[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; 9t o2V
} }4wIfI83K,
int i1=l; KXbD7N.
int i2=mid+1; t7qzAr
for(int cur=l;cur<=r;cur++){ 82A[[^`
if(i1==mid+1) RZ GD5`n
data[cur]=temp[i2++]; XpoEZ|0
else if(i2>r) CvB)+>oa
data[cur]=temp[i1++]; X@up=%(
else if(temp[i1] data[cur]=temp[i1++]; U!Eo*?LU$
else .|x"'3#
data[cur]=temp[i2++]; xe9V'wICp(
} #Oq~ZV|<l
} PBY^m+
mYw9lM
} Z9k"&F~u}
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改进后的归并排序: :+$/B N:iO
EViQB.3w\
package org.rut.util.algorithm.support; ?*: mR|=
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import org.rut.util.algorithm.SortUtil; O[v(kH'
;@lC08SE
/** I%gDqfdL
* @author treeroot GZk{tTv
* @since 2006-2-2 qTi%].F"G
* @version 1.0 .C?rToCY
*/ 9w08)2$Na
public class ImprovedMergeSort implements SortUtil.Sort { VKb'!Ystl
i)mQ?Y#o
private static final int THRESHOLD = 10; \*.u(8~2o
$zYo~5M?i-
/* SED_^
* (non-Javadoc) d;WXlE;
* z57|9$h}w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >4x~US[VB
*/ ,V{Cy`bi
public void sort(int[] data) { ;+Uc}=
int[] temp=new int[data.length]; ua HB\Uc
mergeSort(data,temp,0,data.length-1); *hZ{>
} R@Bnrk
sH`(y)`_
private void mergeSort(int[] data, int[] temp, int l, int r) { jI~GRk
int i, j, k; Sz3Tp5b
int mid = (l + r) / 2; EL+P,q/b
if (l == r) kNDN<L
return; -eSZpzp
if ((mid - l) >= THRESHOLD) 0gOB$W
mergeSort(data, temp, l, mid); ';.n#
else iqh"sx{5bp
insertSort(data, l, mid - l + 1); z*BGaSX %
if ((r - mid) > THRESHOLD) !3T,{:gyrI
mergeSort(data, temp, mid + 1, r); O0cKmh6=
else t)h{ w"v
insertSort(data, mid + 1, r - mid); )EptyH
g_2EH
for (i = l; i <= mid; i++) { \V/;i.ng
temp = data; />[X k
} 7PG|e#
for (j = 1; j <= r - mid; j++) { G$_=rHt_%
temp[r - j + 1] = data[j + mid]; 6p1)wf.J
} "+GKU)
int a = temp[l]; vhot-rBN
int b = temp[r]; ?)i`)mu'
for (i = l, j = r, k = l; k <= r; k++) { ed6eC8@
if (a < b) { &R~)/y0]
data[k] = temp[i++]; \CDzVO0^
a = temp; t9(sSl
} else { 5U5)$K'OA
data[k] = temp[j--]; -&3mOn& (1
b = temp[j]; =abBD
} zy!mP
} ;0 No@G;z
} _hbTxyj
qsTB)RdjP%
/** bi 8Qbo4
* @param data }6#u}^gy
* @param l .6xIg+
* @param i 6Lhfb\2?
*/ cc_v4d{x
private void insertSort(int[] data, int start, int len) { gHe%N?'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QGI_aU
} E,g5[s@
} 7m+d;x2
} F4`5z)<*
} ]f<H?
%tC3@S
堆排序： ;;;{<GEQ
#mK?K
package org.rut.util.algorithm.support; hfQx$cv6
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import org.rut.util.algorithm.SortUtil; 4(O;lVT}
s_`=ugue
/** k5ZkD+0Jo
* @author treeroot `SH#t3 5,
* @since 2006-2-2 oM4Q_An
* @version 1.0 >L{s[pLJ
*/ _}RzJKl@
public class HeapSort implements SortUtil.Sort{ =i:6&Y~VGq
J0Ik@
/* (non-Javadoc) t3b64J[A{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UI}df<Ge
*/ ~|t7
public void sort(int[] data) { ^N`bA8
MaxHeap h=new MaxHeap(); ZlxJY%oeu
h.init(data); s1| +LT,D
for(int i=0;i h.remove(); r"uOf;m
System.arraycopy(h.queue,1,data,0,data.length); X5`#da
} cm!|A)~
<!qv$3/7
private static class MaxHeap{ 4_'($FC1
2&Hn%q)
void init(int[] data){ +o7Np|Ou
this.queue=new int[data.length+1]; 7UzbS,$x
for(int i=0;i queue[++size]=data; X'W8 mqk
fixUp(size); eO?.8OM-a
} 5C&]YT3)
} A0>u9Bn"Qw
eYD|`)-f<^
private int size=0; `3KXWN`.s
_T)G?iv:&
private int[] queue; 2A^>>Q/,u
\vR&-+8dk
public int get() { +o94w^'^$b
return queue[1]; Z F&aV?
