[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; +zL|j/q?
} duq(K9S
int i1=l; |)[I$]L
int i2=mid+1; S(ky:
for(int cur=l;cur<=r;cur++){ kb~;s-$O`s
if(i1==mid+1) >[r,X$]
data[cur]=temp[i2++]; n1
else if(i2>r) Usl963A#'F
data[cur]=temp[i1++]; CwdeW.A"j
else if(temp[i1] data[cur]=temp[i1++]; h#~\-j9>
else Qk[YF
data[cur]=temp[i2++]; 08MY=PC~R
} (,XbxDfM
} VBq|j"o0"
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} ={G0p=~+,p
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改进后的归并排序: 8$~^-_>n/
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package org.rut.util.algorithm.support; Wo2W/{
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import org.rut.util.algorithm.SortUtil; |E?,hTRe5
ZGsI\3S
/** y"T(Unvc
* @author treeroot KJYcP72P
* @since 2006-2-2 HaA2y
* @version 1.0 t$EL3U/(
*/ +aZcA#%
public class ImprovedMergeSort implements SortUtil.Sort { p?V@P6h
W!o|0u!D
private static final int THRESHOLD = 10; 3k# h!Z
Xx?~%o6
/* Msst:}QY
* (non-Javadoc) ]S+KH \2
* Y_= ]w1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *b,4qMr
*/ h1Nd1h@-
public void sort(int[] data) { 60--6n
int[] temp=new int[data.length]; yN{TcX
mergeSort(data,temp,0,data.length-1); Csf!I@}Z
} _~.S~;o!b
]Ei*I}
private void mergeSort(int[] data, int[] temp, int l, int r) { m"f3hd4D_q
int i, j, k; 3,yzRb
int mid = (l + r) / 2; tRVz4fk[G
if (l == r) lnQY_~s
return; IBYSI0
if ((mid - l) >= THRESHOLD) $nqVE{ksV
mergeSort(data, temp, l, mid); YLv5[pV
else VM}7 ~
insertSort(data, l, mid - l + 1); @ D.MpM}~
if ((r - mid) > THRESHOLD) L/xTW
mergeSort(data, temp, mid + 1, r); *X\J[$!
else :6jh*,OHZl
insertSort(data, mid + 1, r - mid); ,B1~6y\b
?bGk%jjHXM
for (i = l; i <= mid; i++) { h|%a}])G)
temp = data; zGtv(gwk
} !rTkH4!_
for (j = 1; j <= r - mid; j++) { })umg8s
temp[r - j + 1] = data[j + mid]; ]{ir^[A6
} Cs'<;|r(
int a = temp[l]; vw6DHN)k
int b = temp[r]; \rM5@ Vf
for (i = l, j = r, k = l; k <= r; k++) { ows3%
if (a < b) { +}x\|O
data[k] = temp[i++]; O39f
a = temp; |ngv{g
} else { i\dd
data[k] = temp[j--]; ']U<R=5T$
b = temp[j]; yrG=2{I
} S*V!t=
} q,T4- E
} DCKH^J
N(`XqeC*
/** Pos(`ys;
* @param data h9kwyhd"
* @param l \49s;\I]
* @param i "sYZ3
*/ 3QDz9KwCAw
private void insertSort(int[] data, int start, int len) { ?$.JgG%Z+g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6,~]2H'zq
} y' RQ_Gi
} >';UF;\5]Q
} 9`tSg!YOh
} |#ZMZmo{
[Om,Q<
堆排序： e=`=7H4P
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package org.rut.util.algorithm.support; e.WKf,e"X
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import org.rut.util.algorithm.SortUtil; v}TFM
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/** %5!K?,z%
* @author treeroot <72q^w
* @since 2006-2-2 NA+7ey6
* @version 1.0 yX.; x 0
*/ HcM/
public class HeapSort implements SortUtil.Sort{ 5'/ff=
Y)2#\ F
/* (non-Javadoc) (qzBy \\p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '7 t:.88
*/ 2 ZyO
public void sort(int[] data) { q!{>Nlk
MaxHeap h=new MaxHeap(); nh+Hwj#(x
h.init(data); oSLm?Lu
for(int i=0;i h.remove(); uyvjo)T
System.arraycopy(h.queue,1,data,0,data.length); o(yyj'=(
} Id=V\'$o
0ax;Q[z2
private static class MaxHeap{ @H$Sv
PR7B Cxm
void init(int[] data){ sh*/wM
this.queue=new int[data.length+1]; kS4YxtvB
for(int i=0;i queue[++size]=data; 40G'3HOp
fixUp(size); zEt!Pug
} W'6sY@0m
} F+!9T
aU*}.{<!
