[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; !C3MFm{B
} |es?;s'
int i1=l; PuA9X[=
int i2=mid+1; D"2&P^-
for(int cur=l;cur<=r;cur++){ BMG3|N^
if(i1==mid+1) xg;+<iW
data[cur]=temp[i2++]; YSic-6z0Ms
else if(i2>r) lJ}_G>GJ
data[cur]=temp[i1++]; gv-xm
else if(temp[i1] data[cur]=temp[i1++]; %4,O 2\0?&
else pm 9"4z
data[cur]=temp[i2++]; YA_c N5p/@
} IID-k
} v,-HU&/*B
RL@VSHXc
} i%#+\F.&
[ 0KlC1=
改进后的归并排序: UU;(rS/
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package org.rut.util.algorithm.support; 7WkB>cn
8"2=U6*C
import org.rut.util.algorithm.SortUtil; Mb|a+,:>3
9.gXzPH
/** -$cmG4
* @author treeroot =JK@z
* @since 2006-2-2 g9}DnCT*.
* @version 1.0 8QLj["
*/ pz\ +U7
public class ImprovedMergeSort implements SortUtil.Sort { Bn#?zI
j7$e28|_n
private static final int THRESHOLD = 10; Oj3.q#)`Z
{GK;63`1
/* j<VFn~*_
* (non-Javadoc) aW)-?(6>
* hIs4@0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -.u]GeMy
*/ :t8b39
public void sort(int[] data) { 8*#R]9
int[] temp=new int[data.length]; s%nUaWp~
mergeSort(data,temp,0,data.length-1); %et }A93
} .oYl-.E>&
dJeNbVd
private void mergeSort(int[] data, int[] temp, int l, int r) { ~J wb`g.
int i, j, k; RKHyw08
int mid = (l + r) / 2; (2J: #
if (l == r) c'>/
return; f_jo+z{-ik
if ((mid - l) >= THRESHOLD) PV'x+bN5
mergeSort(data, temp, l, mid); |:nOp(A\*
else m? J0i>H
insertSort(data, l, mid - l + 1); 4o <Uy
if ((r - mid) > THRESHOLD) u~7hWiY<2
mergeSort(data, temp, mid + 1, r); H]{v;;'~
else C*)3e*T*
insertSort(data, mid + 1, r - mid); GP!?^r:en
^84G%)`&
for (i = l; i <= mid; i++) { rb5~XnJk
temp = data; \o}xF@sM5
} , pDnRRJ!
for (j = 1; j <= r - mid; j++) { %p^wZtm
temp[r - j + 1] = data[j + mid]; 8=B|C'>
} M -cTRd-i
int a = temp[l]; `w#Oih!6A|
int b = temp[r]; v5!d$Vctu
for (i = l, j = r, k = l; k <= r; k++) { 2&:f&"
if (a < b) { 0=@?ob7
data[k] = temp[i++]; =9y[1t
a = temp; ?26I,:;
} else { A!s`[2 Z
data[k] = temp[j--]; jSh5!6O
b = temp[j]; ddJQC|xR}
} "bFTk/
} &gVN&
} r?+%?$
H*RC@O_hv
/** 0%9 q8M;
* @param data zT=Ho
* @param l j"ThEx0
* @param i Y;dz,}re
*/ Bn=by{i
private void insertSort(int[] data, int start, int len) { f2Klt6"9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mXRB7k
} }iXDa?6%
} \\r)Ue]
} 2Nu=/tMN
} "Gfh,e
q+H%)kF
堆排序： 1L%CJ+Q#0i
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package org.rut.util.algorithm.support; #a/5SZP Z\
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import org.rut.util.algorithm.SortUtil; I WTwz!+
lGV0*Cji
/** q.KG^=10
* @author treeroot @K\~O__
* @since 2006-2-2 m!|kW{B#A
* @version 1.0 /7aBDc-v
*/ =e/9&993
public class HeapSort implements SortUtil.Sort{ -V-RP;">
j`JMeCG=Ee
/* (non-Javadoc) V, Z|tB^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s1MErd
*/ ,~aQL
public void sort(int[] data) { [;r)9mh7
MaxHeap h=new MaxHeap(); 1t:Q_j0Ym
h.init(data); WKts[Z
for(int i=0;i h.remove(); bZnuNYty75
System.arraycopy(h.queue,1,data,0,data.length); e}D3d=6`
} S@jQX
qW$<U3u}
private static class MaxHeap{ <6EeD5{*
:By?O"LQ
void init(int[] data){ L6t+zIUc-~
this.queue=new int[data.length+1]; R+2+-j4
for(int i=0;i queue[++size]=data; y~Bh
