[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; Pa */&WeB
} ~A-D>.ZH
int i1=l; fnn/akGKI
int i2=mid+1; ;g_<i_*x#
for(int cur=l;cur<=r;cur++){ 7SjWofv
if(i1==mid+1) `r*bG=
data[cur]=temp[i2++]; ] F2{:RW
else if(i2>r) ]McDN[h:
data[cur]=temp[i1++]; N3?hu}
else if(temp[i1] data[cur]=temp[i1++]; #~6au6LMC
else 5U<;6s
data[cur]=temp[i2++]; \mDBOC0eK
} BVv{:m{w
} '"J``=
RV_+-m{]
} i" >kF@]c8
=J^FV_1rJ
改进后的归并排序: v42Z&PO
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package org.rut.util.algorithm.support; d`4F
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import org.rut.util.algorithm.SortUtil; \Culf'iX
.@3bz
/** aYcc2N%C
* @author treeroot :U/x(
* @since 2006-2-2 i E)Fo.H
* @version 1.0 Q a3+9
*/ D@o8Gerq~
public class ImprovedMergeSort implements SortUtil.Sort { YB"=eld
\Qei}5P,
private static final int THRESHOLD = 10; z-?WU
c_FnJ_++f
/* & _mp!&5XV
* (non-Javadoc) 7aJ:kumDZ
* UGK,+FN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oE'Flc.
*/ =x}p>#o,J
public void sort(int[] data) { Qi\"b
int[] temp=new int[data.length]; )UAkg
mergeSort(data,temp,0,data.length-1); ZA'Qw2fF0
} ZMmf!cKY:'
d@>1m:p
private void mergeSort(int[] data, int[] temp, int l, int r) { 0'~Iv\s
int i, j, k; g0A,VX:2
int mid = (l + r) / 2; 0M5m8
if (l == r) Q7XlFjzcm
return; {V5eHn9/Q'
if ((mid - l) >= THRESHOLD) <,I]=+A
mergeSort(data, temp, l, mid); s:Io5C(
else D~7L~Q]xI
insertSort(data, l, mid - l + 1); +/DT#}JE
if ((r - mid) > THRESHOLD) < <]uniZ\
mergeSort(data, temp, mid + 1, r); +l(lpp>,
else Y@Ti2bI`v
insertSort(data, mid + 1, r - mid); B%/N{i*Z
W,ik ;P\
for (i = l; i <= mid; i++) { f%Vdao[
temp = data; ?$0t @E
} oO][X
for (j = 1; j <= r - mid; j++) { >PoVK{&y
temp[r - j + 1] = data[j + mid]; d^ZrI\AJ
} G~KYFNHr
int a = temp[l]; {x<yDDIv_
int b = temp[r]; )m.U"giG++
for (i = l, j = r, k = l; k <= r; k++) { Wd]MwDcO
if (a < b) { A7=k9|
data[k] = temp[i++]; R>dd#`r"
a = temp; &~#y-o"
} else { i'`[dwfS
data[k] = temp[j--]; EN{o3@ O'
b = temp[j]; CCU<t Q
} _68{ {.
} z 3N'Xk
} =Bw2{]w
(V9 ;
/** y$U(oIU>
* @param data t$-!1jq
* @param l 5;q{9wvqO
* @param i B8.uzX'p
*/ V3q[#.o
private void insertSort(int[] data, int start, int len) { $&jte_hv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^Rc*X'Iz(!
} [ %6(1$Ih
} C5x*t Q|
} ^s_7-p])(
} 9q_c`
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堆排序： QI*<MF,1
OS sYmF
package org.rut.util.algorithm.support; dBEm7.nh
aDZ]{;
import org.rut.util.algorithm.SortUtil; {W$K@vuV;?
,f^ICM
/** osZ]R
* @author treeroot ?z0N-A2C2
* @since 2006-2-2 LZ<^b6Dxk
* @version 1.0 /a?qtRw
*/ hD9b2KZv
public class HeapSort implements SortUtil.Sort{ J+r:7NvZ
+a0` ,Jc
/* (non-Javadoc) #dDM "s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lGpci
*/ _kT{W]
public void sort(int[] data) { RJOW#e :
MaxHeap h=new MaxHeap(); p,7, tx
h.init(data); t$g@+1p4
for(int i=0;i h.remove(); 3 @%XR8ss
System.arraycopy(h.queue,1,data,0,data.length); <d~si^*\ch
} ?tx."MZ
j9~lf
private static class MaxHeap{ ]Gf`nJDV
*cAI gO7
void init(int[] data){ D`3`5.b
this.queue=new int[data.length+1]; do:IkjU~
for(int i=0;i queue[++size]=data; )W*A[c 2
fixUp(size); ZY=a[K
} qylI/,y{
} vp(ow]Q
,-[z?dvO
private int size=0; T,h9xl9i
f"SK3hI$p
private int[] queue; @7K(_Wd
'8=/v*j>?
