[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; .Pz( 0Y
} RY8Ot2DWi
int i1=l; +n#(QOz
int i2=mid+1; =b\k$WQ_(
for(int cur=l;cur<=r;cur++){ SRL`!
if(i1==mid+1) \1k(4MWd
data[cur]=temp[i2++]; ~nul[>z
else if(i2>r) Grot3a
data[cur]=temp[i1++]; H"~]|@g-p
else if(temp[i1] data[cur]=temp[i1++]; e+Qq a4
else '<(S*&s
data[cur]=temp[i2++]; Ml)0z&jQX
} rLt`=bl&&U
} 2L=+z1%I
)`Zj:^bz9
} ^Rgm3?7
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改进后的归并排序: v4X\LsOP
/]0-|Kg+R
package org.rut.util.algorithm.support; Rg4'9I%B
!rmXeN]-r
import org.rut.util.algorithm.SortUtil; P F#X8+&J
V1aWVLltj
/** 2.Kbj^
* @author treeroot x6=Yt{
* @since 2006-2-2 #X~{p4Lr
* @version 1.0 x2@Q5|a
*/ )(&Z&2~A
public class ImprovedMergeSort implements SortUtil.Sort { ql Z()
`R}q&|o7<
private static final int THRESHOLD = 10; fpj,~+
)s @}|`
/* SZGeF;N
* (non-Javadoc) <IiX_*
* C~C}b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >Ln/)j
*/ O\=U'6@
public void sort(int[] data) { ze%kP#c6!
int[] temp=new int[data.length]; J;?#Zt]`L
mergeSort(data,temp,0,data.length-1); Ww8C}2g3
} aT v
fgmu*\x<
private void mergeSort(int[] data, int[] temp, int l, int r) { ]h]|PdN
int i, j, k; :/F=j;o
int mid = (l + r) / 2; `# N j8
if (l == r) BhO*Pfs
return; g;N)K3\2
if ((mid - l) >= THRESHOLD) QKj8~l(
mergeSort(data, temp, l, mid); R`)^eqB
else |sQC:y>
insertSort(data, l, mid - l + 1); 'X()|{
if ((r - mid) > THRESHOLD) jm|x=s3}h
mergeSort(data, temp, mid + 1, r); =F!_ivV
else ,\HZIl[8
insertSort(data, mid + 1, r - mid); .@#GNZe
L4fM?{Ic:s
for (i = l; i <= mid; i++) { 5xHP5+&
temp = data; Z*9Qeu-N:
} )<]*!
for (j = 1; j <= r - mid; j++) { yvPcD5s5
temp[r - j + 1] = data[j + mid]; yuTSzl25,/
} a>3#z2#
int a = temp[l]; K>!+5A$6i
int b = temp[r]; DEdJH4
for (i = l, j = r, k = l; k <= r; k++) { j. @CB`
if (a < b) { |.OXe!uU41
data[k] = temp[i++]; @X_<y
a = temp; *bi!iz5F
} else { jH4,-
data[k] = temp[j--]; aan)yP
b = temp[j]; <{t*yMr
} _$&C$q$1y
} =/ b2e\
} X?2ub/Nr#Y
PWch9p0U
/** I}?+>cf
* @param data 2X:OS/
* @param l *wSz2o),
* @param i 0 `Yg
*/ Yqpe2II7
private void insertSort(int[] data, int start, int len) { B+8lp4V9%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fFr[ &\[
} NCid`a$
} E46+B2_~zk
} DdI V~CxD
} Hp#IOsP~
1FkS$ j8:
堆排序： D-v}@tS'
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package org.rut.util.algorithm.support; ji8)/
VL[}
import org.rut.util.algorithm.SortUtil; bu}N{cW
I%8>nMTJ
/** ^V5VRGq
* @author treeroot ;5ANw"Dq
* @since 2006-2-2 kMCgfL
* @version 1.0 4!l%@R>O2
*/ 3 P)N,
public class HeapSort implements SortUtil.Sort{ !4?QR
AW\#)Em
/* (non-Javadoc) AA&5wDMV>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KF.d:
*/ [v,Y-}wQ)
public void sort(int[] data) { 5s /fBS
MaxHeap h=new MaxHeap(); )0tq&
h.init(data); 5[qCH(6
for(int i=0;i h.remove(); 7uI~Xo?N
System.arraycopy(h.queue,1,data,0,data.length); cBGR%w\t%
} hFLLg|@
4ayZ.`aK
private static class MaxHeap{ f@)GiLC'"
z:Q4E|IX
void init(int[] data){ Z%_m<Nf8T
this.queue=new int[data.length+1]; 9pehQFfH
for(int i=0;i queue[++size]=data; %F.^cd"
fixUp(size); 5nQxVwY
} 5GHW~q!Zo\
} _d J"2rx
;d#`wSF`G
private int size=0; !#b8QER
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private int[] queue; UpoTXAD}k
HOPi2nf{
public int get() { #[<XNs!"
