[JAVA]用Java实现的各种排序

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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; S}0-2T[
} }lJ|nl`c
int i1=l; eDNY|}$}v
int i2=mid+1; HJ"sK5Q
for(int cur=l;cur<=r;cur++){ D(TfW
if(i1==mid+1) AOL=;z9c#
data[cur]=temp[i2++]; PV=sqLM~
else if(i2>r) &n83>Q
data[cur]=temp[i1++]; RCK*?\m5
else if(temp[i1] data[cur]=temp[i1++]; Y}yh6r;i
else 3w[uc~f
data[cur]=temp[i2++]; |@R/JGB^
} &lzCRRnvt
} tN.BI1nB
Jzy:^PObT
} $SFreyI;Uf
]eFNR1<OP
改进后的归并排序: km lb,P
a #p`l>rx
package org.rut.util.algorithm.support; X ) =-a
aGE} EK}
import org.rut.util.algorithm.SortUtil; KiC,O7&<
c1*^ \
/** "8(8]GgYx
* @author treeroot XIM?$p^
* @since 2006-2-2 Dp} $q`F[
* @version 1.0 [,~;n@jz
*/ ~:_10g]r
public class ImprovedMergeSort implements SortUtil.Sort { TDg<&ND3
XC/M:2$
private static final int THRESHOLD = 10; 6B>*v`T:
<FZ*'F*M
/* f!GFRMM1
* (non-Javadoc) QT1oUP#*
* Q4N0j' QA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wn<k"6x
*/ gMZrtK`<
public void sort(int[] data) { >k/ rJ[Sc
int[] temp=new int[data.length]; = 4'r+2[
mergeSort(data,temp,0,data.length-1); 7eZwpg?K
} Tn>L?
]`h@[fYge
private void mergeSort(int[] data, int[] temp, int l, int r) { j \#y
int i, j, k; w/(2fU(
int mid = (l + r) / 2; nAj +HLO
if (l == r) y{tM|
return; ,|UwZ_.
if ((mid - l) >= THRESHOLD) $"Ci{iE
mergeSort(data, temp, l, mid); oMq:4W,
else :FS~T[C;
insertSort(data, l, mid - l + 1); d,j)JnY3V
if ((r - mid) > THRESHOLD) gG(9&}@(
mergeSort(data, temp, mid + 1, r); #.OCoc
else "88<{xL
insertSort(data, mid + 1, r - mid); `<R^ZL,
-b )~
for (i = l; i <= mid; i++) { b|@f!lA
temp = data; 6gq`V,
} nK]L0*s
for (j = 1; j <= r - mid; j++) { f~p[izt
temp[r - j + 1] = data[j + mid]; bD1IY1
} @_;vE(!5
int a = temp[l]; np7!y U
int b = temp[r]; 7#26Smv
for (i = l, j = r, k = l; k <= r; k++) { ^7$Q"
if (a < b) { GN|xd+O_
data[k] = temp[i++]; VK}H;
a = temp; :+fW#:
} else { uH)v\Js
data[k] = temp[j--]; Nb>C5TjR
b = temp[j]; >+ Im:fD
} f+QDjJ?z
} Jy]}'eE?pr
} 6a{b%e`
eI5W; Q4
/** anUH'mcK*
* @param data N#X(gEV
* @param l >>h0(G|
* @param i XO/JnJ^B
*/ QUc&f+~
private void insertSort(int[] data, int start, int len) { nN[QUg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^JB5-EtL(
} U {sT %G
} DDU)G51>d
} $-mwr,i
} gJ5|P .
