[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; wTR?8$
} jCtk3No
int i1=l; 2P`./1L
int i2=mid+1; ,#;`f=aqTG
for(int cur=l;cur<=r;cur++){ oF+yh!~mM
if(i1==mid+1) `%#_y67v
data[cur]=temp[i2++]; KLG.?`h:
else if(i2>r) r8*xp\/
data[cur]=temp[i1++]; !WGQ34R{
else if(temp[i1] data[cur]=temp[i1++]; .j,xh )v"
else fk?!0M6d
data[cur]=temp[i2++]; X1}M_h%
} tAep_GR
} T>1#SWQ/9
@V^.eVM\R
} 3j$,L(
hmLI9TUe6
改进后的归并排序: ,3}+t6O"
a9^})By&
package org.rut.util.algorithm.support; Jn|<G
tGl|/
import org.rut.util.algorithm.SortUtil; v_%6Ly
("}Hs[
/** 8'3&z-
* @author treeroot u&o4?]6
* @since 2006-2-2 4%qmwt*p
* @version 1.0 X1oR
*/ ?RG;q
public class ImprovedMergeSort implements SortUtil.Sort { nSSJl
HES$.a
private static final int THRESHOLD = 10; B/lIn'=
@%u}|iF|
/* ?uTuO
* (non-Javadoc) ph(LsPT-
* !E00I0W-h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) />9`Mbg[G
*/ ]P7gEBi
public void sort(int[] data) { 5lzbg
int[] temp=new int[data.length]; B3[X{n$px
mergeSort(data,temp,0,data.length-1); B$s6|~
} a}VR>!b
8,+T[S
private void mergeSort(int[] data, int[] temp, int l, int r) { buzpmRoN)
int i, j, k; 'CqAjlj
int mid = (l + r) / 2; k)F!gV#
if (l == r) <T.R%Jys
return; <)O#Y76s
if ((mid - l) >= THRESHOLD) q\!"FDOl4
mergeSort(data, temp, l, mid); n@bkZ/G
else +J|LfXgB
insertSort(data, l, mid - l + 1); 5"U5^6:T
if ((r - mid) > THRESHOLD) /M]P&Zb |
mergeSort(data, temp, mid + 1, r); {*CG&-k2D
else BBX/&d8n
insertSort(data, mid + 1, r - mid); suhnA(T{
.':17 $c`H
for (i = l; i <= mid; i++) { c"`HKfL
temp = data; RmKbnS$*q
} ~PF,[$?4n
for (j = 1; j <= r - mid; j++) { dE[X6$H[
temp[r - j + 1] = data[j + mid]; >yVrIko
} ^56D)A=
int a = temp[l]; 3#udzC
int b = temp[r]; d1^5r 31
for (i = l, j = r, k = l; k <= r; k++) { ^"/TWl>jB
if (a < b) { *CF80DJ
data[k] = temp[i++]; ;VCFDE{K=
a = temp; F [-D +Nka
} else { O7Jp;
data[k] = temp[j--]; =r`E%P:
b = temp[j]; Eqny'44
} 4TU\SP8sM
} ?_S);
} {ByKTx&
#|:q"l9
/** A~?)g!tS<
* @param data ,T 3M
* @param l FRPdfo37
* @param i BUh(pS:
*/ 1,Pg^Xu
private void insertSort(int[] data, int start, int len) { "GqasbX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *E|3Vy{4
} :N<o<qn
} =-P<v2|e
} ~$ ?85
} <Z~Nz>'r
9*n?V;E
堆排序： j9Z1=z
,FRa6;
package org.rut.util.algorithm.support; XNvlx4
K;\fJ2ag
import org.rut.util.algorithm.SortUtil; 1Nv qtVC
<Fl.W}?Q}
/** B~<bc
* @author treeroot y?}<SnjP:
* @since 2006-2-2 a)+*Gf7?
