp; rz7b%WY
} else { 1T?%i
data[k] = temp[j--]; Wfw9cxGkf
b = temp[j]; "G)? E|
} e(5R8ud
} FMr$cKvE]W
} P.J}\;S T
]F-6KeBc
/** 9'aR-tFun;
* @param data yiA\$mtO
* @param l En_8H[<%
* @param i Kg67cmj)f
*/ dju{&wo~4
private void insertSort(int[] data, int start, int len) { DcDGrRuh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gukq}ZQd
} %LW~oI.
} '(>N gd[
} ?`}U|]c
} ]qRz!D%@^
9:~^KQ{?
堆排序： o>%W7@Pr
qT%E[qDS
package org.rut.util.algorithm.support; >S/>2e:
Bqgw%_
import org.rut.util.algorithm.SortUtil; %.Y`X(g6/
O$^YUHD
/** YI+|6s[
* @author treeroot #2=30
* @since 2006-2-2 `-2`UGB-
* @version 1.0 A 76yz`D
*/ mL+ps x+
public class HeapSort implements SortUtil.Sort{ `8Ix&d3F
%hQ`b$07t
/* (non-Javadoc) Z)0R$j`2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -fn~y1
*/ @)wXP@7
public void sort(int[] data) { }c:0cl
MaxHeap h=new MaxHeap(); 8t; nU;E*
h.init(data); Jy$-)
for(int i=0;i h.remove(); 5=e@yIr'#
System.arraycopy(h.queue,1,data,0,data.length); c6.|; 4
} <C(2(3
=p:6u_@XWj
private static class MaxHeap{ Hu.d^@V
ar%Rr"
void init(int[] data){ o*VQH`G*|g
this.queue=new int[data.length+1]; 4Qs#ws])
for(int i=0;i queue[++size]=data; $dVjxo
fixUp(size); J)f?x T*
} 0't)fnI#
} <#i'3TUR
F"I@=R-n
private int size=0; sj2+|>
rv>6k:(
private int[] queue; W'yICt(#G
Fx2&ji6u
public int get() { |ESe=G
return queue[1]; IYPI5qCR
} 6zSN?0c
.v'8G)6g
public void remove() { wu3ZSLY
SortUtil.swap(queue,1,size--); >d|W>|8e
fixDown(1); 14O/R3+
} Rlu;l
file://fixdown T%F'4_~No
private void fixDown(int k) { i=rW{0c%
int j; E.brQx#}
while ((j = k << 1) <= size) { 0jq#,p=l;
if (j < size %26amp;%26amp; queue[j] j++; kQtl&{;k?
if (queue[k]>queue[j]) file://不用交换 F u)7J4Z
break; ) Lv{
SortUtil.swap(queue,j,k); 3@SfCG&|e
k = j; yuWrU<Kw
} ! >V1zk
} NaIVKo
private void fixUp(int k) { 3dfSu'
while (k > 1) { >"b"K{t
int j = k >> 1; O4{&B@!
if (queue[j]>queue[k]) O1PdM52
break; [ q}WS5Cp
SortUtil.swap(queue,j,k); 7O j9~3o4
k = j; z;)% i f6
} pw8'+FX
} a?dM8zAnc
LBzpaLd
} X^`ld&^*({
K7U<~f$OiN
} qW9|&GuZ$
6Z 7$ZQ~
SortUtil： n=~?BxB
l"64w>,
package org.rut.util.algorithm; (s~hh
snrfHDhUw
import org.rut.util.algorithm.support.BubbleSort; GZo^0U,;
import org.rut.util.algorithm.support.HeapSort; 49yN|h;c!
import org.rut.util.algorithm.support.ImprovedMergeSort; $J+$8pA
import org.rut.util.algorithm.support.ImprovedQuickSort; mDhU wZH
import org.rut.util.algorithm.support.InsertSort; :Wln$L$
import org.rut.util.algorithm.support.MergeSort; =KMck=#B
import org.rut.util.algorithm.support.QuickSort; .(krB%N
import org.rut.util.algorithm.support.SelectionSort; <qu\q \
import org.rut.util.algorithm.support.ShellSort; UqH7ec
G{<wXxq%
/** E[y?\{
* @author treeroot tpS F[W
* @since 2006-2-2 BFY~::<b
* @version 1.0 94+#6jd e
*/ ??4QDa-
public class SortUtil { 5M3QRJ!
public final static int INSERT = 1; 3N-(`[m{E
public final static int BUBBLE = 2; 6 J#C
public final static int SELECTION = 3; a^N/N5-Z
public final static int SHELL = 4; [Z1EjeX
public final static int QUICK = 5; QP'* )gjO7
public final static int IMPROVED_QUICK = 6; (NP=5lLH
public final static int MERGE = 7; W'[!4RQL
public final static int IMPROVED_MERGE = 8; CBc}N(9
public final static int HEAP = 9; 8w$cj'
4o_1F).\D
public static void sort(int[] data) { ~96"^%D
sort(data, IMPROVED_QUICK); ezL*YM8?@
} 5<61NnZ
private static String[] name={ _=rXaTp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,YH.n>`s+
}; {)G3*>sG3
>?5`FC
private static Sort[] impl=new Sort[]{ .Xr_BJ _
new InsertSort(), {\k9%2V*+
new BubbleSort(), Mc.KLz&,FC
new SelectionSort(), :geXplTx
new ShellSort(), u%2u%-w
new QuickSort(), T]+*}C
new ImprovedQuickSort(), 6;VlX,,j
new MergeSort(), YWTo]DJV
new ImprovedMergeSort(), m<j ^cU#J
new HeapSort() \.{?TB
}; zMDR1/|D
.UJk0%1
public static String toString(int algorithm){ "5@Y\L
return name[algorithm-1]; =w8*n2
} ,5q^/h
t ;[Me0
public static void sort(int[] data, int algorithm) { t.m $|M>
impl[algorithm-1].sort(data); ivt\| >
} Ih{~?(V$
2)G ZU
public static interface Sort { X;-,3dy
public void sort(int[] data); a].Bn#AH!C
} ]UMwpL&rY
;$Wa=wHb
public static void swap(int[] data, int i, int j) { #GTmC|[
int temp = data; r/PsFv{8
data = data[j]; 3#dUQ1qo6
data[j] = temp; 'oo]oeJ-
} Cu>pql<O
} k(Ow.nkb