[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; ,AFC1t[0
} NC[GtAPD3
int i1=l; 0YTtA]|`4
int i2=mid+1; W6!4Qyn
for(int cur=l;cur<=r;cur++){ zN8&M<mTl
if(i1==mid+1) AU${0#WV_
data[cur]=temp[i2++]; N";dG 3
else if(i2>r) 6#lC(ko'
data[cur]=temp[i1++]; 0'`8HP
else if(temp[i1] data[cur]=temp[i1++]; g}s-v?+
else UVQa af
data[cur]=temp[i2++]; 0ga1Yr]
} UHsrZgIRYT
} ]R3pBC"Jv
osgS?=8
} `!>dbR&1
7T(OV<q;#
改进后的归并排序: 4jyr\=42F'
J,77pf!B
package org.rut.util.algorithm.support; \Z7([Gh
X6"^:)&1M
import org.rut.util.algorithm.SortUtil; `__?7"p )\
6XxG1]84
/** Lb3K};SIV
* @author treeroot Xxsnpb>
* @since 2006-2-2 E[htB><
* @version 1.0 "8iyMP%8
*/ *~lgU4
public class ImprovedMergeSort implements SortUtil.Sort { "}~i7NBB
?U9d3] W
private static final int THRESHOLD = 10; i[BR(D&l_p
+hvIJv ?
/* YO!7D5rV#
* (non-Javadoc) h9OL%n 7m'
* G*wW&R)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4+?ZTc(
*/ A%czhF
public void sort(int[] data) { .0*CT:1=0
int[] temp=new int[data.length]; >7Sl( UY-
mergeSort(data,temp,0,data.length-1); :,z3:PL
} 3K20f8g
o:Os_NaD
private void mergeSort(int[] data, int[] temp, int l, int r) { $CYpO}u#
int i, j, k; elHarey`f
int mid = (l + r) / 2; O[(HE8E
if (l == r) ]ieA?:0Hi
return; sq6%=(q(?
if ((mid - l) >= THRESHOLD) m+8b2H:V
mergeSort(data, temp, l, mid); MHT,rqG
else @7Rt[2"e
insertSort(data, l, mid - l + 1); IWRq:Gw
if ((r - mid) > THRESHOLD) eYX_V6c
mergeSort(data, temp, mid + 1, r); 6UAxl3-\
else Jc#)T;#6
insertSort(data, mid + 1, r - mid); FC-*?
lXk-86[M
for (i = l; i <= mid; i++) { W;}u 2GH
temp = data; bz@=zLBt
} _(kwD^x6O{
for (j = 1; j <= r - mid; j++) { GTIfrqT
temp[r - j + 1] = data[j + mid]; Jz3<yQ-
} T]Td4T!
int a = temp[l]; $cpQ7
int b = temp[r]; |ij5c@~&
for (i = l, j = r, k = l; k <= r; k++) { f<Um2YGW
if (a < b) { D}/.;]w<[&
data[k] = temp[i++]; p1gX4t]%}a
a = temp; ]4Yb$e`
} else { e4H0<h }{
data[k] = temp[j--]; e^Wv*OD'
b = temp[j]; d*:qFq_
} f I-"8f0_
} ieLN;)Iy^
} W9m[>-Ew
N4(VRA
/** jG ;(89QR/
* @param data O|TwG:!
* @param l !J(,M)p!
* @param i G`lhvpifG
*/ mb`}sTU).
private void insertSort(int[] data, int start, int len) { 2DqHqq9m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gz5@1CF
} 4qcIoO
} 2Xs< 1rF
} ef;="N
} ]Tw6Fg1o>
[a*>@IR
堆排序： Z5a@fWU
ZUI9[A?
package org.rut.util.algorithm.support; e[&3K<
MCpK^7]k
import org.rut.util.algorithm.SortUtil; I[IQFka}
8/$iCW
/** ly5L-=Xb
* @author treeroot Ijro;rsEKM
* @since 2006-2-2 zVLi
* @version 1.0 D)cwttH
*/ ?o'arxCxZn
public class HeapSort implements SortUtil.Sort{ y'wW2U/1-
$K6`Q4`
/* (non-Javadoc) `;2`H, G'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %--5bwZi
*/ k8>^dZub
public void sort(int[] data) { 4DM|OL`w
MaxHeap h=new MaxHeap(); (uz!:dkvx
h.init(data); Px&Mi:4tG
for(int i=0;i h.remove(); iL' ]du<wk
System.arraycopy(h.queue,1,data,0,data.length); _u5U> w
} dg8\(G
/`@>v$oo
private static class MaxHeap{ r_RTtS#
wIHz TL
void init(int[] data){ 6{WT;W>WT:
this.queue=new int[data.length+1]; [+7X&B
for(int i=0;i queue[++size]=data; &}=,8Gt1G
fixUp(size); ~ZN9 E-uL
} ]>T/Gl1
} y^BM*CI
!qve1H4d2
private int size=0; YWF<2l.
