[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; ARYqX\-e
} 41%B%K*
int i1=l; ^n5[pF}Gw
int i2=mid+1; 2Up1 FFRx
for(int cur=l;cur<=r;cur++){ $rf4h]&<
if(i1==mid+1) dbGW`_zQ4
data[cur]=temp[i2++]; ]E90q/s@c
else if(i2>r) 84[T!cDk
data[cur]=temp[i1++]; T2# W=P
else if(temp[i1] data[cur]=temp[i1++]; %-@`|
else (j-[m\wF
data[cur]=temp[i2++]; L{$ZL&
} >b;fhdd:4
} gBRhO^Sz
)f4D2c&VE
} {N+N4*
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改进后的归并排序: Yo:l@(
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package org.rut.util.algorithm.support; -A}*Aa'\
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import org.rut.util.algorithm.SortUtil; y|!%C-P
d>:(>@wz
/** &F"Mkyf
* @author treeroot Y>-|`2Z
* @since 2006-2-2 po_||NIY
* @version 1.0 4%O*2JAw
*/ 0 1[LPN
public class ImprovedMergeSort implements SortUtil.Sort { _xign 3
&)L2a)
private static final int THRESHOLD = 10; s)%RmsdL
07-S%L7Z
/* <^VZ4$j
* (non-Javadoc) HBYqqEO
* "HFS5Bj'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +M%i3A
*/ -!(
public void sort(int[] data) { *W q{ :k
int[] temp=new int[data.length]; S1^u/$*6
mergeSort(data,temp,0,data.length-1); XtfO;`
} 9&5\L
@YmD 79
private void mergeSort(int[] data, int[] temp, int l, int r) { We3*WsX\
int i, j, k; GqhnE>
int mid = (l + r) / 2; Nd/iMV6V;
if (l == r) ?iG}Qj@5
return; SV.\B
if ((mid - l) >= THRESHOLD) POTW+Zq]
mergeSort(data, temp, l, mid); haW8zb0z
else :qy`!QPUm
insertSort(data, l, mid - l + 1); }gL9G
if ((r - mid) > THRESHOLD) l5S(xQ
mergeSort(data, temp, mid + 1, r); UwY<3ul
else 'X{cDdS^
insertSort(data, mid + 1, r - mid); +uW$/_Y$
N)A?*s'v~
for (i = l; i <= mid; i++) { qWe1`.o
temp = data; CtVY;eG
} o9M[Zr1@k
for (j = 1; j <= r - mid; j++) { ''!pvxA
temp[r - j + 1] = data[j + mid]; VP=(",`
} 48M)A
int a = temp[l]; xI'<4lo7Z
int b = temp[r]; \/4ipU.
for (i = l, j = r, k = l; k <= r; k++) { w\=zTHo88
if (a < b) { ;nG"y:qq
data[k] = temp[i++]; ]@1YgV
a = temp; XhFa9RC
} else { ke|v|@
data[k] = temp[j--]; (5{|']G
b = temp[j]; IjN3 jU
} ';??0M
} 1Nx.aji
} vTjgW?9
R|H9AM ~E
/** <5/r
* @param data m}0US;c#f
* @param l OlhfBu)~
* @param i PRl\W:_t
*/ ed*Cx~rT
private void insertSort(int[] data, int start, int len) { joDnjz=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6cSMKbgZJ
} zfL$z,zgf
} b].:2
} H[V^wyi'z
} hNc;,13
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堆排序： ?ECmPS1
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package org.rut.util.algorithm.support; ,5'LbO-
oM-{)rvQd
import org.rut.util.algorithm.SortUtil; &/R@cS6}'
C.s{&
/** @/yRE^c
* @author treeroot lDV8<
* @since 2006-2-2 [6BLC{2
* @version 1.0 ;6t>!2I>C
*/ PC/fb-J
public class HeapSort implements SortUtil.Sort{ KgVit+4u/
GmtMA|
/* (non-Javadoc) 2.}<VivT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `3kE$h#
*/ Y\BB;"x1
public void sort(int[] data) { 'T7JXV5
MaxHeap h=new MaxHeap(); RGhl`;
h.init(data); m\7-/e2a
for(int i=0;i h.remove(); #h ;j2
System.arraycopy(h.queue,1,data,0,data.length); WM: ~P$%cx
} 28SlFu?
