[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; $Kd>:f=A
} 3U}%2ARo_
int i1=l; HKeK<V
int i2=mid+1; BLFdHB.$T
for(int cur=l;cur<=r;cur++){ Lj7AZ|k
if(i1==mid+1) ^^Vg~){4
data[cur]=temp[i2++]; d_CT$
else if(i2>r) VaPG-n>Vf
data[cur]=temp[i1++]; eH,or,r
else if(temp[i1] data[cur]=temp[i1++]; A(XKyEx
else j1Ezf=N6`
data[cur]=temp[i2++]; 4z)]@:`}z
} ABkl%m6xf
} "jCu6Rjd
h`KU\X )A
} <naz+QK'
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改进后的归并排序: SWLo|)@[/
/@5YW"1
package org.rut.util.algorithm.support; 13f)&#, F
)}vl\7=
import org.rut.util.algorithm.SortUtil; P {'b:C
`_h&glMJ,q
/** [hsds\
* @author treeroot 8k79&|
* @since 2006-2-2 P~dcW
* @version 1.0 =u;MCQ[
*/ z%kULTL
public class ImprovedMergeSort implements SortUtil.Sort { !9x}
R-Sym8c
private static final int THRESHOLD = 10; >sbu<|]a 7
S>{~nOYt-`
/* =c7;r]Ol
* (non-Javadoc) n!(F, b
* /RF7j;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kVL.PY\K
*/ 7z-[f'EIUI
public void sort(int[] data) { pk~WrqK}
int[] temp=new int[data.length]; M=Wz
mergeSort(data,temp,0,data.length-1); TC"<g
} QW"! (`K
Pz^544\~ou
private void mergeSort(int[] data, int[] temp, int l, int r) { 4P0}+
int i, j, k; @ P|y{e6
int mid = (l + r) / 2; x"g&#Vq ~
if (l == r) Ss`LLq0LO
return; W!<U85-#S
if ((mid - l) >= THRESHOLD) j.YA2mr
mergeSort(data, temp, l, mid); s`UJ1eJ
else 28nFRr
insertSort(data, l, mid - l + 1); SAz
if ((r - mid) > THRESHOLD) OJxl<Q=z
mergeSort(data, temp, mid + 1, r); }\LQ3y"[
else F!do~Z
insertSort(data, mid + 1, r - mid); i9$ Av
D,6:EV"sa
for (i = l; i <= mid; i++) { snJ129}A
temp = data; 7o4\oRGV
} &wX]_:?
for (j = 1; j <= r - mid; j++) { cnLro
temp[r - j + 1] = data[j + mid]; 3CJwj
} KTv$
int a = temp[l]; -YE^zzh
int b = temp[r]; ;Qq\DFe.w
for (i = l, j = r, k = l; k <= r; k++) { ~5g~;f[4
if (a < b) { `{Ul!
data[k] = temp[i++]; 1Z;iV<d
a = temp; c9Yrw^
} else { 8_F1AU? u
data[k] = temp[j--]; <QvOs@i*
b = temp[j]; @8 6f
} OKV8zO
} 3sk9`=[{$
} $J2Gf(RU
n*$ g]G$
/** Je{ykL?N
* @param data :pUtSs7p}
* @param l Yw9GN2AG
* @param i ry!!9Z>9n
*/ _Y!IEAU/#
private void insertSort(int[] data, int start, int len) { y)pk6d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }M+7T\J!
} CWlw0X
} BzzTGWq\
} :Sma`U&
} g5yJfRLxp
]?*wbxU0
堆排序： 7 3m1
ceV}WN19l
package org.rut.util.algorithm.support; 4Up/p&1@
MJvp6n
import org.rut.util.algorithm.SortUtil; Vc2`b3"Br
Jb(H %NJ
/** nwWJ7M,A
* @author treeroot SdWV3
* @since 2006-2-2 &o*A{
* @version 1.0 l\mPHA23
*/ OYd !v`<
public class HeapSort implements SortUtil.Sort{ `]X>V,
+0~YP*I`/
/* (non-Javadoc) d5.4l&\u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pFXEu=$3
*/ 9my^Y9B
public void sort(int[] data) { yw!{MO
MaxHeap h=new MaxHeap(); ] @'!lhLi
h.init(data); xUvs:
for(int i=0;i h.remove(); 99S^f:t
System.arraycopy(h.queue,1,data,0,data.length); dscgj5b1~
} P%6~&woF
[~^0gAlQC
private static class MaxHeap{ <!+Az,-
T|p"0b A
void init(int[] data){ yZRzIb_
this.queue=new int[data.length+1]; N$DkX)Z
for(int i=0;i queue[++size]=data; VnzZTGs
fixUp(size); ^_6|X]tz1T
} /mMV{[
} Q@niNDaW2
g{Rd=1SK]
private int size=0; ;r8X.>P*
n ;Ei\\p!
private int[] queue; U17d>]ka
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public int get() { 7"##]m.
return queue[1]; Kgv T"s.
