[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; B }6Kd
} &g*klt'B
int i1=l; OI~}e,[2z
int i2=mid+1; 3H1Pp*PH
for(int cur=l;cur<=r;cur++){ E;9Z\?P
if(i1==mid+1) %)pP[[h
data[cur]=temp[i2++]; %/P=m-K
else if(i2>r) N g58/}zO
data[cur]=temp[i1++]; S*4f%!
else if(temp[i1] data[cur]=temp[i1++]; 3"5.eZSOW
else ;xL67e%?
data[cur]=temp[i2++]; R"NGJu9
} T'hml
} aw1P5aPmX
S2ark,sp6
} TW>?h=.z
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改进后的归并排序: 0[.3Es:_
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package org.rut.util.algorithm.support; mn.`qfMh
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import org.rut.util.algorithm.SortUtil; S0F@#mSQ?
]5N zK=2{
/** `"B^{o
* @author treeroot kg:l:C)Tq
* @since 2006-2-2 ?gLAWz
* @version 1.0 T:U4:"
*/ ;J'OakeVO
public class ImprovedMergeSort implements SortUtil.Sort { ?!H)zz6y
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private static final int THRESHOLD = 10; }?J~P%HpF
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/* n? ]f@OR
* (non-Javadoc) Z9xR
* PT+c&5AS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A';n6ne%i
*/ [yC"el6PM
public void sort(int[] data) { rhIGOk1k
int[] temp=new int[data.length]; ~Zmi(Ra
mergeSort(data,temp,0,data.length-1); O] H=s
} ) oxIzF
Q<yAT(w
private void mergeSort(int[] data, int[] temp, int l, int r) { =5Wp&SM6
int i, j, k; x<@kjfm5
int mid = (l + r) / 2; o!utZmk$
if (l == r) ,%Z&*n
return; k-Fdj5/
if ((mid - l) >= THRESHOLD) C3)|<E
mergeSort(data, temp, l, mid); ;R!*I%
else jN6b*-2
insertSort(data, l, mid - l + 1); "J!}3)n
if ((r - mid) > THRESHOLD) |!Fk2Je,
mergeSort(data, temp, mid + 1, r); sMm/4AY]
else )v1CC..
insertSort(data, mid + 1, r - mid); H|`R4hAk
2e.N"eLNt
for (i = l; i <= mid; i++) { ~:EW>Fq%i
temp = data; @!<d0_dnC
} _f3 WRyN0
for (j = 1; j <= r - mid; j++) { SdxY>;
temp[r - j + 1] = data[j + mid]; Vho0eV=
} 9 mPIykAj8
int a = temp[l]; i3PKqlp.
int b = temp[r]; 8*s7m
for (i = l, j = r, k = l; k <= r; k++) { @rwU 1T33
if (a < b) { q}wj}t#
data[k] = temp[i++]; 9cfR)*Q
a = temp; kaQ2A
} else { J &{xP8uq_
data[k] = temp[j--]; Z>2]Xx% \
b = temp[j]; LeHiT>aX!
} 7F(5)Utt
} <GF@L
} $"8d:N?I[
n+;vjVS%
/** _faJB@a_
* @param data I60DUuF
* @param l //.>>-~1m
* @param i XdsJwn F
*/ =nU/ [T.
private void insertSort(int[] data, int start, int len) { QU/3X 1W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O?ktWHUx
} i2PZ'.sL
} >uy%-aXiVa
} _]|Qec)
} u9]1X1wV
-$YJfQE6G
堆排序： = .`jjDJ
`#6x=24
package org.rut.util.algorithm.support; S LGW:
{QQl$ys/
import org.rut.util.algorithm.SortUtil; vPmnN^
Mo^`\/x!
/** 4D"4zp7
* @author treeroot ;%zC@a~{
* @since 2006-2-2 qn"K9k
* @version 1.0 H}nJbnU
*/ SDBt @=Nl
public class HeapSort implements SortUtil.Sort{ EJm4xkYLj1
CWlW/>yF B
/* (non-Javadoc) ue0s&WF|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H+l,)Se
*/ GGnp Pp
public void sort(int[] data) { Eg8i _s~:
MaxHeap h=new MaxHeap(); WRpyr
h.init(data); };S0 G!
for(int i=0;i h.remove(); 'fY9a(Xt.
