[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; [|(N_[E|6
} S- pV_Ff
int i1=l; K/i*w<aPb7
int i2=mid+1; `6lr4Kk @R
for(int cur=l;cur<=r;cur++){ V^3L3|k
if(i1==mid+1) r'^Hg/Jzt
data[cur]=temp[i2++]; G,o6292hj
else if(i2>r) E"qRw_ ~t
data[cur]=temp[i1++]; kYG/@7f/
else if(temp[i1] data[cur]=temp[i1++]; QPx_-
else gtk7)Uh
data[cur]=temp[i2++]; x=b7':nQ
} tzZ`2pSh
} [N7{WSZ&
)Im#dVQs=
} F`gi_;c
*=]&&<
改进后的归并排序: /{+y2.{j
mRL"nC
package org.rut.util.algorithm.support; 95 ;x=ju
B@&4i?yJ
import org.rut.util.algorithm.SortUtil; M?Dfu .t
DI:]GED"=
/** QZ6D7tUc8
* @author treeroot pR(jglm7-
* @since 2006-2-2 _FH`pv
* @version 1.0 B8f8w)m
*/ xF;kTBRi
public class ImprovedMergeSort implements SortUtil.Sort { _P0T)-X\(
$*e2YQdLo
private static final int THRESHOLD = 10; B* ?]H*K
/|tJ6T1LrB
/* coW:DFX
* (non-Javadoc) &;^YBW:I
* z\K"Rg~J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yE:+Lo`>
*/ R=gb'
public void sort(int[] data) { lR )67a
int[] temp=new int[data.length]; ,?>s>bHV
mergeSort(data,temp,0,data.length-1); X:HacYqtC
} >/l? g5{
ZrPbl"`7
private void mergeSort(int[] data, int[] temp, int l, int r) { vHyC;4'
int i, j, k; zHA!%>%'
int mid = (l + r) / 2; @ [:ZS+1
if (l == r) jrr EAp
return; W>) M5t4i
if ((mid - l) >= THRESHOLD) ^2Fei.?T.
mergeSort(data, temp, l, mid); 2bJQTk_S
else &]`(v}`]
insertSort(data, l, mid - l + 1); ''yB5#^w(
if ((r - mid) > THRESHOLD) z@!`:'ak
mergeSort(data, temp, mid + 1, r); "W6uV!
else OLyf8&AU@
insertSort(data, mid + 1, r - mid); gG0!C))8
BXtCSfY$
for (i = l; i <= mid; i++) { 4Jp:x"w
temp = data; K"|l@Q[
} A)bWcB}U
for (j = 1; j <= r - mid; j++) { i3tg6o4C
temp[r - j + 1] = data[j + mid]; GeyvId03H
} aI P
int a = temp[l]; 7j@Hs[ *
int b = temp[r]; t|g4m[kr
for (i = l, j = r, k = l; k <= r; k++) { C 3^JAP
if (a < b) { -`'I{g&A
data[k] = temp[i++]; 8IlunJ
a = temp; Gr*r=s
} else { 6wBx;y |
data[k] = temp[j--]; QoI3>Oj=
b = temp[j]; cqQ#p2<%
} g%sluT[#
} ?qPo=~y01
} uGwm r
6a[}'/
/** |:nn>E}ZA/
* @param data "|EM;o
* @param l ]D?"aX'q>
* @param i ,]|#[8
*/ *Fy2BZH%Q
private void insertSort(int[] data, int start, int len) { |,S+@"0#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a!a-b~#cx
} >")Tf6zw&
} >"^ O"E
} Nv#t:J9f
} Oxm>c[R
LhA*F[6$M
堆排序： qX/y5F`
(/=f6^}
package org.rut.util.algorithm.support; MLXNZd
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import org.rut.util.algorithm.SortUtil; fT;s-v[`k
joFm]3$;
/** ,f~J`3(&
* @author treeroot "sS}N%!
* @since 2006-2-2 1Ir21un
* @version 1.0 I3aNFa}
*/ 6Y^23W F
public class HeapSort implements SortUtil.Sort{ nr95YSH
<fZyAa3}
/* (non-Javadoc) ?^7t'`zk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2<i!{;u$qL
*/ '=39+*6?
public void sort(int[] data) { BL0 {HV!
