[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; 8S[<[CH
} /Gh x2B
int i1=l; 9^b7jw
int i2=mid+1; )n[`Z#
for(int cur=l;cur<=r;cur++){ ;Wfv+]n9
if(i1==mid+1) JWUv H
data[cur]=temp[i2++]; }QApeZd+q
else if(i2>r) kp#c:ym
data[cur]=temp[i1++]; W[jW;uk
else if(temp[i1] data[cur]=temp[i1++]; +Zty}fe
else oJ4mxi@|#
data[cur]=temp[i2++]; ';fU.uy
} "R\\\I7u
} ^Yf)lV&[
WL]Wu.k
} Q9x` Uy
MZ|c7f&`
改进后的归并排序: z</XnN
N~Sue
package org.rut.util.algorithm.support; ~,`\D7Z3
mTb2d?NS
import org.rut.util.algorithm.SortUtil; w'5dk3$"
CwH)6uA
/** .LGkr@P
* @author treeroot fd,}YAiX
* @since 2006-2-2 6f5sIg
* @version 1.0 nCSd:1DY
*/ D/!eov4"
public class ImprovedMergeSort implements SortUtil.Sort { Js^r]=\F'
W:;`
private static final int THRESHOLD = 10; 2\iD;Z#gM
9^C!,A{u4
/* ^c[CyZ:a
* (non-Javadoc) nfd?@34"A2
* ;|2;kvf"w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +gD)Yd
*/ u1pYlu9IW
public void sort(int[] data) { VW<"c 5|
int[] temp=new int[data.length]; NZw[.s>n
mergeSort(data,temp,0,data.length-1); RL]lt0O{
} .@/z-OgXg
Jb)eC?6O
private void mergeSort(int[] data, int[] temp, int l, int r) { no\}aTx
int i, j, k; ;>QK}#'
int mid = (l + r) / 2; #Ko+_Hm?4
if (l == r) 40l#'< y;
return; [jtj~]&mO
if ((mid - l) >= THRESHOLD) 5 a*'N~
mergeSort(data, temp, l, mid); Um0<I)
else V;(*\"O
insertSort(data, l, mid - l + 1); Jj^<:t5{rN
if ((r - mid) > THRESHOLD) 4{;8 ]/.a
mergeSort(data, temp, mid + 1, r); H$qdU!c
else DT7-v4Zd
insertSort(data, mid + 1, r - mid); T$8$9D_u
:BZx)HxQ
for (i = l; i <= mid; i++) { oRJP5Y5na
temp = data; (1r>50Ge
} [2H(yLwO
for (j = 1; j <= r - mid; j++) { *v7& T
temp[r - j + 1] = data[j + mid]; zf!\wY"`
} ?` ZGM
int a = temp[l]; me}Gb a
int b = temp[r]; o._#=7|(
for (i = l, j = r, k = l; k <= r; k++) { ,ex(pmZ;
if (a < b) { X-2S*L'
data[k] = temp[i++]; kvO`]>#;$?
a = temp; smLDm
} else { L!}j3(I
data[k] = temp[j--]; li'1RKr
b = temp[j]; da86Jj=k
} %>z8:oJ
} f!R^;'a
} F*jjcUk
Jv{"R!e"P
/** ]2sZu7
* @param data Qj~W-^/ -
* @param l 0|+hm^'_
* @param i T[$hYe8%^
*/ s?\9i6
private void insertSort(int[] data, int start, int len) { ^[?+=1 k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Kd[`mkmS
} 17[t_T&Ak9
} &+r ;>
} ", Rw%_
} uc(yos
]B.,7
堆排序： MUt^mu$86
"E[*rnsLN
package org.rut.util.algorithm.support; 6%hEs6-R
' ^L
import org.rut.util.algorithm.SortUtil; K}*p(1$u
;NVTn<Uj
/** O}iKPY8K
* @author treeroot iqKfMoy5
* @since 2006-2-2 Pv$"DEXA2
* @version 1.0 lG^nT
*/ mbG^fy'
public class HeapSort implements SortUtil.Sort{ :bF2b..XOu
G;#t6bk
/* (non-Javadoc) >U Ich
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]` Gz_e
*/ ~322dG
public void sort(int[] data) { 27i<6PAC[A
MaxHeap h=new MaxHeap(); ScmzbDu
h.init(data); \c^jaK5
for(int i=0;i h.remove(); +q?0A^C>
System.arraycopy(h.queue,1,data,0,data.length); X!HSS/'
} ~ilBw:L-3
d1_*!LW$
private static class MaxHeap{ 7Z:l;%]K
!Fs)"?
