[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; {ZfTUt)-P
} <w,aS;v6jp
int i1=l; +qS$t
int i2=mid+1; vk#xCggK
for(int cur=l;cur<=r;cur++){ _wHqfj)
if(i1==mid+1) p(x[zn+%Y
data[cur]=temp[i2++]; fwl RwH(
else if(i2>r) "ht2X w
data[cur]=temp[i1++]; 7x1jpQ-
else if(temp[i1] data[cur]=temp[i1++]; e94csTh=
else aX ?ON
data[cur]=temp[i2++]; 7`WK1_rR\
} IPT}JX'
} xSLN
wL%>
} .eeM&n;c
74Kl!A
改进后的归并排序: j4NS5
PqP)<d'/
package org.rut.util.algorithm.support; myJsRb5
7qh_URt@
import org.rut.util.algorithm.SortUtil; %l5J
Y8CXinh
/** 2oq>tnYyV[
* @author treeroot (,<?Pg7v:f
* @since 2006-2-2 %OzxR9
* @version 1.0 8"S0E(,mu
*/ Ajq<=y`NzV
public class ImprovedMergeSort implements SortUtil.Sort { )I5f`r=Ry
a{)"KAP
private static final int THRESHOLD = 10; 9h9Y:i*Gh5
#~ >0Dr
/* Y*7.3 +#
* (non-Javadoc) ^,`yt^^A
* OY@/18D<>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I/'jRM
*/ "2Ye\#BU6
public void sort(int[] data) { D%BV83S
int[] temp=new int[data.length]; kszYbz"
mergeSort(data,temp,0,data.length-1); Li7/pUq>}!
} LL:B H,[
]p$fEW g
private void mergeSort(int[] data, int[] temp, int l, int r) { Z?^AX&F
int i, j, k; b2:CFtH5
int mid = (l + r) / 2; 7, O_'T &
if (l == r) Z/2#h<zj
return; 6t@3 a?
if ((mid - l) >= THRESHOLD) XfY]qQP
mergeSort(data, temp, l, mid); E7 7Au;TL
else G2em>W_n
insertSort(data, l, mid - l + 1); "\e9Y<
if ((r - mid) > THRESHOLD) *VL-b8'A<
mergeSort(data, temp, mid + 1, r); TT29LC@
else %3~jg
insertSort(data, mid + 1, r - mid); N b+zP[C
1s1$J2LX
for (i = l; i <= mid; i++) { rVZkG,Q
temp = data; ZgzrA&6
} *!B,|]wq=
for (j = 1; j <= r - mid; j++) { :]?I|.a
temp[r - j + 1] = data[j + mid]; )C <sj
} :x16N|z
int a = temp[l]; |*8 J.H*r
int b = temp[r]; `+i<:,z-gs
for (i = l, j = r, k = l; k <= r; k++) { U${dWxC
if (a < b) { &:Raf5G-E
data[k] = temp[i++]; /y NU0/
a = temp; m:K/)v*
} else { A2htD!3
data[k] = temp[j--]; /pV^w
b = temp[j]; O~igwFe
} ;[%AeN5W
} E?%rmdyhL!
} mGoUF$9 k
UF0PWpuO
/** Z(CzU{7c
* @param data V>z8*28S.
* @param l ky[FNgQ3n
* @param i P PmE.%_
*/ KZ&8aulP
private void insertSort(int[] data, int start, int len) { 0~"{z>s '
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nww,y
} y/ vE
} hoPCbjkov
} 2}hEBw68
} 9D-PmSnv
`43E-'g
堆排序： \vpUl
(LQ*U3J]_
package org.rut.util.algorithm.support; [?_^Cy
_PQQ&e)E
import org.rut.util.algorithm.SortUtil; F DXAe-|Q
0(HUy`]>
/** 0riTav8
* @author treeroot _sx]`3/86
* @since 2006-2-2 SmC91XO
* @version 1.0 kOeW,:&65
*/ EtKy?]i
public class HeapSort implements SortUtil.Sort{ M/>^_zG
KN_3]-+B
/* (non-Javadoc) N9idk}T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O*T(aM3r
*/ ,D;d#fJ
public void sort(int[] data) { +>Y2luR1
MaxHeap h=new MaxHeap(); X`#vH8
h.init(data); REc69Y.k
for(int i=0;i h.remove(); THkg,*;:
System.arraycopy(h.queue,1,data,0,data.length); }-!0d*I
} qgDd^0
j%Usui<DL
private static class MaxHeap{ +<&_1%5+
g \&Z_
void init(int[] data){ `l'z#\
this.queue=new int[data.length+1]; [Vc8j&:L
for(int i=0;i queue[++size]=data; 1Sx2c
fixUp(size); 42~tdD
} (HDR}!.E
} ~"#qG6dP
?7*.S Lt
private int size=0; Qw}uB$S>
V*}ft@GPD
private int[] queue; 4ba[*R2
Rcc9Tx(zvQ
public int get() { fl9`Mgu
return queue[1]; eD4X:^@
} Uyj6Ij_Pj)
58V`I5_
public void remove() { <Y:{>=
SortUtil.swap(queue,1,size--); Nu/wjx$b
fixDown(1); B/0Xqyu
} +Hgil
file://fixdown f; w\k7 #
private void fixDown(int k) { +DU^"q=
int j; [0qe ?aI
while ((j = k << 1) <= size) { i}[cq_wJ
if (j < size %26amp;%26amp; queue[j] j++; )[+82~F
if (queue[k]>queue[j]) file://不用交换 ";yey]
break; u0zF::
SortUtil.swap(queue,j,k); qHaH=g%
k = j; :m]H?vq] \
} OD]`oJ|
} J}BN}|Y@2
private void fixUp(int k) { ?I{L^j^#4
while (k > 1) { 9sG]Q[:.]
