[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; Tw`F?i~
} IBn'iE[>
int i1=l; 9;;]q?*
int i2=mid+1; Vu_7uSp,)
for(int cur=l;cur<=r;cur++){ My'9S2Y8nv
if(i1==mid+1) ^K1~eb*K
data[cur]=temp[i2++]; `</=AY>
else if(i2>r) C}dKbs^g|
data[cur]=temp[i1++]; <(u3+`f1s
else if(temp[i1] data[cur]=temp[i1++]; G_4K+ -K
else #"3[f@|e
data[cur]=temp[i2++]; T%;k%
} +xoyKP!
} A52LH,
c+)36/; X
} kMfc"JXF
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改进后的归并排序: OX#eLco
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package org.rut.util.algorithm.support; 4eDmLC"Y *
=!I8vQ>
import org.rut.util.algorithm.SortUtil; hlSB7D"d
(r#5O9|S
/** >x|A7iWn{,
* @author treeroot r_!{!i3B
* @since 2006-2-2 !3b|*].B
* @version 1.0 I{*.htt{
*/ \FY/eQ*07
public class ImprovedMergeSort implements SortUtil.Sort { +R{A'Yl[(
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private static final int THRESHOLD = 10; E.zYi7YUKK
XZUB*P}]D
/* d=xI
* (non-Javadoc) ;L\!g%a
* qY*%p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T_5*iwI
*/ ~#IWM+I
public void sort(int[] data) { >uP{9kDm
int[] temp=new int[data.length]; |g: '')>[
mergeSort(data,temp,0,data.length-1); !.tL"U~4
} &"~,V6,q
k=ior
private void mergeSort(int[] data, int[] temp, int l, int r) { 82^ z-t{
int i, j, k; EA%#/n
int mid = (l + r) / 2; |)|vG_
if (l == r) ^6N3nkyZ
return; luG023'
if ((mid - l) >= THRESHOLD) &kr_CP:;
mergeSort(data, temp, l, mid); 4X(1
else 'aSZ!R
insertSort(data, l, mid - l + 1); @vQ;>4i.
if ((r - mid) > THRESHOLD) wt_?B_nR
mergeSort(data, temp, mid + 1, r); nkr,
else OW[/%U>
insertSort(data, mid + 1, r - mid); 0s+rd&
8`rAE_n`%
for (i = l; i <= mid; i++) { )M|O;~q
temp = data; 5sA>O2Rt>
} {3F}Slb
for (j = 1; j <= r - mid; j++) { P}.yEta
temp[r - j + 1] = data[j + mid]; ]/<Qn-BbU
} y$r?t0
int a = temp[l]; G}9bCr,
int b = temp[r]; a-UD_|!
for (i = l, j = r, k = l; k <= r; k++) { (Ay4B*|!
if (a < b) { g O\f:Pg
data[k] = temp[i++]; |aOnV,}
a = temp; }{w_>!ee
} else { +i q+
data[k] = temp[j--]; $J;=Ux)$
b = temp[j]; W:;`
} 2jrX
} =E6i1x%j
} yoQ?lh
wZ\e3H z
/** n_!]B_Vd$
* @param data ([4{n
* @param l &s6(3k
* @param i k{u%p<
*/ 8'g*}[
private void insertSort(int[] data, int start, int len) { ?[L0LL?ce
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Jb)eC?6O
} @]VvqCk
} y!{/'{?P
} #Ko+_Hm?4
} ui#1+p3G
5>z:[OdY*
堆排序： lG[ )8!:+
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package org.rut.util.algorithm.support; =-1^K
w3]0 !)t1
import org.rut.util.algorithm.SortUtil; u_/OTy
q%=7<( w
/** "`1of8$X7
* @author treeroot W)Kpnb7
* @since 2006-2-2 LTls]@N
* @version 1.0 nF!_q;+Vp
*/ NId~|&\
public class HeapSort implements SortUtil.Sort{ iYfLo">
{$QF*j
/* (non-Javadoc) hz~CW-47
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7+Jma!o
*/ 2M(PH]D
public void sort(int[] data) { XKPt[$ab
MaxHeap h=new MaxHeap(); A](}"Pi!n
h.init(data); ?D$b%G{
for(int i=0;i h.remove(); s%TO(vT
System.arraycopy(h.queue,1,data,0,data.length); @*`UOgP7
} |{|r?3
;(iUY/ h[h
private static class MaxHeap{ ^$s~qQQ}B
Iz$W3#hi
void init(int[] data){ J'Mgj$T $
this.queue=new int[data.length+1]; 5)zh@aJ@