void init(int[] data){ 7(iRz
this.queue=new int[data.length+1]; [B;Ek\5W
for(int i=0;i queue[++size]=data; F"? *@L
fixUp(size); !_z>w6uR
} gK_[3FiKt
} k yA(m;r
3\~fe/z'I
private int size=0; [*E.G~IS`
MBrVh6z>
private int[] queue; Pb&+(j
gG>^h1_o~
public int get() { '"p*FN
return queue[1]; 3$f5][+U
} siZ_JJW
f3B8,>
public void remove() { Fd.d(
SortUtil.swap(queue,1,size--); mK/P4]9g
fixDown(1); +W[#;)ea(
} ,+evP=(cX
file://fixdown ~TIZumGB
private void fixDown(int k) { _jKVA6_E
int j; mV]g5>Q\
while ((j = k << 1) <= size) { epyYo&x}
if (j < size %26amp;%26amp; queue[j] j++; ,B>b9,~3a
if (queue[k]>queue[j]) file://不用交换 >5W"a?(
break; YQsc(6
SortUtil.swap(queue,j,k); BkqW>[\5xm
k = j; dR{ V,H7N
} 70(?X/5#
} ZO$T/GE6%
private void fixUp(int k) { Qj[O$L0 $
while (k > 1) { |H@p^.;
int j = k >> 1; ;itg>\p3
if (queue[j]>queue[k]) eZ$1|Sj]j
break; %*}f<k{6
SortUtil.swap(queue,j,k); aBLb i
k = j; e:occT
} Vtk|WV?>P+
} izo $0
be@uHikp;v
} (j"MsCwE
>1zzDd_
} W}3vY]
EOC"a}Cq-
SortUtil： 3f8Z?[Bb@
uMZf9XUE
package org.rut.util.algorithm; (Ad!hyE(
"V2$g
import org.rut.util.algorithm.support.BubbleSort; essW,2,rjC
import org.rut.util.algorithm.support.HeapSort; [GM<Wt0
import org.rut.util.algorithm.support.ImprovedMergeSort; O,#[m:Ejb
import org.rut.util.algorithm.support.ImprovedQuickSort; ZeV)/g,w
import org.rut.util.algorithm.support.InsertSort; X|G+N(`|(
import org.rut.util.algorithm.support.MergeSort; ,BAF?}04=
import org.rut.util.algorithm.support.QuickSort; [hbIv
import org.rut.util.algorithm.support.SelectionSort; v:;cTX=x`#
import org.rut.util.algorithm.support.ShellSort; }C}_ I:=C
D3ad2vH
/** `;@4f|N9
* @author treeroot (0f^Hh wF
* @since 2006-2-2 E~^'w.1
* @version 1.0 s6uAF(4,
*/ ry"zec B
public class SortUtil { HskN(Ho
public final static int INSERT = 1; K(S/D(\ FL
public final static int BUBBLE = 2; X.<R['U&\
public final static int SELECTION = 3; Bs}>#I
public final static int SHELL = 4; '"^JNb^I
public final static int QUICK = 5; @Iu-F4YT
public final static int IMPROVED_QUICK = 6; YvX I
public final static int MERGE = 7; pM3BBF%
public final static int IMPROVED_MERGE = 8; SGm?"esEt
public final static int HEAP = 9; gG>>ynn
B?Skw{&
public static void sort(int[] data) { RkzBn
sort(data, IMPROVED_QUICK); !)34tu2
} ,vPF=wq
private static String[] name={ v'tk:Hm1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IIkJ"Qg.
}; _!7o
eHR<(8c'f
private static Sort[] impl=new Sort[]{ .>n|#XK
new InsertSort(), 9K!='u`
new BubbleSort(), @AOiZOH
new SelectionSort(), lDeWs%n
new ShellSort(), k9n93I|Cm
new QuickSort(), x#D=?/~/Kv
new ImprovedQuickSort(), ,e2va7}3
new MergeSort(), AK HH{_
new ImprovedMergeSort(), M %~kh"
new HeapSort() ZtVa*xl
}; [@6iStRg7
j7&l&)5
public static String toString(int algorithm){ /Ny&;Y
return name[algorithm-1]; Npqbxb
} bd4q/w4q
/V&Y@j
public static void sort(int[] data, int algorithm) { XJ;/kR
impl[algorithm-1].sort(data); e3K
} Xc!w y9m
_Gu ;U@
public static interface Sort { fvDwg
public void sort(int[] data); c+JlM1p@
} Ju<D7
:&m(WZ\
public static void swap(int[] data, int i, int j) { ^;a[v^&9
int temp = data; art{PV4-
data = data[j]; 4tI~d8?pk+
data[j] = temp; (]:G"W8f
} jKzjTn9{E
} |($pXVLH`