int j = k >> 1; xy))}c%
if (queue[j]>queue[k]) >J*x` a3Q
break; ct`j7[
SortUtil.swap(queue,j,k); rP|~d}+I
k = j; %D1 |0v8}
} Swa0TiT(
} Ql"kJ_F!br
fG9 ;7KG
} @<(4J
KW-GVe%8f
} /oOZ>B%1s
{ppzg`G\
SortUtil： K*I!:1;3N
/9ctmW1!<
package org.rut.util.algorithm; U}@xMt8@l
*IX<&u#
import org.rut.util.algorithm.support.BubbleSort; v|\3FEu@
import org.rut.util.algorithm.support.HeapSort; ~-R%m
import org.rut.util.algorithm.support.ImprovedMergeSort; Rjp7H
import org.rut.util.algorithm.support.ImprovedQuickSort; %5RR<[_/;
import org.rut.util.algorithm.support.InsertSort; 3{$vN).
import org.rut.util.algorithm.support.MergeSort; }`cf3'rdk
import org.rut.util.algorithm.support.QuickSort; @,Z0u2WLl6
import org.rut.util.algorithm.support.SelectionSort; s@Dln Du.
import org.rut.util.algorithm.support.ShellSort; B6=?Qp/f
V6Mt;e)C
/** @`$'sU
* @author treeroot J0V`sK
* @since 2006-2-2 k/P.[5
* @version 1.0 Y<L35 ?
*/ L4,b ThSG
public class SortUtil { HS[($
public final static int INSERT = 1; Q2/65$nW
public final static int BUBBLE = 2; /sfJ:KP0
public final static int SELECTION = 3; $Nd,6w*`
public final static int SHELL = 4; ?iZ2sRWR6
public final static int QUICK = 5; mG"xo^1_H
public final static int IMPROVED_QUICK = 6; %UAF~2]g
public final static int MERGE = 7; m _cRK}>
public final static int IMPROVED_MERGE = 8; E\|nP~;~F9
public final static int HEAP = 9; +F-EgF+J
b7XB l
public static void sort(int[] data) { 4 km^S9
sort(data, IMPROVED_QUICK); eU\xOTl~<{
} _f'v>"K
private static String[] name={ 85YUqVi9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 84vd~Cf9
}; aaP_^m O
NV7k@7_{B
private static Sort[] impl=new Sort[]{ q3AqU?f
new InsertSort(), s1q8r!2\w
new BubbleSort(), +D@5zq:5
new SelectionSort(), \?pyax8
new ShellSort(), tI1OmhNN
new QuickSort(), R&9FdM3K`:
new ImprovedQuickSort(), lD[37U!
new MergeSort(), Fvf|m7
new ImprovedMergeSort(), ~:{05W
new HeapSort() Y=p!xr>
}; h);^4cU
M?!@L:b[
public static String toString(int algorithm){ H1I^Vij
return name[algorithm-1]; y~fKLIoz"
} w9{C"K?u=
As<B8e]
public static void sort(int[] data, int algorithm) { lDTHK2f
impl[algorithm-1].sort(data); RN[I%^$"
} .4p3~r?=S
AH|gI2
public static interface Sort { @^A5{qQ\
public void sort(int[] data); #obRr#8
} '`3#FCg
@@)2 12
public static void swap(int[] data, int i, int j) { 1>"-!ADm
int temp = data; !bP%\)5
data = data[j]; "!~o
data[j] = temp; ,;_+o]
} )P$|9<_q7x
} tO&ffZP8$