[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; n^AQ!wC
} ,1+)qv#|i
int i1=l; 2Y@:Vgg
int i2=mid+1; q-fxs8+m|
for(int cur=l;cur<=r;cur++){ C&vUZa[p
if(i1==mid+1) BM&.Tw|x
data[cur]=temp[i2++]; >wpC45n)9N
else if(i2>r) #X(KW&;m
data[cur]=temp[i1++]; b!R\u1b
else if(temp[i1] data[cur]=temp[i1++]; 5@6%/='I q
else 02_%a1g
data[cur]=temp[i2++]; zMkjdjb
} *c+Kqz-
} y[s* %yP3l
s3*h=5bX=
} E K)7g~
j~eYq
改进后的归并排序: '@ym-\,
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package org.rut.util.algorithm.support; ^nYS@
n'yC-;
import org.rut.util.algorithm.SortUtil; (CRY$+d
CVh^~!"7j
/** K>2mm!{
* @author treeroot 8]N
* @since 2006-2-2 ^;b$`*M1
* @version 1.0 4|Dxyb>pS
*/ v(?^#C>6W
public class ImprovedMergeSort implements SortUtil.Sort { 06 kjJ4
cvR|qHNX
private static final int THRESHOLD = 10; AS34yM(h
5JE8/CbH
/* L {6y]t7^
* (non-Javadoc) ZE@!s3\
* sglYT!O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ng?n}$g*
*/ mX)UoiXue
public void sort(int[] data) { -0 [^w
int[] temp=new int[data.length]; ;&Q8xC2
mergeSort(data,temp,0,data.length-1); ;F@N2j#
} 0f).F
6% @@~"
private void mergeSort(int[] data, int[] temp, int l, int r) { qm-G=EX
int i, j, k; 28u)q2s^W|
int mid = (l + r) / 2; ~VZ)LQ'7
if (l == r) jg]_'^pVzr
return; tN&x6O+@
if ((mid - l) >= THRESHOLD) Fi+v:L|
mergeSort(data, temp, l, mid); YN1P9j#0d
else seh1(q?Va4
insertSort(data, l, mid - l + 1); :yN;_bC!b%
if ((r - mid) > THRESHOLD) Y_3{\g|x
mergeSort(data, temp, mid + 1, r); ozZW7dveU
else $=7[.z&
insertSort(data, mid + 1, r - mid); / AFn8=9'^
-iu7/4!j
for (i = l; i <= mid; i++) { ^YddVp
temp = data; A"t~ )
} CA7ZoMB#
for (j = 1; j <= r - mid; j++) { hr&&"d {s
temp[r - j + 1] = data[j + mid]; m}\G.$h4
} p2N;-
int a = temp[l]; D[2I_3[wp
int b = temp[r]; 6/ir("LK
for (i = l, j = r, k = l; k <= r; k++) { A)/ 8FYc
if (a < b) { Az29?|e
data[k] = temp[i++]; 5?+ECxPt
a = temp; tG(#&54
} else { byl#8=?
data[k] = temp[j--]; =B9Ama
b = temp[j]; `+_UG^aeW
} -lr)z=})
} eMk?#&a)
} D9 ~jMcX
rPVz!(;k
/** p\]Mf#B
* @param data *NdSL
* @param l `y5?lS*
* @param i Ca]+*Eb9z{
*/ R[Q`2ggG
private void insertSort(int[] data, int start, int len) { LeBuPR$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 413,O~^
} V!#+Ti/w4
} )UA$."~O
} 1|)l6#hOL
} ig(a28%
J<h^V+x
堆排序： 6/`$Y!.ub
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package org.rut.util.algorithm.support; >U\,(VB
:_;9&[H9ha
import org.rut.util.algorithm.SortUtil; kwRXNE(k]_
tz&'!n}
/** h2g|D(u)
* @author treeroot ">vxYi
* @since 2006-2-2 J%d\ 7
* @version 1.0 p=m)lR9
*/ s`W\`w}
public class HeapSort implements SortUtil.Sort{ J-t5kU;L{
KE3/sw0
/* (non-Javadoc) yyke"D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BgLW!|T[
*/ w '?xewx
public void sort(int[] data) { NF`WA-W8@
MaxHeap h=new MaxHeap(); Ox;q +5
h.init(data); f\O)+Vc
for(int i=0;i h.remove(); _" 0VM>
System.arraycopy(h.queue,1,data,0,data.length); J(+I`
} ^R.kThG
R/8>^6
private static class MaxHeap{ >%jQw.
