[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 2+_a<5l~
} ,l Y4WO
int i1=l; Xv3pKf-K
int i2=mid+1; TJ1h[
for(int cur=l;cur<=r;cur++){ Wy%FF\D.Y
if(i1==mid+1) >n^780S|
data[cur]=temp[i2++]; U*b7 Pxq;
else if(i2>r) zz /4 ()u
data[cur]=temp[i1++]; 3)yL#hXg)
else if(temp[i1] data[cur]=temp[i1++]; xHMFYt+0$G
else |kP utB
data[cur]=temp[i2++]; u"4B5D
} Evd|_W-
} cPv(VjS1;
axpZ`BUc
} 3~VV2O
bF6J>&]!
改进后的归并排序: uFhaN\S
)U=]HpuzI
package org.rut.util.algorithm.support; sM+~x<}0
Vd(n2JMtG
import org.rut.util.algorithm.SortUtil; \ 'Va(}v
#*:^\z_Jd
/** $xWUzg1<U
* @author treeroot Qe{w)e0}`
* @since 2006-2-2 `XpQR=IOMb
* @version 1.0 z$WLx
*/ X8">DR&>Y
public class ImprovedMergeSort implements SortUtil.Sort { u~aRFQ:
Qz3Z_V4k9
private static final int THRESHOLD = 10; 5C&*PJ~WA
4hODpIF
/* SiUu**zC
* (non-Javadoc) yOt#6Vw
* 1[T7;i$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [q_+s
*/ UKQ"sC
public void sort(int[] data) { 4(8trD6
int[] temp=new int[data.length]; Px&_6}YWy
mergeSort(data,temp,0,data.length-1); 1I{8 |
} "i\#L`TkzX
VX&PkGi?o
private void mergeSort(int[] data, int[] temp, int l, int r) { ;0Pv49q
int i, j, k; nQoQNB
int mid = (l + r) / 2; N-]/MB8
if (l == r) |/vJ+aKq
return; <l$ d>,
if ((mid - l) >= THRESHOLD) X.#)CB0c1Q
mergeSort(data, temp, l, mid); P6R_W
else ,|B-Nq
insertSort(data, l, mid - l + 1); H#DvCw
if ((r - mid) > THRESHOLD) RQb}t,
mergeSort(data, temp, mid + 1, r); @1Q-.54a
else Pal=I)
insertSort(data, mid + 1, r - mid); OU"%,&J
fj))Hnt(|
for (i = l; i <= mid; i++) { i5t6$|u:&m
temp = data; ~y2zl
} -X~mW
for (j = 1; j <= r - mid; j++) { Cf3!Ud
temp[r - j + 1] = data[j + mid]; ?UZt30|1
} ?)y^ [9
int a = temp[l]; +)iMJ]>
int b = temp[r]; (rd [tc
for (i = l, j = r, k = l; k <= r; k++) { Ca PHF@6WN
if (a < b) { weSq|f
data[k] = temp[i++]; kB> ~Tb0
a = temp; X 3$ W60Q
} else { > 'hM"4f
data[k] = temp[j--]; 6eB;
b = temp[j]; n+Kv^Y`qxO
} -g]Rs!w'
} L"NHr~
} m&Mupl
+ti ?7|bK<
/** j 0pI
* @param data [YfoQ1
* @param l N);w~)MYh
* @param i wOl?(w=|
*/ ||_hET
private void insertSort(int[] data, int start, int len) { m|;(0 rft
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -juG[zn
} uv27Vos
} YR9fw
} A913*O:\
} {K]5[bMT
{O^u^a\m
堆排序： kkF)Tro\
]:59c{O
package org.rut.util.algorithm.support; ^ RA'E@"
rNii,_
import org.rut.util.algorithm.SortUtil; FM >ae-L-
[d6!
