[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; |iI dm
} 3C<G8*4);/
int i1=l; BM/o7%]n
int i2=mid+1; l=b!O
for(int cur=l;cur<=r;cur++){ K"x_=^,Yu*
if(i1==mid+1) [@ev%x,
data[cur]=temp[i2++]; 8>t,n,k
else if(i2>r) p_g`f9q6D
data[cur]=temp[i1++]; b _<n]P*)
else if(temp[i1] data[cur]=temp[i1++]; 2QRO$NieV
else uDP:kM
data[cur]=temp[i2++]; :SS \2
} ) $_1U!z
} [gpO?'~
gHp*QL\?9
} F3EAjO)ch
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改进后的归并排序: :09NZ !!
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package org.rut.util.algorithm.support; 0F@~[W|2
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import org.rut.util.algorithm.SortUtil; _FYA? d}
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/** .whi0~i
* @author treeroot uE41"?GS
* @since 2006-2-2 In^mE(8YO
* @version 1.0 >7PQOQMW'
*/ H7GI`3o
public class ImprovedMergeSort implements SortUtil.Sort { [B#XA}w
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private static final int THRESHOLD = 10; mmbe.$73
@t~y9UfF
/* 7;o:r$08&}
* (non-Javadoc) mpug#i6q
* @b,H'WvhfS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E<Zf!!3
*/ P,ueLG=
public void sort(int[] data) { 953qz]Q8
int[] temp=new int[data.length]; vII{i
mergeSort(data,temp,0,data.length-1); U8Zb&6
} @k&6\1/U
XZb=;tYo
private void mergeSort(int[] data, int[] temp, int l, int r) { ["<Xh0_
int i, j, k; {#qUZ z-
int mid = (l + r) / 2; dazNwn
if (l == r) LNWS
return; "t&=~eOe3
if ((mid - l) >= THRESHOLD) -0d9,,c
mergeSort(data, temp, l, mid); eO <N/?t
else S(Afo`
insertSort(data, l, mid - l + 1); |E7J5ha
if ((r - mid) > THRESHOLD) qC> tni%
mergeSort(data, temp, mid + 1, r); Vo@7G@7K(
else U-9Aq
insertSort(data, mid + 1, r - mid); X|T|iB,vT
!xfDWbvHV
for (i = l; i <= mid; i++) { #\w N2`" W
temp = data; .Qx5,)@9
} M5ZH6X@5
for (j = 1; j <= r - mid; j++) { x.*^dM@V
temp[r - j + 1] = data[j + mid]; KsP2./N
} <E4(KE
int a = temp[l]; Tse#{
int b = temp[r]; GIM/T4!)
for (i = l, j = r, k = l; k <= r; k++) { q$:7j5E
if (a < b) { a#=d{/ab
data[k] = temp[i++]; Y7.+ Ma#|
a = temp; x 4+WZYv3
} else { |+q_kx@?l
data[k] = temp[j--]; qU!dg
b = temp[j]; ^A@f{g$KB+
} %xlpOR4
} ] #@:VR
} %NrH\v{7Q
?.SGn[
/** b!]O]dk#
* @param data (p[#[CI9
* @param l +d6onO{8
* @param i v1,#7sAW'
*/ N.JR($N$
private void insertSort(int[] data, int start, int len) { ?>h ~"D#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ChTq!W
} CW+kKN
} Iw`tbN L[
} .D 4G;=Q
} x"Ky_P~
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堆排序： ~a([e\~
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package org.rut.util.algorithm.support; zWC| Qe
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import org.rut.util.algorithm.SortUtil; lgaSIXDK
#"N60T@
/** eP@#I^_
* @author treeroot [=>=5'-
* @since 2006-2-2 _ p\L,No
* @version 1.0 YGo?%.X
*/ 4u:SE
public class HeapSort implements SortUtil.Sort{ }gkLO TJ/,
;d6Dm)/(
/* (non-Javadoc) 8gP1]xD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]3O&8,
*/ /*qRbN
public void sort(int[] data) { TmG);B}
MaxHeap h=new MaxHeap(); 7%Y`j/
h.init(data); +-j-)WU?,
for(int i=0;i h.remove(); V'&;r'#O
System.arraycopy(h.queue,1,data,0,data.length); &>zH.6%$
} YCbvCw$Ob
sG`x |%t
private static class MaxHeap{ X<L=*r^C,=
>9{?&#]x
void init(int[] data){ |SkQe[t
this.queue=new int[data.length+1]; OT 0c5x
for(int i=0;i queue[++size]=data; I_r@Y:5{
fixUp(size); Me.I>7c
} }3{eVct#|
} m.K cTM%j
9r?Z'~,Za
private int size=0; )dkU4]
VmqJMU>.
