[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; )uu1AbT+e
} 9vI<\ Xa
int i1=l; T1=T
int i2=mid+1; ZfP$6%;_
for(int cur=l;cur<=r;cur++){ G_/DzJBF
if(i1==mid+1) JK'FJ}Z4
data[cur]=temp[i2++]; l~Rd\.O
else if(i2>r) yr/G1?k%ML
data[cur]=temp[i1++]; S^T ><C
else if(temp[i1] data[cur]=temp[i1++]; ]-"G:r
else f O,5 u;
data[cur]=temp[i2++]; 2rPmu
} H<Ik.]m
} M)1Y7?r]
" `FcW
} !8*lU2
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改进后的归并排序: O QGKH6q
cK.z&y0]
package org.rut.util.algorithm.support; 85?;\5%-
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import org.rut.util.algorithm.SortUtil; ,9Si3vn
D1R$s*{
/** uN8RG_Mb
* @author treeroot W.CbNou
* @since 2006-2-2 dJ>~
* @version 1.0 cp$GP*{@
*/ `i<omZ[aT
public class ImprovedMergeSort implements SortUtil.Sort { @|([b r|O
:T )R;E@
private static final int THRESHOLD = 10; qsWy <yL+
75^AO>gt
/* 5Deo}(3
* (non-Javadoc) ez<V
* 2"6bz^>}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +h08uo5c
*/ nM|Cv
public void sort(int[] data) { oju,2kpH7#
int[] temp=new int[data.length]; #f<3[BLx
mergeSort(data,temp,0,data.length-1); ( 4(,"
} "fu:hHq
T/]f5/
private void mergeSort(int[] data, int[] temp, int l, int r) { /V GI@"^v
int i, j, k; uH]oHh!}j
int mid = (l + r) / 2; c{ ([U
if (l == r) rXP~k]tC
return; _;M3=MTM9
if ((mid - l) >= THRESHOLD) ,pIh.sk7s*
mergeSort(data, temp, l, mid); /mXxj93UA
else #MFIsx)r
insertSort(data, l, mid - l + 1); =;"=o5g_
if ((r - mid) > THRESHOLD) lhC hk7l
mergeSort(data, temp, mid + 1, r); PdtL Cgd
else 7-gT:
insertSort(data, mid + 1, r - mid); R*/s#*gmL
y9b%P]i
for (i = l; i <= mid; i++) { TJCE6QG
temp = data; LUdXAi"f
} !_P&SmK3
for (j = 1; j <= r - mid; j++) { ;SIWWuk
temp[r - j + 1] = data[j + mid]; eG7Yyz+t$
} _"*}8{|
int a = temp[l]; 6H=gura&
int b = temp[r]; 0X3yfrim
for (i = l, j = r, k = l; k <= r; k++) { Y (pUd3y
if (a < b) { tI)|y?q
data[k] = temp[i++]; ocu,qL)W
a = temp; m?kyAW'|
} else { Dxy^r*B
data[k] = temp[j--]; t)1`^W}
b = temp[j]; 1yVhO2`7]
} w2db=9
} j#0JD!Vr
} ||?@pn\
1ktxG1"1
/** $<AaeyR!N
* @param data Q':hmulT!
* @param l o7t{?|
* @param i T<-_#}.Hn
*/ Ss%1{s~ok
private void insertSort(int[] data, int start, int len) { ~Up{zRD"B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P?S]Q19Q4
} 5vg="@O K
} sn"z'=ch
} xv&h>GOg
} oC-v>&bW
yzv"sd[8N
堆排序： f,4erTBH
. P+Qu
package org.rut.util.algorithm.support; MqJ5|C.q
t1]/Bw`j/
import org.rut.util.algorithm.SortUtil; Vd(n2JMtG
"Kdn`zN{
/** G;$;$gM
* @author treeroot 'qvj[lpGr
* @since 2006-2-2 K|YB)y
* @version 1.0 aCI3Tx&2qT
*/ K{{_qFj@<y
public class HeapSort implements SortUtil.Sort{ zCuB+r=C
d$jwh(Ivs
/* (non-Javadoc) }opw_h+/F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ulx]4;uzf
*/ ^H&U_
public void sort(int[] data) { > K?OsvX
MaxHeap h=new MaxHeap(); [}]yJ+)
h.init(data); rlD!%gG2x
for(int i=0;i h.remove(); *= ?|n
System.arraycopy(h.queue,1,data,0,data.length); 15hqoo9!
