[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; dG>Wu o
} OCO,-(
int i1=l; EJaaW&>[
int i2=mid+1; u6I0<i_KZ
for(int cur=l;cur<=r;cur++){ X1[R*a/p
if(i1==mid+1) ;To+,`?E;q
data[cur]=temp[i2++]; '3UIriY6
else if(i2>r) x ETVtq
data[cur]=temp[i1++]; soQzIx
else if(temp[i1] data[cur]=temp[i1++]; ;:\,x
else GVc[p\h(
data[cur]=temp[i2++]; | ,l=v`/
} I u~aTgHX%
} QqK{~I|l
VE"0VB.
} `)!2E6 =
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改进后的归并排序: C+]q
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package org.rut.util.algorithm.support; \v P2B
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import org.rut.util.algorithm.SortUtil; *o\Y~U-so
dms:i)L2
/** zV(tvt
* @author treeroot i~Ob( YIH
* @since 2006-2-2 2N8sq(LK{
* @version 1.0 ^@LhUs>3
*/ V?V)&y] 4
public class ImprovedMergeSort implements SortUtil.Sort { Nw$[a$^n
KYmWfM3^
private static final int THRESHOLD = 10; l)rvh#D
bb0McEQy
/* (T#(A4:6S
* (non-Javadoc) ocA'goI-
* ?r'TH/>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yZ~eLWz
*/ IJBJebqL
public void sort(int[] data) { p<0kmA<B/
int[] temp=new int[data.length]; )>X|o$2
mergeSort(data,temp,0,data.length-1); . I&)MZ>n
} +yP[(b/
)bCG]OM7<
private void mergeSort(int[] data, int[] temp, int l, int r) { >7(~'#x8A"
int i, j, k; 0@e}hv;
int mid = (l + r) / 2; bR8 HGH28
if (l == r) PxVI{:Uz
return; )3`
if ((mid - l) >= THRESHOLD) EBDC'^
mergeSort(data, temp, l, mid); xX&>5 "
else zEPx
insertSort(data, l, mid - l + 1); z1SMQLk
if ((r - mid) > THRESHOLD) rb}wv16?
mergeSort(data, temp, mid + 1, r); 23\j1?
else 77&^$JpM
insertSort(data, mid + 1, r - mid); 400Tw`AiJ
G0;EbJ/&
for (i = l; i <= mid; i++) { WP@JrnxO\`
temp = data; vrm{Ql&
} .1z$ A
for (j = 1; j <= r - mid; j++) { J.e8UQ@=5
temp[r - j + 1] = data[j + mid]; D@rn@N
} qvfAG 0p
int a = temp[l]; @a.6?.<L
int b = temp[r]; Uygw*+
for (i = l, j = r, k = l; k <= r; k++) { U3|&Jee
if (a < b) { $G-N0LV
data[k] = temp[i++]; ox\B3U%`p}
a = temp; fBWJ%W
} else { 5Du>-.r
data[k] = temp[j--]; hDD~,/yVxs
b = temp[j]; y5AXL5
} +%le/Pg@
} X~)V)'R
} \A3>c|
Ky'3z"
/** THbtu*El
* @param data 32bkouq
* @param l v-7Rb)EP
* @param i gSv[4,hXd
*/ L%o65
private void insertSort(int[] data, int start, int len) { 8W1K3[Jj<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .y;\puNq
} 9OQ0Yc!3
} kP}hUrDX5
} Fyh?4!/.
} -M>K4*%K
5}d/8tS
堆排序： SN[L4}{
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package org.rut.util.algorithm.support; g@k#J"Q'[
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import org.rut.util.algorithm.SortUtil; ]4 K1%ZV
.n)!ZN
/** az\<sWb#
* @author treeroot ,yM}]pwlB
* @since 2006-2-2 b5n]Gp
* @version 1.0 ].k+Nzf_
*/ $xUzFLh=`
public class HeapSort implements SortUtil.Sort{ B.Zm$JZ:
veX"CY`hn
/* (non-Javadoc) z*dQIC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) * Y%<b86U
*/ !0!U01SWa
public void sort(int[] data) { Hn#GS9d_?
