[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; C2WWS(zn
} $T\W'WR>
int i1=l; [@!.(Hp
int i2=mid+1; D&Xh|}2A
for(int cur=l;cur<=r;cur++){ q[6tvPfkX
if(i1==mid+1) H%,jB<-.A
data[cur]=temp[i2++]; w2-:!,X
else if(i2>r) <ptgFR+
data[cur]=temp[i1++]; m/,.3v
else if(temp[i1] data[cur]=temp[i1++]; @;%+Ms
else Eei"baw/
data[cur]=temp[i2++]; sFqLxSo_I
} cC{eu[ XW
} Ls8@@b,t2
)ZxDfRjL
} Xb0$BAP
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改进后的归并排序: hE|Z~5\Y,>
p.{M sn
package org.rut.util.algorithm.support; V3%"z
3;M7^DM
import org.rut.util.algorithm.SortUtil; <eU1E}BDQ
\Tf$i(0q
/** t')47k\
* @author treeroot i$~2pr
* @since 2006-2-2 N=1zhI:VaQ
* @version 1.0 AJk0jh\.j%
*/ P5u Y1(
public class ImprovedMergeSort implements SortUtil.Sort { dGxk ql
)tH.P: 1~,
private static final int THRESHOLD = 10; J~=bW\^I
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/* :}QBrd
* (non-Javadoc) BCDmce`=l
* _lWC)bv`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [E9V#J89
*/ v'R{lXE
public void sort(int[] data) { m5!~PG:_
int[] temp=new int[data.length]; ^/nj2"
mergeSort(data,temp,0,data.length-1); }ll&qb
} W'aZw9
RCXm</
private void mergeSort(int[] data, int[] temp, int l, int r) { l;*/F`>c
int i, j, k; PI KQ}aq=
int mid = (l + r) / 2; C,*3a`/2M^
if (l == r) HGuU6@~hu
return; )?5027^
if ((mid - l) >= THRESHOLD) 20 <$f
mergeSort(data, temp, l, mid); G`n|fuv
else LAe>XF-5
insertSort(data, l, mid - l + 1); N$\'X<{
if ((r - mid) > THRESHOLD) Wo&WO e
mergeSort(data, temp, mid + 1, r); =mVWfFL
else 7_OC&hhL
insertSort(data, mid + 1, r - mid); ^!Y]l
[i[*xf-B
for (i = l; i <= mid; i++) { #Tc]L<."
temp = data; a`c#- je
} 4LG[i}u.N
for (j = 1; j <= r - mid; j++) { 26SXuFJ@
temp[r - j + 1] = data[j + mid]; $w,?%i97
} C`G+b{o
int a = temp[l]; L]wWJL
int b = temp[r]; W''%{A/'
for (i = l, j = r, k = l; k <= r; k++) { ~m/nV81
if (a < b) { Xk9mJ]31LC
data[k] = temp[i++]; A -C.Bi;/
a = temp; ew13qpt)<L
} else { `ChS$p"A
data[k] = temp[j--]; mf~JolucJ
b = temp[j]; a ~s:f5S>
} j6!C/UgQ
} xwuGJ
} [ B{F(~O
v|!u]!JM
/** ;rggO0Y
* @param data /{)}y
* @param l 0bG[pp$[
* @param i Dno]N
*/ NCrNlHIF
private void insertSort(int[] data, int start, int len) { Cz1Q@<)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); / @v V^!#1
} 4>x$I9^Y!
} m:6^yfS
} Mi>!
} ZmLA4<
pZE}<EX
堆排序： QN4{xf:}S
BlLK6"gJT
package org.rut.util.algorithm.support; .uh>S!X, ]
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import org.rut.util.algorithm.SortUtil; Z\YCjs%
=3h?!$#?
/** DOaTp f
* @author treeroot C VXz>oM
* @since 2006-2-2 d4ga6N3'
* @version 1.0 9"W3t]
*/ }3825
public class HeapSort implements SortUtil.Sort{ "[wkjNf%
JXx[e
/* (non-Javadoc) Mb!b0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w3n6md
*/ W u C2LM
public void sort(int[] data) { OO?;??
MaxHeap h=new MaxHeap(); Ci-CY/]s
h.init(data); A#o ~nC<
for(int i=0;i h.remove(); <E2nM,
System.arraycopy(h.queue,1,data,0,data.length); )r0XQa]@$
} VQ R E]
YW14X
private static class MaxHeap{ x?"+Or.h
&@v&5EXOw
void init(int[] data){ R|@?6<
this.queue=new int[data.length+1]; yG' 5:
for(int i=0;i queue[++size]=data; <`Xt?K
fixUp(size); ^P!(*k#T
} JT,[;
} ;s$,}O.