MaxHeap h=new MaxHeap(); caIL&G,
h.init(data); m4**~xfC
for(int i=0;i h.remove(); ~5NXd)2+Ks
System.arraycopy(h.queue,1,data,0,data.length); Zq^At+8+
} x3hB5p$q
.!Oo|m`V@
private static class MaxHeap{ nL5cK:
CuFSeRe
void init(int[] data){ J=\HO8E6>
this.queue=new int[data.length+1]; 5&QJ7B,!
for(int i=0;i queue[++size]=data; ?qP7Y nl
fixUp(size); MX$0Op
} !=pn77`g>
} $|L Sx
3DzMB?I
private int size=0; )Q=_0;#;k
b,5~b&<h
private int[] queue; .8@$\ZRP
x6BuF_.
public int get() { YJ^] u}
return queue[1]; bfFeBBi
} zZ7;jyD
aT{_0m$G10
public void remove() { -z-C*%~
SortUtil.swap(queue,1,size--); *F+KqZ.2
fixDown(1); )P%ZA)l%_o
} <lgYcdJ
file://fixdown u8'Zl8g
private void fixDown(int k) { #H)vK"hF
int j; tClg*A;|B
while ((j = k << 1) <= size) { QiQ_bB!\
if (j < size %26amp;%26amp; queue[j] j++; w^?>e;/\
if (queue[k]>queue[j]) file://不用交换 wrc,b{{[iM
break; ^&B@Uw5{
SortUtil.swap(queue,j,k); "7 4-4
k = j; dz:E?
} {Bk[rCl
} riUwBiVa?2
private void fixUp(int k) { >W%EmnLK
while (k > 1) { A}BVep@D
int j = k >> 1; +O"!qAiK
if (queue[j]>queue[k]) 4-?C>
break; .~)q};Z
SortUtil.swap(queue,j,k); O[\iE5+$
k = j; |WQBDB`W
} $ZUdT
} 18|m)(W
'<jyw
} u#Pa7_zBj]
#pT"BSz]
} Vrjc~>X
*U^6u/iH
SortUtil： viW!,QQ(S
({ 8-*
package org.rut.util.algorithm; Ar%%}Gx/
.?D7dyU l1
import org.rut.util.algorithm.support.BubbleSort; `n.5f[wC
import org.rut.util.algorithm.support.HeapSort; Ye\rB\-
import org.rut.util.algorithm.support.ImprovedMergeSort; ~,d,#)VE2q
import org.rut.util.algorithm.support.ImprovedQuickSort; Hn7_FOC
import org.rut.util.algorithm.support.InsertSort; Mz9r5
import org.rut.util.algorithm.support.MergeSort; ~xbe~$$Q@
import org.rut.util.algorithm.support.QuickSort; #9B)Xx!g
import org.rut.util.algorithm.support.SelectionSort; Bgn&:T8<
import org.rut.util.algorithm.support.ShellSort; ,MdV;j~"'
y_'Ub{w
/** LSm$dK
* @author treeroot \<&m&%Zs
* @since 2006-2-2 hjU::m,WX
* @version 1.0 [8P:?nDDL
*/ }v@dL3{f
public class SortUtil { T]R|qlZ
public final static int INSERT = 1; ySk R>y
public final static int BUBBLE = 2; sz5MH!/PJ
public final static int SELECTION = 3; fWCo;4<5?
public final static int SHELL = 4; x5|I
public final static int QUICK = 5; %G3h?3
public final static int IMPROVED_QUICK = 6; FGPB:
public final static int MERGE = 7; w~.f
public final static int IMPROVED_MERGE = 8; wa(8Hl|Y
public final static int HEAP = 9; '@cANGg7[
kj|6iG
public static void sort(int[] data) { 8|b3j^u
sort(data, IMPROVED_QUICK); 2;[D;Y}
} &LmJ!^#
private static String[] name={ 4ae`pAu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?# Mr
}; 8/DS:uM
QsGiclU
private static Sort[] impl=new Sort[]{ 3RiWZN
new InsertSort(), H;D>|q
new BubbleSort(), Qwz}B
new SelectionSort(), v&Ii^?CvO
new ShellSort(), Bt[/0>i
new QuickSort(), \@-@Y
new ImprovedQuickSort(), f"B3,6m
new MergeSort(), b[__1E9v'
new ImprovedMergeSort(), %&$Tz1"
new HeapSort() !5wIIS:FT
}; x* DarSk
g6W)4cC8a
public static String toString(int algorithm){ S_iMVHe
return name[algorithm-1]; )r';lGh2#
} "C?#SO B
BmBj7
public static void sort(int[] data, int algorithm) { "MxnFeLM#
impl[algorithm-1].sort(data); Okgv!Nt8)A
} w _u\pa
rJd,Rdt.
public static interface Sort { NnO~dRx{
public void sort(int[] data); zqd@EF6/bz
} LU+3{O5y
t^VwR=i
public static void swap(int[] data, int i, int j) { Bm.afsM;
int temp = data; F^l[GdUosK
data = data[j]; 5VRYO"D:
data[j] = temp; DDvh4<Hk
} sJ\BF
} HPpR.