* @version 1.0 +]H!q W:
*/ 0H'G./8
public class HeapSort implements SortUtil.Sort{ !14v Ovj4{
V5jy,Qi)
/* (non-Javadoc) b|k(:b-G&.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a[!:`o1U
*/ 11A;z[Zk
public void sort(int[] data) { g6SZ4WV
MaxHeap h=new MaxHeap(); /b4>0DXT5
h.init(data); -"Nvu
for(int i=0;i h.remove(); X1u\si%.4S
System.arraycopy(h.queue,1,data,0,data.length); &,/-<y-S
} h2+"e# _
H}usL)0&&
private static class MaxHeap{ ,MLAW
6TQ[2%X'
void init(int[] data){ vsq |m5
this.queue=new int[data.length+1]; [NGq$5
for(int i=0;i queue[++size]=data; 4*q6#=G
fixUp(size); VjiwW%UOM
} d.U"lP/)D
} RM25]hx
9I1i(0q
private int size=0; <{eJbNp
%wJ>V-\e
private int[] queue; _(@Vf=t
ZU7u>
public int get() { g</Mk^CE
return queue[1]; <@n3vO6
} ronZa0
E.x<J.[Y
public void remove() { `P;3,@ e
SortUtil.swap(queue,1,size--); =$kSn\L,
fixDown(1); ~>%%kQt
} ZtI@$ An
file://fixdown VW] ,R1q
private void fixDown(int k) { 7<5=fYbr
int j; &_]bzTok
while ((j = k << 1) <= size) { 8feLhWg'P
if (j < size %26amp;%26amp; queue[j] j++; N;cSR\Ng
if (queue[k]>queue[j]) file://不用交换 9J}^{AA
break; E,A9+OKxJ
SortUtil.swap(queue,j,k); immf\
k = j; 8tT/w5
} _tnoq;X[
} catJC3
private void fixUp(int k) { ]6WP;.[
while (k > 1) { |5BvVqn
int j = k >> 1; 2d OUY $4
if (queue[j]>queue[k]) wFL7JwK:G
break; ]#FQde4]5
SortUtil.swap(queue,j,k); s*e1m%
k = j; ;l@Ge`&u
} <+<,$jGC-
} v +?'/Q%
gp^xl>E
} )Y=ti~?M(
}A<fCm7
} ~y:?w(GD
1=jwJv.^/
SortUtil： #]wBXzu?
~#P` 7G
package org.rut.util.algorithm; cMAY8$
=A/$[POr
import org.rut.util.algorithm.support.BubbleSort; MnW"ksH
import org.rut.util.algorithm.support.HeapSort; ;'4Kg@/
import org.rut.util.algorithm.support.ImprovedMergeSort; 6.3qux9
import org.rut.util.algorithm.support.ImprovedQuickSort; #4& <d.aw'
import org.rut.util.algorithm.support.InsertSort; -D_xA10
import org.rut.util.algorithm.support.MergeSort; @l~MY*hp
import org.rut.util.algorithm.support.QuickSort; /8>we`4
import org.rut.util.algorithm.support.SelectionSort; P#2#i]-
import org.rut.util.algorithm.support.ShellSort; )5s-"o<
T FK#ign
/** U]iZ3^8VT
* @author treeroot JZ"XrS0?
* @since 2006-2-2 4m_CPe
* @version 1.0 DV~g
*/ K=J">^uW
public class SortUtil { 3TT?GgQ
public final static int INSERT = 1; fjy2\J!
public final static int BUBBLE = 2; \'P79=AU
public final static int SELECTION = 3; u< 5{H='6
public final static int SHELL = 4; l`EKL2n
public final static int QUICK = 5; n!?u/[@
public final static int IMPROVED_QUICK = 6; aN"dk-eK
public final static int MERGE = 7; )m10IyUAY
public final static int IMPROVED_MERGE = 8; ,@@FAL
public final static int HEAP = 9; %uy?@e
fSm|anuKZe
public static void sort(int[] data) { X0]5I0YP
sort(data, IMPROVED_QUICK); yxy~N\0
} .$r7q[
private static String[] name={ {&)E$M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #D8u#8Dz
}; 'n"n;
@?[}\9dW
private static Sort[] impl=new Sort[]{ |\h<!xR
new InsertSort(), }H9V$~}@-
new BubbleSort(), $7&t`E)qY
new SelectionSort(), WeS$$:ro
new ShellSort(), S(5&%}QFQ
new QuickSort(), f:/"OCig
new ImprovedQuickSort(), @@+BPLl
new MergeSort(), )9V8&,
new ImprovedMergeSort(), C,dRdEB>
new HeapSort() 8FT@TUFb
}; ZTi KU)
'<hgc
public static String toString(int algorithm){ fzjZiBK@
return name[algorithm-1]; [hKt4]R
} T|h'"3'
0"xD>ue&
public static void sort(int[] data, int algorithm) { _!E/em
impl[algorithm-1].sort(data); d/`d:g
} :@sjOY
TM`6:5ONv
public static interface Sort { w?A6S-z
public void sort(int[] data); p!p:LSk"/b
} ,Zs*07!$f
4k=LVu]Kcr
public static void swap(int[] data, int i, int j) { Q~$hx{foN
int temp = data; Gq;!g(
data = data[j]; tp3 !6I6
data[j] = temp; Z oQPvs7_
} G:!'hadw
} |Ht~o(]&&/