[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; Hf'yRKACj
} tyLR_@i%%
int i1=l; fii\&p7z
int i2=mid+1; %Jpb&CEY
for(int cur=l;cur<=r;cur++){ /j1p^=ARV
if(i1==mid+1) ymsqJ
data[cur]=temp[i2++]; y=jTS
else if(i2>r) oEWx9c{~$
data[cur]=temp[i1++]; {:3XP<hqN
else if(temp[i1] data[cur]=temp[i1++]; o\luE{H .?
else G"BoD5m
data[cur]=temp[i2++]; "p\XaClpz
} M]>JI'8
} 79^on8k}
sKX%<n$
} |7CH
TLL.Ch|#Y
改进后的归并排序: n]B)\D+V^
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package org.rut.util.algorithm.support; L?^C\g6u]
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import org.rut.util.algorithm.SortUtil; o4kNDXP#S
?nFT51t/4
/** FVsNOU
* @author treeroot Kg@9kJB
* @since 2006-2-2 2="C6 7TK
* @version 1.0 r,6~?hG]
*/ UY**3MK
public class ImprovedMergeSort implements SortUtil.Sort { !qH=l-7A
U6=m4]~Z
private static final int THRESHOLD = 10; WII_s|YSt%
kmW!0hm;e
/* ?<w +{
* (non-Javadoc) GX_Lxc_<f
* LFSOHJj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nWZrB s _
*/ :;"3k64
public void sort(int[] data) { &V( LeSI
int[] temp=new int[data.length]; CSU>nIE0
mergeSort(data,temp,0,data.length-1); 2$NP46z}
} bi^LpyEn
)KRO=~Y
private void mergeSort(int[] data, int[] temp, int l, int r) { 7*XG]=z/
int i, j, k; 3F}d,aB A
int mid = (l + r) / 2; F{T|lTl
if (l == r) 9/s-|jD
return; *8XGo
if ((mid - l) >= THRESHOLD) Y,mH ]
mergeSort(data, temp, l, mid); sCb?TyN'n
else I)B2Z(<Q
insertSort(data, l, mid - l + 1); m Xw1%w[*
if ((r - mid) > THRESHOLD) !9)*.9[8
mergeSort(data, temp, mid + 1, r); n? s4"N6
else {8jG6
insertSort(data, mid + 1, r - mid); Q|G[9HBI
'`o+#\,b^%
for (i = l; i <= mid; i++) { m@c2'*&Y
temp = data; w-nkf M~
} ^ O`
for (j = 1; j <= r - mid; j++) { nMc-kyl{
temp[r - j + 1] = data[j + mid]; 9J]LV'f7
} G>_ZUHdI
int a = temp[l]; &P{%C5?{
int b = temp[r]; nj9hRiLn
for (i = l, j = r, k = l; k <= r; k++) { {{DW P-v4
if (a < b) { oW+R:2I~O
data[k] = temp[i++]; FySK&
a = temp; 98O z
} else { U3U eTa_
data[k] = temp[j--]; Bv=Z*"Fv
b = temp[j]; rfPJBD{Ve
} *pWswcV/
} <g%xo"
} ;%82Z4
d7G'+B1
/** 3S5QqAm
* @param data W4YC5ZH{l
* @param l Sdt @"6
* @param i xjX5PQu
*/ nEn2!)$
private void insertSort(int[] data, int start, int len) { 9SFiL#1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ):[[Ch_
} dvj`%?=
} _88~uYG
} @LmUCP~
} =Tj0dfO|"
QDDSJ>l5_T
堆排序： {l1;&y?
