[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; bcyzhK=
} 1 zZlC#V
int i1=l; 3$tdwe$S
int i2=mid+1; v19-./H^ j
for(int cur=l;cur<=r;cur++){ 4*L_)z&4;
if(i1==mid+1) @~e5<:|5#
data[cur]=temp[i2++]; -=="<0c
else if(i2>r) #E?4E1bnB
data[cur]=temp[i1++]; J,hCvm
else if(temp[i1] data[cur]=temp[i1++]; \+etCo
else M:8R-c#![
data[cur]=temp[i2++]; `uFdwO'DD
} {ax:RUQxy
} wJ]d&::@h
| Iib|HQ)
} ^~dWU>
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改进后的归并排序: Q8NX)R
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package org.rut.util.algorithm.support; '%qr.T %
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import org.rut.util.algorithm.SortUtil; |>Vb9:q9Po
ok[i<zl;'
/** {=WgzP
* @author treeroot yfSmDPh
* @since 2006-2-2 hM{bavd
* @version 1.0 `A>@]d
*/ +TJCLZ..
public class ImprovedMergeSort implements SortUtil.Sort { M{@(G5
=(Mch~
private static final int THRESHOLD = 10; g(052]
f 2.HF@
/* q'DW~!>qX
* (non-Javadoc) BLttb
* Wri<h:1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bsX[UF
*/ ,hVli/
public void sort(int[] data) { x4 yR8n(
int[] temp=new int[data.length]; pb}*\/s
mergeSort(data,temp,0,data.length-1); \bcLiKE{
} KwS@D9bok
vt8By@]:
private void mergeSort(int[] data, int[] temp, int l, int r) { ]`K2N
int i, j, k; vgPCQO([
int mid = (l + r) / 2; sT)CxOV
if (l == r) m@c)Xci
return; [6fQ7uFMM8
if ((mid - l) >= THRESHOLD) +rd+0 `}C
mergeSort(data, temp, l, mid); e= AKD#
else yAt^;
insertSort(data, l, mid - l + 1); [~HN<>L@C
if ((r - mid) > THRESHOLD) W4S,6(
mergeSort(data, temp, mid + 1, r); <YY14p
else >Ry01G]_/h
insertSort(data, mid + 1, r - mid); *pq\MiD/
!a`&O-ye
for (i = l; i <= mid; i++) { N)T}P\l
temp = data; CrLrw T
} ^sw?gH*
for (j = 1; j <= r - mid; j++) { EwN}l
temp[r - j + 1] = data[j + mid]; 0S"MC9beg
} ~Y;*u]^
int a = temp[l]; #mF"1QW
int b = temp[r]; K-4PI+qQ\
for (i = l, j = r, k = l; k <= r; k++) { _b 0&!l<
if (a < b) { n S=W1zf
data[k] = temp[i++]; HfVZ~PP
a = temp; +%'(!A?*`
} else { Da|z"I x
data[k] = temp[j--]; mt .sucT
b = temp[j]; }7Uoh(d
} lN@o2QX
} ^c|/*u
} iTwm3V P
;pAK_>
/** GOPfXtkC
* @param data ;p//QJB9
* @param l _)8s'MjA:&
* @param i jp,4h4C^)
*/ K0~rN.C!0
private void insertSort(int[] data, int start, int len) { ?4,T}@P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1?}T=)3+$
} A^g(k5M*
} dN q$}
} h{Y",7]!
} D7Z /H'|
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堆排序： Xvu(vA
tw;}jh
package org.rut.util.algorithm.support; 1Mzmg[L8
1M6D3d_
import org.rut.util.algorithm.SortUtil; a(nlTMfu
dd;~K&_Q/i
/** ?9/G[[(
* @author treeroot zCZf%ATq
* @since 2006-2-2 :Ye !w$r
* @version 1.0 4s-!7
*/ e ,(mR+a8
public class HeapSort implements SortUtil.Sort{ vsPu*[%
@JMiO^
/* (non-Javadoc) fhiM U8(&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V gWRW7Se
*/ Ml_^ `vn
public void sort(int[] data) { o-5TC
MaxHeap h=new MaxHeap(); !L(^(;$Kgr
h.init(data); (QEG4&9
for(int i=0;i h.remove(); +7Gwg
System.arraycopy(h.queue,1,data,0,data.length); )nkY_'BV
} L *wYx|
K-v#.e4
private static class MaxHeap{ D*jM1w_`
pi(m7Ci"
void init(int[] data){ Sjqpec8
this.queue=new int[data.length+1]; Lbgi7|&
for(int i=0;i queue[++size]=data; Wr 4,YQM
fixUp(size); XFl6M~ c
} }bxs]?OW>
} c 9Mz]1@f
{: /}NpA$
private int size=0; Txu/{M,
6K^#?Bn;
private int[] queue; Dt@SqX:~Ee
Nn6%9PX_)
public int get() { kiEa<-]
return queue[1]; {7[Ox<Ho
} N2G{<>=
)=+|i3]U
public void remove() { 5pX6t
SortUtil.swap(queue,1,size--); 6nn*]|7
fixDown(1); /~1+i'7V.,
} ("KF'fp&M2
file://fixdown |!ELV7?(
private void fixDown(int k) { "oyo#-5z
int j; w;M#c Y
while ((j = k << 1) <= size) { I9^x,F"E]
if (j < size %26amp;%26amp; queue[j] j++; pa+hL,w{6
if (queue[k]>queue[j]) file://不用交换 :OT&
break; M\j.8jG
SortUtil.swap(queue,j,k); ZJoM?g~WFI
k = j; }f ?y* H
} mH(:?_KrS-
} zLQx%Yg!
