[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; 6n-r
} @g\;` #l
int i1=l; kaO{#i2-
int i2=mid+1; yoW> BX
for(int cur=l;cur<=r;cur++){ 5)*6V&
if(i1==mid+1) 4:`[qE3
data[cur]=temp[i2++]; raHVkE{<
else if(i2>r) 7@~QkTH~y
data[cur]=temp[i1++]; f9F2U )
else if(temp[i1] data[cur]=temp[i1++]; m&cvU>lC
else I-{^[pp
data[cur]=temp[i2++]; nNs .,J)
} 4cB&Hk
} B_tQeM
kp; &cQu!
} pz @km
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改进后的归并排序: tQ[]Rc
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package org.rut.util.algorithm.support; [Q:f-<nH
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import org.rut.util.algorithm.SortUtil; hiIyaWU
:iEAUM
/** 9'X@@6b*'
* @author treeroot _XWnS9
* @since 2006-2-2 P4[]qbfd,
* @version 1.0 @it/$>R^)
*/ yU!GS-
public class ImprovedMergeSort implements SortUtil.Sort { {\Ys@FF
@E(P9zQ/zy
private static final int THRESHOLD = 10; +Y;8~+
_<2RYXBC
/* }Az'Zu4 =
* (non-Javadoc) Z+,CL/
* \*J.\f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g@(4ujOT
*/ 1=>2uYKR
public void sort(int[] data) { Qpw@MF2P
int[] temp=new int[data.length]; 22'vm~2E
mergeSort(data,temp,0,data.length-1); nqeVV&b!
} 6Wb!J>93
`/c@nxh
private void mergeSort(int[] data, int[] temp, int l, int r) { \H[Yyp4
int i, j, k; d QDLI
int mid = (l + r) / 2; qzHU)Ns(_
if (l == r) FSe5k5
return; L,W:,i/C
if ((mid - l) >= THRESHOLD) 7P c(<Ui+
mergeSort(data, temp, l, mid); {yU0D*#6
else cTy'JT7
insertSort(data, l, mid - l + 1); =G*z 53
if ((r - mid) > THRESHOLD) :i}@Br+R7L
mergeSort(data, temp, mid + 1, r); D=JlA~tS>
else k|5k8CRX
insertSort(data, mid + 1, r - mid); +8eVj#N
o Fi) d[`
for (i = l; i <= mid; i++) { iAgOnk[
temp = data; _E(x2BS?
} wE8]'o
for (j = 1; j <= r - mid; j++) { ~Q0&P!k
temp[r - j + 1] = data[j + mid]; eN4t1$
} -zR.'x%
int a = temp[l]; g kn)V~ij
int b = temp[r]; >-eS&rma
for (i = l, j = r, k = l; k <= r; k++) { SNN#$8\
if (a < b) { RB *P0
data[k] = temp[i++]; K9^"NS3
a = temp; &AJUY()8
} else { _V&x`ks
data[k] = temp[j--]; *cPN\Iu.W
b = temp[j]; yduuFK
} wZ O@J|
} yE<,Z%J[n
} oLd:3,p}
X= SG
/** 8M~u_`6
* @param data CxkMhd8qz
* @param l nqrDT1b**
* @param i T"IW Jpc
*/ 1B(G]o_>!