} %;/P&d/
?(PKeq6
public void remove() { g\U-VZ6;p
SortUtil.swap(queue,1,size--); -12U4h<e
fixDown(1); a}d@ T
} d1*<Ll9K
file://fixdown ebq4g387X
private void fixDown(int k) { nNm`Hfi
int j; 4W])}C%
while ((j = k << 1) <= size) { >7FHo-H/T
if (j < size %26amp;%26amp; queue[j] j++; N;d] 14|
if (queue[k]>queue[j]) file://不用交换 u y+pP!<
break; /{[o~:'p
SortUtil.swap(queue,j,k); 2/f}S?@
k = j; ; KA~Z5x;
} *#2h/Q.
} j+!v}*I![
private void fixUp(int k) { 9ati`-y2
while (k > 1) { ~[ F`"
int j = k >> 1; )1z@
if (queue[j]>queue[k]) pw#-_
break; @L`jk+Y0vF
SortUtil.swap(queue,j,k); K'xV;r7Nt
k = j; S@Y39
} 9$Y=orpWxr
} fOHxtHM
5N]"~w*
} 9^x> 3Bo
UBs4K*h|
} KXrjqqXs
i@q&5;%%
SortUtil： )_:NLo:
1cDF!X]
package org.rut.util.algorithm; ~rm_vo
}qUX=s GG
import org.rut.util.algorithm.support.BubbleSort; NRuNKl.v
import org.rut.util.algorithm.support.HeapSort; Fu~j8K
import org.rut.util.algorithm.support.ImprovedMergeSort; o4;(Zi#Z
import org.rut.util.algorithm.support.ImprovedQuickSort; g7|@
import org.rut.util.algorithm.support.InsertSort; uNyVf7u
import org.rut.util.algorithm.support.MergeSort; ni<(K 0~
import org.rut.util.algorithm.support.QuickSort; ~,Qp^"rlW
import org.rut.util.algorithm.support.SelectionSort; E$e5^G9
import org.rut.util.algorithm.support.ShellSort; fJ\[*5eiS
6b,V;#Anj
/** [;N'=]`
* @author treeroot NlqImM=r,
* @since 2006-2-2 >~f]_puT
* @version 1.0 d5b% W3
*/ N mG#
public class SortUtil { QPx^_jA
public final static int INSERT = 1; t-AmX)$
public final static int BUBBLE = 2; rOYx b }1
public final static int SELECTION = 3; "MsIjSu
public final static int SHELL = 4; _aphkeqd
public final static int QUICK = 5; xk5]^yDp
public final static int IMPROVED_QUICK = 6; jdN`mosJ
public final static int MERGE = 7; YUb_y^B^
public final static int IMPROVED_MERGE = 8; T|$H#n}
public final static int HEAP = 9; *a)n62
,6/V"kqIP
public static void sort(int[] data) { TC('H[ ]
sort(data, IMPROVED_QUICK); #mT"gs
} 5-V pJ
private static String[] name={ -LSWmrj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LeQjvW9y
}; "Q<MS'a
VTM/hJmwJ
private static Sort[] impl=new Sort[]{ FmW(CGs
new InsertSort(), W_=f'yb:E
new BubbleSort(), }bDm@NU
new SelectionSort(), bcyzhK=
new ShellSort(), 1 zZlC#V
new QuickSort(), ]5O~+Nf
new ImprovedQuickSort(), =]t|];c%
new MergeSort(), 0b>h$OU/
new ImprovedMergeSort(), Xvv6~
new HeapSort() =l6mL+C
}; _!6jR5&r,
f3;5Am
public static String toString(int algorithm){ >?b!QU*a
return name[algorithm-1]; #WuBL_nZ~
} u, ff>/1
s7<AfaJPF
public static void sort(int[] data, int algorithm) { #spCtZE
impl[algorithm-1].sort(data); | Iib|HQ)
} ^~dWU>
]d]]'Hk
public static interface Sort { dM5-;
public void sort(int[] data); ,}PgOJZ
} a#4?cEy
bOB\--:]
public static void swap(int[] data, int i, int j) { }EPY^VIw
int temp = data; [GR;?R5
data = data[j]; a[C@
data[j] = temp; KXy6Eno
} $`c:&
} 9Na$W:P c