[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; )D_#
} {%X /w'|
int i1=l; {rQ6IV3=
int i2=mid+1; [}q6bXM*
for(int cur=l;cur<=r;cur++){ ax0RtqtR&
if(i1==mid+1) (Em^qN
data[cur]=temp[i2++]; ^M6xRkI
else if(i2>r) >Pj ?IE6
data[cur]=temp[i1++]; ysm)B?+k
else if(temp[i1] data[cur]=temp[i1++]; /=&HunaxI
else O`1_eK~1<
data[cur]=temp[i2++]; ]+\;pb}bq
} 1^^<6e
} d?^bCf+<
2Sbo7e
} aal5d_Y
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改进后的归并排序: v MTWtc!6
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package org.rut.util.algorithm.support; kSoa'
$}RBK'cr}
import org.rut.util.algorithm.SortUtil; - `F#MN
c+$alwL~
/** TOmq2*,/
* @author treeroot GyQu?`
* @since 2006-2-2 Jk=E"I6
* @version 1.0 'oSs5lW
*/ k)j,~JH
public class ImprovedMergeSort implements SortUtil.Sort { F_0vh;Jo
`%_yRJd|;
private static final int THRESHOLD = 10; veX#K#
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/* Z9TmX A@
* (non-Javadoc) .`qw8e}y#'
* yop,%Fe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Vq_/g!?1
*/ ~5LlIpf36|
public void sort(int[] data) { 6$]@}O^V
int[] temp=new int[data.length]; {]Tb
mergeSort(data,temp,0,data.length-1); _Bh-*e2k
} T=Q"|S]V
l]tda(
private void mergeSort(int[] data, int[] temp, int l, int r) { j)?[S
int i, j, k; ^W!w~g+
int mid = (l + r) / 2; AmYqrmJ
if (l == r) P X/{
return; vzDoF0Ts*p
if ((mid - l) >= THRESHOLD) :: IAXGH)
mergeSort(data, temp, l, mid); ( -^-
else x?T.ItW:K
insertSort(data, l, mid - l + 1); +pDZ,c,
if ((r - mid) > THRESHOLD) NQb!?w
mergeSort(data, temp, mid + 1, r); e$!01Y$HI
else J3/2>N]/}
insertSort(data, mid + 1, r - mid); vb^/DMhz
tx0`#x
for (i = l; i <= mid; i++) { 7nr+X Os
temp = data; {|dU|h
} *\W *,D.I
for (j = 1; j <= r - mid; j++) { _19x`J3
temp[r - j + 1] = data[j + mid]; [fVtQ@-S!
} fd Vye|%
int a = temp[l]; S#gIfb<D
int b = temp[r]; Z?@1X`@
for (i = l, j = r, k = l; k <= r; k++) { W>jgsR79M
if (a < b) { B_Qi
data[k] = temp[i++]; 6k14xPj
a = temp; @|A wT
} else { kFCjko
data[k] = temp[j--]; [Ol}GvzJ7
b = temp[j]; i qLNX)
} (y^[k {#
} & QO9/!
} T2Duz,
V* :Q~ ^
/** VE_%/Fs,
* @param data H~fX>6>
* @param l f9`F~6$
* @param i /%O+]#$`0
*/ ;4E(n
private void insertSort(int[] data, int start, int len) { W=Y?_Oz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ChVur{jR
} BNA`Cc1VV
} M{sn{
} z xe6M~+
} Glz yFj
l;u_4`1H
堆排序： -wA^ao
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package org.rut.util.algorithm.support; <W$Ig@4[.d
]J`yh$a
import org.rut.util.algorithm.SortUtil; j?eWh#[K"
x{=@~c%eh
/** l8O12
* @author treeroot .tFMa:
* @since 2006-2-2 +i %,+3#6
* @version 1.0 \W^+aNbv=8
*/ D7'P^*4_B
public class HeapSort implements SortUtil.Sort{ ;c>Co:W
jg,oGtRz
/* (non-Javadoc) r$=YhI/=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $s[DT!8N
*/ Kzv*`
public void sort(int[] data) { qa|"kRCO
MaxHeap h=new MaxHeap(); x+mfQcSD&
h.init(data); ;JNI$DR
for(int i=0;i h.remove(); d{~5tv- H
System.arraycopy(h.queue,1,data,0,data.length); NrC(.*?m
} C^dnkuA
)JYt zc
private static class MaxHeap{ Y~R['u,
+N~?_5lv\s
void init(int[] data){ =K#12TRf
this.queue=new int[data.length+1]; e3|@H'~k
for(int i=0;i queue[++size]=data; ig] hY/uT
fixUp(size); h`1{tu
} Wa/&H$d\u@
} Iy2KOv@a5
=Wb!j18]
private int size=0; jl!rCOLt4
!!WSGZUR
private int[] queue; )v4?+$g
wZ^7#yX>
public int get() { }w,^]fC:
return queue[1]; wUd6xR
} !jV}sp<Xp
*2$I, ~(P
public void remove() { |.]:#)^X?
