[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; @ ZwvBH
} G5RR]?@6V
int i1=l; Zq|I,l0+E
int i2=mid+1; t#/YN.@r
for(int cur=l;cur<=r;cur++){ !t%j?\f
if(i1==mid+1) VT%NO'0
data[cur]=temp[i2++]; /W30~y
else if(i2>r) ?)?Ng}
data[cur]=temp[i1++]; 2c,9e`
else if(temp[i1] data[cur]=temp[i1++]; 0hNA1Fh{U
else Gg3,:A_ w
data[cur]=temp[i2++]; y$F'(b|)
} AGO+p(6d=g
} Ae^~Cz1qz
3!Ij;$
} tr3!d_
?|C2*?hZ+
改进后的归并排序: -.@r#d/
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package org.rut.util.algorithm.support; b8VTo lJ
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import org.rut.util.algorithm.SortUtil; }wjw:M
"3"V3w
/** cAqLE\h
* @author treeroot vq0Tk bzs
* @since 2006-2-2 2dcV"lY
* @version 1.0 E`0?
*/ C8:f_mJU
public class ImprovedMergeSort implements SortUtil.Sort { r1m]HFN
'8.r-`l(
private static final int THRESHOLD = 10; /?'FE 7Y
#7$ H
/* eIEeb,#i
* (non-Javadoc) q&-`,8#
* |`,2ri*5A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \fr~
*/ IH&|Tcf\
public void sort(int[] data) { V`d,qn)i
int[] temp=new int[data.length]; +wU@ynw
mergeSort(data,temp,0,data.length-1); F>6|3bOR
} =^f<v_L
$}q23
private void mergeSort(int[] data, int[] temp, int l, int r) { GPv1fearl
int i, j, k; 82qoGSD.
int mid = (l + r) / 2; YnS#H"
if (l == r) wn, KY$/
return; DE8n+Rm
if ((mid - l) >= THRESHOLD) #PW9:_BE
mergeSort(data, temp, l, mid); oUr66a/[U
else 9@:2wR |
insertSort(data, l, mid - l + 1); Jk11fn;\>
if ((r - mid) > THRESHOLD) kGS;sB
mergeSort(data, temp, mid + 1, r); =tn)}Y.<e
else 0c]/bs{}
insertSort(data, mid + 1, r - mid); N7QK> "a
,vawzq[oSy
for (i = l; i <= mid; i++) { "'.UU$]d
temp = data; Z'W=\rl
} "1*:JVG
for (j = 1; j <= r - mid; j++) { VG#EdIiI
temp[r - j + 1] = data[j + mid]; vjCu4+w($Z
} 3E]plj7$
int a = temp[l]; ^4hO
int b = temp[r]; Xp% v.M
for (i = l, j = r, k = l; k <= r; k++) { "5!oi]@>(
if (a < b) { uc\Kg1{
data[k] = temp[i++]; \<>ih)J@tt
a = temp; CL;}IBd a
} else { OU.6bmWy|
data[k] = temp[j--]; JPUW6e07o
b = temp[j]; qLG&WB
} RFcv^Xf
} )}(^, Fo c
} |O+H[;TB6
) 7@ `ut
/** +oML&g-g_
* @param data gp?uHKsM
* @param l @)M9IOR
* @param i : /N0!&7
*/ 9};8?mucr
private void insertSort(int[] data, int start, int len) { yu|8_<bq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FUb\e-Q=
} Y%^w:|f^
} 5yo%$i8I
} k FD;i
} ~&{S<Wl
'ya{9EdlT
堆排序： H;LViP2K*
=zPCrEk0
package org.rut.util.algorithm.support; 7"x;~X
g%I"U>!2
import org.rut.util.algorithm.SortUtil; xml7Uarc
pRpBhm;iJ
/** m,w A:o$'
* @author treeroot [kB7@o
* @since 2006-2-2 !hy-L_wL]
* @version 1.0 Lv7(st%`
*/ 3M7/?TMw{6
public class HeapSort implements SortUtil.Sort{ Tv=mgH=b
uyWunpT
/* (non-Javadoc) W,n!3:7s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lNh70G8^p
*/ AKfDXy
public void sort(int[] data) { ((;!<5-`s
MaxHeap h=new MaxHeap(); Eyqa?$R
h.init(data); @n /nH?L
for(int i=0;i h.remove(); 'sKk"bi;0
System.arraycopy(h.queue,1,data,0,data.length); tw/dD +
} q3N jky1w
o#Dk& cH
private static class MaxHeap{ ()?(I?II
`UaD6Mc<Mz
void init(int[] data){ +GN(Ug'R
this.queue=new int[data.length+1]; `HSKQ52
for(int i=0;i queue[++size]=data; _<V)-Y
