[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; ;VWAf;U;B
} fFc/ d(
int i1=l; Uw47LP
int i2=mid+1; St e=&^
for(int cur=l;cur<=r;cur++){ )E~79!
if(i1==mid+1) >%wLAS",w
data[cur]=temp[i2++]; tg{H9tU;
else if(i2>r) =Q.^c.sw
data[cur]=temp[i1++]; u9N 1pZ~
else if(temp[i1] data[cur]=temp[i1++]; >Z1sb n
else u,&^&0K,
data[cur]=temp[i2++]; v8y1b%
} L21VS ,#I
} b[`Yi1^]%g
B>2tZZko
} at)~]dG
f"<O0Qw
改进后的归并排序: xP[n
/n>qCuw
package org.rut.util.algorithm.support; ^k9kJ+x^S2
K"r*M.P>
import org.rut.util.algorithm.SortUtil; 0(S"{Ov
?]*^xL;x?
/** &}A[x1x06)
* @author treeroot gSh+}r<7
* @since 2006-2-2 M8tRjNWS?
* @version 1.0 ~J P=T
*/ 1R,:
public class ImprovedMergeSort implements SortUtil.Sort { vvm0t"|\
|9B.mBoX
private static final int THRESHOLD = 10; m%76i;uP
~8]NK&J
/* 7x@A%2J
* (non-Javadoc) YxP&7oq
* ^Y'HaneoM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >"C,@cN}B
*/ h@[R6G|
public void sort(int[] data) { R00eisd
int[] temp=new int[data.length]; )BwjZMJ.N
mergeSort(data,temp,0,data.length-1); .,OVzW
} sD=n95`v
$g sxO!G
private void mergeSort(int[] data, int[] temp, int l, int r) { {HCzp,Y
int i, j, k; Rp5#clsy
int mid = (l + r) / 2; ?#45wC
if (l == r) 7Zh~lM
return; |>#{[wko
if ((mid - l) >= THRESHOLD) f\jLqZY
mergeSort(data, temp, l, mid); G%s2P.cd
else Iu <?&9t
insertSort(data, l, mid - l + 1); F F|FU<
if ((r - mid) > THRESHOLD) Pqn@ST
mergeSort(data, temp, mid + 1, r); O)jWZOVp >
else ,]d,-)KX8
insertSort(data, mid + 1, r - mid); f`;j:O
uB]b}"+l
for (i = l; i <= mid; i++) { >M`CVUf
temp = data; bdc&1I$
} s#WAR]x0x
for (j = 1; j <= r - mid; j++) { bLwAXW2K+
temp[r - j + 1] = data[j + mid]; iB498t
} 3J5!oF{H
int a = temp[l]; ^3UGV*Ypk
int b = temp[r]; 2'W<h)m)z
for (i = l, j = r, k = l; k <= r; k++) { >Vwc3d
if (a < b) { hK_LEwd;
data[k] = temp[i++]; <?@NRFTe
a = temp; rsy'q(N[
} else { F 9@h|#an
data[k] = temp[j--]; sn)3ZA
b = temp[j]; zaK#Z?V}
} {$wjO7Glp
} D`$hPYK|_
} c|#8T*`C
o/+13C
/** SF>c\eTtx
* @param data +Nt2 +Y:O
* @param l |%' nVxc4r
* @param i b4QI)z
*/ IkGfnXJ
private void insertSort(int[] data, int start, int len) { J%,*isEL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |563D#?cR
} [@5Ytv H
} 5.MGaU^Z$
} ;ShJi
} |v$JCU3!A
H kQ)n3
堆排序： TL}++e 7+
(G[ *|6m
package org.rut.util.algorithm.support; )3>hhuaa
{qN 5MsY
import org.rut.util.algorithm.SortUtil; c1E'$- K@
6x%h6<#xh*
/** id1s3b;
* @author treeroot ,&R/4:I
* @since 2006-2-2 -}KC=,]vh
* @version 1.0 @*6 C=LL
*/ w.?:SD
public class HeapSort implements SortUtil.Sort{ WjlZ6g2i
/N&CaH\;^$
/* (non-Javadoc) a+%6B_|\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /JWGifH
*/ ybY]e; v*O
public void sort(int[] data) { ;e1ku|>$
MaxHeap h=new MaxHeap(); M)2VcDy
h.init(data); <|SRe6m
for(int i=0;i h.remove(); b)e *$)
System.arraycopy(h.queue,1,data,0,data.length); y9>ZwYN
} ~2gG(1%At9
%3ICI
private static class MaxHeap{ ]hFW73FV
hMykf4
void init(int[] data){ v#U"pn|M
this.queue=new int[data.length+1]; H*$jc\ dC
for(int i=0;i queue[++size]=data; i:OK8Q{VI
fixUp(size); 6jC`8l:
} Bg|5KOnd
} 4X+ifZO
Y07ZB'K
private int size=0; !'cl"\h
5'X ]k@m_
private int[] queue; K*X_FJ
P_Gw-`L5T
public int get() { RT.D"WvT
return queue[1]; -UOj>{-
} "O%gFye
q)^Jj?W
public void remove() { A m>cd;
SortUtil.swap(queue,1,size--); Fd[zDz
fixDown(1); jhb6T ?}
} 3%(N[&LU
file://fixdown id2j7|$,
private void fixDown(int k) { F7O(Cy"1
int j; -bSSP!f
while ((j = k << 1) <= size) { Nw1#M%/!r!