9ZD>_a
private int size=0; +^6a$ N
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private int[] queue; ts:YJAu+F
Jkx_5kk/\
public int get() { r"_U-w
return queue[1]; g[c_rty
} |j2$G~B6
7DZZdH$Fm
public void remove() { }R9>1u}6
SortUtil.swap(queue,1,size--); e0"80"D
fixDown(1); ]lqe,>
} (v,g=BS,
file://fixdown !MyCxM6
private void fixDown(int k) { 9cIKi#Bl
int j; p!o?2Lbiw
while ((j = k << 1) <= size) { (rieg F
if (j < size %26amp;%26amp; queue[j] j++; qNuBK6E#4
if (queue[k]>queue[j]) file://不用交换 I.6 qA *
break; , 3&DA
SortUtil.swap(queue,j,k); Q)/oU\
k = j; EXbaijHQG
} : GdLr
} 9Ro7xSeD
private void fixUp(int k) { 9 df GV!Z
while (k > 1) { Q,LDn%+;B*
int j = k >> 1; $=9g,39
if (queue[j]>queue[k]) \S_o{0ZY}
break; :!QT ,
SortUtil.swap(queue,j,k); X:>,3[hx|
k = j; YlC$L$%Zd.
} yog(
} ?:Sqh1-z
[BTOs4f
} PJ))p6 9
3P*[!KI
} [9C{\t
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SortUtil： iu iVr$E
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package org.rut.util.algorithm; ROr|n]aJj
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import org.rut.util.algorithm.support.BubbleSort; O +u?Y
import org.rut.util.algorithm.support.HeapSort; O~OM.:al&
import org.rut.util.algorithm.support.ImprovedMergeSort; AsfmH-4)
import org.rut.util.algorithm.support.ImprovedQuickSort; nu `R(2/
import org.rut.util.algorithm.support.InsertSort; L2Fi/UWM
import org.rut.util.algorithm.support.MergeSort; (:>Sh0.
import org.rut.util.algorithm.support.QuickSort; B%I<6E[D
import org.rut.util.algorithm.support.SelectionSort; z7s}-w,
import org.rut.util.algorithm.support.ShellSort; veAdk9
Eh+m|A
/** [{q])P;
* @author treeroot tiPZ.a~k
* @since 2006-2-2 {U)q)
* @version 1.0 yIu_DFq%
*/ a_\t(U
public class SortUtil { O?f?{Jsx
public final static int INSERT = 1; u\3=m%1
public final static int BUBBLE = 2; YS bS.tq
public final static int SELECTION = 3; {%D4%X<
public final static int SHELL = 4; pG^>y0
public final static int QUICK = 5; uC|bC#;
public final static int IMPROVED_QUICK = 6; %$&_!
public final static int MERGE = 7; WS.lDMYE7
public final static int IMPROVED_MERGE = 8; QKIg5I-
public final static int HEAP = 9; MmQk@~
T2}X~A
public static void sort(int[] data) { =<X4LO)C
sort(data, IMPROVED_QUICK); GGU>={D)
} {#,?K
private static String[] name={ 2-%9k)KH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wW, n~W
}; 3~\,VO''
gLwrYG7@
private static Sort[] impl=new Sort[]{ .1:B\R((
new InsertSort(), @5h(bLEP
new BubbleSort(), ,0@QBr5P
new SelectionSort(), &&7&/
new ShellSort(), M%bD7naBq
new QuickSort(), r<[G~n
new ImprovedQuickSort(), hf:\^w
new MergeSort(), hz+c]K
new ImprovedMergeSort(), Z=beki]
new HeapSort() =J`M}BBx
}; `h~-
*{(tg~2'(
public static String toString(int algorithm){ bAEwjZ
return name[algorithm-1]; [JEf P/n|.
} AEd9H +I
9z+ZFIf7d
public static void sort(int[] data, int algorithm) { :pLaxWus!
impl[algorithm-1].sort(data); EGzlRSgO
} A3.*d:A
n^Q-K}!T/
public static interface Sort { dN@C)5pm5`
public void sort(int[] data); S])*LUi
} G5NAwpZf
Ry40:;MYN
public static void swap(int[] data, int i, int j) { jt0f*eYE8
int temp = data; j/F:j5O*
data = data[j]; sn8l3h)
data[j] = temp; J;N\q
} L]E.TvM1*
} oxug