[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; B#V4
} iRr&'k
int i1=l; M6>\R$
int i2=mid+1; /-<m(72wF
for(int cur=l;cur<=r;cur++){ n*8RYm)?
if(i1==mid+1) Dm`U|<o
data[cur]=temp[i2++]; 0_xcrM
else if(i2>r) bU +eJU_%
data[cur]=temp[i1++]; J;]@?(
else if(temp[i1] data[cur]=temp[i1++]; NB6h/0*v
else #L*@~M^]
data[cur]=temp[i2++]; H fmMf^c
} BrH`:Dw
} }Us$y0W\
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} x`|tT%q@l
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改进后的归并排序: uC8T!z
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package org.rut.util.algorithm.support; (j8,n<o
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import org.rut.util.algorithm.SortUtil; D@vvy6>~s
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/** Chi<)P$^
* @author treeroot 1Qe!
* @since 2006-2-2 u2x=YUWb]
* @version 1.0 !{ )AV/\D
*/ n[w,x;
public class ImprovedMergeSort implements SortUtil.Sort { ZCF-*nm
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private static final int THRESHOLD = 10; kx#L<
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/* {zN_l!
* (non-Javadoc) U&\{/l
* qA\kx#v]P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q>oH(A
*/ />I8nS}T
public void sort(int[] data) { tS\NO@E_Jh
int[] temp=new int[data.length]; xr-`i
mergeSort(data,temp,0,data.length-1); _CwQ}n*
} %+W >+xRb
V4i%|vV
private void mergeSort(int[] data, int[] temp, int l, int r) { s=@CeV@4W
int i, j, k; Ewsg&CCN
int mid = (l + r) / 2; w3cK: C0
if (l == r) "}aM*(l+\
return; \osQwGPV
if ((mid - l) >= THRESHOLD) :Ty*i
mergeSort(data, temp, l, mid); +&8Ud8Q
else :\;uJ5
insertSort(data, l, mid - l + 1); ->9xw
if ((r - mid) > THRESHOLD) <%JO3E
mergeSort(data, temp, mid + 1, r); cQ ;Ry!$
else 8t \>
insertSort(data, mid + 1, r - mid); A|OC?NZY
b1^Yxe#L
for (i = l; i <= mid; i++) { ^nZ2p$
temp = data; ~TR|Pv
} {hP&P
for (j = 1; j <= r - mid; j++) { M{RZ-)IC
temp[r - j + 1] = data[j + mid]; ? Z fhz
} q;~>h
int a = temp[l]; +((31l
int b = temp[r]; Yf`.Cq_:
for (i = l, j = r, k = l; k <= r; k++) { s3!LR2qiF
if (a < b) { ;<R_j%*
data[k] = temp[i++]; ~"0X,APR5
a = temp; _%%"Y}
} else { (>`SS#(T!
data[k] = temp[j--]; >^HTghgRD
b = temp[j]; w:+#,,rwzV
} Bzt`9lg
} E}j8p_p
} r:rJv
fzG1<Gem
/** ]H7Mx\
* @param data /\I%)B47^9
* @param l <5vB{)Tq
* @param i ;!sGfrs0$
*/ r@UY$z
private void insertSort(int[] data, int start, int len) { M.^A`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `bF;Ew;
} 2![W N*N>O
} &bK$!8Z
} rM.<Gi05Qe
} cHct|Z u
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堆排序： ^{bEq\5&
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package org.rut.util.algorithm.support; o_m.MMEU
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import org.rut.util.algorithm.SortUtil; &JM;jSz
agD.J)v\
/** #;]F:TlR
* @author treeroot 0 d]G
* @since 2006-2-2 a/#,Y<kJ
* @version 1.0 UH|.@7w
*/ BQg]$Tr?
public class HeapSort implements SortUtil.Sort{ gP%!
uNBhVsM6<
/* (non-Javadoc) xhS/X3<th
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gi >{`.]
