[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; pqUCqo!m\
} `J]fcE%T0R
int i1=l; ,PlO8;5]
int i2=mid+1; syk!7zfK
for(int cur=l;cur<=r;cur++){ nv)2!mAh\
if(i1==mid+1) )X04K~6lY
data[cur]=temp[i2++]; :z}MIuf
else if(i2>r) ag$Vgl
data[cur]=temp[i1++]; .b\$MZ"(
else if(temp[i1] data[cur]=temp[i1++]; 3Uqr,0$p
else -r#X~2tPzD
data[cur]=temp[i2++]; @vpf[j
} Q=BZ N]g2
} m#ZO`W
U ?'vXa
} y'FS/=u>0
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改进后的归并排序: ~jK{ ,$:=
t(GR)&>.2
package org.rut.util.algorithm.support; pp.6Ex (R
x??pBhJH
import org.rut.util.algorithm.SortUtil; ]DZE%
{)DHH:n
/** ktK_e
* @author treeroot ~CtL9m3tO
* @since 2006-2-2 iY`%SmB
* @version 1.0 MWI4Y@1bS
*/ |nbf'
public class ImprovedMergeSort implements SortUtil.Sort { sBu=e7
VmCW6 G#M
private static final int THRESHOLD = 10; :q ti
ii%+jdi.
/* CL)lq)1(
* (non-Javadoc) DKfE.p)
* :}r.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uqM yoIc
*/ f}Np/
public void sort(int[] data) { vgD {qg@
int[] temp=new int[data.length]; ,REJt
mergeSort(data,temp,0,data.length-1); RlheQTJ
} hOFOO_byzO
I96Ci2)m
private void mergeSort(int[] data, int[] temp, int l, int r) { !h(|\" }
int i, j, k; \(VTt|}By$
int mid = (l + r) / 2; I6j$X6u
if (l == r) ,QC{3i~
return; ^F2b hXE
if ((mid - l) >= THRESHOLD) 3k|oK'l
mergeSort(data, temp, l, mid); cUqke+!
else H_EB1"C;\
insertSort(data, l, mid - l + 1); |?Frj
if ((r - mid) > THRESHOLD) 0E?jW7yr
mergeSort(data, temp, mid + 1, r); YhbZ'SJ
else *\(r+>*x*
insertSort(data, mid + 1, r - mid); -6Oz^
6&DX] [G
for (i = l; i <= mid; i++) { i O/K nH
temp = data; 9Rn? :B~W:
} {n/uh0>f*
for (j = 1; j <= r - mid; j++) { ;l&4V
temp[r - j + 1] = data[j + mid]; I/M_p^
} so)"4 SEu
int a = temp[l]; jx.[#6e
int b = temp[r]; MS>t_C(
for (i = l, j = r, k = l; k <= r; k++) { rSxxH]-
if (a < b) { Q?8R[i
data[k] = temp[i++]; ^ "i l}8`
a = temp; @o#!EfZyE
} else { _9tK[/h
data[k] = temp[j--]; RletL)
b = temp[j]; QYa(N[~a
} @Ys!DScY,
} !:|TdYrmj
} y;t6sM@
@[#$J0qq
/** s <
* @param data W?0 lV5/
* @param l qb5#_1qz+^
* @param i ysmNio
*/ ?pYKZg/c
private void insertSort(int[] data, int start, int len) { U7!.,kR-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %|^OOU}
} )x}l3\s
} *<E]E?
} 'xhcuVl
} o;W`4S^
$e\h}A6
堆排序： 1z&Ly3
cTD!B% x
package org.rut.util.algorithm.support; uC8L\UXk
Q:|l`*.R
import org.rut.util.algorithm.SortUtil; K=C!b?
oY1';&BO9
/** rj6tZJZ#o0
* @author treeroot Ma'_e=+A
* @since 2006-2-2 =Zu^80/
* @version 1.0 /n5F(5<
*/ %q!8={J8
public class HeapSort implements SortUtil.Sort{ T[,/5J
FP0G]=ME
/* (non-Javadoc) HDda@Jy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {fha`i
*/ pl5P2&k
public void sort(int[] data) { Tneq6>
MaxHeap h=new MaxHeap(); f6_];]yP
h.init(data); Xcrk;!IB?
