[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; /~w*)e)
} r^}0qO,XM
int i1=l; B os`+Y
int i2=mid+1; .Iqqjk
for(int cur=l;cur<=r;cur++){ {%u^O/M
if(i1==mid+1) `x/i1^/_@
data[cur]=temp[i2++]; x>Q% hl
else if(i2>r) 5)T[ha77u
data[cur]=temp[i1++]; [znN'Fg:"
else if(temp[i1] data[cur]=temp[i1++]; 03v+eT
else j;@a~bks6z
data[cur]=temp[i2++]; MWA,3I\.
} 9;p5z[jI
} {c9 fv H
#J&3Zds
} YZ+G7D>
AZc=Bbh
改进后的归并排序: trwQ@7
EA>.SSs!
package org.rut.util.algorithm.support; >9A18xC
C{85#`z`
import org.rut.util.algorithm.SortUtil; sED"}F)
rP7 QW)NF
/** c86KDEF
* @author treeroot uq s
* @since 2006-2-2 !'^l}K>
* @version 1.0 4jebx jZ
*/ p4f9v:b[
public class ImprovedMergeSort implements SortUtil.Sort { 7Qd$@ m
yjL+1_"B
private static final int THRESHOLD = 10; w=;>
06^/zr
/* ^.8~}TT-U
* (non-Javadoc) A1+:y,wXs
* GWuKDq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G)I` M4}*n
*/ }6-olVg
public void sort(int[] data) { Yft [)id
int[] temp=new int[data.length]; C}mhnU@
mergeSort(data,temp,0,data.length-1); ,H+Y1N4W(
} :FI D,
;UTM9.o[
private void mergeSort(int[] data, int[] temp, int l, int r) { i,<'AL )
int i, j, k; Itr4Pr
int mid = (l + r) / 2; '[liZCg
if (l == r) J^jd@E
return; &"K_R(kN
if ((mid - l) >= THRESHOLD) GxD`M2
mergeSort(data, temp, l, mid); #;ObugY,
else {f-O~P<Z4
insertSort(data, l, mid - l + 1); W%>T{}4
if ((r - mid) > THRESHOLD) mA$y$73=T
mergeSort(data, temp, mid + 1, r); ?j/FYi
else |8CxMs
insertSort(data, mid + 1, r - mid); %Hd[,duwO
\;~Nj#
for (i = l; i <= mid; i++) { LEPLoF3,
temp = data; *4%pXm;
} EOu[X'gLr
for (j = 1; j <= r - mid; j++) { ) dk|S\
temp[r - j + 1] = data[j + mid]; q`r| DcN~
} v%cCJ SO#
int a = temp[l]; B_ict)}ld
int b = temp[r]; !xck ~EAS
for (i = l, j = r, k = l; k <= r; k++) { Z[*unIk
if (a < b) { p=nbsS~":
data[k] = temp[i++]; 5Z_C(5)/Y
a = temp; zTB&Wlt
} else { u>9` ?O44
data[k] = temp[j--]; C\5G43`
b = temp[j]; QyVAs;
} )S+fc=
} vx($o9
} XjL3Ar*
yYJ_;Va
/** J1I,;WGf
* @param data _"@:+f,
* @param l Up?RN%gq
* @param i <!>\ n\A
*/ H5Eso*v@
private void insertSort(int[] data, int start, int len) { P#V!hfM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G1jj:]1
} e&ysj:W5 "
} *`"+J_
} #'1dCh vZ
} 2mzn{S)nV
P05`DX}r,
堆排序： -V{"Lzrfug
7d%x7!E
package org.rut.util.algorithm.support; kqih`E9P7B
Skci;4T(
import org.rut.util.algorithm.SortUtil; 1}la)lC
k^;n$r"i5
/** qA)YYg/G
* @author treeroot s$pXn&:
* @since 2006-2-2 8&8!(\xv
* @version 1.0 <9X@\uvU.<
*/ yR|2><A
public class HeapSort implements SortUtil.Sort{ uFSU|SDd.
