[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; K8/jfm
} ~|[i64V<^
int i1=l; qpQiMiB#g'
int i2=mid+1; r0wAh/J|
for(int cur=l;cur<=r;cur++){ M6ZXq6J
if(i1==mid+1) ._]*Y`5)d
data[cur]=temp[i2++]; Lf:#koaC
else if(i2>r) od$$g(
data[cur]=temp[i1++]; <`WDNi$Y
else if(temp[i1] data[cur]=temp[i1++]; _R^ZXtypd
else g:.LCF
data[cur]=temp[i2++]; G5|'uKz2"
} \PD%=~
} #]QS
s1R#X~d
} Ga+Cb2$
bxPJ5oT
改进后的归并排序: l*(L"]
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package org.rut.util.algorithm.support; G*=&yx."E
AHMvh 7O?
import org.rut.util.algorithm.SortUtil; ~;-2eKw
7Le-f
/** Lr20xm
* @author treeroot %__ @G_M
* @since 2006-2-2 elR1NhB|p
* @version 1.0 mML B?I
*/ j+>[~c;0)
public class ImprovedMergeSort implements SortUtil.Sort { qY!LzKM0
:#\jx
private static final int THRESHOLD = 10; Lctp=X4
6kMEm)YjT
/* oKr= ]p
* (non-Javadoc) _dECAk &b
* C8i4z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aK(e%Ed t"
*/ ADM!4L(s4}
public void sort(int[] data) { ~}/_QlX` K
int[] temp=new int[data.length]; B qINU
mergeSort(data,temp,0,data.length-1); 1NG[
} <IBUl}|\
1FG"Ak}D
private void mergeSort(int[] data, int[] temp, int l, int r) { zsj]WP6j
int i, j, k; -;;m/QM
int mid = (l + r) / 2; Q<DXDvL
if (l == r) Q/J<$W*,
return; xT( pB-R
if ((mid - l) >= THRESHOLD) Z2-tDp(I
mergeSort(data, temp, l, mid); ~OLyG$JJ
else *v: .]_;
insertSort(data, l, mid - l + 1); 0'Qvis[kt
if ((r - mid) > THRESHOLD) _mQj=
mergeSort(data, temp, mid + 1, r); D51s)?
else 4/_!F'j
insertSort(data, mid + 1, r - mid); FW)~e*@8=
a<]vHC7
for (i = l; i <= mid; i++) { (WP^}V5
temp = data; Jh36NE8r
} **oDQwW]*
for (j = 1; j <= r - mid; j++) { w_;$ahsu~
temp[r - j + 1] = data[j + mid]; ~ 588md :
} c>T)Rc
int a = temp[l]; Y4lNxvY
int b = temp[r]; &T ^bv*P
for (i = l, j = r, k = l; k <= r; k++) { A;6ew4
if (a < b) { (dx~lMI
data[k] = temp[i++]; >5TXLOYZ
a = temp; ^4p$@5zH
} else { ~]9EhC'l
data[k] = temp[j--]; 0QW;=@)d
b = temp[j]; Ls3r( Tf
} rJB/)4 mE
} k'sPA_|
} -a"b:Q
O%aHQL%Sz
/** gR_Exs'K
* @param data b`Jsu!?{
* @param l aWP9i&
* @param i p;D {?H/
*/ aZ|S$-}
private void insertSort(int[] data, int start, int len) { RMid}BRE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SLH;iqPT
} Gv[(0
} u6:$AA
} {Q`Q2'@
} G,1g~h%I$
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堆排序： 92N`Q}
LY#V)f
package org.rut.util.algorithm.support; v0bP|h[t
M6V^ur 1
import org.rut.util.algorithm.SortUtil; 64<*\z_
znIS2{p/`
/** [o7Qr?RN
* @author treeroot |0X~D}r|J
* @since 2006-2-2 WD*z..`
* @version 1.0 M!%|IKw
*/ vTWm_ed+^
public class HeapSort implements SortUtil.Sort{ |1e//*
^7t1'A8e<
/* (non-Javadoc) EN8xn9M?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?V(+Cc
*/ >McEuoZx9
public void sort(int[] data) { vWL|vR
MaxHeap h=new MaxHeap(); ~8-xj6^
h.init(data); .&8a ;Q?c
for(int i=0;i h.remove(); `joyHKZI.
System.arraycopy(h.queue,1,data,0,data.length); {K:]dO
} QHnC(b
'tjqfR
private static class MaxHeap{ a(G}<
"3_GFq
void init(int[] data){ kE[R9RS!
this.queue=new int[data.length+1]; Pa$"c?QUy
for(int i=0;i queue[++size]=data; #3A|Z=,5
fixUp(size); "g!ek3w(
} .SNg2.