/** 6!ve6ZB[p
* @author treeroot KLg1(W(
* @since 2006-2-2 3}0\W.jH
* @version 1.0 6'r8.~O
*/ DPTk5o[
public class HeapSort implements SortUtil.Sort{ .$%p0Yx+
,erf{"Nh
/* (non-Javadoc) s9;6&{@%wO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $(aq;DR
*/ (Q^sK\
public void sort(int[] data) { 0N.h:21(4
MaxHeap h=new MaxHeap(); ej`%}e%2
h.init(data); MC}t8L=
for(int i=0;i h.remove(); XH"+oW
System.arraycopy(h.queue,1,data,0,data.length); /x6p
} 5^u$zfR
CWn\KR
private static class MaxHeap{ vxOqo)yO
_\ToA9m
void init(int[] data){ (+> 2&@@<
this.queue=new int[data.length+1]; 3'0Pl8
for(int i=0;i queue[++size]=data; d(T4Kd$r
fixUp(size); {r,Uik-nL
} wA=r]BT
} N{;!xIv
;sZG=y@
private int size=0; s[yWBew
Cbw *?9d
private int[] queue; &AQqI
fu/8r%:h
public int get() { hmO2s/~
return queue[1]; q@|+`>h
} C82_)@96
`@~e<s`j
public void remove() { Y'iX
SortUtil.swap(queue,1,size--); ~t`^|cr|
fixDown(1); XA>W>|
} M&Ka^h;N
file://fixdown LVj1NP
private void fixDown(int k) { 2$JGhgDI
int j; 4Gc M
while ((j = k << 1) <= size) { #z*,CU#S9d
if (j < size %26amp;%26amp; queue[j] j++; H_DCdUgC'
if (queue[k]>queue[j]) file://不用交换 n~N>;mP
break; ]gk1q{Ql<
SortUtil.swap(queue,j,k); ze+YQF
k = j; RP4/:sO
} yB b%#GW
} uJ!&T
private void fixUp(int k) { Ms{";qiG
while (k > 1) { (vs<Fo|]
int j = k >> 1; *'<AwG&
if (queue[j]>queue[k]) 5)k8(kH
break; uN|A}/hr]
SortUtil.swap(queue,j,k); `g)}jo`W
k = j; Bt+^H6cb
} $)i`!7`4=
} c/;;zc
oL<#9)+2*
} )ZG;.j
3o<d=@`r
} )dXa:h0RZ
^X=Q{nB
SortUtil： y+k_&ss
!#tVQ2O
package org.rut.util.algorithm; &`"DG$N(
$*yYmF
import org.rut.util.algorithm.support.BubbleSort; *]6g-E?:@
import org.rut.util.algorithm.support.HeapSort; o.+;]i}D
import org.rut.util.algorithm.support.ImprovedMergeSort; Dp@XAyiA[
import org.rut.util.algorithm.support.ImprovedQuickSort; ^9g$/8[^c_
import org.rut.util.algorithm.support.InsertSort; z;c>Q\Q
import org.rut.util.algorithm.support.MergeSort; b$G{^
import org.rut.util.algorithm.support.QuickSort; FaL\6w
import org.rut.util.algorithm.support.SelectionSort; 1^~&"s U
import org.rut.util.algorithm.support.ShellSort; bjZJP\6
067c/c
/** _Cmmx`ln
* @author treeroot "[bkdL<
* @since 2006-2-2 +#}GmUwPG$
* @version 1.0 DJP6Z
*/ i]JTKL{\q
public class SortUtil { M&Uy42,MR
public final static int INSERT = 1; Njq}M/{U
public final static int BUBBLE = 2; ]-=L7a
public final static int SELECTION = 3; =$>=EBH,cm
public final static int SHELL = 4; ]g_VPx"
public final static int QUICK = 5; 4ot<Uw5
public final static int IMPROVED_QUICK = 6; TBj2(Z
public final static int MERGE = 7; LU1I `E
public final static int IMPROVED_MERGE = 8; Y0LZbT3
public final static int HEAP = 9; IkrB}
Y-VDi.]W
public static void sort(int[] data) { ]z'&oz
sort(data, IMPROVED_QUICK); =~D? K9o
} 3uL f0D
private static String[] name={ qt"D!S_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dbp\tWaW
}; :6n#y-9^1
o+A7hBM^
private static Sort[] impl=new Sort[]{ mw@Pl\=
new InsertSort(), +C(-f
new BubbleSort(), H4$qM_N
new SelectionSort(), 'o AmA=
new ShellSort(), GABZsdFZ!
new QuickSort(), xL}i9ozZ
new ImprovedQuickSort(), w^yb`\$
new MergeSort(), l45/$G7
new ImprovedMergeSort(), LUOjaX
new HeapSort() JGs:RD'
}; --yF%tRMP
h\s/rZg=r
public static String toString(int algorithm){ 2g.lb&3W
return name[algorithm-1]; EX8JlA\-W
} )M0YX?5AR
r`H}f#.KR
public static void sort(int[] data, int algorithm) { agIqca;
impl[algorithm-1].sort(data); DUp`zW;B
} wk(25(1q
8-Abg:)
public static interface Sort { |/Nh#
public void sort(int[] data); 18&"j 8'm
} eYOY
z.vQ1~s
public static void swap(int[] data, int i, int j) { C@(@n!o:!
int temp = data; x|H`%Z
data = data[j]; !_QI<=X
data[j] = temp; 7!O"k#
} mdi!Q1pS
} {u'szO}k