*/ aC 0Jfo
public void sort(int[] data) { X6 cb#s0|
MaxHeap h=new MaxHeap(); b<7qmg3
h.init(data); 3<V!y&a
for(int i=0;i h.remove(); #_\~Vrf(#
System.arraycopy(h.queue,1,data,0,data.length); A@'W $p?5r
} 2oASz|
K 5[ 3WHQ
private static class MaxHeap{ bOKNWI
~C x2Q4E
void init(int[] data){ Tyl"N{ _
this.queue=new int[data.length+1]; KVy5/A/8c
for(int i=0;i queue[++size]=data; D<6kAGE
fixUp(size); #::vMnT
} hZJqo +s
} "r+<=JU>OV
1X.1t^HH:
private int size=0; !{;RtUPz*
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private int[] queue; eO G%6C%a
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public int get() { o#6}?g.
return queue[1]; 6P|neb}
} oFp&j@`k8j
sAlgp2-
public void remove() { ztpb/9J9
SortUtil.swap(queue,1,size--); k]g\` gc
fixDown(1); k({8C`&tK/
} ,cEcMaJ
file://fixdown gK#w$s50
private void fixDown(int k) { pC8i&_A
int j; [NcOk,
while ((j = k << 1) <= size) { Pme?`YO$x
if (j < size %26amp;%26amp; queue[j] j++; 9Z 4R!Q
if (queue[k]>queue[j]) file://不用交换 :g";p.~=
break; XU7bWafy
SortUtil.swap(queue,j,k); $)V4Eu;
k = j; -2_$zk*n
} zPYa@0I
} ?2;G_P+
private void fixUp(int k) { K e8cfd~c
while (k > 1) { $n"Llw&)
int j = k >> 1; L+L9)8FJ
if (queue[j]>queue[k]) V ""
break; )`^:G3w
SortUtil.swap(queue,j,k); {5JXg9um
k = j; C-Z,L#
} }1dh/Cc`
} *93 N0m4Rl
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} _T$\$v$ {
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} 1-#tx*>AY
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SortUtil： p%-9T>og
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package org.rut.util.algorithm; L')zuI
<9~qAq7^
import org.rut.util.algorithm.support.BubbleSort; aJ5R0Y,
import org.rut.util.algorithm.support.HeapSort; %ZK}y{u\
import org.rut.util.algorithm.support.ImprovedMergeSort; x7?{*w&r
import org.rut.util.algorithm.support.ImprovedQuickSort; rGWTpN
import org.rut.util.algorithm.support.InsertSort; Xk$lQMwZ
import org.rut.util.algorithm.support.MergeSort; .w~USJ=X
import org.rut.util.algorithm.support.QuickSort; )EoG@:[
import org.rut.util.algorithm.support.SelectionSort; BR'|hG
import org.rut.util.algorithm.support.ShellSort; ~7 TzUb
u+_#qk0NfK
/** *$!LRmp?
* @author treeroot 9D,&)6
* @since 2006-2-2 Up&q#vqIj
* @version 1.0 /v[-KjTj7
*/ :w+Rs+R
public class SortUtil { _c2#
public final static int INSERT = 1; ;l'I.j
public final static int BUBBLE = 2; o[6hUX0tN
public final static int SELECTION = 3; l;uEw
public final static int SHELL = 4; d9(FwmE
public final static int QUICK = 5; zBbTj IFQ
public final static int IMPROVED_QUICK = 6; ?*4zNhL
public final static int MERGE = 7; "^H+A-R[
public final static int IMPROVED_MERGE = 8; x-<dJ}`
public final static int HEAP = 9; qJ@?[|2R
$H^6I8>
public static void sort(int[] data) { sq_:U_tJ
sort(data, IMPROVED_QUICK); pP @#|T
} d\v _!7
private static String[] name={ r!S iR(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8~i@7~ J
}; VA0TY/{ ]
!Xm:$KH
private static Sort[] impl=new Sort[]{ 7}Sw(g)o7
new InsertSort(), Q$%@.@
new BubbleSort(), m_B5M0},
new SelectionSort(), Ogb_WO;)
new ShellSort(), 9O"?T7i"#
new QuickSort(), J{y@ O
new ImprovedQuickSort(), T*IudxW
new MergeSort(), i,'~Ds
new ImprovedMergeSort(), yrjm0BM#
new HeapSort() j*5VJ:
}; e([&Nr8h
jhLh~. 8
public static String toString(int algorithm){ D&shrKFx
return name[algorithm-1]; m{*l6`dF
} VxCH}&!
9c6=[3)V
public static void sort(int[] data, int algorithm) { ,J|};s+
impl[algorithm-1].sort(data); AOe~VW
} fAs:[
^{w&&+#,q
public static interface Sort { +K?h]v]%
public void sort(int[] data); ')BQ 0sg
} so7;h$h!H
ld $`5!Z
public static void swap(int[] data, int i, int j) { W.a/k7 p
int temp = data; L6a8%%`
data = data[j]; O v-I2
data[j] = temp; 4g 1h:I/
} +FiV!nRkZ
} n'ro5D