[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; PlwM3lrj
} R%`fd *g
int i1=l; #6C<P!]V
int i2=mid+1; I[n|#N
for(int cur=l;cur<=r;cur++){ #wsi><7
if(i1==mid+1) ^Iqu^n?2.
data[cur]=temp[i2++]; equi26jhr
else if(i2>r) y=AF EP
data[cur]=temp[i1++]; Th$xk9TK^@
else if(temp[i1] data[cur]=temp[i1++]; .S]*A b
else @h/-P'Lc=7
data[cur]=temp[i2++]; .dwbJT
} 6d3YLb4M$i
} t~":'le`zr
8=g~+<A
} p ^9o*k`u
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改进后的归并排序: (&X/n=UI
KWM}VZY:Z
package org.rut.util.algorithm.support; 7R,;/3wWjG
Uz%ynH
import org.rut.util.algorithm.SortUtil; Zu94dFP
q(v|@l|)yO
/** bEmzigN[
* @author treeroot zT93Sb
* @since 2006-2-2 d?V/V'T[
* @version 1.0 f*VXg[&\\F
*/ C 1)+^{7ef
public class ImprovedMergeSort implements SortUtil.Sort { 2#s8Dxt
$UpWlYwG
private static final int THRESHOLD = 10; aq#F
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/* UUF]45t>
* (non-Javadoc) SWyJ`
* SH O&:2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~(:0&w%e
*/ ,R=$qi|
public void sort(int[] data) { ~g;)8X;;+
int[] temp=new int[data.length]; 1-Dw-./N
mergeSort(data,temp,0,data.length-1); 3\cx(
} CZ =]0zB
nQ{~D5y,,
private void mergeSort(int[] data, int[] temp, int l, int r) { ^AERGB\36
int i, j, k; zjzEmX
int mid = (l + r) / 2; -z%->OUu
if (l == r) KEf1GU6s
return; ;j+*}|!
if ((mid - l) >= THRESHOLD) xc7Rrh]}
mergeSort(data, temp, l, mid); '}-QZ$|*
else 9WV8ZP
insertSort(data, l, mid - l + 1); PH'n`D#
if ((r - mid) > THRESHOLD) XV,ce~ro[
mergeSort(data, temp, mid + 1, r); IYa(B+nB)
else e*d lGK3l
insertSort(data, mid + 1, r - mid); A+FQmLS
X1BqN+=@9
for (i = l; i <= mid; i++) { Dn#UcMO>W
temp = data; We'=/!
} ?a'EkZ.dB
for (j = 1; j <= r - mid; j++) { SL +\{V2
temp[r - j + 1] = data[j + mid]; ]Rxrt~ ZB
} `YO&
int a = temp[l]; 6o*'Q8h
int b = temp[r]; U/xzl4m6
for (i = l, j = r, k = l; k <= r; k++) { L@f&71
if (a < b) { ]v:"
data[k] = temp[i++]; fA=Lb^,M
a = temp; ezri9\Ju
} else { {\|XuCF#
data[k] = temp[j--]; fuWAw^&
b = temp[j]; vFeR)Ox's
} GH&5m44
} z)Yb9y>2
} *z0Rf;
;ULw-&]P
/** %Z8pPH~T
* @param data a)7&2J
* @param l muKu@nshL
* @param i ++ObsWZ
*/ @X=sfygk
private void insertSort(int[] data, int start, int len) { R[TaP7n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g4;|uK;
} `S4G+j>u6
} 3K/]{ dkD
} vG=Pi'4XXo
} =\\rk,F
.k#O[^~]
堆排序： Cv p#=x0
#Yy5@A}`o
package org.rut.util.algorithm.support; 3_T'0x\FP
u=E &jL5U
import org.rut.util.algorithm.SortUtil; 8cRc5X
qoW$Iw*q)B
/** A;f)`i0l,
* @author treeroot -O?A"
* @since 2006-2-2 <TSps!(#
* @version 1.0 !>&G+R+k
*/ J%fJF//U
public class HeapSort implements SortUtil.Sort{ a FWTm,)
g;:3I\L
/* (non-Javadoc) $"#M:V@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +aqQa~}r
*/ `V.tqZF
public void sort(int[] data) { D%=&euB
MaxHeap h=new MaxHeap(); ;6?,Yhk$h
h.init(data); 0rif,{"
for(int i=0;i h.remove(); >:0N)Pj
System.arraycopy(h.queue,1,data,0,data.length); auM1k]
} 7 Rc/<,X
?q0a^c?A^
private static class MaxHeap{ uwt29
tA9Ew{3s
void init(int[] data){ FRQkD%k
this.queue=new int[data.length+1]; .mOm@<Xdg
for(int i=0;i queue[++size]=data; u!fZ>kS
fixUp(size); 6.a>7-K}%
} ^{NN-
} 0XE(vc!
