[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; /.ZaE+
} M:|/ijpN
int i1=l; 8A/>JD3^
int i2=mid+1; ;Q90Y&{L=$
for(int cur=l;cur<=r;cur++){ TcZN%
if(i1==mid+1) H-a^BZ&iU
data[cur]=temp[i2++]; -A;w$j6*
else if(i2>r) "^"'uO$
data[cur]=temp[i1++]; @XBH.A^7r
else if(temp[i1] data[cur]=temp[i1++]; q)oN2-
else E\!n49
data[cur]=temp[i2++]; >Z"9rF2SW
} +S0u=u65
} EIK*49b2
6+ANAk
} ,i![QXZ
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改进后的归并排序: Q?]w{f(
^srs$ w]
package org.rut.util.algorithm.support; Mdm0g
*H*\gaSh
import org.rut.util.algorithm.SortUtil; F(0Z ]#+
GC?S];PL
/** g< )72-h
* @author treeroot lPp6 pVr
* @since 2006-2-2 "G kI5!
* @version 1.0 NDW8~lkL
*/ "aA_(Ydzj
public class ImprovedMergeSort implements SortUtil.Sort { Xq%*#)M;
O\JD,w
private static final int THRESHOLD = 10; jJ-d/"(
V0T<eH<
/* oT!/J
* (non-Javadoc) 9<Ag1l
* z5ZKks
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C2.W[T
*/ jMqx
public void sort(int[] data) { kYtHX~@
int[] temp=new int[data.length]; ,4yG(O$)
mergeSort(data,temp,0,data.length-1); 9 P~d:'Ib
} `{L{wJ:&a
OaNc9c"
private void mergeSort(int[] data, int[] temp, int l, int r) { ?q6Z's[
int i, j, k; d/4ubf+$k
int mid = (l + r) / 2; )^(P@D.L
if (l == r) 8.-S$^hj~6
return; g~|y$T
if ((mid - l) >= THRESHOLD) OsB?1;:
mergeSort(data, temp, l, mid); soxfk+ 9
else 6~3jn+K$1
insertSort(data, l, mid - l + 1); }M?|,N6
if ((r - mid) > THRESHOLD) {YBl:rMz
mergeSort(data, temp, mid + 1, r); 'DeW<Sa~
else a>?p.!BM
insertSort(data, mid + 1, r - mid); LhZZc`|7t
YPG,9iZ&f
for (i = l; i <= mid; i++) { <oZ(ng@X
temp = data; A$N+9n\
} lh~<s2[R2
for (j = 1; j <= r - mid; j++) { !^]q0x
temp[r - j + 1] = data[j + mid]; b.@H1L
} F/xCG nP-
int a = temp[l]; l_ZO^E~D_
int b = temp[r]; >^;(c4C
for (i = l, j = r, k = l; k <= r; k++) { /!-J53K
if (a < b) { *afejjW[
data[k] = temp[i++]; A ^-Z)0:
a = temp; yW{mK
} else { *b:u*`@
data[k] = temp[j--]; X;(oz]tr$
b = temp[j]; 3]!h{_:u
} YK7\D:
} %kJh6J
} nZ541o@t9
xl|ghjn
/** $\0TD7p
* @param data OCwW@OC +
* @param l \4/:^T}*
* @param i gu^_iU
*/ sD2*x T
private void insertSort(int[] data, int start, int len) { :wSJ-\'$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y~x#pC*w
} |1lf(\T_
} 87+.pM|t%
} F:M/z#:~
} fJvr+4i4k
J-b~4
堆排序： %l%=Dkss
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package org.rut.util.algorithm.support; QN3qF|))
\)p4okpR
import org.rut.util.algorithm.SortUtil; ^4RO
~d&'Lp[3
/** Tm%WWbc
* @author treeroot aD?# ,
* @since 2006-2-2 ;,mBT[_ZO
* @version 1.0 ?rAi=w&c
*/ !~?W \b\:
public class HeapSort implements SortUtil.Sort{ -e &$,R>;
=jsx(3V
/* (non-Javadoc) sE^ns\&QP=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =.VepX|?D
*/ Th.3j's
public void sort(int[] data) { yB 1I53E
MaxHeap h=new MaxHeap(); !?S5IGLOj
h.init(data); FK-}i|di
for(int i=0;i h.remove(); wEZ,49
System.arraycopy(h.queue,1,data,0,data.length); >-UD]?>
} H]Y#pLu|
i<'{Y
private static class MaxHeap{ ~K4k'
$,}Qf0(S
void init(int[] data){ mgk64}K[n
this.queue=new int[data.length+1]; +[>yO _}
for(int i=0;i queue[++size]=data; jG =(w4+
fixUp(size); A1mYkG)l