for(int i=0;i h.remove(); pM{nh00[
System.arraycopy(h.queue,1,data,0,data.length); Z.W66\8~}^
} bHhtd_}
V?P,&c?84
private static class MaxHeap{ ~by]xE1Eg
UOGuqV-
void init(int[] data){ <+^6}8-
this.queue=new int[data.length+1]; 1iX)d)(b
for(int i=0;i queue[++size]=data; Nru7(ag1~
fixUp(size); G0`h%
} #l4)HV
} Kx.X7R
MZpK~c1`
private int size=0; Mmo6MZ^
Q\GDrdA
private int[] queue; K,6b3kk
&K43x&mFF
public int get() { uQ=^~K:Z~
return queue[1]; )J_\tv
} 26dUA~|KJ
]J* ,g,
public void remove() { \S*$UE]uG
SortUtil.swap(queue,1,size--); ,bM-I2BR
fixDown(1); ly4s"4v
} P7 ]z
file://fixdown ?;wpd';c
private void fixDown(int k) { #Hvq/7a2R
int j; I.Y['%8,5~
while ((j = k << 1) <= size) { 1VF
if (j < size %26amp;%26amp; queue[j] j++; ],ZzI
if (queue[k]>queue[j]) file://不用交换 j,t#B"hOnp
break; CW)Z[<d8
SortUtil.swap(queue,j,k); ~%/Wupf
k = j; s-Aw<Q)d
} :LWn<,4F&
} RbGJ)K!
private void fixUp(int k) { 9prU+9
while (k > 1) { 4EXB;[]
int j = k >> 1; rUlS'L;$"
if (queue[j]>queue[k]) Cv>o.Bp|
break; iweD @b
SortUtil.swap(queue,j,k); 'S<%Xm
k = j; CvPioi
} ( 7ws{)
} ^pS+/ZSi^
!PMU O\y
} ^9_UUzf\
c(U
} [w0/\]o
@v}B6j b;
SortUtil： LuR,f"%2
)jCo%P/
package org.rut.util.algorithm; d'*]ns
TgTnqR@/
import org.rut.util.algorithm.support.BubbleSort; V $|<
import org.rut.util.algorithm.support.HeapSort; WKrX,GF
import org.rut.util.algorithm.support.ImprovedMergeSort; SVa6V}"Iv
import org.rut.util.algorithm.support.ImprovedQuickSort; FZ|CqD"#
import org.rut.util.algorithm.support.InsertSort; !@I}mQ ~
import org.rut.util.algorithm.support.MergeSort; Uu"0rUzt
import org.rut.util.algorithm.support.QuickSort; QN>7~=`
import org.rut.util.algorithm.support.SelectionSort; rVtw-[p
import org.rut.util.algorithm.support.ShellSort; @ct+7v~
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/** .c^ ggy%
* @author treeroot l;"Ab?P\
* @since 2006-2-2 *9 Q^5;y
* @version 1.0 Olfn
*/ oyk>vIZ
public class SortUtil { <e)o1+[w
public final static int INSERT = 1; a`E*\O'd
public final static int BUBBLE = 2; _Cy:]2o
public final static int SELECTION = 3; #5&jt@NS
public final static int SHELL = 4; .fzu"XAPu
public final static int QUICK = 5; cBYfXI0`
public final static int IMPROVED_QUICK = 6; Eq^uKi
public final static int MERGE = 7; v8/6wy?
public final static int IMPROVED_MERGE = 8; TwvAj#j
public final static int HEAP = 9; a=xT(G0Re
pilh@#_h
public static void sort(int[] data) { EPX8Wwf
sort(data, IMPROVED_QUICK); H@l}[hkP
} F_ 7H!F
private static String[] name={ 8ga_pNe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \OC6M` /
}; pO~c<d}b
.>Z,uT^A
private static Sort[] impl=new Sort[]{ F?u^"}%Fc
new InsertSort(), y^Vw`-e
new BubbleSort(), 1ndJ+H0H
new SelectionSort(), w%c
new ShellSort(), maSgRf[g
new QuickSort(), J^m<*
new ImprovedQuickSort(), 4'Xgk8)
new MergeSort(), C;Ic
new ImprovedMergeSort(), 7OVbP%n)d2
new HeapSort() I,ci >/+b
}; _2hXa!yO
PfG`C5 d
public static String toString(int algorithm){ ,WWj-X|+=
return name[algorithm-1]; ]lS@}W\
} Q0_>'sEM
Ybg-"w
public static void sort(int[] data, int algorithm) { yPu4T6Vv
impl[algorithm-1].sort(data); PoShQR<
} t~M $%)h
OQ4c#V?
public static interface Sort { -Dzsa
public void sort(int[] data); f+Dn9t
} .G>t72DpU
=y%rG :!
public static void swap(int[] data, int i, int j) { ] c}91
int temp = data; JmOW~W
data = data[j]; N;HIsOT}t
data[j] = temp; fT Y/4(
} !q4x~G0d
} W9J1=