private int size=0; }/QtIY#I
Vwb_$Yi+]
private int[] queue; FuC\qF
xdh%mG:?
public int get() { \027>~u {
return queue[1]; JCci*F#r
} MzH'<`;BP
MlR]+]
public void remove() { W;?e@}
SortUtil.swap(queue,1,size--); OZEbs 7
fixDown(1); intl?&wC
} xlH3t&i7
file://fixdown :!JQ<kV
private void fixDown(int k) { mbns%%GJU
int j; 3vdFO: j
while ((j = k << 1) <= size) { 4v`G/w
if (j < size %26amp;%26amp; queue[j] j++; CSY-{
if (queue[k]>queue[j]) file://不用交换 R6TT1Ka3c
break; 7^syu;DT9Y
SortUtil.swap(queue,j,k); t N4-<6
k = j; "R"{xOQl
} @w;$M]o1
} Oh%p1$H
private void fixUp(int k) { b!r%4Ah
while (k > 1) { qkqtPbQ 7
int j = k >> 1; c Qe3
if (queue[j]>queue[k]) `g<0FQA
break; frc9
SortUtil.swap(queue,j,k); v3{%U1>}v
k = j; \VWgF)_
} \/b[V3<"
} F"1tPWn
N 1ydL
} gq@8Z AWn
;*0nPhBw0>
} 2.vmZaKP
CY.4>,
SortUtil： 1Vc~Sa
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package org.rut.util.algorithm; 6s'n r7'0
YRMe<upo
import org.rut.util.algorithm.support.BubbleSort; jib pZ)
import org.rut.util.algorithm.support.HeapSort; &xZSM,
import org.rut.util.algorithm.support.ImprovedMergeSort; `z$P,^g`
import org.rut.util.algorithm.support.ImprovedQuickSort; UyFC\vQ
import org.rut.util.algorithm.support.InsertSort; 4sW'pH
import org.rut.util.algorithm.support.MergeSort; u%lUi2P2E
import org.rut.util.algorithm.support.QuickSort; kP'm$+1or
import org.rut.util.algorithm.support.SelectionSort; p:W{c/tV
import org.rut.util.algorithm.support.ShellSort; 5nTcd@lX
":q+"*fy
/** *Ms&WYN-
* @author treeroot I;n<) >
* @since 2006-2-2 5{#s<%b.
* @version 1.0 =iH9=}aBFC
*/ o1"N{Eu
public class SortUtil { ZH*h1?\X
public final static int INSERT = 1; 62MQ+H
public final static int BUBBLE = 2; ={f8s,m)P,
public final static int SELECTION = 3; |3 Iug
public final static int SHELL = 4; [4aw*M1z}.
public final static int QUICK = 5; ]0BX5Z'
public final static int IMPROVED_QUICK = 6; ooBBg@
public final static int MERGE = 7; S^D7}
public final static int IMPROVED_MERGE = 8; *?$M=tH
public final static int HEAP = 9; n`@dk_%yI
&SNH1b#>E
public static void sort(int[] data) { sT "q]
sort(data, IMPROVED_QUICK); i+pQ 7wx
} c&,q`_t
private static String[] name={ oz]&=>$1I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \ \Tz'>[\
}; D[}^G5
t&NpC;>v
private static Sort[] impl=new Sort[]{ UR9\g(
new InsertSort(), ,7k-LAA
new BubbleSort(), ALcPbr
new SelectionSort(), z"mpwmv5
new ShellSort(), Go^TTL
new QuickSort(), ><>%;HZ
new ImprovedQuickSort(), h&n1}W+
new MergeSort(), s~bi#U;dF
new ImprovedMergeSort(), ~I9o*cq
new HeapSort() "RM\<)IF
}; 7=5eLc^
T\(k=0RM
public static String toString(int algorithm){ ,I ][
return name[algorithm-1]; >]&Ow9-
} La3rX
k{=dV
public static void sort(int[] data, int algorithm) { +S[3HX7H
impl[algorithm-1].sort(data); Z[ &d2'
} 0w0{@\9
$zU%?[J
public static interface Sort { $d!Vxm
public void sort(int[] data); H5&._
} co1aG,>"q
rZcSG(d`53
public static void swap(int[] data, int i, int j) { tbiM>qxB
int temp = data; mQR9Pn}H
data = data[j]; }S3 oX$
data[j] = temp; F#M(#!)Y"
} RgL>0s
} + d3