[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; ]1 jhy2j
} \4KV9wm
int i1=l; aH_0EBRc
int i2=mid+1; +i~kqiy.
for(int cur=l;cur<=r;cur++){ 8shx7"
if(i1==mid+1) B|"-Ed
data[cur]=temp[i2++]; {kghZur
else if(i2>r) Vb)NWXmyu
data[cur]=temp[i1++]; aL&nD1f=!-
else if(temp[i1] data[cur]=temp[i1++]; 20]p<
else ?IG[W+M8
data[cur]=temp[i2++]; s o7.$]aV
} t,u;"%go
} Kk).KgR
"QvTn=
} N F,<^ u
CiV^bYi
改进后的归并排序: @R Jr ~y0
r=/$}l4
package org.rut.util.algorithm.support; ^'n;W<\p)
Q*hXFayx
import org.rut.util.algorithm.SortUtil; "Hk7s+%
SZUo RWx
/** /E!N:g<
* @author treeroot 7h.fT`
* @since 2006-2-2 J@OK"%12
* @version 1.0 q8!]x-5$6j
*/ YkbuyUui
public class ImprovedMergeSort implements SortUtil.Sort { *c>B-Fo/D
#;=sJ[m4
private static final int THRESHOLD = 10; Tol"D2cyf
~RH)iI
/* cua( w
* (non-Javadoc) ,n2"N5{jw
* "A> _U<Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \ B'AXv6
*/ S0tkqA4
public void sort(int[] data) { 0g;)je2_2?
int[] temp=new int[data.length]; Z]w?RL
mergeSort(data,temp,0,data.length-1); qLPuKIF
} 1ASoH,D/
91-[[<
private void mergeSort(int[] data, int[] temp, int l, int r) { 4hxa|f
int i, j, k; iuA_Jr
int mid = (l + r) / 2; v o4U%
if (l == r) K $WMrp
return; +4Fw13ADE
if ((mid - l) >= THRESHOLD) Q/q>mN"#1
mergeSort(data, temp, l, mid); +i#s |kKs\
else wD:2sri
insertSort(data, l, mid - l + 1); :cf#Tpq"
if ((r - mid) > THRESHOLD) r@}8TE*|P
mergeSort(data, temp, mid + 1, r); !L@<?0xLW
else gLRDd~H
insertSort(data, mid + 1, r - mid); Ylyk/
;XQ27,K&
for (i = l; i <= mid; i++) { kZ PL$\/A
temp = data; CvR-lKV<
} %@:6&
for (j = 1; j <= r - mid; j++) { =\k:]
temp[r - j + 1] = data[j + mid]; [$F*R@,&
} ~N2=44e
int a = temp[l]; t .}];IJP
int b = temp[r]; ~ToU._
for (i = l, j = r, k = l; k <= r; k++) { do*aE
if (a < b) { D&@Iuo
data[k] = temp[i++]; ?bpVdm!
a = temp; -:kIIK
} else { J"Fp),
data[k] = temp[j--]; M[+#*f.T}
b = temp[j]; Yep~C%/}
} jSSEfy>^
} 'F#dv[N
} V/:2xT
Rt:^'Qi$!
/** ];jp)P2o
* @param data O"/Sv'|H#
* @param l 2[;~@n1P
* @param i ,p#r; O<O
*/ o@7U4#E
private void insertSort(int[] data, int start, int len) { c%bzrYQvA;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !{{gL=_@
} |fIyq}{7
} dWY{x47
} m@u%3*:
} mYj)![
tj*/%G{Y
堆排序： +KD7Di91<K
;4(}e{
package org.rut.util.algorithm.support; x7Gf):,LK
ktS^^!,l%
import org.rut.util.algorithm.SortUtil; L|}s Z\2!
[[w |
/** l^$'6q"
* @author treeroot $:\`E56\
* @since 2006-2-2 5KDCmw
* @version 1.0 )0]U"Nf ho
*/ UG=]8YY!