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package org.rut.util.algorithm.support; C'$U1%: j
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import org.rut.util.algorithm.SortUtil; N,1wfOE
{oZ]1Qf_
/** oy |@m|J
* @author treeroot 1GNAx\(
* @since 2006-2-2 SVHtv0Nx
* @version 1.0 a&<<X:$Hy
*/ #*`|}_6L
public class HeapSort implements SortUtil.Sort{ 8_LDS
:H87x?e[
/* (non-Javadoc) :=8vy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RU'J!-w{
*/ HvngjP{>
public void sort(int[] data) { I[|I\tW
MaxHeap h=new MaxHeap(); ["7}u^z@<+
h.init(data); <*\J 6:^n
for(int i=0;i h.remove(); _\<M58/z
System.arraycopy(h.queue,1,data,0,data.length); aG ,uF
} &V;a:
.6hH}BM
private static class MaxHeap{ 8BN'fWl&E
*Zvw&y*
void init(int[] data){ _Dv^~e1c
this.queue=new int[data.length+1]; t&oNJq{
for(int i=0;i queue[++size]=data; r3-3*_
fixUp(size); i>~?XVU
} D'&LwU,o
} :z:Blp>nK/
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private int size=0; 4>W`XH
K$Ph$P@
private int[] queue; ~,:f,FkSQ
I5~DC
public int get() { o?3R HP47
return queue[1]; ^/+sl-6/F
} g[$B90
x<l1s
public void remove() { }B5I#Af7
SortUtil.swap(queue,1,size--); )0Lq>6j9
fixDown(1); 2Ar<(v$
} zaZnL7ZJX
file://fixdown RD4)NN6y5}
private void fixDown(int k) { :U9R 1^}A
int j; u%pief
while ((j = k << 1) <= size) { 8%4`Yj=
if (j < size %26amp;%26amp; queue[j] j++; EI;\of2,
if (queue[k]>queue[j]) file://不用交换 t'J fiGM
break; (pmo[2kg
SortUtil.swap(queue,j,k); q2Kn3{
k = j; jz)H?UuDY
} |h7v}Y
} H07j&
private void fixUp(int k) { |}`5<a!6U
while (k > 1) { (TE2t7ab|M
int j = k >> 1; E;qwoTmul
if (queue[j]>queue[k]) 1bBK1Uw
break; JvDsr0]\#
SortUtil.swap(queue,j,k); WdT|xf.Q&
k = j; cC4T3]4l'
} c;^J!e
} ^Toi_
R+K[/AA
} cabN<a l
^6+x0[13
} #jX>FXo
@I&"P:E0F;
SortUtil： =Wf@'~K0k"
%gaKnT(|r
package org.rut.util.algorithm; QP#Wfk(C
#-;BU{3*
import org.rut.util.algorithm.support.BubbleSort; G DV-wPX
import org.rut.util.algorithm.support.HeapSort; L9T u>4
import org.rut.util.algorithm.support.ImprovedMergeSort; :m d3@r']
import org.rut.util.algorithm.support.ImprovedQuickSort; Pio^5jhB6
import org.rut.util.algorithm.support.InsertSort; )hug<D *h
import org.rut.util.algorithm.support.MergeSort; #*!$!c{
import org.rut.util.algorithm.support.QuickSort; OLrD4 e
import org.rut.util.algorithm.support.SelectionSort; 9zJ`;1
import org.rut.util.algorithm.support.ShellSort; %\l,X{X
L3AwL)I
/** q}5A^QX
* @author treeroot R*X2Z{n
* @since 2006-2-2 mw[4<vfB0a
* @version 1.0 +a/o)C{
*/ W(aRO
public class SortUtil { -e~Uu
public final static int INSERT = 1; 9^u?v`!
public final static int BUBBLE = 2; qN@a<row&~
public final static int SELECTION = 3; !)O$Q}'\
public final static int SHELL = 4; >|?T|
public final static int QUICK = 5; [R4x[36Zp
public final static int IMPROVED_QUICK = 6; Wv"tAseu
public final static int MERGE = 7; 2?QJh2
public final static int IMPROVED_MERGE = 8; Q$1K{14I
public final static int HEAP = 9; PAHlj,n)
0Mg8{
public static void sort(int[] data) { F:S,{&jB
sort(data, IMPROVED_QUICK); W[Bu&?h$
} 7g)3\C
private static String[] name={ ?N*0S'dY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QCR-lxO1
}; +,Az\aT/%
(GG"'bYk
private static Sort[] impl=new Sort[]{ %z~U@Mka
new InsertSort(), ^d80\PXz
new BubbleSort(), :eW~nI.Vc
new SelectionSort(), P0xLx
new ShellSort(), /BM1AV{s6
new QuickSort(), cA? x(
new ImprovedQuickSort(), 9Yyg}l:
new MergeSort(), Nb~dw;t
new ImprovedMergeSort(), zXZ'nJ5OGG
new HeapSort() [+g@@\X4
}; <(4#4=ivP
,SF.@^o@a
public static String toString(int algorithm){ Eap/7U1Q
return name[algorithm-1]; y.p6%E_`
} fm%RNAPvc
7Zt\G-QV
public static void sort(int[] data, int algorithm) { gvNZrp>e!
impl[algorithm-1].sort(data); -j_I_
} R*Z]
|xZcT4
public static interface Sort { mE`qvavP|/
public void sort(int[] data); >&QH{!(
} {X<4wxeTo
xn@0pL3B~
public static void swap(int[] data, int i, int j) { *ldMr{s<R
int temp = data; U5!f++
data = data[j]; W@,p9=425
data[j] = temp; KC:4
} Reu{
} *Ca)RgM