[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; hXBqz9
} Zm5nLxM
int i1=l; ]#+5)[N$>
int i2=mid+1; ir"* iL=
for(int cur=l;cur<=r;cur++){ =I{S;md
if(i1==mid+1) uJ7,rq
data[cur]=temp[i2++]; W|FNDP0
else if(i2>r) ud!r*E
data[cur]=temp[i1++]; UfO'.8*v
else if(temp[i1] data[cur]=temp[i1++]; WoJ]@Me8
else kv[OW"8t
data[cur]=temp[i2++]; ) +*@AME
} 8g&uE*7N
} ~V|KT}H
_GRv
} 7?*~oVZW
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改进后的归并排序: r]xdhR5
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package org.rut.util.algorithm.support; _6| /P7"
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import org.rut.util.algorithm.SortUtil; :s? y,
pZW}^kg=
/** o(vZ*^\
* @author treeroot X/K| WOO6
* @since 2006-2-2 -_:JQ
* @version 1.0 (d1V1t2r6
*/ 5Xla_@WLW
public class ImprovedMergeSort implements SortUtil.Sort { oM m/!Dc
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private static final int THRESHOLD = 10; Ebmqq#SHjX
}P7xdQ6
/* +*]SP@|IYI
* (non-Javadoc) t"4Rn<-
* 8'>.#vyMGv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xy2eJJq
*/ u_$6LEp-
public void sort(int[] data) { t%ou1&SO
int[] temp=new int[data.length]; tVK?VNW
mergeSort(data,temp,0,data.length-1); !hpTyO+%
} *T1L)Cp
$H %+k?
private void mergeSort(int[] data, int[] temp, int l, int r) { Au%Wrk3j
int i, j, k; L|vaTidc0
int mid = (l + r) / 2; 6oe$)iV
if (l == r) ~W5>;6f\
return; m|g$'vjk
if ((mid - l) >= THRESHOLD) %DHP
mergeSort(data, temp, l, mid); $Ykp8u,(
else 4p0IBfVG
insertSort(data, l, mid - l + 1); xX[{E x
if ((r - mid) > THRESHOLD) +K @J*W 1
mergeSort(data, temp, mid + 1, r); E}E7VQjM
else b3jU~L$
insertSort(data, mid + 1, r - mid); }6b7a1p
5[0l08'D
for (i = l; i <= mid; i++) { `3H?*\<(
temp = data; *&~sr
} Bil;@,Z#
for (j = 1; j <= r - mid; j++) { M]pel\{M
temp[r - j + 1] = data[j + mid]; X,Q6
} |ijW_r
int a = temp[l]; _r^G%Mvy|
int b = temp[r]; ]ys4
for (i = l, j = r, k = l; k <= r; k++) { RJ7/I/yD|
if (a < b) { rmAP&Gw I
data[k] = temp[i++]; F\YcSDM
a = temp; cPa 0n4
} else { yBD.Cs@
data[k] = temp[j--]; ?`BED6$`G9
b = temp[j]; Yn?2,^?N
} *+zy\AhkP
} @/Wty@PU
} -6*OF.Ag`
8M5!5Jzv
/** U(=f5|-
* @param data (&a3v
* @param l \5v=pDd4g
* @param i cfQh
*/ }r\SP3
private void insertSort(int[] data, int start, int len) { ,T1XX2?:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ) J:'5hz
} Uzm[e%/`
} EUYa =-
} lFzQG:k@
} 3IRRFIiO
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堆排序： B "s8i{Vm
@[Jt~v
package org.rut.util.algorithm.support; u"CIPc{Sr
4YB7og%P
import org.rut.util.algorithm.SortUtil; 2TevdyI
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/** U3dR[*
* @author treeroot ^FyvaO
* @since 2006-2-2 R*c0NJF
* @version 1.0 IQIb\OUo!v
*/ :pV("tHE
public class HeapSort implements SortUtil.Sort{ PK|`}z9
PxCl]~v
/* (non-Javadoc) M,v@G$pW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VNh,pQ(
*/ [F9KC^%S
public void sort(int[] data) { N!4xP.Ps
MaxHeap h=new MaxHeap(); iTtAj~dfZ
h.init(data); Aj)<8
for(int i=0;i h.remove(); }Rf:DmPE
System.arraycopy(h.queue,1,data,0,data.length); O7#}8-@}<u
} bQnwi?2
th>yi)m
private static class MaxHeap{ ;V}FbWz^v6
IbNTdg]/F`
void init(int[] data){ ,:Ix s^-