private void fixUp(int k) { }MySaL>
while (k > 1) { w0. u\
int j = k >> 1; +{]j]OP
if (queue[j]>queue[k]) k$VlfQ'+
break; ]Ljf?tk
SortUtil.swap(queue,j,k); %d@z39-;
k = j; [),ige
} C!gZN9-
} Ry&6p>-
tbr=aY$jY
} X}]-*T|a
R2NZ{"h
} 6Wn1{v0
4+n\k
SortUtil： ;uW FHc5@B
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package org.rut.util.algorithm; pH;%ELZ
%b0*H_ok7
import org.rut.util.algorithm.support.BubbleSort; Jm@oDME_E
import org.rut.util.algorithm.support.HeapSort; 4H/OBR
import org.rut.util.algorithm.support.ImprovedMergeSort; _1^'(5f$
import org.rut.util.algorithm.support.ImprovedQuickSort; c-w)|-ac.
import org.rut.util.algorithm.support.InsertSort; z:O8Ls^\T
import org.rut.util.algorithm.support.MergeSort; pg.%Pdr<$
import org.rut.util.algorithm.support.QuickSort; UiWg<_<t
import org.rut.util.algorithm.support.SelectionSort; $G>.\t
import org.rut.util.algorithm.support.ShellSort; ]:;&1h3'7
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/** %O<BfIZ
* @author treeroot Cx"sw }
* @since 2006-2-2 bt *k.=p
* @version 1.0 -j(6;9"7]|
*/ A&{Nh` q
public class SortUtil { reVgqYp{{-
public final static int INSERT = 1; PF2nLb2-
public final static int BUBBLE = 2; G$PE}%X
public final static int SELECTION = 3; k)u[0}
public final static int SHELL = 4; =Qq+4F)MD
public final static int QUICK = 5; IV-{ve6
public final static int IMPROVED_QUICK = 6; 6@f-Glwg
public final static int MERGE = 7; Vl]>u+YqE
public final static int IMPROVED_MERGE = 8; :&Nbw
public final static int HEAP = 9; p_ =z#
AW .F3hN)
public static void sort(int[] data) { 0:+E-^X
sort(data, IMPROVED_QUICK); DIvHvFss
} i4Jc.8^9$
private static String[] name={ oU|c.mYe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |qLh5Ty
}; =41xkAMnk
$kgVa^
private static Sort[] impl=new Sort[]{ e!`i3KYn"
new InsertSort(), !k%#R4*>
new BubbleSort(), <{pz<io)
new SelectionSort(), t) +310w
new ShellSort(), g}i61(
new QuickSort(), PH"%kCI:
new ImprovedQuickSort(), $( )>g>%
new MergeSort(), =;k|*Ny
new ImprovedMergeSort(), "b[5]Y{ U
new HeapSort() l, wp4Ll
}; 5f/`Q
5xde;
public static String toString(int algorithm){ l0] EX>"E
return name[algorithm-1]; wzaV;ac4K
} ,Q,^3*HX9}
*I'yH8Fcn
public static void sort(int[] data, int algorithm) { kT?J5u_o
impl[algorithm-1].sort(data); v<;Md-<
} Jwp7gYZ
M2|is ~
public static interface Sort { CARzO7b\w
public void sort(int[] data); *=n:-
} l~.-e^p?
JRFtsio*
public static void swap(int[] data, int i, int j) { g>sSS8RO
int temp = data; z~Q)/d,Ac
data = data[j]; F?cK-.
data[j] = temp; }Lv;!
} DMS!a$4
} *H122njH+T