} f&=K]:WDe
} @gs26jX~2}
37J\i ]
private int size=0; 0Ddn@!J*
u4go*#
private int[] queue; JqL<$mSep
]lymY _ >
public int get() { &uv>'S#%
return queue[1]; =%Q\*xaR.W
} t^`<*H
luJ{Iq
public void remove() { We[<BJo4
SortUtil.swap(queue,1,size--); |3s.;wK
fixDown(1); m]bL)]Z
} dVasm<lZ
file://fixdown '~ jy
private void fixDown(int k) { hVQ7'@
int j; 9m%7dsv
while ((j = k << 1) <= size) { %{N>c:2I$
if (j < size %26amp;%26amp; queue[j] j++; L+v8E/W
if (queue[k]>queue[j]) file://不用交换 NvXj6U*%
break; |U8>:DEl
SortUtil.swap(queue,j,k); 6lB{Ao?|
k = j; {KF7j63
} nL 1IS
} XMjI}SPG
private void fixUp(int k) { p=:7 atE
while (k > 1) { N{?Tm`""
int j = k >> 1; "r5'lQI
if (queue[j]>queue[k]) [{hLF9yPx
break; 6^7)GCq [
SortUtil.swap(queue,j,k); U'JP1\
k = j; Y9z:xE
} s98: *o3
} D<+ bzC
U)&H.^@r$
} $M:4\E5(
&.|;yt%v
} BsoFQw4$9
Y2RxD\!Z
SortUtil： 'DaNR`9
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package org.rut.util.algorithm; H}u)%qY+~
F?yh23&_4
import org.rut.util.algorithm.support.BubbleSort; <) >gg!
import org.rut.util.algorithm.support.HeapSort; |[lxV&SD.
import org.rut.util.algorithm.support.ImprovedMergeSort; KUl Zk^a
import org.rut.util.algorithm.support.ImprovedQuickSort; , V0iMq
import org.rut.util.algorithm.support.InsertSort; ` 4s#5g
import org.rut.util.algorithm.support.MergeSort; >=Rd3dgDG
import org.rut.util.algorithm.support.QuickSort; &4ug3
import org.rut.util.algorithm.support.SelectionSort; }w|=c>'_}
import org.rut.util.algorithm.support.ShellSort; G#_(7X&
{[(W4NAlH
/** Zq2H9^![y~
* @author treeroot 7v4-hfN
* @since 2006-2-2 B1 jH.(
* @version 1.0 +oxqS&$L
*/ I(iGs I
public class SortUtil { cG~_EX$
public final static int INSERT = 1; $S"zxEJJ Y
public final static int BUBBLE = 2; 7;$L&X
public final static int SELECTION = 3; zD#+[XI]K
public final static int SHELL = 4; _BeX7
public final static int QUICK = 5; #=)?s 8T
public final static int IMPROVED_QUICK = 6; }[hDg6i
public final static int MERGE = 7; y$;zTH_6j
public final static int IMPROVED_MERGE = 8; |zr)hC
public final static int HEAP = 9; S%a}ip&
<9MQ
public static void sort(int[] data) { 2_ZHJ,r
sort(data, IMPROVED_QUICK); Z;dwn~Tw
} u:{. Hn`
private static String[] name={ B4M'Er{v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bt`r6v;\
}; FHnHhB[
ni02N3R
private static Sort[] impl=new Sort[]{ lzQ&)7`
new InsertSort(), fR{WS:Pv
new BubbleSort(), ":ws~Zep
new SelectionSort(), =^".{h'-
new ShellSort(), ^HU=E@
new QuickSort(), m-pIFL<^N
new ImprovedQuickSort(), I{X@<o}
new MergeSort(), \C'I l w
new ImprovedMergeSort(), vp9E}ga
new HeapSort() C9^elcdv
}; )Sh;UW
Qg8eq_m(
public static String toString(int algorithm){ U%SNROj
return name[algorithm-1]; O.m.]%URW
} k%bTs+]*
(HP={MrV
public static void sort(int[] data, int algorithm) { "p_[A
impl[algorithm-1].sort(data); 5"Xo R)
} nG(|7x
::Ve,-0
public static interface Sort { :[$i~V
public void sort(int[] data); `:^)"#z)
} XQ?)
&`9bGO
public static void swap(int[] data, int i, int j) { 9"l%tq_
int temp = data; &b#NF1Q.
data = data[j]; D\i8rqU/l
data[j] = temp; rH9|JEz
} Y_ u7 0@`
} 7[VCCI g