fixUp(size); F~W6Bp^W
} ueWEc^_>
} 3(N$nsi
.!3|&V'<
private int size=0; P3=G1=47U
RSRS wkC
private int[] queue; {\1?ZrCI&
\?-<4Bc@
public int get() { Hzz %3}E
return queue[1]; yx[/|nZDC4
} '<)n8{3Q5w
Q&tG4f<
public void remove() { L`TLgH&?R
SortUtil.swap(queue,1,size--); U< fGGCw
fixDown(1); rZ$O?K
} Of#u
file://fixdown +TL%-On
private void fixDown(int k) { pah'>dAL
int j; K@]4g49A/j
while ((j = k << 1) <= size) { T&bYa`f]
if (j < size %26amp;%26amp; queue[j] j++; Dml;#'IF3
if (queue[k]>queue[j]) file://不用交换 #:_Kws>+
break; G~a ZJ,
SortUtil.swap(queue,j,k); Dx?,=~W9
k = j; LonxT&"!D
} Bkc4TO
} i&fuSk EP
private void fixUp(int k) { &6!)jIWJ
while (k > 1) { 8dA~\a
int j = k >> 1; #zs~," dRv
if (queue[j]>queue[k]) K5h
break; *?vCC+c
SortUtil.swap(queue,j,k); <n$'voR7]
k = j; (%6P0*
} 9.-S(ZO
} hi(;;C9
%sP*=5?vA
} 'IQ0{&EI
Bsvr?|L\
} IEi^kJflU
uGGt\.$]s
SortUtil： C}Cs8eUn
=UQ3HQD
package org.rut.util.algorithm; \}b%E'+_T
vvMT}-!
import org.rut.util.algorithm.support.BubbleSort; !Ai@$tl[S
import org.rut.util.algorithm.support.HeapSort; [9L:),&u
import org.rut.util.algorithm.support.ImprovedMergeSort; FW4<5~'
import org.rut.util.algorithm.support.ImprovedQuickSort; 6nvz8f3*r]
import org.rut.util.algorithm.support.InsertSort; Yj49t_$b
import org.rut.util.algorithm.support.MergeSort; qyTU8Wp
import org.rut.util.algorithm.support.QuickSort; 03Ycf'W
import org.rut.util.algorithm.support.SelectionSort; (L&d!$,Dv
import org.rut.util.algorithm.support.ShellSort; bI1N@=
{!L~@r
/** /([kh~a
* @author treeroot Lqa4Vi
* @since 2006-2-2 #;yZ
* @version 1.0 =; Ff4aF
*/ N4!O.POP
public class SortUtil { Ti5-6%~&
public final static int INSERT = 1; 6H$FhJF
public final static int BUBBLE = 2; -Q*gW2KmV
public final static int SELECTION = 3; O^ yG?b
public final static int SHELL = 4; 24eLB?H
public final static int QUICK = 5; {EQOP]
public final static int IMPROVED_QUICK = 6; g) jYFfGfH
public final static int MERGE = 7; }Sv:`9=
public final static int IMPROVED_MERGE = 8; T0)@pt7>
public final static int HEAP = 9; #\OA)`U
~f98#43
public static void sort(int[] data) { aW7^d'ZZ\
sort(data, IMPROVED_QUICK); 8l`*]1.W<
} f]CXu3w(J
private static String[] name={ h:|qC`}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wmLs/:~
}; sO@Tf\d
UaeXY+O
private static Sort[] impl=new Sort[]{ :vbW
new InsertSort(), O\r0bUPE
new BubbleSort(), ~9@UjQ^)F
new SelectionSort(), kxv1Hn"`{E
new ShellSort(), YaqJ,"GlT
new QuickSort(), 7kEn \
new ImprovedQuickSort(), \4fQMG
new MergeSort(), c^W)07-X5y
new ImprovedMergeSort(), a:w#s}bL
new HeapSort() &^jXEz;
}; ^1];S^nD
G 3ptx! D
public static String toString(int algorithm){ @j/a=4o[
return name[algorithm-1]; <LiPEo.R
} tR$NRMZ.
]/L0,^RI
public static void sort(int[] data, int algorithm) { <e6#lFQqK
impl[algorithm-1].sort(data); ckCE1e>s
} D0f]$
J|73.&B
public static interface Sort { `ERz\`d~Y;
public void sort(int[] data); M_DwUS1?
} +NUG
X&H"51
public static void swap(int[] data, int i, int j) { eHUOU>&P]
int temp = data; K[YyBEid
data = data[j]; ~D>p0+-c
data[j] = temp; !4+<<(B=E
} ox.F%)eQ
} $XH^~i;