for(int i=0;i queue[++size]=data; .]P;fCQmM
fixUp(size); &fNE9peQFa
} lt(-,md
} kk\zZC <
a518N*]j
private int size=0; uL2{v
Vwh&^{Eh
private int[] queue; qu~"C,
LXEu^F~{u#
public int get() { p$!+2=)gY
return queue[1]; s"Pk-Dv
} i\R\bv[9
$q@RHcj
public void remove() { )eGu4iEPM
SortUtil.swap(queue,1,size--); )b2E/G@X&
fixDown(1); yW=hnV{
} `R=_t]ie
file://fixdown Vi-!E
private void fixDown(int k) { )1yUV*6
int j; ujHzG}2z
while ((j = k << 1) <= size) { ZtK%b+MBP
if (j < size %26amp;%26amp; queue[j] j++; p2f WL
if (queue[k]>queue[j]) file://不用交换 =`.5b:e
break; `q{'_\gVt(
SortUtil.swap(queue,j,k); >D^7v(&
k = j; _(s|Q
} 9qO:K79|
} BMsy}08dQ
private void fixUp(int k) { wk <~Y 3u
while (k > 1) { ^VYZ%
int j = k >> 1; 9C'+~<l
if (queue[j]>queue[k]) r L|BkN
break; mt6uW+t/
SortUtil.swap(queue,j,k); wTuRo J
k = j; bFdg'_
} .+~kJ0~Y
} snzH}$Ls
WMz|FFKVY
} Sw9mrhzJfe
G;#t6bk
} IhKas4
+z?f,`.*
SortUtil： &#\7w85$
5}^08Xl
package org.rut.util.algorithm; L5|;VH
SE-, 1p
import org.rut.util.algorithm.support.BubbleSort; n)7$xYuH
import org.rut.util.algorithm.support.HeapSort; ]be2jQx3
import org.rut.util.algorithm.support.ImprovedMergeSort; \c^jaK5
import org.rut.util.algorithm.support.ImprovedQuickSort; O NzdCgY
import org.rut.util.algorithm.support.InsertSort; kk./-G
import org.rut.util.algorithm.support.MergeSort; X!HSS/'
import org.rut.util.algorithm.support.QuickSort; ^>}[[:(6/
import org.rut.util.algorithm.support.SelectionSort; [67f;?b
import org.rut.util.algorithm.support.ShellSort; hr"+0KeX
ZjbG&oc
/** XlcDF|?{.
* @author treeroot q@yabuN@,j
* @since 2006-2-2 _I"<?sh3
* @version 1.0 <y/AEY1
*/ T1W9@9,s
public class SortUtil { vh.tk^&
public final static int INSERT = 1; "YU~QOGx@
public final static int BUBBLE = 2; [#fqyg
public final static int SELECTION = 3; c] 9CN
public final static int SHELL = 4; k yA(m;r
public final static int QUICK = 5; ill'KPy
public final static int IMPROVED_QUICK = 6; ED_5V@
public final static int MERGE = 7; T7nX8{l[RG
public final static int IMPROVED_MERGE = 8; u\Q**m2XP
public final static int HEAP = 9; PsT v\!
bH]!~[
public static void sort(int[] data) { C^v-&*v
sort(data, IMPROVED_QUICK); _;RD-kv
} N28?JQha
private static String[] name={ D_kzR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XQ y|t"Vq>
}; on&=%tCAL
*wyLX9{:
private static Sort[] impl=new Sort[]{ [4yQbqe;
new InsertSort(), 0s[3:bZ\Ia
new BubbleSort(), qCT\rZU
new SelectionSort(), _( /lBf{|
new ShellSort(), \5c -L_
new QuickSort(), $=a$z"
new ImprovedQuickSort(), +W[#;)ea(
new MergeSort(), :u+#:8u
new ImprovedMergeSort(), <G=@Gl
new HeapSort() &!fcLJd
}; B>21A9&
5!fW&OiY
public static String toString(int algorithm){ vyy\^nL
return name[algorithm-1]; 6u3(G j@
} "<R 2oo)^
VQ}3r)ch
public static void sort(int[] data, int algorithm) { ``CADiM:S
impl[algorithm-1].sort(data); vK~KeZ\,p=
} OvG|=
wA&)y>n-
public static interface Sort { Y\S^DJy
public void sort(int[] data); _qNLy/AY
} '0rwNEg
-{mq\GvGn
public static void swap(int[] data, int i, int j) { nit7|T@^
int temp = data; *dgNpJ 9
data = data[j]; |.W;vc<
data[j] = temp; l[{}ZKZ
} bncFrzp#o
} ="E V@H?U