[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; ]KUeSg|
} 9!dG Xq
int i1=l; +z~bH!$2
int i2=mid+1; < 7*9b
for(int cur=l;cur<=r;cur++){ ;2gO(
if(i1==mid+1) m,rkKhXP
data[cur]=temp[i2++]; 'W&ewZH_h
else if(i2>r) A5s;<d0
data[cur]=temp[i1++]; -x!JTx[K
else if(temp[i1] data[cur]=temp[i1++]; dvAz}3p0]
else 2=VFUR 8
data[cur]=temp[i2++]; r\C"Fx^
} eyn-bw
} u!FF{~5cs
60xL.Z
} !2.eJ)G
-^< t%{d
改进后的归并排序: DX/oHkLD'
JL7;l0#
package org.rut.util.algorithm.support; Y/L*0M.<
'sa>G
import org.rut.util.algorithm.SortUtil; c?Mbyay
+u`4@~D#
/** o"p['m*g
* @author treeroot nIfp0U*
* @since 2006-2-2 l4& l)4Rx
* @version 1.0 .OlPVMFt
*/ R I:kp.V
public class ImprovedMergeSort implements SortUtil.Sort { }LoMS<O-[
34J*<B[Njo
private static final int THRESHOLD = 10; `~NjBtQ
d@ ]N
/* KppYe9?
* (non-Javadoc) 2g5jGe*0
* n.G.fbO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [|\#cVWs
*/ KC8
public void sort(int[] data) { ]VS:5kOj`
int[] temp=new int[data.length]; {f;DhB-jj
mergeSort(data,temp,0,data.length-1); PE?ICou
} CF:!
G(bl)p^
private void mergeSort(int[] data, int[] temp, int l, int r) { V \/Qik{h
int i, j, k; 4Zn [F^p
int mid = (l + r) / 2; ffsF], _J
if (l == r) FRsp?i K)
return; 6A ptq
if ((mid - l) >= THRESHOLD) tHr4/
mergeSort(data, temp, l, mid); ~^fb`f+%
else a>,Zp*V(
insertSort(data, l, mid - l + 1); 6!([Hu#= *
if ((r - mid) > THRESHOLD) G[{Av5g mx
mergeSort(data, temp, mid + 1, r); >1` '5A}s
else hd`jf97*
insertSort(data, mid + 1, r - mid); z]2lT IWg
$h5QLN
for (i = l; i <= mid; i++) { J.]`l\
temp = data; %Nx,ZD@
} 7t/Y5Qf
for (j = 1; j <= r - mid; j++) { h\+8eeIl
temp[r - j + 1] = data[j + mid]; Y3SV6""y/
} 9I''$DVf
int a = temp[l]; S#Tu/2<}
int b = temp[r]; 8TTj<T!N
for (i = l, j = r, k = l; k <= r; k++) { e2L>"/
if (a < b) { `$3ktQ$
data[k] = temp[i++]; (U\D7ItMG
a = temp; moZeP#Q%
} else { :`uu[^
data[k] = temp[j--]; HmHM#~5(`
b = temp[j]; F6"s&3D{
} _v++NyZXx
} tqjjn5!
} 01NP
>4os%T
/** -C* 6>$A
* @param data uavyms^
* @param l {`(MK6D8 c
* @param i S>jOVWB
*/ E%a&6W
private void insertSort(int[] data, int start, int len) { Z/ L%?zH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K#VGG,h7Y
} { _Y'%Ggh
} \C{Zqo,
} /)<kG(Z
} .kJu17!