MaxHeap h=new MaxHeap(); C`yvBt40r
h.init(data); u^aFj%}]L
for(int i=0;i h.remove(); EZ%w=
System.arraycopy(h.queue,1,data,0,data.length); {w |dM#
} Z92iil;t
Bg 7j5
private static class MaxHeap{ jIx8k8
O2`oe4."vd
void init(int[] data){ I+Ncmg )>
this.queue=new int[data.length+1]; Z#OhYm+y
for(int i=0;i queue[++size]=data; F}6DB*
fixUp(size); X6LhM
} !cEbzb
} eq@am(#&kY
<THZ2`tTK3
private int size=0; d}{LM!s
)h>\05|T
private int[] queue; ,]PyDq6
i}/e}s<-6
public int get() { (|0.m8D~D
return queue[1]; BR& Aq
} hzT{3YtY2
nabBU4;h
public void remove() { 99l>CYXd
SortUtil.swap(queue,1,size--); /~3N@J
fixDown(1); y*VQ]aJ
} zb>f;[
file://fixdown P"(z jG9-
private void fixDown(int k) { heE}_,$|
int j; ia%z+:G
while ((j = k << 1) <= size) { @uI?
if (j < size %26amp;%26amp; queue[j] j++; (O)\#%,@R
if (queue[k]>queue[j]) file://不用交换 {fGd:2dh
break; B ~fSMB6h
SortUtil.swap(queue,j,k); g>2aIun_Q
k = j; N$\ bg|v
} doP$N3Zm
} % v;e
private void fixUp(int k) { w)+wj[6 E
while (k > 1) { ?PBa'g
int j = k >> 1; :J^qjAV
if (queue[j]>queue[k]) z$JX'(<Z7
break; +hE',i.
SortUtil.swap(queue,j,k); bA}AD`5
k = j; {Ge+O<mD
} v8ba~
} 2 ;JQX!
Vy-28icZ`
} '3A+"k-}mh
2O eshkE
} K(<$.
8zhBA9Y#~
SortUtil： y }\r#"Z`
x^A7'ad0
package org.rut.util.algorithm; ""co6qo#>
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import org.rut.util.algorithm.support.BubbleSort; >\V6+$cNp
import org.rut.util.algorithm.support.HeapSort; ]UDd :2yt
import org.rut.util.algorithm.support.ImprovedMergeSort; q[7CPE0n
import org.rut.util.algorithm.support.ImprovedQuickSort; 9<yAQ?7L
import org.rut.util.algorithm.support.InsertSort; *)u?~r(F
import org.rut.util.algorithm.support.MergeSort; bS>R5*Zp
import org.rut.util.algorithm.support.QuickSort; HF"Eys
import org.rut.util.algorithm.support.SelectionSort; >~_Jq|KBB
import org.rut.util.algorithm.support.ShellSort; 6+.>5e
a:85L!~:l
/** *HR+a#o
* @author treeroot 9B /s
* @since 2006-2-2 >lrhHU
* @version 1.0 8zY)J#
*/ .*BA 1sjE
public class SortUtil { #~L!pKM
public final static int INSERT = 1; 5sCFzo<=vh
public final static int BUBBLE = 2; ;HDZ+B
public final static int SELECTION = 3; v?L
public final static int SHELL = 4; "!O1j r;
public final static int QUICK = 5; >c<pDNt?
public final static int IMPROVED_QUICK = 6; z v>Oh#
public final static int MERGE = 7; e@E17l-
public final static int IMPROVED_MERGE = 8; _a](V6
public final static int HEAP = 9; )l&D]3$6K
zh\$t]d<I
public static void sort(int[] data) { c!It^*
sort(data, IMPROVED_QUICK); B MM--y@
} ',7a E@PJ
private static String[] name={ zJ+3g!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "+)K |9T#
}; B{C_hy-fw
iK#/w1`
private static Sort[] impl=new Sort[]{ ldGojnS
new InsertSort(), wJe?t$ac?
new BubbleSort(), UUeB;'E+
new SelectionSort(), >c4/?YV
new ShellSort(), _T5)n=|
new QuickSort(), ?s?$d&h
new ImprovedQuickSort(), =7%oE[
new MergeSort(), V|'1tB=;*1
new ImprovedMergeSort(), !nd*W"_gQ/
new HeapSort() qi(*ty
}; b7HffO O
d H? ScXM=
public static String toString(int algorithm){ .Pe9_ZH$W
return name[algorithm-1]; ZtK\HDdp
} Gh}yb-$N`&
0w %[
public static void sort(int[] data, int algorithm) { UL( lf}M
impl[algorithm-1].sort(data); D'b#,a;V
} %T!J$a)qf
?P/AC$:|I
public static interface Sort { 6BocGo({
public void sort(int[] data); tu0aD%C
} \}5p0.=
d,0 }VaY=D
public static void swap(int[] data, int i, int j) { PE"v*9k
int temp = data; Ya#h'+}
data = data[j]; paW@\1Q
data[j] = temp; .$!{-v[
} eS'yGY0b
} fKHE;A*>%