return queue[1]; iN]#XIQ%
} $z":E(oy
9Q.}jV
public void remove() { c_RAtM<n
SortUtil.swap(queue,1,size--); M{
fixDown(1); wq6.:8Or-]
} 920 o]Dh=t
file://fixdown ;bh[TmQTJ
private void fixDown(int k) { exfJm'R?n
int j; Mu>WS)1lS
while ((j = k << 1) <= size) { y(2FaTjM
if (j < size %26amp;%26amp; queue[j] j++; ,|Xibfw
if (queue[k]>queue[j]) file://不用交换 >ow5aOlQ&
break; nN|1cJ'.Fk
SortUtil.swap(queue,j,k); aplOo[
k = j; u@ psVt
} HZ8k%X}1
} ~a RK=i$F
private void fixUp(int k) { S@WzvM
while (k > 1) { "n Zhuk
int j = k >> 1; ta)'z@V@g
if (queue[j]>queue[k]) OqW (C
break; NR@n%p
SortUtil.swap(queue,j,k); m~xO;_m
k = j; :~gG]|F
} G|,'6|$jE
} =w#sCy
~,: FZ1wh
} X7~AqG
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} m@2;9
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SortUtil： Kz`g Q|S
D3MRRv#
package org.rut.util.algorithm; qL 0{w7
tPb$ua|
import org.rut.util.algorithm.support.BubbleSort; dEuts*@Q
import org.rut.util.algorithm.support.HeapSort; nYF;.k
import org.rut.util.algorithm.support.ImprovedMergeSort; 6k%Lc4W
import org.rut.util.algorithm.support.ImprovedQuickSort; <`/22S"
import org.rut.util.algorithm.support.InsertSort; fkjo
import org.rut.util.algorithm.support.MergeSort; 'K:zW>l
import org.rut.util.algorithm.support.QuickSort; VBe.&b8
import org.rut.util.algorithm.support.SelectionSort; LaolAqU
import org.rut.util.algorithm.support.ShellSort; 74u_YA<"
iXJ3B&x
/** Tz"Xm/Gy
* @author treeroot F4xXJ"vc
* @since 2006-2-2 y))) {X
* @version 1.0 zQNkjQ{mx
*/ q(C<w
public class SortUtil { =8!FY"c*
public final static int INSERT = 1; c@xQ2&i
public final static int BUBBLE = 2; )>X C_ R
public final static int SELECTION = 3; ZNX=]]HM<n
public final static int SHELL = 4; `Zm-F
public final static int QUICK = 5; btV Tt5
public final static int IMPROVED_QUICK = 6; XX:?7:j}[8
public final static int MERGE = 7; c<c"n'
public final static int IMPROVED_MERGE = 8; h jCkj(b
public final static int HEAP = 9; |8:IH@K*
f#mcWL1}
public static void sort(int[] data) { 4*vV9*'!
sort(data, IMPROVED_QUICK); #,4CeD|(D,
} s?g`ufF.t
private static String[] name={ A3Lfh6O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8FmRD
}; JO^E x1c
cp&- 6 w+
private static Sort[] impl=new Sort[]{ hj_%'kk-A
new InsertSort(), 6hvmp
new BubbleSort(), PI5a'k0F
new SelectionSort(), b# RTHe&X
new ShellSort(), r{Cbx#;
new QuickSort(), ox2?d<dC6
new ImprovedQuickSort(), u*aFWl]=
new MergeSort(), i3s,C;7[2
new ImprovedMergeSort(), m/`"~@}&
new HeapSort() 4 )U,A~!
}; e_6-+l!f
AusCU~:>
public static String toString(int algorithm){ !&ly :v!
return name[algorithm-1]; iO 9fg
} wP <)
Gh:hfHiG
public static void sort(int[] data, int algorithm) { 5dPPm%U{
impl[algorithm-1].sort(data); z'(][SB
} =y>g:}G7
(1|_Nr
public static interface Sort { %nmD>QCe
public void sort(int[] data); PZDj)x_%B&
} >H*?ktcW
7E-1 #4
public static void swap(int[] data, int i, int j) { ^zv,VD
int temp = data; giDe
data = data[j]; ir-= @@
data[j] = temp; m-M.F9R
} ,Qd;t
} +a{P,fRl@