[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; W7 E-j+2
} z~_\onC
int i1=l; |)_R bqZ
int i2=mid+1; %xruPWT:k
for(int cur=l;cur<=r;cur++){ r/v&tU
if(i1==mid+1) +OmSR*fA0
data[cur]=temp[i2++]; SrtmpQ
else if(i2>r) izw}25SW
data[cur]=temp[i1++]; h.^DRR^S
else if(temp[i1] data[cur]=temp[i1++]; mc=*wr$
else E.3}a>f
data[cur]=temp[i2++]; Rt|Hma
} n\YxRs7 hF
} 3{z|301<m
r?TK@^z
} K6U>Qums
{Vm36/a
改进后的归并排序: mI0r,Z*+M
MD)"r>k
package org.rut.util.algorithm.support; 8GP}g?%
( A)wcB
import org.rut.util.algorithm.SortUtil; #.)>geLC>9
l.juys8s
/** cn0Fz"d
* @author treeroot "m3Y))a
* @since 2006-2-2 iQF}x&a<
* @version 1.0 ~}AP@t*
*/ B@=<'/S\7
public class ImprovedMergeSort implements SortUtil.Sort { AIyv;}5
&^H "T6
private static final int THRESHOLD = 10; h~@+M5r,
!;gke,fB
/* <&2,G5XA
* (non-Javadoc) &>{>k<z
* lo:~~l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c5R{Sl
*/ qrc/Q;$
public void sort(int[] data) { VZoOdR:d
int[] temp=new int[data.length]; \sd"iMEi
mergeSort(data,temp,0,data.length-1); C":\L>Ax
} aC:l;
nS4S[|w"
private void mergeSort(int[] data, int[] temp, int l, int r) { E2IVR]C2^
int i, j, k; f zO8by
int mid = (l + r) / 2; -#6*T,f0P(
if (l == r) ArYF\7P
return; ];;w/$zke
if ((mid - l) >= THRESHOLD) ([*t.
mergeSort(data, temp, l, mid); DcA'{21
else !&lPdEc@T
insertSort(data, l, mid - l + 1); njMy&$6a##
if ((r - mid) > THRESHOLD) ~P_kr'o
mergeSort(data, temp, mid + 1, r); ]Qr8wa>Z
else ;l()3;
insertSort(data, mid + 1, r - mid); LDeVNVM
GJs[m~`8#
for (i = l; i <= mid; i++) { c!Vc_@V,
temp = data; J36@Pf]h
} L@r.R_*H?s
for (j = 1; j <= r - mid; j++) { sV[Z|$&Z
temp[r - j + 1] = data[j + mid]; Xb*_LZAU
} hhAC@EGG
int a = temp[l]; M[u3]dN
int b = temp[r]; 4d G-
for (i = l, j = r, k = l; k <= r; k++) { "S`wwl
if (a < b) { --`LP[ll
data[k] = temp[i++]; )c/y07er
a = temp; o(/ia3
} else { o$VH,2 QF
data[k] = temp[j--]; >;v0zE
b = temp[j]; ;|QR-m2/
} acY[?L_6J
} v:MS0]
} 2TEeP7
RCYbRR4y
/** "n }fEVJ,
* @param data Q+(:n)G_6E
* @param l /'6[*]IZP
* @param i 9Fx z!-9m
*/ Ko)T>8:
private void insertSort(int[] data, int start, int len) { T zYgH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NB5B$q_'#
} ?]D+H%3[$i
} o%PoSZZ
} Z4ov
} \BaN5+B6
',`4 U F
堆排序： J7;n;Mx
:TYzzl43
package org.rut.util.algorithm.support; 8;\tP29
jnzz~:
import org.rut.util.algorithm.SortUtil; 0C+yq'D~[
3dDQz#
/** [e@OHQM
* @author treeroot P8,jA<W
* @since 2006-2-2 ?>jArzI
* @version 1.0 G>S1Ld'MV
*/ _8pkejg
public class HeapSort implements SortUtil.Sort{ 1vK(^u[
`Mn{bd
/* (non-Javadoc) NvHy'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sk6|_
*/ ,tF" 4|#
public void sort(int[] data) { Bj($_2M%+
MaxHeap h=new MaxHeap(); u|>U`[Zpj
h.init(data); nQ!#G(_nO
for(int i=0;i h.remove(); MQH8Q$5D
System.arraycopy(h.queue,1,data,0,data.length); O\F^@;]F6
} 0*IY%=i
:'rZZeb'
private static class MaxHeap{ i^cM@?
