[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; -C$Z%I7 0
} m,nV,}@J
int i1=l; md[FtcY\
int i2=mid+1; e=t?mDh#E
for(int cur=l;cur<=r;cur++){ 5G8`zy
if(i1==mid+1) v |/IN
data[cur]=temp[i2++]; M%7H-^{
else if(i2>r) x>Ah4ad
data[cur]=temp[i1++]; s(7'*`G"h
else if(temp[i1] data[cur]=temp[i1++]; lj"L Q(^
else 2aUz.k8o
data[cur]=temp[i2++]; =+gp~RR,
} z`uqK!v(K
} ;_0)f
JWG7QH
} 3uwZ#
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改进后的归并排序: 78tWzO
`$`:PT\Zv4
package org.rut.util.algorithm.support; mQ#@"9l%
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import org.rut.util.algorithm.SortUtil; [d!C6FT
zTY|Z@:
/** =y7]9SOq
* @author treeroot 3Z'{#<1>^;
* @since 2006-2-2 G?QFF6)}!
* @version 1.0 ~c!zTe
*/ EU,4qO
public class ImprovedMergeSort implements SortUtil.Sort { 6<H[1PI`,G
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private static final int THRESHOLD = 10; @6GM)N\{[
7|6tH@4Ub
/* +7<{yP6wU
* (non-Javadoc) _u}v(!PI
* L{2\NJ"+u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !?tWWU%P)
*/ /#$bb4
public void sort(int[] data) { !U]V?Jpi"
int[] temp=new int[data.length]; CTtF=\
mergeSort(data,temp,0,data.length-1); G;Y,C<)0k
} SPsq][5eR
f7X#cs)a
private void mergeSort(int[] data, int[] temp, int l, int r) { BmrP]3W?
int i, j, k; }Iub{30mp
int mid = (l + r) / 2; 8BNsh[+
if (l == r) ^Gv<Xl
return; :=~%&
if ((mid - l) >= THRESHOLD) >4\V/ I
mergeSort(data, temp, l, mid); l{#m"S7J^
else iCN@G&rVw
insertSort(data, l, mid - l + 1); 6u7(}K
if ((r - mid) > THRESHOLD) *wp'`3y}
mergeSort(data, temp, mid + 1, r); N(&FATZUW
else >^:g[6Sj
insertSort(data, mid + 1, r - mid); [CPZj*|b
r_xo>y~S
for (i = l; i <= mid; i++) { Beqhe\{
temp = data; EyNI]XEj
} T9Vyj3!i_
for (j = 1; j <= r - mid; j++) { j`BFk>
temp[r - j + 1] = data[j + mid]; Vu\|KL|
} R)cns7oW
int a = temp[l]; F.A<e #e?
int b = temp[r]; 94APjqV6'
for (i = l, j = r, k = l; k <= r; k++) { w^|,[G^}H
if (a < b) { X3L9j(
data[k] = temp[i++]; w#F+rh3
a = temp; |@nvg>mu
} else { e+y< a~N
data[k] = temp[j--]; 4Bx1L+Cg
b = temp[j]; d@At-Z~M
} ![Ip)X OG
} +7 F7Kh
} K- }k-S
P+}qaup
/** q'(WIv@
* @param data !+uMH!
* @param l 'dWJ#9C
* @param i phXVuQ
*/ ZX'{o9+w5
private void insertSort(int[] data, int start, int len) { h| UT/:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IU$bP#<
} {'DP/]nK
} +"3eh1q[
} V2VsJ
} h!K B%4V
IJ4"X#Q/
堆排序： sTG+c E
2)j\Lg_M
package org.rut.util.algorithm.support; 1.,mNY^UN
d`~#uN {
import org.rut.util.algorithm.SortUtil; 1xguG7
!-.-!hBN
/** v9inBBC q
* @author treeroot _D,8`na>K
* @since 2006-2-2 tB_V%qH
* @version 1.0 hsqUiB tc6
*/ W$'pUhq\H
public class HeapSort implements SortUtil.Sort{ C9=f=sGL
J$e.$ah;
/* (non-Javadoc) K,IOD t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N7oMtlvL[w
*/ J~_p2TZJ\3
public void sort(int[] data) { J.<eX=<
MaxHeap h=new MaxHeap(); p1?}"bHk
h.init(data); 3~cOQ%#]4
for(int i=0;i h.remove(); A^K,[8VX
System.arraycopy(h.queue,1,data,0,data.length); M%B[>pONb7
} l m
e-e{-pB6
private static class MaxHeap{ 5)nv
}qKeX4\-
void init(int[] data){ Xx'>5d>
this.queue=new int[data.length+1]; y5Pw*?kn
for(int i=0;i queue[++size]=data; ';ZJuJ.