fixUp(size); n&{Dq}q
} #zG&|<hc
} 6.CbAi3Z
gQo]
private int size=0; )#BMTKA^
&v$rn#l
private int[] queue; TC@s
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public int get() { ]9YJ,d@J
return queue[1]; $yn];0$J
} )<oJnxe]
J ][T"K
public void remove() { q-
SortUtil.swap(queue,1,size--); W^0w
fixDown(1); jlkmLcpf
} G<At_YS
file://fixdown 0C =3dnp6
private void fixDown(int k) { H35S#+KX
int j; J}htu
while ((j = k << 1) <= size) { 3/aMJR:o
if (j < size %26amp;%26amp; queue[j] j++; x*![fK
if (queue[k]>queue[j]) file://不用交换 B( ]M&
break; i'a?kSy
SortUtil.swap(queue,j,k); .\[`B.Q
k = j; @XgKYm
} w zYzug
} K0H'4' I
private void fixUp(int k) { Of-Rx/
while (k > 1) { p6]7&{>
int j = k >> 1; xO$lsZPG
if (queue[j]>queue[k]) $:cE ^8K
break; 9*2[B"5
SortUtil.swap(queue,j,k); C\3y {s
k = j; ~8~aJ^[
} 1_o],?Q
} fRrvNj0{V
w:%o?pKet1
} hXfQ)$J
H(R1o~
} V[{6e
CpA|4'#
SortUtil： qS403+Su1=
dq7x3v^"ZG
package org.rut.util.algorithm; yL%K4$z
y-T| #
import org.rut.util.algorithm.support.BubbleSort; ^M3~^lV
import org.rut.util.algorithm.support.HeapSort; )`SES."
import org.rut.util.algorithm.support.ImprovedMergeSort; !Nu<xq@!
import org.rut.util.algorithm.support.ImprovedQuickSort; ?p9VO.^5
import org.rut.util.algorithm.support.InsertSort; {!.(7wV\
import org.rut.util.algorithm.support.MergeSort; VO,!x~S!
import org.rut.util.algorithm.support.QuickSort; RS"H8P4W
import org.rut.util.algorithm.support.SelectionSort; e>7]w,*|
import org.rut.util.algorithm.support.ShellSort; u}>#Eb
)'Oh`$M
/** $56Z#'(D
* @author treeroot V_C-P[2~
* @since 2006-2-2 O!zV)^r
* @version 1.0 B\<Q ;RI2;
*/ Ao&\EcIOT
public class SortUtil { G'rxXJq
public final static int INSERT = 1; IC#>X5
public final static int BUBBLE = 2; IM:=@a{
public final static int SELECTION = 3; |M>eEE*F<
public final static int SHELL = 4; 6BY-^"W5`
public final static int QUICK = 5; !(mjyr
public final static int IMPROVED_QUICK = 6; K\>tA)IPSV
public final static int MERGE = 7; kd=GCO
public final static int IMPROVED_MERGE = 8; __`*dL>*
public final static int HEAP = 9; +J_c'ChN
)!Jc3%(B
public static void sort(int[] data) { 3,>0a
sort(data, IMPROVED_QUICK); pwO>h>ik
} CEXyrs<
private static String[] name={ 3b*cU}go
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &Flglj~7l
}; dI*pDDq#
t2EHrji~
private static Sort[] impl=new Sort[]{ d{rQzia"mV
new InsertSort(), A3rPt&<a
new BubbleSort(), IN4=YrM^
new SelectionSort(), s4G|_==
new ShellSort(), A:>01ZJ5S+
new QuickSort(), ~1cnE:x;V
new ImprovedQuickSort(), $@sEn4h
new MergeSort(), bsuus R9W
new ImprovedMergeSort(), UQ8M~x5$3%
new HeapSort() `kOD[*
}; y]2qd35u_A
D5$wTI
public static String toString(int algorithm){ Q<z_/j9
return name[algorithm-1]; 5 elw~u
} E_Im^a
U3 */v4/
public static void sort(int[] data, int algorithm) { @*}D$}aR'V
impl[algorithm-1].sort(data); -c(F1l
} wDcj,:h`
vK 7^*qr;j
public static interface Sort { HqI t74+
public void sort(int[] data); $>*3/H
} _Bj)r}~7#
`o<' x.I
public static void swap(int[] data, int i, int j) { =2[7 E
int temp = data; EzDk}uKY0R
data = data[j]; )_1zRT|9
data[j] = temp; =2Bg9!zW>
} JQ}$Aqk
} dODt(J}%