BEx^IQ2
private int[] queue; 9DE)5/c`v
3_/d=ZI\
public int get() { >;?97'M
return queue[1]; -e\56%\~_
} ?C\9lLX
Nuq/_x
public void remove() { KphEw[4/
SortUtil.swap(queue,1,size--); JwVv+9hh
fixDown(1); /omVMu
} AOUO',v
file://fixdown _zwuK1e
private void fixDown(int k) { >@iV!!
int j; ?!Gt. fb
while ((j = k << 1) <= size) { cXH?'q'vZ
if (j < size %26amp;%26amp; queue[j] j++; nJC}wh2d#
if (queue[k]>queue[j]) file://不用交换 z8MYgn7
break; /% 1lJD
SortUtil.swap(queue,j,k); KguFU
k = j; Q)&Ztw<
} Vtri"G8 aB
} _;W|iUreb
private void fixUp(int k) { '5\1uB PKW
while (k > 1) { R5zV=N
int j = k >> 1; [%:NR
if (queue[j]>queue[k]) :wm^04<i
break; uM#/
SortUtil.swap(queue,j,k); dI|/Xm>
k = j; +^:K#S9U
} eyV904<F
} ^;bkU|(`6
)=@ XF0
} !2}Q9a
TmiQq'm[b
} /2 N%Z
?9A[;j|a0
SortUtil： m\=u/Zip
_i#Z'4?2E
package org.rut.util.algorithm; _u; UU$~
2BY:qz%:
import org.rut.util.algorithm.support.BubbleSort; k@'.d)y0`
import org.rut.util.algorithm.support.HeapSort; Ygb#U'|
import org.rut.util.algorithm.support.ImprovedMergeSort; l?~h_8&fT
import org.rut.util.algorithm.support.ImprovedQuickSort; EzaOg|
import org.rut.util.algorithm.support.InsertSort; {[+gM?
import org.rut.util.algorithm.support.MergeSort; q[lqEc
import org.rut.util.algorithm.support.QuickSort; I(4k{=\ph]
import org.rut.util.algorithm.support.SelectionSort; P.0-(
import org.rut.util.algorithm.support.ShellSort; xAflcY>Ozs
;z#9>99rH
/** [A47OR
* @author treeroot [#tW$^UD
* @since 2006-2-2 (ym)q#^
* @version 1.0 Df9}YI;?
*/ (@Bm2gH
public class SortUtil { <Jx{Uv
public final static int INSERT = 1; ia[wVxd
public final static int BUBBLE = 2; x$E l7=.
public final static int SELECTION = 3; t +_G%tv
public final static int SHELL = 4; \?ZdUY
public final static int QUICK = 5; gqhW.e}]
public final static int IMPROVED_QUICK = 6; 7>'F=}6[Y
public final static int MERGE = 7; tj0vB]c
public final static int IMPROVED_MERGE = 8; }|d:(*
public final static int HEAP = 9; V-31x)
':=C2x1d|
public static void sort(int[] data) { T-\,r
sort(data, IMPROVED_QUICK); IO4 IaeM
} `#V"@Go
private static String[] name={ #3S/TBy,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *=8)]_=f
}; }y1M0^M-$
>Et?7@
private static Sort[] impl=new Sort[]{ ) E\pQ5&
new InsertSort(), ATU@5,9
new BubbleSort(), UpITx]y?"m
new SelectionSort(), ;dnn 2)m
new ShellSort(), ;WhB2/5v
new QuickSort(), nF-FoO98
new ImprovedQuickSort(), =P!Vi6[gF~
new MergeSort(), CY:pYke=
new ImprovedMergeSort(), La!PGZ{
new HeapSort() M$)+Uo2
}; QqDF_
ps]6,@uyB
public static String toString(int algorithm){ ;KhYh S(q
return name[algorithm-1]; g^idS:GtX5
} mH?hzxa+
GHkSU;})
public static void sort(int[] data, int algorithm) { %/s1ma6q
impl[algorithm-1].sort(data); }XUHP%
} ..!yf e"5
%F7aFvl*
public static interface Sort { XEuv aM
public void sort(int[] data); IH0Uq_
} 0K!9MDT}*
#wo_
public static void swap(int[] data, int i, int j) { |LQmdgVr$
int temp = data; YcI]_[
data = data[j]; D"hiEz
data[j] = temp; A-~)7-
} ,R)[$n
} F,D&