fixUp(size); WN?T*bz2
} fwq|8^S@
} ^mJvB[ u|
e< CPaun
private int size=0; "^XN"SUw
Q}=RG//0*
private int[] queue; 3Aj_,&X.@(
c%Gz{':+
public int get() { zr[~wM
return queue[1]; '^/E2+
} /vPb
cw5YjQ8 9
public void remove() { 8m1zL[.8g
SortUtil.swap(queue,1,size--); #>- rKv.A
fixDown(1); D{loX6
} *$cp"
file://fixdown 9~; Ju^b
private void fixDown(int k) { aDOH3Ri0K!
int j; X~DXx/9
while ((j = k << 1) <= size) { 4O`h%`M
if (j < size %26amp;%26amp; queue[j] j++; #!5Nbe
if (queue[k]>queue[j]) file://不用交换 u}:O[DG
break; ^=W&p%Y(!
SortUtil.swap(queue,j,k); 8 6+>|
k = j; k9n
} %om7h$D=`
} &*yve}su
private void fixUp(int k) { ZbrE m
while (k > 1) { Za f)
int j = k >> 1; V")Q4h{
if (queue[j]>queue[k]) <=-\so(
break; z8!u6odu %
SortUtil.swap(queue,j,k); ~>C>LH>8
k = j; -24.[E/5
} Q&#:M>!|
} P X0#X=$
=B:poh[u
} O.E0LCABC
:I$2[K
} {S}@P~H=
Yo(B8}?0!
SortUtil： i\Vpp8<B
NN:TT\!v
package org.rut.util.algorithm; ;MMFF{
</=PN1=A
import org.rut.util.algorithm.support.BubbleSort; RnrM rOh
import org.rut.util.algorithm.support.HeapSort; j<KC$[Kt
import org.rut.util.algorithm.support.ImprovedMergeSort; I;v`o{
import org.rut.util.algorithm.support.ImprovedQuickSort; OZ" <V^"`
import org.rut.util.algorithm.support.InsertSort; Imwx~eo
import org.rut.util.algorithm.support.MergeSort; 8`t%QhE2
import org.rut.util.algorithm.support.QuickSort; :acQK=fe
import org.rut.util.algorithm.support.SelectionSort; ry\']\k
import org.rut.util.algorithm.support.ShellSort; o{he)r6)_
VM,ZEt3Vy
/** Za6oYM_z
* @author treeroot Hj\~sR$L-
* @since 2006-2-2 aOHCr>po,
* @version 1.0 ,$]q2aL
*/ N93E;B
public class SortUtil { _tk5?9Ykn
public final static int INSERT = 1; vck$@3*
public final static int BUBBLE = 2; ) G{v>Z,
public final static int SELECTION = 3; 3XnXQ/({
public final static int SHELL = 4; $"8k|^Z3
public final static int QUICK = 5; w!}1oy
public final static int IMPROVED_QUICK = 6; 6a?y$+pr
public final static int MERGE = 7; vVW=1(QWI#
public final static int IMPROVED_MERGE = 8; o.5j@dr
public final static int HEAP = 9; W.|6$hRl)
LasH[:QQQ
public static void sort(int[] data) { r$F]e]Ic\
sort(data, IMPROVED_QUICK); p.9v<I%0
} y]l"u=$Tr{
private static String[] name={ ]#$kA9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3ngLEWT
}; sb @hGS
3CE8+PnT
private static Sort[] impl=new Sort[]{ g5Dx9d{
new InsertSort(), {K:Utdu($q
new BubbleSort(), $dP)8_Z2
new SelectionSort(), z6lz*%Yi
new ShellSort(), +V@=G &Ou0
new QuickSort(), cDiz!n*.q
new ImprovedQuickSort(), +29\'w,
new MergeSort(), {h"\JI!
new ImprovedMergeSort(), @__;RVQ
new HeapSort() Nd_@J&
}; F[EblJ
Q:gn>/
public static String toString(int algorithm){ }$U[5wL,_
return name[algorithm-1]; 'j_H{kQy
} 6^|6V
a<wZv-\Vau
public static void sort(int[] data, int algorithm) { V]]qu:Mh8
impl[algorithm-1].sort(data); |T_Pz&-
} pxxFm~"d
qDM[7q3.
public static interface Sort { +q/h:q.TV
public void sort(int[] data); Qu,k
} t^,Qy.L0
358/t/4{p
public static void swap(int[] data, int i, int j) { IxZ.2 67
int temp = data; n\-_i2yy
data = data[j]; ^\&g^T%
data[j] = temp; ;a&:r7]=
} oKi1=d+T
} el?V2v[