} a&*fk?o
43p0k&;-7
public void remove() { f3u^:6U~
SortUtil.swap(queue,1,size--); M*x1{g C/
fixDown(1); Ous_269cM
} UNB'Xjp}@
file://fixdown !0+!%Nr>J
private void fixDown(int k) { {vL4:K
int j; Ka$YKY,
while ((j = k << 1) <= size) { [EX@I =?
if (j < size %26amp;%26amp; queue[j] j++; /v^1/i
if (queue[k]>queue[j]) file://不用交换 Aa#WhF
break; ;Fi(zl
SortUtil.swap(queue,j,k); ^Cm9[1p
k = j; 2kS]:4)T
} ARt+"[.*p
} OB{d^e}
private void fixUp(int k) { j(*ZPo>oD
while (k > 1) { Gj%cU@2
int j = k >> 1; 2V*<HlqOif
if (queue[j]>queue[k]) RIDzNdM>U
break; }hPFd
SortUtil.swap(queue,j,k); $B3<"
k = j; |9X$@R
} I2R" Y<
} G?t<4MTv
yK #9)W-
} jhN]1t/\X
:@H&v%h(u
} ",hPy[k
5[py{Gq
SortUtil： Qq.ht
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package org.rut.util.algorithm; NLz[F`I
E>}(r%B
import org.rut.util.algorithm.support.BubbleSort; +oT/v3,
import org.rut.util.algorithm.support.HeapSort; PqOPRf
import org.rut.util.algorithm.support.ImprovedMergeSort; 4%(\y"T
import org.rut.util.algorithm.support.ImprovedQuickSort; [A.ix}3mm
import org.rut.util.algorithm.support.InsertSort; scsN2#D7U/
import org.rut.util.algorithm.support.MergeSort; I!L`W _
import org.rut.util.algorithm.support.QuickSort; _+vE(:T
import org.rut.util.algorithm.support.SelectionSort; >5aZ?#TS1
import org.rut.util.algorithm.support.ShellSort; VW[!%<
2qF ?%
/** R2 I 7d'|v
* @author treeroot <Xsy{7
* @since 2006-2-2 {H5a.+-(bE
* @version 1.0 ?C[W~m P
*/ =@%Ukrd@
public class SortUtil { (zO)J`z>
public final static int INSERT = 1; ~KW|<n4m
public final static int BUBBLE = 2; k\qF> =
public final static int SELECTION = 3; )M!6y%b67
public final static int SHELL = 4; :U}.
public final static int QUICK = 5; :&{:$-h!
public final static int IMPROVED_QUICK = 6; _=wu>h&7
public final static int MERGE = 7; [vJLj>@
public final static int IMPROVED_MERGE = 8; I)B+h8l72<
public final static int HEAP = 9; K>tubLYh
"\x<Zg;
public static void sort(int[] data) { #'@pL0dj
sort(data, IMPROVED_QUICK); 8{t^< j$n
} zree}VqD;5
private static String[] name={ fnwhkL#8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~q.a<B`,t
}; 9uNkd2#
L>&o_bzp
private static Sort[] impl=new Sort[]{ Qrnc;H9)
new InsertSort(), !Rq.L
new BubbleSort(), 1TagQ
new SelectionSort(), <yw6Om:n<
new ShellSort(), xE2sb*
new QuickSort(), &RzkM4"
new ImprovedQuickSort(), WB7pdSZ
new MergeSort(), xnfMx$fD
new ImprovedMergeSort(), u?J!3ZEtb
new HeapSort() nkp,
}; 5 +Ei!E89
us,!U
public static String toString(int algorithm){ *u i!|;
return name[algorithm-1]; v*.[O/,EBR
} JjXuy7XQ
3u)NkS=
public static void sort(int[] data, int algorithm) { rY~!hZ
impl[algorithm-1].sort(data); ,#u"$Hz8p
} _DlX F
>;$C@
public static interface Sort { cILI%W1
public void sort(int[] data); A*$JF>`7
} j;GH|22
vpS&w
public static void swap(int[] data, int i, int j) { f6I$d<
int temp = data; *v' d1.Z
data = data[j]; @Nm;lZK
data[j] = temp; kXfTNMb
} Q1A_hW2x
} Z4^O`yS9+