public class HeapSort implements SortUtil.Sort{ |2%|=
<5,|h3]-#
/* (non-Javadoc) ]31=8+D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y9>92#aME
*/ 'n ^,lXWB
public void sort(int[] data) { 7(oA(l1V
MaxHeap h=new MaxHeap(); VX82n,'=t
h.init(data); TVx `&C+
for(int i=0;i h.remove(); "wuO[c&%/
System.arraycopy(h.queue,1,data,0,data.length); jd,i=P%
} %q~q,=H$]
fm`V2'Rm
private static class MaxHeap{ A)V*faD
01n132k
void init(int[] data){ y4LUC;[n
this.queue=new int[data.length+1]; ggiy{CdR
for(int i=0;i queue[++size]=data; <9piKtb|L
fixUp(size); lSW'qgh
} IM7<z,*oF
} z#ki# o
*z)gSX
private int size=0; ,[t?$Cy;
c{_JPy
private int[] queue; 6 Bdxdx*zt
%Zbm%YaW5
public int get() { /PeT4hW}
return queue[1]; eU@Mv5&6
} tpC^68*F
V=dOeuYd
public void remove() { g2m*Q%
SortUtil.swap(queue,1,size--); 0 p?AL=
fixDown(1); fK+ 5
} pjX=:K|
file://fixdown KYtCN+vsG
private void fixDown(int k) { -4sKB>b
int j; <R;wa@a>
while ((j = k << 1) <= size) { _^NaP
if (j < size %26amp;%26amp; queue[j] j++; 6%ofS8[
if (queue[k]>queue[j]) file://不用交换 $Seh4
break; @+H0D"
SortUtil.swap(queue,j,k); l EzN
k = j; zfv@<'
} H@Ot77(*
} fn=A_ i
private void fixUp(int k) { VOZxLyj^9
while (k > 1) { w5{l-Z
int j = k >> 1; \20}/&
if (queue[j]>queue[k]) 9\<q=p~
break; 3 dJ362
SortUtil.swap(queue,j,k); !cYID \}S,
k = j; X,_K )f
} 0bM_EC
} %" 7UYLX
-` ViuDX=
} =g!Pw]
{yWL|:#K
} VOM@x%6#c
MiIxj%,(
SortUtil： 2Kz$y JTp
vN\[2r%S
package org.rut.util.algorithm; V%PQlc.X
?o?$HK
import org.rut.util.algorithm.support.BubbleSort; H"8B4~*7H
import org.rut.util.algorithm.support.HeapSort; tEvDAI} 5
import org.rut.util.algorithm.support.ImprovedMergeSort; 9N'fU),I
import org.rut.util.algorithm.support.ImprovedQuickSort; T+&fUhSy
import org.rut.util.algorithm.support.InsertSort; t_w\k_ T
import org.rut.util.algorithm.support.MergeSort; -43>?m/a
import org.rut.util.algorithm.support.QuickSort; 6>rz=yAM_
import org.rut.util.algorithm.support.SelectionSort; U364'O8_
import org.rut.util.algorithm.support.ShellSort; m^!j)\sM5
ufIvvZ*
/** BJWlx*U]
* @author treeroot 9!Q ZuZY
* @since 2006-2-2 (k #xF"yI
* @version 1.0 t^"8M6BqC;
*/ v$Fz^<Na
public class SortUtil { T`fT[BaY
public final static int INSERT = 1; #jg-q|nd
public final static int BUBBLE = 2; ,^8':X"A{!
public final static int SELECTION = 3; `1(ED= |
public final static int SHELL = 4; _Ffg"xoC
public final static int QUICK = 5; "WQ6[;&V
public final static int IMPROVED_QUICK = 6; ]zaTX?F:
public final static int MERGE = 7; t-KicLr
public final static int IMPROVED_MERGE = 8; _$c o Y
public final static int HEAP = 9; .,xyE--;d
sV,Yz3E<u$
public static void sort(int[] data) { x4c|/}\)*
sort(data, IMPROVED_QUICK); aYT!xdCI
} ~LpkA`Hn!
private static String[] name={ \DS*G7.A+&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g:)iEw>a
}; LX7P?j
|~ fI=1;;x
private static Sort[] impl=new Sort[]{ qS@3:R
new InsertSort(), tm.60udbo
new BubbleSort(), {{Ox%Zm
new SelectionSort(), 3=sBe HL
new ShellSort(), k+-?b(z)$
new QuickSort(), {c9 fv H
new ImprovedQuickSort(), #J&3Zds
new MergeSort(), 5tpC$4m
new ImprovedMergeSort(), AZc=Bbh
new HeapSort() By8SRWs
}; ;!S5P(
U'ctO%
public static String toString(int algorithm){ 2K};-}eW
return name[algorithm-1]; 5["3[h
} 5uQ+'*xN%
c.Hw K\IU
public static void sort(int[] data, int algorithm) { D1ZyJs#
impl[algorithm-1].sort(data); }i"[5:
} $Bz};@
XH~(=^/_
public static interface Sort { 4bA^Gq
public void sort(int[] data); 7:?\1a
} FqA4 OU
AaA!U!B
public static void swap(int[] data, int i, int j) { {24>&<p
int temp = data; }W}(k2r
data = data[j]; l$\2|D
data[j] = temp; v:4j3J$z
} ; >H1A
} CYy=f-