[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; 6.#5Ra
} z!`aJE/
int i1=l; rl:6N*kK
int i2=mid+1; $D;/b+a
for(int cur=l;cur<=r;cur++){ ]QM{aSvXA
if(i1==mid+1) i'XW)n
data[cur]=temp[i2++]; N RB>X
else if(i2>r) _8zZ.~)
data[cur]=temp[i1++]; 2;8I0BH*'
else if(temp[i1] data[cur]=temp[i1++]; [l~Gwaul>
else GJTKqr|1O
data[cur]=temp[i2++]; >~%!#,C(|U
} $MW-c*5a
} _#f+@)vR
87&BF)]
} YdgDMd-1
W=QT-4
改进后的归并排序: vP k\b 3E
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package org.rut.util.algorithm.support; [\i0@
|76G#K~<X
import org.rut.util.algorithm.SortUtil; 6f=,$:S$
%K9pnq/T^
/** .kbo]P
* @author treeroot <]:X
* @since 2006-2-2 ,[gu7z^|
* @version 1.0 Z"ce1cB
*/ CdBsd
public class ImprovedMergeSort implements SortUtil.Sort { p~v rr 5
^)i5.o\
private static final int THRESHOLD = 10; K!AW8FnHkZ
8]G
/* U2hPsF4f
* (non-Javadoc) !V%h0OE\
* [u?*' c{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cx+w_D9b!
*/ _aJo7
public void sort(int[] data) { Z~X\Z.
int[] temp=new int[data.length]; fRcs@yZnS
mergeSort(data,temp,0,data.length-1); 2il)@&^
} %R|_o<(#MJ
3EY>XS
private void mergeSort(int[] data, int[] temp, int l, int r) { Re[x$rw
int i, j, k; So6ZNh9
int mid = (l + r) / 2; B|fh 4FNy
if (l == r) v d{`*|x
return; ;FQ<4PR$
if ((mid - l) >= THRESHOLD) k4HE'WY
mergeSort(data, temp, l, mid); S*aMUV&
else ,Wbr; zb
insertSort(data, l, mid - l + 1); 9`a1xnL
if ((r - mid) > THRESHOLD) Q4H(JD1f)
mergeSort(data, temp, mid + 1, r); h4iz(*
else Y5dt/8Jo
insertSort(data, mid + 1, r - mid); \OzPDN
,0pCc<
for (i = l; i <= mid; i++) { / 5\gP//9K
temp = data; 7O.?I# 76
} e7O9q8b
for (j = 1; j <= r - mid; j++) { MbT;]Bo
temp[r - j + 1] = data[j + mid]; p1BMQ?=($
} &EUI
int a = temp[l]; d O})#50f
int b = temp[r]; hRU5CH/!
for (i = l, j = r, k = l; k <= r; k++) { v47S9Vm+
if (a < b) { CjQ)Bu*4
data[k] = temp[i++]; "e-RV
a = temp; l-v(~u7
} else { `] fud{
data[k] = temp[j--]; qj.>4d
b = temp[j]; g+RgDt9
} 8*bEsc|
} /W|=Or2oR
} TA9Kg=_
vC [uEx:
/** S6d&w6
* @param data ,P>xpfdK
* @param l On`T pz/
* @param i 1(YEOZ
*/ hvFXYq_[O
private void insertSort(int[] data, int start, int len) { qN=l$_UD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Nn/f*GDvK
} ^ UDNp.6k
} u4KP;_,m
} ~K2.T7=
} IG(1h+5R(
pzcl@
堆排序： kq4ii`zi8
\3hj/
package org.rut.util.algorithm.support; *x<3=9V
?cB:1?\j
import org.rut.util.algorithm.SortUtil; + g*s%^(E
<Pnz$nH:e
/** pYBY"r
* @author treeroot <E&8g[x6
* @since 2006-2-2 llE_-M2gH
* @version 1.0 ]ZI ?U<0
*/ ^o8o
public class HeapSort implements SortUtil.Sort{ e[($rsx
*NjjFk=R
/* (non-Javadoc) CG0jZB#u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r7zS4;b
*/ w9aLTLv-
public void sort(int[] data) { n5U-D0/Q
MaxHeap h=new MaxHeap(); !7>~=n_,L.
