[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; #Cwzk{p(
} !7m )QNV
int i1=l; .7BB*!CP
int i2=mid+1; =:|fN3nJ2
for(int cur=l;cur<=r;cur++){ ylV.ZoY6
if(i1==mid+1) ;}=4z^^5
data[cur]=temp[i2++]; ndsu}:my
else if(i2>r) U%Igj:%?;`
data[cur]=temp[i1++]; H-*"%SJ
else if(temp[i1] data[cur]=temp[i1++]; uv:DO6 {
else ]<V,5'xh
data[cur]=temp[i2++]; )2U#<v^
} E^RPK{zO
} !A.Kb74
:sMc}k?9S
} -:5]*zVp+-
q ;@:,^
改进后的归并排序: 4z~%gt74O]
7\BGeI
package org.rut.util.algorithm.support; D^E+#a 1
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import org.rut.util.algorithm.SortUtil; ?z:Xdx\l
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/** OT&mNE4
* @author treeroot xaiA?
* @since 2006-2-2 if S) < t
* @version 1.0 Jb~nu
*/ .] S{T
public class ImprovedMergeSort implements SortUtil.Sort { UE3#(:xA
P5:X7[
private static final int THRESHOLD = 10; ,W'?F9Y\
B{D!5{t
/* ^:b%QO
* (non-Javadoc) n..9F$a
* c'9-SY1'~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1I#S?RSb
*/ Iw?M>'l
public void sort(int[] data) { YWfw%p?n"
int[] temp=new int[data.length]; u6~|].j R
mergeSort(data,temp,0,data.length-1); nUZ+N)*
} uW.)(l
c8o$WyO
private void mergeSort(int[] data, int[] temp, int l, int r) { K%Sy~6iD&
int i, j, k; $X.X_
int mid = (l + r) / 2; Unl6?_
if (l == r) jLULf+8&
return; zU+` o?al
if ((mid - l) >= THRESHOLD) KcGM=z?:
mergeSort(data, temp, l, mid); fbbk;Rq.'3
else #&Zb8HAj
insertSort(data, l, mid - l + 1); oQrkd:
if ((r - mid) > THRESHOLD) 9d7$Fz#
mergeSort(data, temp, mid + 1, r); ^-CQ9r*
else sW#}QYd
insertSort(data, mid + 1, r - mid); Bn7~p+N
!MOgM
for (i = l; i <= mid; i++) { >L#HE
temp = data; p^G:h6|+|
} =YPvh]][
for (j = 1; j <= r - mid; j++) { y<|vcg8x
temp[r - j + 1] = data[j + mid]; UB3b
} LL~bq(b
int a = temp[l]; uvo2W!
int b = temp[r]; 3{mu77
for (i = l, j = r, k = l; k <= r; k++) { e1e2Wk
if (a < b) { J%?'Q{
data[k] = temp[i++]; Z4\$h1tl
a = temp; _)q,:g~fu
} else { \W<r`t4v
data[k] = temp[j--]; +U(m b
b = temp[j]; *D: wwJ
} *@'\4OO
} *QzoBpO<
} VP4W~;UV|\
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/** ^L&hwXAO:
* @param data ;cBFft}D
* @param l %N!2 _uk5
* @param i 7`^]:t
*/ `I.Uw$,P
private void insertSort(int[] data, int start, int len) { kRBPl99
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mlgw0
} K0xZZ`
} O!!Ne'I
} K!q:A+]
} gi;#?gps
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堆排序： I!y[7^R
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package org.rut.util.algorithm.support; g;U f?
56Q9RU(M
import org.rut.util.algorithm.SortUtil; 2}P<}-?6
NGHzifaE
/** \2!v~&S
* @author treeroot Gc) Zu`67
* @since 2006-2-2 Z6<vLc
* @version 1.0 i"uAT$xe
*/ 0zg\thL
public class HeapSort implements SortUtil.Sort{ CB5 ~!nKv&
T,h,)|:I^
/* (non-Javadoc) ZbJUOa?WF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y%CaaK=V3
*/ iP1u u
public void sort(int[] data) { 'J^E|1P
MaxHeap h=new MaxHeap(); jV^Dj
h.init(data); ".z~c%'
for(int i=0;i h.remove(); UOrfwK
System.arraycopy(h.queue,1,data,0,data.length); 'vO+,-
} ;|v6^2H"
8H_3.MK
private static class MaxHeap{ }}v04~
2U6j?MyH2
void init(int[] data){ U$KdY _Z97
this.queue=new int[data.length+1]; vVF#]t b|
for(int i=0;i queue[++size]=data; i]Or'L0c
fixUp(size); 9V&%_.Z
} NfcQB;0
} $smzP.V
e.eQZ5n~q`
private int size=0; C !81Km5
KYY~ YP
private int[] queue; wU.K+4-k
,D-VC{lj
public int get() { 2~+Iu+
return queue[1]; x,"'\=|s*
} ;p%a!Im_<
XA{tVh
public void remove() { dX0A(6
SortUtil.swap(queue,1,size--); 5EDM?G
fixDown(1); 6C>x,kU
} ni gp83:
file://fixdown }2M2R}D
private void fixDown(int k) { "(ehf|%>%
int j; 93:s[bmx
while ((j = k << 1) <= size) { w}pFa76rm
if (j < size %26amp;%26amp; queue[j] j++; ['m@RJm+
if (queue[k]>queue[j]) file://不用交换 4f~hd-z
break; w5|az6wZB!