public int get() { + f,Kt9Cy
return queue[1]; i>e?$H,/
} <nc6&+
iTVZo?lVo
public void remove() { w|c200Is}e
SortUtil.swap(queue,1,size--); fwNj@fl_,e
fixDown(1); LB`{35b-
} (dTQ,0
file://fixdown **JBZ\'
private void fixDown(int k) { =YY 7V!
int j; %`*On~
while ((j = k << 1) <= size) { [Qcht,\^v
if (j < size %26amp;%26amp; queue[j] j++; Ll.P>LH
if (queue[k]>queue[j]) file://不用交换 ty'/i!/\
break; HI7w@V8Ed
SortUtil.swap(queue,j,k); e~7FK_y#0
k = j; 8Qhj_
} .wB'"z8L
} ")<5VtV
private void fixUp(int k) { ,Oe:SZJ>
while (k > 1) { :kFPPx?
int j = k >> 1; >wb Uxl%{5
if (queue[j]>queue[k]) N'i)s{'
break; [iZH[7&j
SortUtil.swap(queue,j,k); DLuaM?7
k = j; dz!m8D0
} W4UK?#S+
} {@6:kkd
sNM ]bei
} ~d\^ynQ
t YxN^VqU
} O_]hbXV0
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SortUtil： &gKDw!al
a~ dgf:e`
package org.rut.util.algorithm; > l]Ble
7ug"SV6Hb
import org.rut.util.algorithm.support.BubbleSort; 05g %5vHF
import org.rut.util.algorithm.support.HeapSort; p6V#!5Q
import org.rut.util.algorithm.support.ImprovedMergeSort; d::9,~
import org.rut.util.algorithm.support.ImprovedQuickSort; YxrMr9>l1
import org.rut.util.algorithm.support.InsertSort; ` FOCX;
import org.rut.util.algorithm.support.MergeSort; 4XAs^>N+
import org.rut.util.algorithm.support.QuickSort; V0BT./ B\<
import org.rut.util.algorithm.support.SelectionSort; <ZheWl
import org.rut.util.algorithm.support.ShellSort; hz*T"HJ]t
lv9Tq5C
/** JOJuGB-d
* @author treeroot fp*6Dv_
* @since 2006-2-2 [$;cjys
* @version 1.0 1\~I "$}
*/ < Sgc6>)
public class SortUtil { ~(8fUob
public final static int INSERT = 1; HNCu:$Wr@
public final static int BUBBLE = 2; KJ:z\N8eo
public final static int SELECTION = 3; n_Qua|R
public final static int SHELL = 4; qYJ<I'Ux O
public final static int QUICK = 5; /QWXEL/M=
public final static int IMPROVED_QUICK = 6; |'z24 :8
public final static int MERGE = 7; 1y\bJ
public final static int IMPROVED_MERGE = 8; 1YQYZ^11
public final static int HEAP = 9; AwjXY,2
ZuybjV1/f6
public static void sort(int[] data) { j#~~_VA~
sort(data, IMPROVED_QUICK); /Ry%K4$
} )z\#
private static String[] name={ c BZ,"kp-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xdx8HB@L
}; @&Z^WN,x
: NA(nA 3
private static Sort[] impl=new Sort[]{ w^Yo)"6
new InsertSort(), qxDMDMN
new BubbleSort(), =yz"xWH
new SelectionSort(), KE ?NQMU
new ShellSort(), >$TvCw
new QuickSort(), &l3(+4Sh
new ImprovedQuickSort(), Z|Oq7wzEH
new MergeSort(), tsL ; wT_
new ImprovedMergeSort(), vi *A5
new HeapSort() 2|=hF9
}; |Y05 *!\P*
%~x?C4L8
public static String toString(int algorithm){ kl]MP}wc
return name[algorithm-1]; rR :ZTfJs"
} )WbWp4
J@2wPKh?Yp
public static void sort(int[] data, int algorithm) { @fYVlHT%E
impl[algorithm-1].sort(data); nH&z4-1Y?
} :ujpLIjvVG
IHdA2d?.]
public static interface Sort { h?p_jI
public void sort(int[] data); ^h$*7u"^y
} {'tfU
+^+'.xQ
public static void swap(int[] data, int i, int j) { x<M::")5!V
int temp = data; n)"JMzjQ<
data = data[j]; F0p=|W
data[j] = temp; 6T'UWh0S
} lQ`=PFh
} n}.e(z_"