h.init(data); 0|chRX
for(int i=0;i h.remove(); }od5kK;
System.arraycopy(h.queue,1,data,0,data.length); ' X9D(?O
} %>z)Q
lh]Q\
private static class MaxHeap{ -tH^Deo
GF/!@N
void init(int[] data){ Vb++K0CK
this.queue=new int[data.length+1]; +FBUB
for(int i=0;i queue[++size]=data; "q]r{0
fixUp(size); g;eoH
} h?-*SLT
} \s@7pM=(
84f~.45
private int size=0; 0_f6Qrcj
Q1 5h \!u
private int[] queue; it)!-[:bm
5faY{;8
public int get() { Tya[6b!8
return queue[1]; XIRvIwO
} Ls2g#+
"/g\?Nce
public void remove() { DlF6tcoI
SortUtil.swap(queue,1,size--); 5<77o|
fixDown(1); KM9)
} $gPR3*0
file://fixdown ',l}$]y5
private void fixDown(int k) { 40m>~I^q}
int j; -RBH5+SS2
while ((j = k << 1) <= size) { vwIP8z~<
if (j < size %26amp;%26amp; queue[j] j++; +\s&v!
if (queue[k]>queue[j]) file://不用交换 mGC!7^_D`
break; d+L!s7
SortUtil.swap(queue,j,k); QT)5-Jy
k = j; EHlkt,h*
} W&s@2y?rF
} wqE+hKs,
private void fixUp(int k) { qgkC)
while (k > 1) { ;hZ^zL
int j = k >> 1; N6<G`k,
if (queue[j]>queue[k]) P^-daRb
break; di|5|bn7
SortUtil.swap(queue,j,k); m[$pj~<\
k = j; %<yH6h*u
} }HLV'^"k
} )Q5ja}-{V
UC*\3:>'n
} l}&&f8n
zcCGREe=
} oeA}b-Ct0
Jf3xK"in
SortUtil： @q++eGm\Q
c W^
package org.rut.util.algorithm; _@A%t&l
H+?@LPV*N
import org.rut.util.algorithm.support.BubbleSort; ykBq?Vr
import org.rut.util.algorithm.support.HeapSort; h/xV;oj
import org.rut.util.algorithm.support.ImprovedMergeSort; Kn`-5{1B|
import org.rut.util.algorithm.support.ImprovedQuickSort; 586lN22xM
import org.rut.util.algorithm.support.InsertSort; q6AL}9]9
import org.rut.util.algorithm.support.MergeSort; t +h}hL
import org.rut.util.algorithm.support.QuickSort; )Q)H!yin
import org.rut.util.algorithm.support.SelectionSort; bSm*/Q
import org.rut.util.algorithm.support.ShellSort; yN:U"]glC
4&}dA^F
/** ZB'ms[
* @author treeroot S*Hv2sl
* @since 2006-2-2 KlSg0s
* @version 1.0 Yue#
*/ Sc,ajT
public class SortUtil { 3c[< #]8S
public final static int INSERT = 1; -,pw[R
public final static int BUBBLE = 2; Y8@TY?
public final static int SELECTION = 3; gK",D^6T*Y
public final static int SHELL = 4; f@aFs]xV
public final static int QUICK = 5; GI[XcK^*w
public final static int IMPROVED_QUICK = 6; `\M}~
public final static int MERGE = 7; aC,?FWm
public final static int IMPROVED_MERGE = 8; ,4Qct=%L_
public final static int HEAP = 9; .:A&5Y-
h%+6y
public static void sort(int[] data) { O]-s(8Oo3
sort(data, IMPROVED_QUICK); x!;;;iS
} $Y=xu2u)
private static String[] name={ 5"^Z7+6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [e?vqm .
}; y#?AW`|
6[S-%|f
private static Sort[] impl=new Sort[]{ |L%d^m
new InsertSort(), mj|TWDcj+
new BubbleSort(), >O/1Lpl.3
new SelectionSort(), %P HYJc
new ShellSort(), %?i~`0-:n%
new QuickSort(), BU=;rz!;
new ImprovedQuickSort(), ZO\x|E!b
new MergeSort(), ~ "stI
new ImprovedMergeSort(), ]Z=O+7(r
new HeapSort() ! ~3zp L
}; "S^""5
g$9EI\a
public static String toString(int algorithm){ %Z!3[.%F
return name[algorithm-1]; Gcp!"y=i
} "D[/o8Hk
/A"UV\H`f
public static void sort(int[] data, int algorithm) { bd[%=5
impl[algorithm-1].sort(data); uj^l&"
} df@G+v0_1
atYe$Db
public static interface Sort { m=Fk
public void sort(int[] data); XTS%:S
} ?A2jj`N1x
M)Z3q
public static void swap(int[] data, int i, int j) { ]^BgSC
int temp = data; &N|`Q(QXS
data = data[j]; {"n=t`E)3
data[j] = temp; &KPJB"0L
} aZB$%#'vR
} o@W:PmKW