t>GLZzO
void init(int[] data){ W<N QUf[=
this.queue=new int[data.length+1]; 7K]U|K#
for(int i=0;i queue[++size]=data; D3AtYt
fixUp(size); < Gy!i/
} o p5^9`"
} 5YG@[ic
~K#_'Ldrd
private int size=0; 4f[M$xU&h
`{Di*
private int[] queue; i =fOdp
-5,y 1_M
public int get() { ="w8U'
return queue[1]; (VI* c!N
} h:Mn$VR,
p C2c(4
public void remove() { lyH X#]
SortUtil.swap(queue,1,size--); V?V)&y] 4
fixDown(1); Nw$[a$^n
} ^AjYe<RU}
file://fixdown ,-IF++q
private void fixDown(int k) { O{cGk: y
int j; q{Ta?|x#
while ((j = k << 1) <= size) { :f !=_^}
if (j < size %26amp;%26amp; queue[j] j++; @uM3iO7&
if (queue[k]>queue[j]) file://不用交换 (T#(A4:6S
break; vl{_M*w ;
SortUtil.swap(queue,j,k); m57tOX
k = j; S}p&\w H
} tqwk?[y}+l
} IJBJebqL
private void fixUp(int k) { p<0kmA<B/
while (k > 1) { )>X|o$2
int j = k >> 1; . I&)MZ>n
if (queue[j]>queue[k]) C|~JPcl
break; "K$Wh1<7
SortUtil.swap(queue,j,k); %f> |fs
k = j; si!9Gz;
} >7(~'#x8A"
} :*&9TNUE@
73s3-DS,
} bR8 HGH28
z2nUul(2
} ;'Vipj
6v2RS
SortUtil： 3{I=#>;
.";tnC!e
package org.rut.util.algorithm; x [{q&N!"`
vu'!-K=0
import org.rut.util.algorithm.support.BubbleSort; SL\y\GaV
import org.rut.util.algorithm.support.HeapSort; ?ZuD _L-i
import org.rut.util.algorithm.support.ImprovedMergeSort; lF}$`6
import org.rut.util.algorithm.support.ImprovedQuickSort; i h$@:^\
import org.rut.util.algorithm.support.InsertSort; vPl6Dasr
import org.rut.util.algorithm.support.MergeSort; WVT5VJ7*
import org.rut.util.algorithm.support.QuickSort; ug6f
import org.rut.util.algorithm.support.SelectionSort; tp0!,ne*
import org.rut.util.algorithm.support.ShellSort; e"s{_V
w{zJE]7
/** q{De&Bu
* @author treeroot ",aT<lw.
* @since 2006-2-2 qp~4KukL
* @version 1.0 1nlE3Y?AV
*/ sRe#{EuJ
public class SortUtil { Q!2iOvK
public final static int INSERT = 1; AR+\uD=\I-
public final static int BUBBLE = 2; s?G'l=CcKu
public final static int SELECTION = 3; sAjKf\][
public final static int SHELL = 4; 5nxS+`Pn.)
public final static int QUICK = 5; N9JgV,`
public final static int IMPROVED_QUICK = 6; M8",t{7
public final static int MERGE = 7; 8NAWA3^B
public final static int IMPROVED_MERGE = 8; XC/]u%n8](
public final static int HEAP = 9; X\3,NR,
|!xfIR>=F
public static void sort(int[] data) { =6Kv`
sort(data, IMPROVED_QUICK); =S[FJaIu7
} 6Er0o{iI
private static String[] name={ e2-70UvW^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (9YYv+GGd*
}; vA"`0
#EQx
private static Sort[] impl=new Sort[]{ $`XN
new InsertSort(), FG;<`4mY
new BubbleSort(), B=Zukg1G
new SelectionSort(), hV>4D&<
new ShellSort(), @cS1w'=
new QuickSort(), sx-Hw4.a"
new ImprovedQuickSort(), I"F .%re
new MergeSort(), ><#2O
new ImprovedMergeSort(), mS)|6=Y
new HeapSort() J^g,jBk
}; 0,~6TV<K
GOZQ5m -
public static String toString(int algorithm){ q(jkit~`A
return name[algorithm-1]; vU8FHVytV
} 7i+!^Qj?y
M]4=(Vv+5
public static void sort(int[] data, int algorithm) { =mi:<q
impl[algorithm-1].sort(data); aX[1H6&=7
} x'=3&vc4
P+;CE|J`X
public static interface Sort { B.Zm$JZ:
public void sort(int[] data); veX"CY`hn
} z*dQIC
e0~sUVYf
public static void swap(int[] data, int i, int j) { j2o1"
int temp = data; !0!U01SWa
data = data[j]; /.|A
data[j] = temp; [yYH>~SuwZ
} :Er^"9'A2
} :!+}XT7)/