private void insertSort(int[] data, int start, int len) { Z|}H^0~7S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :|Upx4]Ec
} 4':MI|/my_
} hj+p`e S
} :Fc8S9
} -&$%|cyThQ
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堆排序： Y1|^>C#a
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package org.rut.util.algorithm.support; YT][\x
2G H)iUmc
import org.rut.util.algorithm.SortUtil; :)j7U3u
|K6nOX!i
/** qR_SQ VN
* @author treeroot &hO$4qtN
* @since 2006-2-2 T:Bzz)2/
* @version 1.0 KoFv0~8Q
*/ f^~2^p 1te
public class HeapSort implements SortUtil.Sort{ ":nI_~q
MV9r5|3-
/* (non-Javadoc) NWeV>;lh9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5%'o%`?i
*/ Nz}|%.GP"
public void sort(int[] data) { w{~" ;[@
MaxHeap h=new MaxHeap(); 1R*1BStc
h.init(data); QP'qG@j[:
for(int i=0;i h.remove(); 9OH.&g
System.arraycopy(h.queue,1,data,0,data.length); dWMccn;-m
} 3F;EE:
[1e.i
private static class MaxHeap{ $x/J+9Ww
3Sk5I%
void init(int[] data){ EkDws`@
this.queue=new int[data.length+1]; 9GtLMpy
for(int i=0;i queue[++size]=data; makaI0M
fixUp(size); U-ERhm>uk
} pz.Y=V\t
} 6V+V zDo
=P1RdyP
private int size=0; ?U=mcdqd
PKl]GegP
private int[] queue; i[mC3ghM6,
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public int get() { <##|311o
return queue[1]; fi5YMYd1
} C+DG+_%V*S
_xa}B,H
public void remove() { 2-QuT"Gkd
SortUtil.swap(queue,1,size--); Fka1]|j9
fixDown(1); k>7gy?Y!K<
} u}^a^B$
file://fixdown llHN2R%(
private void fixDown(int k) { S_a :ML<
int j; 8moUK3w
while ((j = k << 1) <= size) { ?0? x+
if (j < size %26amp;%26amp; queue[j] j++; L00Sp#$\
if (queue[k]>queue[j]) file://不用交换 2*N&q|ED
break; ys:1Z\$P
SortUtil.swap(queue,j,k); 4F}g(
k = j; -/@|2!d
} USlF+RY@3L
} t`N ">c"
private void fixUp(int k) { Q@PJ)fwN
while (k > 1) { #(m`2Z`H
int j = k >> 1; Z|V"8jE
if (queue[j]>queue[k]) ^vYVl{$bT
break; =1%zI%
SortUtil.swap(queue,j,k); Xw&QrTDS`
k = j; 45]Ym{]
} ;D%$Eh&oma
} %i;r]z-
e-L5=B
} \]tq7
U>e3_td3,
} UchALR^5
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SortUtil： R[mH35D/
<Tj"GVZAEO
package org.rut.util.algorithm; hNu>s
j1'xp`jgv
import org.rut.util.algorithm.support.BubbleSort; L8,H9T#e
import org.rut.util.algorithm.support.HeapSort; -o=P85V
import org.rut.util.algorithm.support.ImprovedMergeSort; -D.BJ(
import org.rut.util.algorithm.support.ImprovedQuickSort; [TiTff&LV
import org.rut.util.algorithm.support.InsertSort; SX1Fyy6 w
import org.rut.util.algorithm.support.MergeSort; M"$jpBN*
import org.rut.util.algorithm.support.QuickSort; ~:P8g<w
import org.rut.util.algorithm.support.SelectionSort; a"v"n$
import org.rut.util.algorithm.support.ShellSort; S0Rf>Eo4
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/** qd#(`%_/
* @author treeroot W<cW;mO
* @since 2006-2-2 D7gX,e
* @version 1.0 jm#F*F vL
*/ H3UX{|[
public class SortUtil { o2 T/IJP
public final static int INSERT = 1; 7Ap~7)z[
public final static int BUBBLE = 2; XNkQk0i;g&
public final static int SELECTION = 3; Cn6n4, 0
public final static int SHELL = 4; rw=UK`
public final static int QUICK = 5; 6N)< o ;U
public final static int IMPROVED_QUICK = 6; aPY>fy^8D
public final static int MERGE = 7; 82Z[eo
public final static int IMPROVED_MERGE = 8; E,ZB;
public final static int HEAP = 9; Mo/2,DiI5
&2<&X( )
public static void sort(int[] data) { !~w6"%2+7
sort(data, IMPROVED_QUICK); ?@g;[310`
} PJSDY1T
private static String[] name={ 61s2bt#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZH`K%h0
}; *`S)@'@:(
4}r\E,`*X
private static Sort[] impl=new Sort[]{ AK*mcTr
new InsertSort(), }jyS\drJ
new BubbleSort(), xsY>{/C
new SelectionSort(), dEAAm=K,<
new ShellSort(), 2EqsfU* I
new QuickSort(), =yhn8t7@]
new ImprovedQuickSort(), `DWi4y7
new MergeSort(), 5 vu_D^Q
new ImprovedMergeSort(), [#P`_hx
new HeapSort() =?`y(k4a
}; Nak'g/uP>
DO1N`7@o
public static String toString(int algorithm){ ^NnU gj
return name[algorithm-1]; U~){$kpI#
} l6}b{e
o?Tp=Ge
public static void sort(int[] data, int algorithm) { e8P!/x-y
impl[algorithm-1].sort(data); |/T<]+X;
} JQbMw>Y
28UL
public static interface Sort { yTq(x4]
public void sort(int[] data); }G,SqpcG
} @6i8RmOu}
&=6cz$]z
public static void swap(int[] data, int i, int j) { UVoLHd
int temp = data; 3q.[-.q
data = data[j]; .olPm3MC
data[j] = temp; 1$3XKw'
} faL^=CAe
} gQk#l\w_