nrz2f7d$
堆排序： R%r<AL5kJk
L'x[wM0w;
package org.rut.util.algorithm.support; 0tN/P+!|
p=f8A71
import org.rut.util.algorithm.SortUtil; m'L8z fX
XSo$;q\
/** %4h$/~
* @author treeroot f\vg<lca
* @since 2006-2-2 3*<~;Z' z4
* @version 1.0 e?XQ,
*/ Hl*/s
public class HeapSort implements SortUtil.Sort{ Z<[f81hE&
$4rMYEn08
/* (non-Javadoc) +{{'3=x9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *JY2vq
*/ aK'%E3!~=x
public void sort(int[] data) { 8$6^S{M3
MaxHeap h=new MaxHeap(); !K_ ke h
h.init(data); 7|pF(sb0
for(int i=0;i h.remove(); 1}I%yOi)
System.arraycopy(h.queue,1,data,0,data.length); ?\T):o;/
} ?h|w7/9
gn4Sz")
private static class MaxHeap{ N51RBA
3*[YM7y
void init(int[] data){ 7D)i]68E
this.queue=new int[data.length+1]; mMtX:
for(int i=0;i queue[++size]=data; Bpl(s+
fixUp(size); (n~GKcA
} t3FfPV!P"
} bl`vT3
>{w"aJ" F
private int size=0; #F|w_P
8j&LU,
private int[] queue; 'wP\VCL2>
a*KJjl?k
public int get() { pksF|VS
return queue[1]; )\Ay4d
} W{*w<a_`
$_&gT.>
public void remove() { VA@t8H,
SortUtil.swap(queue,1,size--); |H@1g=q
fixDown(1); YWUCrnr
} hG%J:}
file://fixdown }SF<. A
private void fixDown(int k) { c/ABBvd|
int j; uMM?s?q
while ((j = k << 1) <= size) { "A%JT3
if (j < size %26amp;%26amp; queue[j] j++; 4"y1M=he
if (queue[k]>queue[j]) file://不用交换 `q(eB=6;[
break; v`KYhqTUl
SortUtil.swap(queue,j,k); \>GHc}
k = j; *u`[2xmuYf
} o+.LG($+U
} v6_fF5N/
private void fixUp(int k) { 9)]asY
while (k > 1) { ~xP4}gs1
int j = k >> 1; fp2.2 @[
if (queue[j]>queue[k]) I2<t?c:Pn<
break; p$OkWSi~
SortUtil.swap(queue,j,k); f<aJiVP
k = j; ^SH8*7l7
} Dwp-*QK^G
} O!#bM< *
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} 3Zeh$DZ
bQu1L>c,Uw
} 2n8spLZYGY
Iw-3Z'hOX
SortUtil： %N }0,a0
j6{9XIRo_
package org.rut.util.algorithm; :")iS?l
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import org.rut.util.algorithm.support.BubbleSort; ,"Nfo`7
import org.rut.util.algorithm.support.HeapSort; ag\xwS#i5H
import org.rut.util.algorithm.support.ImprovedMergeSort; NU?05sF
import org.rut.util.algorithm.support.ImprovedQuickSort; 12MWO_'g8
import org.rut.util.algorithm.support.InsertSort; MehMhHY
import org.rut.util.algorithm.support.MergeSort; wnoL<p
import org.rut.util.algorithm.support.QuickSort; @z1Yj"^Pm
import org.rut.util.algorithm.support.SelectionSort; gu~F(Fb'
import org.rut.util.algorithm.support.ShellSort; v*k}{M
1'{A,!
/** /kKF|Hg`c
* @author treeroot 'qT[,iQ
* @since 2006-2-2 9EqU 2~
* @version 1.0 1:r8p6
*/ +8\1.vY
public class SortUtil { !E+.(
public final static int INSERT = 1; g1TMyIUt[
public final static int BUBBLE = 2; Tf1G827
public final static int SELECTION = 3; bx&?EUx+b
public final static int SHELL = 4; ndU<,{r
public final static int QUICK = 5; UX& ?^]
public final static int IMPROVED_QUICK = 6; )k}UjU`!
public final static int MERGE = 7; >SR!*3$5
public final static int IMPROVED_MERGE = 8; chr^>%Q_
public final static int HEAP = 9; D[ -Gzqh
p Y[dJxB
public static void sort(int[] data) { c8cPGm#i
sort(data, IMPROVED_QUICK); jRCG}'
} }JePEmj
private static String[] name={ (s2ke
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R8U?s/*
}; g*nh8
"}(g3Iy
private static Sort[] impl=new Sort[]{ k;bdzcMkQ
new InsertSort(), z|:3,$~sN
new BubbleSort(), j~@Hj$APa`
new SelectionSort(), IyfhVk?
new ShellSort(), 1\'zq;I~
new QuickSort(), <$]=Vaq
new ImprovedQuickSort(), #M5R>&?Jqz
new MergeSort(), Nhnw'9
new ImprovedMergeSort(), dq&N;kk |
new HeapSort() g_l=z`,8
}; ~j&#DG&L
`X06JTqf:
public static String toString(int algorithm){ Ur/+nL{
return name[algorithm-1]; 3+j!{tJ z2
} a$r<%a6
L(bYG0ZI5C
public static void sort(int[] data, int algorithm) { (` N@4w=
impl[algorithm-1].sort(data); XpH]CF
} SQ_w~'(
l6wN&JHTh
public static interface Sort { nYc8+5CcK'
public void sort(int[] data); g]hTz)8fF
} Xj^Hy"HC^~
'8$*gIQ8
public static void swap(int[] data, int i, int j) { E~y@ue:
int temp = data; O_u2V'jy9
data = data[j]; FXi"o $N
data[j] = temp; B7^*xskH
} e{"r3*
} mjwh40x.o