_-({MX[3k<
/* (non-Javadoc) kQbZ!yl>[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }ZVond$y4
*/ b)'CP Cu*
public void sort(int[] data) { eg/itty
MaxHeap h=new MaxHeap(); WlQCPC
h.init(data); @;OsHudd
for(int i=0;i h.remove(); c|.te]!ds
System.arraycopy(h.queue,1,data,0,data.length); rmA?Xlh\
} d*{Cv2A.
l,h`YIy
private static class MaxHeap{ W>a}g[Ad
YRVh[Bqg`
void init(int[] data){ qI7KWUR
this.queue=new int[data.length+1]; j H2)8~P
for(int i=0;i queue[++size]=data; -(?/95 Y
fixUp(size); @-[}pZ/
} FtyT:=Kpc
} /xJD/"Y3&
w*XM*yJHU
private int size=0; &6OY^6<
nE8z1hBUq
private int[] queue; "|Q.{(|kO1
E<+ G5j
public int get() { ~{lb`M^]h
return queue[1]; :5/Ue,~ag
} EF:ec9 .
dlfjx
public void remove() { 5&Yt=)c\
SortUtil.swap(queue,1,size--); zs]ubJC@
fixDown(1); sc+%v1Y#}
} J@/4CSCR]
file://fixdown xwZ1Q,'C
private void fixDown(int k) { \0 h>!u
int j; 18NnXqe-m
while ((j = k << 1) <= size) { ")MHP~ ?
if (j < size %26amp;%26amp; queue[j] j++; kbb!2`F!%
if (queue[k]>queue[j]) file://不用交换 gq+0t
break; J8S$YRZ_
SortUtil.swap(queue,j,k); T2Z$*;,>T
k = j; HI|egf@
} =nCA=-Jv
} dj(&"P
private void fixUp(int k) { -(TC'
while (k > 1) { .TA)|df ^
int j = k >> 1; El9T>!Z
if (queue[j]>queue[k]) 5r 4~vK
break; .Xp,|T
SortUtil.swap(queue,j,k); ZPw4S2yw3.
k = j; c\o_U9=n
} WMC^G2 n
} 3G4WKg.^
1W>/4l
} h?dSn:Y\?
j}.gK6Yq*
} Uzvd*>mv
j%` C
SortUtil： @uyQH c,V
&q|vvF<G
package org.rut.util.algorithm; W[J2>`k9
0-uj0"r`
import org.rut.util.algorithm.support.BubbleSort; yT OZa-
import org.rut.util.algorithm.support.HeapSort; tZ62T{, a
import org.rut.util.algorithm.support.ImprovedMergeSort; =I'iD0eR
import org.rut.util.algorithm.support.ImprovedQuickSort; I>.pkf<V
import org.rut.util.algorithm.support.InsertSort; Td|,3 n
import org.rut.util.algorithm.support.MergeSort; BEb?jRMjLg
import org.rut.util.algorithm.support.QuickSort; Xxh^4vKjX
import org.rut.util.algorithm.support.SelectionSort; Awfd0L;9
import org.rut.util.algorithm.support.ShellSort; =Ks&m4
UNb7WN
/** TU_'1
* @author treeroot 0cB]:*W
* @since 2006-2-2 WDxcV%
* @version 1.0 yWZ_
*/ kXhd]7ru
public class SortUtil { `TO Xktj
public final static int INSERT = 1; hb*Y-$Zp
public final static int BUBBLE = 2; XHJdynt/
public final static int SELECTION = 3; gKTCfD~
public final static int SHELL = 4; e}2?)B`[
public final static int QUICK = 5; A7YCSjB
public final static int IMPROVED_QUICK = 6; {91Y;p C
public final static int MERGE = 7; <#BK(W~$
public final static int IMPROVED_MERGE = 8; y]{b4e
public final static int HEAP = 9; 51eZfJB
A*0X~6W
public static void sort(int[] data) { K3:z5j.X
sort(data, IMPROVED_QUICK); ]~ N.
} "Fmq$.$%
private static String[] name={ M/W9"N[ta
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *sp")h#Z
}; wE1GyN
/>Zfx.Aj6
private static Sort[] impl=new Sort[]{ &#C&0f8PnD
new InsertSort(), r|}Pg}O
new BubbleSort(), 7<70\6
new SelectionSort(), 5,XEN$^
new ShellSort(), }!fIY7gv
new QuickSort(), a+z>pV|
new ImprovedQuickSort(), p\_3g!G'
new MergeSort(), 2|ee`"`
new ImprovedMergeSort(), X n0HJ^"_
new HeapSort() Yf[Cmn
}; $G0e1)D
%9zpPrWF
public static String toString(int algorithm){ DmgDhNXKq
return name[algorithm-1]; v,Kum<oi?
} k"[AV2UW1
1^NC=IS9z
public static void sort(int[] data, int algorithm) { 6%t6u3
impl[algorithm-1].sort(data); h-(NWxK+
} tpzWi W/
g0jfLv
public static interface Sort { ~-sgk"$
public void sort(int[] data); ozS'n]8*
} S`[(y?OF?
2IHS)kkT|
public static void swap(int[] data, int i, int j) { L=#B>Eu
int temp = data; s'tXb=!HO
data = data[j]; H{E(=S
data[j] = temp; F',1R"/}
} PQ!'<
} "(H%m9K