this.queue=new int[data.length+1]; Cg%I)nz
for(int i=0;i queue[++size]=data; PtVNG
fixUp(size); t+TbCe
} &#EVE xL
} @8 yE(
r~BQy'
private int size=0; a[{QlD^D
7>e~i,
private int[] queue; Y=wP3q
@_weMz8}
public int get() { yK2*~T,6@
return queue[1]; 7{/:,
} rF j)5~
'<E8<bi
public void remove() { 4 d1Y\
SortUtil.swap(queue,1,size--); F|ML$
fixDown(1); S:GUR6g8D
} do?n /<@o
file://fixdown R?e7#HsJ
private void fixDown(int k) { cB"F1~z
int j; HjY-b*B
while ((j = k << 1) <= size) { :+V1682u
if (j < size %26amp;%26amp; queue[j] j++; b-=[(]_$h
if (queue[k]>queue[j]) file://不用交换 0 VgnN
break; jKi*3-&
SortUtil.swap(queue,j,k); T4, Zc
k = j; ,IvnNnl2
} B7jlJqV
} |&pz,"(
private void fixUp(int k) { QbKYB
while (k > 1) { aw@Aoq
int j = k >> 1; 'krMVC-
if (queue[j]>queue[k]) an5kR_=
break; nQYS{`hk
SortUtil.swap(queue,j,k); v'~nABYH
k = j; a0j.\g
} dfkTDG+
} #dm@%~B{.
+(k)1kCMn
} q,>F#A'
WD do{
} 7JwWM2N?V
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SortUtil： <TROs!x$a
WBIB'2:m
package org.rut.util.algorithm; Xm[r#IA
f*&JfP
import org.rut.util.algorithm.support.BubbleSort; GB0b|9(6D"
import org.rut.util.algorithm.support.HeapSort; >^ 1S26
import org.rut.util.algorithm.support.ImprovedMergeSort; KI QBY!N+
import org.rut.util.algorithm.support.ImprovedQuickSort; e/#&5ISk
import org.rut.util.algorithm.support.InsertSort; ?GfA;O
import org.rut.util.algorithm.support.MergeSort; (pK4i5lT
import org.rut.util.algorithm.support.QuickSort; ?m7"G)
import org.rut.util.algorithm.support.SelectionSort; FG36,6N%2j
import org.rut.util.algorithm.support.ShellSort; xla^A}{
9}Ave:X^
/** {3uSg)
* @author treeroot Wjk;"_"gd
* @since 2006-2-2 !P^$g R
* @version 1.0 1? hd
*/ qJzK8eW
public class SortUtil { v})Ti190
public final static int INSERT = 1; -&$%m)wN
public final static int BUBBLE = 2; R;,HtN
public final static int SELECTION = 3; K?m:.ZM
public final static int SHELL = 4; kb\v}gfiD/
public final static int QUICK = 5; |.8=gS5
public final static int IMPROVED_QUICK = 6; KKXb,/
public final static int MERGE = 7; U8Jj(]},_
public final static int IMPROVED_MERGE = 8; !Jp.3,\?~
public final static int HEAP = 9; #UN{ J6{
2EcYO$R!
public static void sort(int[] data) { +VCo=oA
sort(data, IMPROVED_QUICK); D>^ix[:J
} Sqt"G6<
private static String[] name={ 3E@&wpj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3Qr!?=nf
}; &rWJg6/
)g<qEyJR
private static Sort[] impl=new Sort[]{ *B}R4Y|g
new InsertSort(), SF=|++b1f
new BubbleSort(), Y6DiISl
new SelectionSort(), 9)hC,)5
new ShellSort(), * rANf&y
new QuickSort(), LVtQ^ 5>8
new ImprovedQuickSort(), o%4+I>
new MergeSort(), ul&7hHp_u%
new ImprovedMergeSort(), ?6]ZQ\,
new HeapSort() |OT%,QT|
}; ;mxT>|z
`IQC\DSl/
public static String toString(int algorithm){ Vta;ibdeqW
return name[algorithm-1]; 5DUPsV
} df rr.i
({b/J0<@D
public static void sort(int[] data, int algorithm) { rz7b%WY
impl[algorithm-1].sort(data); 1T?%i
} Wfw9cxGkf
}X:r:{r
public static interface Sort { phSP+/w
public void sort(int[] data); _)" 5 gv
} 4/vQ=t
bxHk0w
public static void swap(int[] data, int i, int j) { <Y6>L};
int temp = data; \Rt
data = data[j]; 41D[[Gh
data[j] = temp; nu-wQr
} HJrg
} ]g!<5w