SortUtil.swap(queue,j,k); u2'xM0nQ
k = j; pLL ^R
} BvpGP
} `':$PUz,g
private void fixUp(int k) { =!r9;L,?
while (k > 1) { 2a2C z'G
int j = k >> 1; 5B| iBS l
if (queue[j]>queue[k]) R%XbO~{u
break; cYdk,N
SortUtil.swap(queue,j,k); .Vq-<c%
k = j; o9~Z! &p
} $Y][-8{t
} DGdSu6s$
[|V<e+>T/
} vWI9ocl`W
t)XNS!6#]?
} pm O}m>
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SortUtil： IZeWswz
? e%Pvy<i
package org.rut.util.algorithm; $I!vQbi
Ph2jj,K
import org.rut.util.algorithm.support.BubbleSort; !0ySS {/
import org.rut.util.algorithm.support.HeapSort; Z6SM7?d
import org.rut.util.algorithm.support.ImprovedMergeSort; [2.uwn]i
import org.rut.util.algorithm.support.ImprovedQuickSort; K=VYRY
import org.rut.util.algorithm.support.InsertSort; 5[[4A]#T
import org.rut.util.algorithm.support.MergeSort; ~j",ePl
import org.rut.util.algorithm.support.QuickSort; ?AX./LI
import org.rut.util.algorithm.support.SelectionSort; L~SM#?z:ue
import org.rut.util.algorithm.support.ShellSort; F))+a&O
>F6'^9|
/** bl(rCbj(w
* @author treeroot %7pT\8E5
* @since 2006-2-2 =:mD)oX*
* @version 1.0 _kl.zw%
*/ >}GtmnF
public class SortUtil { !6\{q M
public final static int INSERT = 1; G%-[vk#]
public final static int BUBBLE = 2; |2AK~t|t
public final static int SELECTION = 3; B.6gJ2c
public final static int SHELL = 4; I/rq@27o
public final static int QUICK = 5; 7qq}wR]]
public final static int IMPROVED_QUICK = 6; O8TAc]B
public final static int MERGE = 7; 1XUsr;Wz
public final static int IMPROVED_MERGE = 8; 3|-)]^1O
public final static int HEAP = 9; ])egke\!
DG}t!
public static void sort(int[] data) { y[oc^Zuo
sort(data, IMPROVED_QUICK); Q3u P7j
} +rfw)c'
private static String[] name={ 5;oWFl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h)7{Cj
}; z{Z'2,#
6%~ Z^>`N
private static Sort[] impl=new Sort[]{ rR&;2
new InsertSort(), eaCv8zdX
new BubbleSort(), s6%%/|
new SelectionSort(), 9lNO ~8
new ShellSort(), g"c\ouSY
new QuickSort(), A?<R9A
new ImprovedQuickSort(), DXl3
new MergeSort(), yt}Ve6 m
new ImprovedMergeSort(), thIuK V{CO
new HeapSort() zMxHJNQ\D
}; d}j%.JJK
kL\ FY
public static String toString(int algorithm){ n|sP0,$N1
return name[algorithm-1]; ET;YAa*
} HWOs
b1JXC=*@
public static void sort(int[] data, int algorithm) { {DJ!T
impl[algorithm-1].sort(data); =v]\{.
} X|fl_4NC>
q}p&<k
public static interface Sort { |N/Grk4
public void sort(int[] data); $OB2ZS"
} F9p'|-
ad1I2
public static void swap(int[] data, int i, int j) { ?-%Q[W
int temp = data; I},.U&r
data = data[j]; N^z4I,GV(
data[j] = temp; 89o&KF]
} 1Kszpt(Ld
} zrVw l\&