SortUtil.swap(queue,1,size--); x{$~u2|
fixDown(1); 6$d3Ap@Gl
} #U46Au
file://fixdown o0f{ePZ=
private void fixDown(int k) { xB%Felz
int j; GMY"*J<E
while ((j = k << 1) <= size) { K):MT[/"
if (j < size %26amp;%26amp; queue[j] j++; <>jut
if (queue[k]>queue[j]) file://不用交换 ~@3X&E0S
break; Bt8
SortUtil.swap(queue,j,k); -Qt>yzD3
k = j; (TQx3DGq
} HJ&|&tT
} ?q&*|-%)_d
private void fixUp(int k) { {}vB#!
while (k > 1) { 3c#CEuu
int j = k >> 1; -I#]#i@gX
if (queue[j]>queue[k]) pH?tr
break; QQ+?J~
SortUtil.swap(queue,j,k); uC_&?
k = j; :/Zy=F9:
} sCX 8
} RJ#xq#l
*3S./C}
} 6[-N})
rPK)=[MZ
} $"+ahS<?tC
G8m:]!
SortUtil： rtl|zCst
0?D`|x_
package org.rut.util.algorithm; \6UK:'5{
<i~MBy. (
import org.rut.util.algorithm.support.BubbleSort; 4X0k1Fw)Y
import org.rut.util.algorithm.support.HeapSort; @KM !g,f
import org.rut.util.algorithm.support.ImprovedMergeSort; W9!EjXg
import org.rut.util.algorithm.support.ImprovedQuickSort; =:T pH>f*
import org.rut.util.algorithm.support.InsertSort; 6cCC+*V{
import org.rut.util.algorithm.support.MergeSort; ryd*Ha">I
import org.rut.util.algorithm.support.QuickSort; s!\:%N
import org.rut.util.algorithm.support.SelectionSort; 4M) s
import org.rut.util.algorithm.support.ShellSort; {Z>OAR#
we<m%pf
/** TFX*kk&R
* @author treeroot hOI|#(-
* @since 2006-2-2 -}liG
* @version 1.0 "=7y6bM
*/ =.@{uu;
public class SortUtil { %R%e0|a
public final static int INSERT = 1; [B}$U|V0
public final static int BUBBLE = 2; :G&tM
public final static int SELECTION = 3; [L.+N@M
public final static int SHELL = 4; Z J:h]
public final static int QUICK = 5; sN6R0YW
public final static int IMPROVED_QUICK = 6; JLS|G?#0
public final static int MERGE = 7; nf,R+oX
public final static int IMPROVED_MERGE = 8; M.|@|If4?
public final static int HEAP = 9; +tbG^w%
!J3dlUFRO
public static void sort(int[] data) { +{Qk9Z
sort(data, IMPROVED_QUICK); 3h:"-{MW.
} LKCj@NdV
private static String[] name={ c/fU0cA@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lh0qB)>
}; Zt3"4d4
;pK/t=$
private static Sort[] impl=new Sort[]{ jf_xm=n
new InsertSort(), ![=C`O6K
new BubbleSort(), 89*txYmx
new SelectionSort(), w+QXSa_D
new ShellSort(), SE%B&8ZD
new QuickSort(), *v+xKy#M
new ImprovedQuickSort(), oPSucz&s
new MergeSort(), fq-zgqF<
new ImprovedMergeSort(), JI TQ3UL:W
new HeapSort() ~b.C[s
}; Gqe?CM
PuKT0*_ 7
public static String toString(int algorithm){ zGtWyXP
return name[algorithm-1]; cg16|
} &L&6y()G
F` /mcyf
public static void sort(int[] data, int algorithm) { H/qv%!/o
impl[algorithm-1].sort(data); Q\WH2CK
} XH9Y|FX%#
TqzL]'NS+
public static interface Sort { JQ-O=8]
public void sort(int[] data); j<H5i}
} >LvQ&fAo
P?- #d\qi
public static void swap(int[] data, int i, int j) { ={HYwP;
int temp = data; nnP]x [
data = data[j]; uBdS}U
data[j] = temp; _!vxX]
} z?ck*9SZX
} rA<>k/a