System.arraycopy(h.queue,1,data,0,data.length); lS9n@
} Gvx[8I
M"wue*&
private static class MaxHeap{ fKkjn4&W
T20VX 8gX
void init(int[] data){ Tbf:eVIG
this.queue=new int[data.length+1]; '*!L!VJ
for(int i=0;i queue[++size]=data; _H\<[-l
fixUp(size); CAgaEJhX3
} \Tm}mAvK/o
} &s VadOBQ
: F9|&q-W,
private int size=0; )2.)3w1_4
)Yj%#
private int[] queue; "JT;gaEm
4/*q0M{}B
public int get() { OJ,m1{9$}
return queue[1]; C}"@RHEu
} UI?=]"
FvXqggfGv
public void remove() { 5H !y46z
SortUtil.swap(queue,1,size--); Mv|!2 [:
fixDown(1); BD*G1k_q
} -dRFA2Y
file://fixdown $p$dKH
private void fixDown(int k) { JN[0L:
int j; e!X(yJI[O6
while ((j = k << 1) <= size) { VLI'
if (j < size %26amp;%26amp; queue[j] j++; O\Eqr?%L)
if (queue[k]>queue[j]) file://不用交换 eegx'VSX4
break; jP=Hf=:$
SortUtil.swap(queue,j,k); n=!uNu7
k = j; o"q+,"QL
} OW5t[~y]
} VmvQvQ/9R
private void fixUp(int k) { $3;Upgv
while (k > 1) { FFcB54ALTf
int j = k >> 1; r>|-2}{N/
if (queue[j]>queue[k]) ;YH[G;aJ
break; 2<r\/-#pU
SortUtil.swap(queue,j,k); ai-n z-;
k = j; mTf<
} Qvqqvk_tv
} s&tE_
:b/J\
} SvuTc!$?
K1q+~4>\|
} =r4!V>
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SortUtil： (03pJV&K
Zi ESlf$
package org.rut.util.algorithm; Q*ju sm
k$"d^*R
import org.rut.util.algorithm.support.BubbleSort; &|o$=Ad
import org.rut.util.algorithm.support.HeapSort; WeJ@xL
import org.rut.util.algorithm.support.ImprovedMergeSort; <+U|dX
import org.rut.util.algorithm.support.ImprovedQuickSort; r o\1]`6
import org.rut.util.algorithm.support.InsertSort; E4oz|2!m
import org.rut.util.algorithm.support.MergeSort; 'Pd(\$ZY
import org.rut.util.algorithm.support.QuickSort; pGGmA;TC1
import org.rut.util.algorithm.support.SelectionSort; B$a-og(
import org.rut.util.algorithm.support.ShellSort; jAhP> t:
gNj7@bX~
/** h5~n 1qX
* @author treeroot SreYJT%
* @since 2006-2-2 {=Q7m`1
* @version 1.0 {6,|IGAq V
*/ /iQ(3F
public class SortUtil { M"Y0jQ(
public final static int INSERT = 1; = !2NU
public final static int BUBBLE = 2; "&o,yd%
public final static int SELECTION = 3; %,V YiW0
public final static int SHELL = 4; Jfhk@27T
public final static int QUICK = 5; *I*i>==Z
public final static int IMPROVED_QUICK = 6; [0@`wZ
public final static int MERGE = 7; 6(V /yn~
public final static int IMPROVED_MERGE = 8; HEF?mD3h
public final static int HEAP = 9; L8$1K&!
[xlIG}e9
public static void sort(int[] data) { EtJ8^[u2J
sort(data, IMPROVED_QUICK); 2KJ1V+g@a6
} 6ghx3_%w
private static String[] name={ vfc[p ^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l]LxL
}; Wch~Yb
ot%.M*h-
private static Sort[] impl=new Sort[]{ V%ii3
new InsertSort(), </~ 6f(mg
new BubbleSort(), F2I 5qC/
new SelectionSort(), 3'I^lc
new ShellSort(), @cvP0A
new QuickSort(), =t0tK}Y+4
new ImprovedQuickSort(), a:rX9-**
new MergeSort(), d j5hv~
new ImprovedMergeSort(), J ++v@4Z
new HeapSort() J5p8nmb
}; 0BU=)Swku
NTs7KSgZ
public static String toString(int algorithm){ |i%2%V#
return name[algorithm-1]; S/A1RUt
} 8/%6@Y"Y*
4mYCSu14:`
public static void sort(int[] data, int algorithm) { y0bq;(~X~
impl[algorithm-1].sort(data); _k66Mkd#b
} 2a=sm1?
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public static interface Sort { m]Y;c_DO:
public void sort(int[] data); Gs0H@
} f i~I@KJ>
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public static void swap(int[] data, int i, int j) { XVVD 0^ Q
int temp = data; f'En#-?O
data = data[j]; 0DPxW8Y-`
data[j] = temp; ,I.WX,OR
} ,?cH"@RJ
} U7$WiPTNL9