F/ 2@%,2n
private static class MaxHeap{ hSaS2RLF
9:A>a3KOH
void init(int[] data){ '*!R gbj;
this.queue=new int[data.length+1]; I!jSAc{
for(int i=0;i queue[++size]=data; M! gX4
fixUp(size); mc|T}B
} x+|Fw d
} '0X!_w6W
Ql%7wrK
private int size=0; F^_d8=67h
/V~L:0%
private int[] queue; P~_CDh.N
H#k"[eZ
public int get() { 9 f-T>}
return queue[1]; swG^L$r`
} x`PIJE
J[YA1
public void remove() { v6oPAqj,r
SortUtil.swap(queue,1,size--); CB_(9T72H
fixDown(1); :tdx:
} VbM5]UT/
file://fixdown /}2 bsiJT
private void fixDown(int k) { >?'q P ]
int j; zJI/j _~W
while ((j = k << 1) <= size) { ,.]e~O4R
if (j < size %26amp;%26amp; queue[j] j++; Y:^ =jV7
if (queue[k]>queue[j]) file://不用交换 !W^2?pqN
break; X~0l1 @!
SortUtil.swap(queue,j,k); kR^7Z7+#*
k = j; Y@KZ:0<
} nX5*pTfjL3
} &Xe r#6~
private void fixUp(int k) { jCW>=1:JGY
while (k > 1) { (&PamsV*8
int j = k >> 1; 'nP'MA9b;a
if (queue[j]>queue[k]) ^K@r!)We
break; vbqI$F[s
SortUtil.swap(queue,j,k); w?C_LP
k = j; )g:UH Ns
} -c<<A.X
} @M#2T
D> Z>4:EM
} Q+mMpI
ZyCAl9{p
} ;07!^#:L=Q
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SortUtil： au"HIyi?k
P:lvZ
package org.rut.util.algorithm; kSU5 }
KrMIJA4>
import org.rut.util.algorithm.support.BubbleSort; dwrc"GK!o
import org.rut.util.algorithm.support.HeapSort; )FWF T:P~
import org.rut.util.algorithm.support.ImprovedMergeSort; Cb=r8C
import org.rut.util.algorithm.support.ImprovedQuickSort; oge^2
import org.rut.util.algorithm.support.InsertSort; Ep5lmzg
import org.rut.util.algorithm.support.MergeSort; vlyq2>TfR
import org.rut.util.algorithm.support.QuickSort; (n" )
import org.rut.util.algorithm.support.SelectionSort; P7egT,Z
import org.rut.util.algorithm.support.ShellSort; n,PHfydqX
:m#vvH
/** MFW?m,It)
* @author treeroot E>4#j PK
* @since 2006-2-2 ~pzaX8!
* @version 1.0 n/$BdFH
*/ C^nL{ZP,
public class SortUtil { v^@L?{"}8
public final static int INSERT = 1; y{u6t 3
public final static int BUBBLE = 2; YD.3FTNGC
public final static int SELECTION = 3; |\QR9>
public final static int SHELL = 4; O b8[P=
public final static int QUICK = 5; f@LUp^Z/v
public final static int IMPROVED_QUICK = 6; wB9IP{Pf
public final static int MERGE = 7; L%B+V;<h3
public final static int IMPROVED_MERGE = 8; =v:_N.Fh-c
public final static int HEAP = 9; '0t j2
ATnD~iACY
public static void sort(int[] data) { 6\5U%~78
sort(data, IMPROVED_QUICK); >7;JZuVo
} w-B\AK?}
private static String[] name={ Lj~lfO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .&sguAyG
}; E*(Q'p9C
GGJ_,S*
private static Sort[] impl=new Sort[]{ K"}Dbr
new InsertSort(), \W=
new BubbleSort(), GK&yP%Z3
new SelectionSort(), So`xd *C!
new ShellSort(), +D h=D*
new QuickSort(), I]k'0LG*^
new ImprovedQuickSort(), {_q2kk
new MergeSort(), 46XB6z01
new ImprovedMergeSort(), N23s{S t
new HeapSort() }rO4b>J
}; XX6&%7(
7PQedZ<\
public static String toString(int algorithm){ @=;6:akz`
return name[algorithm-1]; 2Cr+Z(f
} W!X#:UM)
cU{LyZp
public static void sort(int[] data, int algorithm) { +Og O<P
impl[algorithm-1].sort(data); 20fCWVw}?}
} {;p/V\
8ZIv:nO$
public static interface Sort { iGhapD
public void sort(int[] data); M2s
} qh2.N}lW
|HG%o 3E]
public static void swap(int[] data, int i, int j) { qS2%U?S7
int temp = data; ux=a9
data = data[j]; yBl<E$=
data[j] = temp; 8vT:icl
} I7uYsjh@u
} }s)Z:6;(,q