&>G8DvfJ9
堆排序： J|VDZ# c7
Y' 5X4Ks|
package org.rut.util.algorithm.support; ja(ZJ[<`
r,Msg&rT
import org.rut.util.algorithm.SortUtil; dV-6l6
T&}KUX~Q/
/** b~(S;1NS'
* @author treeroot 5Fbb5`(
* @since 2006-2-2 FtlJ3fB@
* @version 1.0 b;NVvc(
*/ fUPYCw6F
public class HeapSort implements SortUtil.Sort{ D}UgC\u
8<@X=Z
/* (non-Javadoc) qxYCT$1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s4Vju/
*/ }vg|05L
public void sort(int[] data) { uO1^nK
MaxHeap h=new MaxHeap(); 7p>T6jK)
h.init(data); r>.l^U9hJ
for(int i=0;i h.remove(); Qh*}v!3Jo
System.arraycopy(h.queue,1,data,0,data.length); x'SIHV4M@Q
} c5pK%I}O
5'%O]~
private static class MaxHeap{ J/PK#<
'{cFr
void init(int[] data){ 6rO^ p
this.queue=new int[data.length+1]; `G=+qti
for(int i=0;i queue[++size]=data; LLoV]~dvUu
fixUp(size); 12Fnv/[n'K
} I*/:rb
} !)05,6WQ
C:f^&4 3
private int size=0; 735l&(3A\
%4BQY>O)@
private int[] queue; w{]B)>! 1W
ch0cFF^]
public int get() { `S4G+j>u6
return queue[1]; 3K/]{ dkD
} vG=Pi'4XXo
x@:98P
public void remove() { qoW$Iw*q)B
SortUtil.swap(queue,1,size--); m |.0$+=
fixDown(1); ' -aLBAxy
} TGjxy1A
file://fixdown XjYMp3
private void fixDown(int k) { ^9YS dFH/
int j; ^PMA"!n8
while ((j = k << 1) <= size) { 8v)HTD/C
if (j < size %26amp;%26amp; queue[j] j++; 0BAZWm
if (queue[k]>queue[j]) file://不用交换 _T=";NSa
break; y{XNB}E
SortUtil.swap(queue,j,k); c)q=il7ef
k = j; -x?|[ +%
} rxZk!- t)L
} uVXn/B
private void fixUp(int k) { vY[u;VU
while (k > 1) { %f(4jQ0I
int j = k >> 1; _ -,[U{
if (queue[j]>queue[k]) e$mVA}>Ybp
break; MR,A{X
SortUtil.swap(queue,j,k); YeB C6`7y
k = j; {yi!vw
} #kJ8 qN
} O.aAa5^uh
,V&E"D{u
} 7dlMDHp\Y
rERtOgi
} */vid(P77
Z$35`:x&h
SortUtil： w2U]RI\?2
'z+Pa^)v
package org.rut.util.algorithm; v~p?YYOm<
9>_VU"T
import org.rut.util.algorithm.support.BubbleSort; ,3)JZM
import org.rut.util.algorithm.support.HeapSort; f,BJb+0
import org.rut.util.algorithm.support.ImprovedMergeSort; ]HRHF'4
import org.rut.util.algorithm.support.ImprovedQuickSort; DvA#zX[
import org.rut.util.algorithm.support.InsertSort; P#;pQC
import org.rut.util.algorithm.support.MergeSort; kjSzuqB
import org.rut.util.algorithm.support.QuickSort; -7EwZRS@9
import org.rut.util.algorithm.support.SelectionSort; 64:p 4N
import org.rut.util.algorithm.support.ShellSort; sr~VvciIy
`2xt%kC
/** z3w;W{2Q;V
* @author treeroot ;]rj Kc=
* @since 2006-2-2 !=+;9Ry$z
* @version 1.0 Q0xQxz
*/ Z(J 1A x
public class SortUtil { 8"u.GL.
public final static int INSERT = 1; ?w)A`G_
public final static int BUBBLE = 2; i_I`
public final static int SELECTION = 3; ]!@!qp@
public final static int SHELL = 4; J.0&gP V
public final static int QUICK = 5; TJ,?C$3
public final static int IMPROVED_QUICK = 6; F[fs^Q6S$
public final static int MERGE = 7; Kke _?/fT
public final static int IMPROVED_MERGE = 8; U/7jK40
public final static int HEAP = 9; uR!'v
ux[13]yY
public static void sort(int[] data) { rPHM_fW(O@
sort(data, IMPROVED_QUICK); )P.,h&h/
} [c99m:*+
private static String[] name={ sr:hRQ27
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7 S%`]M4;
}; UG<<.1JL
WkoYkkuzj
private static Sort[] impl=new Sort[]{ pU u')y
new InsertSort(), D P:}<
new BubbleSort(), %\%&1
new SelectionSort(), mn\GLR.
new ShellSort(), Qb:.WMj[q+
new QuickSort(), XK(aH~7xme
new ImprovedQuickSort(), nYK!'x$
new MergeSort(), vE~<R
new ImprovedMergeSort(), 4 @9cO)m
new HeapSort() Lf8{']3
}; s1T}hp
14y>~~3C4
public static String toString(int algorithm){ <-Ax)zE
return name[algorithm-1]; @$wfE\_L
} YJwffV}nd
};cH5bYF
public static void sort(int[] data, int algorithm) { S @)P#
impl[algorithm-1].sort(data); U,aMv[ZB
} hllb\Y)XL
D,s[{RW+q
public static interface Sort { Btc[
public void sort(int[] data); "VAbUs
} UD5f+,_;
/{Z<!7u;U
public static void swap(int[] data, int i, int j) { 2{L[D9c/6
int temp = data; y$L&N0z
data = data[j]; /j(<rz"j
data[j] = temp; w1= f\
} K*"Fpx{M
} L!2Ef4,wAz