private int[] queue; qdix@@
Te-p0x?G.
public int get() { uyWheR
return queue[1]; [7vV#s3kJ
} Uj(0M;#%o+
62sl6WWS3
public void remove() { PQ4mNjXN
SortUtil.swap(queue,1,size--); RsZj
fixDown(1); ;ek*2Lh
} Y:!L
file://fixdown 2`4m"DtA
private void fixDown(int k) { FgH7YkKrD
int j; {XOl &
while ((j = k << 1) <= size) { i1B!oZ3q
if (j < size %26amp;%26amp; queue[j] j++; t1?aw<
if (queue[k]>queue[j]) file://不用交换 Z mJ<h&
break; n~ *|JJ*`
SortUtil.swap(queue,j,k); nQiZ6[L
k = j; ?8-Am[xH
} ;M3%t=KV
} ]>X_E%`G<b
private void fixUp(int k) { _9h$8(wjn
while (k > 1) { [J,.?'V
int j = k >> 1; no*)M7
if (queue[j]>queue[k]) ~&<#H+O
break; 4CM'I~
SortUtil.swap(queue,j,k); RCWmdR#}V
k = j; RNk|h
} 1{a%V$S[
} 4qid+ [B
8%9 C<+.R
} gA2Wo+\^bq
T`x|=}
} c2P}P* _
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SortUtil： (GC]=
UY(T>4H+h
package org.rut.util.algorithm; @"7S$@cO
bT,_=7F
import org.rut.util.algorithm.support.BubbleSort; PT~htG<Fw
import org.rut.util.algorithm.support.HeapSort; pkn^K+<n,
import org.rut.util.algorithm.support.ImprovedMergeSort; HA,o2jZ?In
import org.rut.util.algorithm.support.ImprovedQuickSort; ~XOmxz0
import org.rut.util.algorithm.support.InsertSort; v #+ECx
import org.rut.util.algorithm.support.MergeSort; tAv3+
import org.rut.util.algorithm.support.QuickSort; I\mF dE
import org.rut.util.algorithm.support.SelectionSort; ,Wlt[T(.;
import org.rut.util.algorithm.support.ShellSort; /JR+WmO
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/** j*.;6}\o
* @author treeroot a}UmD HS-
* @since 2006-2-2 Jy(G A
* @version 1.0 ,';|CGI cP
*/ {+J{t\`
public class SortUtil { PJ5}c!o[
public final static int INSERT = 1; 3]*Kz*i
public final static int BUBBLE = 2; ^FLs_=E
public final static int SELECTION = 3; tl0|.Q,
public final static int SHELL = 4; hE&6;3">
public final static int QUICK = 5; es)^^kGj6f
public final static int IMPROVED_QUICK = 6; tkj-.~@g0'
public final static int MERGE = 7; >. K
public final static int IMPROVED_MERGE = 8; >5FTBe[D
public final static int HEAP = 9; MfL7|b)
0/GBs~P
public static void sort(int[] data) { @lN\.O
sort(data, IMPROVED_QUICK); \W*L9azr
} t%}<S~"
private static String[] name={ R;OPY?EeW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e0`z~z]6&
}; hY&Yp^"}]^
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private static Sort[] impl=new Sort[]{ VVeJe"!t
new InsertSort(), uPfz'|,
new BubbleSort(), TE Z%|5(]
new SelectionSort(), F vkyp"W3
new ShellSort(), S`kOtZ_N n
new QuickSort(), Pxr/*X
new ImprovedQuickSort(), >PA*L(Dh%
new MergeSort(), 3F;C{P!
new ImprovedMergeSort(), G&*P*f1S
new HeapSort() 23?u_?+4i
}; nm5DNpHk
*V2;ds.~
public static String toString(int algorithm){ aj5HtP-
return name[algorithm-1]; d"FB+$
} G0 )[(s
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public static void sort(int[] data, int algorithm) { $S#Z>d*1!
impl[algorithm-1].sort(data); 4A2}3$c9
} \ptO4E
YmC}q20;
public static interface Sort { CP7Fe{P
public void sort(int[] data); 8B GZ
} <U3X4)r
@vl$[Z|
public static void swap(int[] data, int i, int j) { !8G)`'
int temp = data; &Gt{9#
data = data[j]; 5&n:i,
data[j] = temp; uRb48Qy2
} => (g_\
} R0Vt_7