}t!,{ZryE1
void init(int[] data){ C2RR(n=N^
this.queue=new int[data.length+1]; bl. y4
for(int i=0;i queue[++size]=data; ~e,k71
fixUp(size); CAg\-*P|
} 6x%uWZa'
} b#%s!
/Po't(-x
private int size=0; lWj{pyZ
-QR&]U+
private int[] queue; <eRE;8C-
9Z}Y2:l'
public int get() { n"YY:Gm;8
return queue[1]; ]k~k6#),;
} ,4$ZB(\
mY9^W2:
public void remove() { vt0XCUnK
SortUtil.swap(queue,1,size--); d~f_wN&r
fixDown(1); FHpS?htRy
} UJ-IK|P.#
file://fixdown emp*j@9
private void fixDown(int k) { a4HUP*
int j; +92/0
while ((j = k << 1) <= size) { v%O KOrJ
if (j < size %26amp;%26amp; queue[j] j++; 4DY\QvW5
if (queue[k]>queue[j]) file://不用交换 ((i%h^tGa;
break; Y;3DU1MG0
SortUtil.swap(queue,j,k); l);M(<
k = j; gMe)\5`\Y
} {E*dDv
} ,Bh!|H(?L1
private void fixUp(int k) { "~~Js~
while (k > 1) { JWhi*je
int j = k >> 1; TR:V7d
if (queue[j]>queue[k]) 5~&9/ALk5
break; 61e)SIRz9I
SortUtil.swap(queue,j,k); PCzC8~t
k = j; [DS.@97n
} * SH5p
} Ua^#.K
hl`4_`3y
} h}PeXnRU
]?!#*<t r
} 5U)Ia>p
qcau(#I9.
SortUtil： K=|x"6\
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package org.rut.util.algorithm; E^kB|; Ki
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import org.rut.util.algorithm.support.BubbleSort; x6Q,$B
import org.rut.util.algorithm.support.HeapSort; LIfQh
import org.rut.util.algorithm.support.ImprovedMergeSort; = GUgb2TAT
import org.rut.util.algorithm.support.ImprovedQuickSort; ;&mefaFlWp
import org.rut.util.algorithm.support.InsertSort; 9[yW&t;#
import org.rut.util.algorithm.support.MergeSort; N!R>L{H>
import org.rut.util.algorithm.support.QuickSort; TEQs\d
import org.rut.util.algorithm.support.SelectionSort; VF8pH<
import org.rut.util.algorithm.support.ShellSort; aLZza"W
nf#;]FijB
/** OW}ny
* @author treeroot -/ 5" Py
* @since 2006-2-2 DIrQ5C
* @version 1.0 IM-O<T6r[N
*/ #.1+-^TQk
public class SortUtil { \0gU)tVZ
public final static int INSERT = 1; jz CA2N%
public final static int BUBBLE = 2; }N@8zB~X
public final static int SELECTION = 3; R@ksYC3 F
public final static int SHELL = 4; 05o +VF;z
public final static int QUICK = 5; .|ZO2MCd
public final static int IMPROVED_QUICK = 6; A7U]wW9
public final static int MERGE = 7; }Xa1K;KM{
public final static int IMPROVED_MERGE = 8; !2YvG%t^6
public final static int HEAP = 9; -^C^3pms
. W ~&d_n
public static void sort(int[] data) { "{TVd>9_
sort(data, IMPROVED_QUICK); 2c)Ez?
} 94uAt&&b(
private static String[] name={ {,:yZ&(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CEQs}bz
}; b!lS=zIN
l~",<bTc
private static Sort[] impl=new Sort[]{ hj4!* c
new InsertSort(), r Uau??
new BubbleSort(), x-E@[=
new SelectionSort(), 4$~A%JN3
new ShellSort(), m$XMq
new QuickSort(), wk+| }s
new ImprovedQuickSort(), >#u9W'@|
new MergeSort(), wqx9
new ImprovedMergeSort(), LH_VdLds
new HeapSort() Sbzx7 *X
}; zDD
H6o_*Y
public static String toString(int algorithm){ }BFX7X
return name[algorithm-1]; 7+'&(^c
} zCz"[9k
HpCTQ\H
public static void sort(int[] data, int algorithm) { W!Qaa(o?
impl[algorithm-1].sort(data); :OEovk(`
} Vi9Kah+
xLN$!9t
public static interface Sort { ^*g= 65!1
public void sort(int[] data); @zs.M-F
} IjaFNZZC!
|BA&ixHe~C
public static void swap(int[] data, int i, int j) { 5MX7V4ist
int temp = data; x->H~/
data = data[j]; Rz03he
data[j] = temp; xj< K6
} Iz_#wO
} zg}#X6\G<_