if (j < size %26amp;%26amp; queue[j] j++; A^y|J`k|
if (queue[k]>queue[j]) file://不用交换 }wHW7SJ
break; 6{^E{go
SortUtil.swap(queue,j,k); Is{KN!Hw
k = j; 5*,f Fib
} u (em&M
} &8g?4v
private void fixUp(int k) { LQngK7>
while (k > 1) { 6 1F(<!
int j = k >> 1; 93` AWg/T
if (queue[j]>queue[k]) 3v5%y'
break; X;"Sx#U
SortUtil.swap(queue,j,k); >JC
k = j; iC98_o_9
} f;xkT
} y&?6FY
C'o64+W^
} !3 f?:M
=[@zF9
} oaoU _V
?6fnpGX@a
SortUtil： @AIaC-,~]
M>i9i-dU
package org.rut.util.algorithm; >76\nGO
\4-"L>
import org.rut.util.algorithm.support.BubbleSort; OeS\7
import org.rut.util.algorithm.support.HeapSort; ng_^
import org.rut.util.algorithm.support.ImprovedMergeSort; #w\~&0
import org.rut.util.algorithm.support.ImprovedQuickSort; }l],.J\BGX
import org.rut.util.algorithm.support.InsertSort; 7:)n$,31FW
import org.rut.util.algorithm.support.MergeSort; s3R(vd
import org.rut.util.algorithm.support.QuickSort; %sX$nmi3
import org.rut.util.algorithm.support.SelectionSort; =p=rg$?
import org.rut.util.algorithm.support.ShellSort; d\ 1Og\U|A
Fpa_qjL;
/** :F{:Z*Fi0
* @author treeroot ;I}kQ!q
* @since 2006-2-2 q(.:9A*0
* @version 1.0 06N}k<10O
*/ !,Va(E|=
public class SortUtil { X@LRsg
public final static int INSERT = 1; -/g B|J
public final static int BUBBLE = 2; CJJzCVj
public final static int SELECTION = 3; :QB<?HaS'
public final static int SHELL = 4; 9&` 2V
public final static int QUICK = 5; b/{t|io{
public final static int IMPROVED_QUICK = 6; .tzG_
public final static int MERGE = 7; hR Ue<0o:
public final static int IMPROVED_MERGE = 8; [5+}rwm&W
public final static int HEAP = 9; QUQu^p
~XWQhIAM4
public static void sort(int[] data) { lJis~JLd`
sort(data, IMPROVED_QUICK); ;[u%_
} obNqsyc77R
private static String[] name={ p|&Yku=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /5:bvg+
}; g#t[LI9(F[
}7 c[Q($K
private static Sort[] impl=new Sort[]{ \V*xWS
new InsertSort(), .5y+fL
new BubbleSort(), 1r]IogI
new SelectionSort(), ;bLEL"x%
new ShellSort(), WzF !6n!h
new QuickSort(), h9Y%{v
new ImprovedQuickSort(), C@L$~iG
new MergeSort(), ,~OwLWi-|X
new ImprovedMergeSort(), kT'u1q$3Vo
new HeapSort() 0QOBL'{7)
}; .b6VQCS~9
s#tZg
public static String toString(int algorithm){ 0iwZT&O
return name[algorithm-1]; kAC&S!n
} lo,$-bJ,<,
h_T7% #0
public static void sort(int[] data, int algorithm) { %]8qAtV^3j
impl[algorithm-1].sort(data); |>JS!NM I
} U2wbvXr5-
LG1r]2
public static interface Sort { )Hk3A$6(
public void sort(int[] data); Hr]h Jc
} nw<&3k(g}
iCcB@GlA
public static void swap(int[] data, int i, int j) { }XSfst5-H
int temp = data; HAJ7m!P
data = data[j]; 8peDI7[|
data[j] = temp; \DD0s8
} thvYL.U:
} q11>f