/Wdrpv-%,1
private int size=0; ,eL&Ner
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private int[] queue; Cn.dv-
Upm#:i|"
public int get() { "g(q)u >
return queue[1]; PI8ag
} h-o;vC9fC
TaKCN
public void remove() { "`'+@KlE
SortUtil.swap(queue,1,size--); ur]WNk8bN
fixDown(1); UY:Be8C A
} WJ 'lYl0+7
file://fixdown ]]5(:>l
private void fixDown(int k) { F'_z$,X6
int j; ]HRHF'4
while ((j = k << 1) <= size) { DvA#zX[
if (j < size %26amp;%26amp; queue[j] j++; P#;pQC
if (queue[k]>queue[j]) file://不用交换 kjSzuqB
break; -7EwZRS@9
SortUtil.swap(queue,j,k); 64:p 4N
k = j; 3@<m/%
} TETfRnm
} qzk]9`i1:
private void fixUp(int k) { JBISA _Y
while (k > 1) { hG}/o&}U
int j = k >> 1; ! e?=g%(
if (queue[j]>queue[k]) h^J :k
break; Exat_ L'?
SortUtil.swap(queue,j,k); 4dh>B>Q
k = j; b}N\h<\G
} jank<Q&w
} j\.e6&5%SS
^Je*k)COn
} D9n+eZ
9YBlMf`KEf
} 9,}Z1 f\%
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SortUtil： YKx+z[A/p
Zh?n;n}
package org.rut.util.algorithm; M@0S*[O{"
)EN,Ry
import org.rut.util.algorithm.support.BubbleSort; 26j-1c!NGd
import org.rut.util.algorithm.support.HeapSort; `EiL~*
import org.rut.util.algorithm.support.ImprovedMergeSort; LBcqFvj{&
import org.rut.util.algorithm.support.ImprovedQuickSort; lI5>d(6p
import org.rut.util.algorithm.support.InsertSort; rhN"#?
import org.rut.util.algorithm.support.MergeSort; /]nrxT
import org.rut.util.algorithm.support.QuickSort; ?X7nM)
import org.rut.util.algorithm.support.SelectionSort; Wx8;+!2Q/
import org.rut.util.algorithm.support.ShellSort; BJsN~`=r
t4-0mNBZt$
/** fY|vq amA;
* @author treeroot ~\c j
* @since 2006-2-2 pFwe&_u]
* @version 1.0 AUl[h&s
*/ Q2!RFtXV
public class SortUtil { Q%t _Epe
public final static int INSERT = 1; wJ7Fnj>u%
public final static int BUBBLE = 2; ASNo6dP7
public final static int SELECTION = 3; >DW%i\k1V~
public final static int SHELL = 4; *#'&a(hB!
public final static int QUICK = 5; >SD?MW1E
public final static int IMPROVED_QUICK = 6; v\XO?UEJ2
public final static int MERGE = 7; Xd&oERJj
public final static int IMPROVED_MERGE = 8; K%/g!t)
public final static int HEAP = 9; ]oC7{OoX
'qidorT>N
public static void sort(int[] data) { f{'NO`G
sort(data, IMPROVED_QUICK); JJP!9<
} y<y9'tx
private static String[] name={ 2}ywNVS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L_>LxF43
}; <XnxAA
J!zL)u|
private static Sort[] impl=new Sort[]{ o1Wf#Zq
new InsertSort(), G:MQ_tfr&
new BubbleSort(), |:d_IB@
new SelectionSort(), ?gXdi<2Qn
new ShellSort(), V#+J4
new QuickSort(), f:9qId ;/M
new ImprovedQuickSort(), L!2Ef4,wAz
new MergeSort(), \(1WLP$2U
new ImprovedMergeSort(), cty
new HeapSort() )KYU[
}; 6x8lnXtA
qp]sVY
public static String toString(int algorithm){ 4WQ 96|F
return name[algorithm-1]; m=]}Tn
} *@&V=l
"6iq_!#L
public static void sort(int[] data, int algorithm) { A@w9_qo
impl[algorithm-1].sort(data); v<?k$ e5
} By0Zz
$tebNiP
public static interface Sort { v1E(K09h2
public void sort(int[] data); JRw)~Tg @
} zZ])G
46c0;E\9
public static void swap(int[] data, int i, int j) { ?qtL*;
int temp = data; BCr*GtR)W
data = data[j]; 5OC3:%g
data[j] = temp; <P c;8[
} mmEe@-lE
} ~G~:R