} Fj(GyPFG
/0 4US5En
private static class MaxHeap{ P:t .Nr"
a eeor
void init(int[] data){ MM_:2 ^P)
this.queue=new int[data.length+1]; +D:8r|evH
for(int i=0;i queue[++size]=data; -rn6ZSD)
fixUp(size); Q2D!Agq=D
} xhOoZ-
} tM^4K r~o,
"L:4 7!8
private int size=0; &iVdqr1,
2 U]d1
private int[] queue; r34MDUZdI
RFyMRE!?
public int get() { y;uR@{
return queue[1]; 31@Lr[!
} c~?Zmdn:
r`.N?
public void remove() { [IQ|c?DxpL
SortUtil.swap(queue,1,size--); msM1K1er
fixDown(1); |PlNVd2
} Hddc-7s
file://fixdown ~y2zl
private void fixDown(int k) { >a,D8M?
int j; c%J6!\
while ((j = k << 1) <= size) { JD~;.3$/k
if (j < size %26amp;%26amp; queue[j] j++; ,_fz)@)
if (queue[k]>queue[j]) file://不用交换 4a"Fu<q
break; u}gavG l
SortUtil.swap(queue,j,k); P=5+I+
k = j; ANy*'/f
} GD{L$#i!
} NOuG#P
private void fixUp(int k) { D**GC
while (k > 1) { Cq"KKuf
int j = k >> 1; hU8Y&R)=9
if (queue[j]>queue[k]) `X}:(O^GO
break; C=/B\G/.9
SortUtil.swap(queue,j,k); {^ b2nOMv
k = j; ^Aq0<
} U8w_C\Q
} `daqzn
WXl+w7jr
} m|;(0 rft
\ph.c*c
} u]};QR
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SortUtil： pW(rNAJ!
BzP,Tu{,
package org.rut.util.algorithm; 6t6Z&0$h~
cKe%P|8
import org.rut.util.algorithm.support.BubbleSort; C/Khp +
import org.rut.util.algorithm.support.HeapSort; )ODF6Ag
import org.rut.util.algorithm.support.ImprovedMergeSort; ]~KLdgru_
import org.rut.util.algorithm.support.ImprovedQuickSort; _XV%}Xb'
import org.rut.util.algorithm.support.InsertSort; GWnIy6TH l
import org.rut.util.algorithm.support.MergeSort; zKO7`.*
import org.rut.util.algorithm.support.QuickSort; Dj&~x
import org.rut.util.algorithm.support.SelectionSort; kg[%Q]]
import org.rut.util.algorithm.support.ShellSort; /Hyz]46
&0Yg:{k$
/** .p&@;fZ
* @author treeroot *h!fqT%9
* @since 2006-2-2 _U<fS
* @version 1.0 /|1p7{km
*/ /Vn>(;lo
public class SortUtil { !Qe;oMqy}
public final static int INSERT = 1; Nr4:Gih
public final static int BUBBLE = 2; ?Gki0^~J
public final static int SELECTION = 3; ?;XEb\Kf
public final static int SHELL = 4; t'rN7.d
public final static int QUICK = 5; kI^* '=:
public final static int IMPROVED_QUICK = 6; <U@N^#
public final static int MERGE = 7; [y[d7V9_o
public final static int IMPROVED_MERGE = 8; udZOg
public final static int HEAP = 9; ;Y$>WKsV
&12KpEyf
public static void sort(int[] data) { _\ToA9m
sort(data, IMPROVED_QUICK); sjr,)|#[
} ;uUFgDi
private static String[] name={ :8A+2ra&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ey&H?OFiP
}; d;Vy59}eY
~&i4FuK
private static Sort[] impl=new Sort[]{ `p\=NP!n
new InsertSort(), |h>PUt@LL
new BubbleSort(), Y%s:oHt
new SelectionSort(), 1iy$n
new ShellSort(), F4EAC|Y
new QuickSort(), I,j4 BU4
new ImprovedQuickSort(), Tlsh[@Q
new MergeSort(), /kW Z 8Z
new ImprovedMergeSort(), mgq!)
new HeapSort() _FY&XL=
}; Oj5UG*
jT{T#_
public static String toString(int algorithm){ sgX!4wG&Z
return name[algorithm-1]; 2bp@m;g$
} LL^KZ-
lkn|>U[
public static void sort(int[] data, int algorithm) { 0bg"Q4
impl[algorithm-1].sort(data); 94u{k1d x
} .+9hm|
*@2Bh4
public static interface Sort { VY0.]t
public void sort(int[] data); n~N>;mP
} ]gk1q{Ql<
ze+YQF
public static void swap(int[] data, int i, int j) { RP4/:sO
int temp = data; yB b%#GW
data = data[j]; ) 7/Cg
data[j] = temp; PsY![CPrW
} -8TJ:#|N
} #~*v##^vFH