} x,fL656t
[ A 7{}
private int size=0; M)H*$!x}>
MN:LL <
private int[] queue; _c}# f\ +_
y'non0P.
public int get() { %'S[f
return queue[1]; -D%mVe)&+
} e_cK#9+
rFp>A`TJ
public void remove() { BPVOBL@
SortUtil.swap(queue,1,size--); . lNf.x#u
fixDown(1); k~fH:X~x
} e{*yV#Wl
file://fixdown oa`7ClzD
private void fixDown(int k) { ViG>gMGv
int j; Jje!*?&8X
while ((j = k << 1) <= size) { $ ?|;w,%I
if (j < size %26amp;%26amp; queue[j] j++; z*9 ke
if (queue[k]>queue[j]) file://不用交换 2^f7GP
break; H5o=nWQ6e
SortUtil.swap(queue,j,k); !fjB oK+
k = j; o^r\7g6\
} 9`M7 -{
} J"TF@7{p
private void fixUp(int k) { tJ&tNSjTi
while (k > 1) { w6pXF5ur>
int j = k >> 1; >2X-98,
if (queue[j]>queue[k]) <;Tr
break; ;mPX8bT
SortUtil.swap(queue,j,k); ,J:Ro N_:
k = j; EBr?>hl
} Fh|{ib
} {-%8RSK=<
hVui.]
} &y(%d 7@/
'K#ndCGJ$
} 2waPNb|
ydAiH*>
SortUtil： 7+qKA1t^
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package org.rut.util.algorithm; ?-)v{4{s
&So1;RR,_M
import org.rut.util.algorithm.support.BubbleSort; dP`B9>r
import org.rut.util.algorithm.support.HeapSort; dlIYzO<
import org.rut.util.algorithm.support.ImprovedMergeSort; <XN=v!2;
import org.rut.util.algorithm.support.ImprovedQuickSort; VKf&}u/
import org.rut.util.algorithm.support.InsertSort; Q|e-)FS)
import org.rut.util.algorithm.support.MergeSort; a,r B7aD
import org.rut.util.algorithm.support.QuickSort; 8_"NF%%(n
import org.rut.util.algorithm.support.SelectionSort; +_+j"BT
import org.rut.util.algorithm.support.ShellSort; d`=LZio
=|8hG*D8
/** NRgVNE
* @author treeroot "F6gV;{Bt
* @since 2006-2-2 > >KCd
* @version 1.0 S4'<kF0z
*/ euVj,m
public class SortUtil { y*6/VSRkt4
public final static int INSERT = 1; ]}p<P):hO
public final static int BUBBLE = 2; 't5`Ni
public final static int SELECTION = 3; lW|v_oP9
public final static int SHELL = 4; Z!7xRy
public final static int QUICK = 5; JodD6;P
public final static int IMPROVED_QUICK = 6; h72CGA|
public final static int MERGE = 7; $*T?}r>
public final static int IMPROVED_MERGE = 8; | L1+7
public final static int HEAP = 9; $EX(-!c
c&FOt
public static void sort(int[] data) { ]V_A4Df
sort(data, IMPROVED_QUICK); RZ;s_16GQ
} c?u*,d) G
private static String[] name={ S(?A3 H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B?- poB&
}; u6Lx3
=:]v~Ehq
private static Sort[] impl=new Sort[]{ %.?V\l
new InsertSort(), ??U/Qi180
new BubbleSort(), aWJj@',_
new SelectionSort(), |_>^vW1f
new ShellSort(), Y#tur`N
new QuickSort(), Q2uV/M1?
new ImprovedQuickSort(), B4wRwrVI>
new MergeSort(), Y[dq"
new ImprovedMergeSort(), $LFL4Q
new HeapSort() R&J?XQ
}; ovBmo2W/
;R[3nb9%
public static String toString(int algorithm){ O#^H.B
return name[algorithm-1]; upL3M`
} _#s,$K#
mbGma
public static void sort(int[] data, int algorithm) { qq]Iy=
impl[algorithm-1].sort(data); j)6p>6
} % hvK;B?Y|
5<R m{
public static interface Sort { W ';X4e
public void sort(int[] data); 3m`>D e
} )AQ^PBwp
c$%*p (zY
public static void swap(int[] data, int i, int j) { $[n:IDa*@1
int temp = data; hW<v5!,
data = data[j]; uMS+,dXy
data[j] = temp; Cl]?qH*:
} '.(Gg%*\.
} v/.'st2%