[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; 1vBXO bk
} pEE.%U
int i1=l; F4Gv=q)Z
int i2=mid+1; '`Z5.<n7p
for(int cur=l;cur<=r;cur++){ {o[*S%Z"
if(i1==mid+1) Cc,,e`
data[cur]=temp[i2++]; rt\4We,7
else if(i2>r) h=~TgTv
data[cur]=temp[i1++]; #}!Ge
else if(temp[i1] data[cur]=temp[i1++]; c`&<"Us
else !_gHIJiq}
data[cur]=temp[i2++]; ZjXpMx,
} 3v%V\kO=F
} EWg\\90
<Cw)S8t
} 4HK#]M>yz
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改进后的归并排序: +H~})PeQ
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package org.rut.util.algorithm.support; v [ 4J0
@nS+!t{
import org.rut.util.algorithm.SortUtil; V}kZowWD
G? "6[w/p
/** 5l"v:Px
* @author treeroot /u8m|S<
* @since 2006-2-2 !7lS=D(?
* @version 1.0 >h7qI-
*/ /K9Tn
public class ImprovedMergeSort implements SortUtil.Sort { y ZsC>
5[Yzi> o[
private static final int THRESHOLD = 10; 64>o3Hb2
/-l7GswF
/* {\L /?#
* (non-Javadoc) IOsitMOX:
* 4` gAluJ#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [huS"1
*/ 1/YWDxo,
public void sort(int[] data) { bi bjFg
int[] temp=new int[data.length]; vo[Zuv?<h
mergeSort(data,temp,0,data.length-1); $!x8XpR8s
} x\Bl^1&
^{GnEqml&
private void mergeSort(int[] data, int[] temp, int l, int r) { X99:/3MXB'
int i, j, k; .ns1;8
int mid = (l + r) / 2; >c>f6
if (l == r) hp]T^
return; Z`23z(+
if ((mid - l) >= THRESHOLD) 54w..8'
mergeSort(data, temp, l, mid); Lh6G"f(n
else ;_GS<[A3
insertSort(data, l, mid - l + 1); Wej8YF@
if ((r - mid) > THRESHOLD) uFIr.U$V
mergeSort(data, temp, mid + 1, r); ^E8XPK]-~
else @O/-~,E68
insertSort(data, mid + 1, r - mid); Ax4nx!W,
'@h5j6:2
for (i = l; i <= mid; i++) { YAqv:
temp = data; gh3XC.&
} %+U.zd$
for (j = 1; j <= r - mid; j++) { H\7Qf8s|{
temp[r - j + 1] = data[j + mid]; p*8LS7UT
} z )2h\S
int a = temp[l]; {(i>$RG_
int b = temp[r]; +v3@WdLcD
for (i = l, j = r, k = l; k <= r; k++) { :e5)Q=lX
if (a < b) { #=@( m.k:s
data[k] = temp[i++]; C&b^TLe
a = temp; W~J@v@..4
} else { ON|Bpt2Qp
data[k] = temp[j--]; A=/|f$s+
b = temp[j]; vlAYKtl3]
} y-gSal
} :yo tpa
} V^WR(Q}
TpLlbsd
/** "k(Ee
* @param data n5X0Gi9
* @param l /AX1LYlr
* @param i K)c`G_%G
*/ %Uj7g>
private void insertSort(int[] data, int start, int len) { q[#2`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uI^E9r/hB
} ;H5PiSq;z
} /pZ]:.A
} \-Mzs 0R
} mdW8RsR
V8w!yc
堆排序： 1H{M0e
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package org.rut.util.algorithm.support; A\9QgM
R87-L*9B^0
import org.rut.util.algorithm.SortUtil; M/XxiF
!j,LS$tPu
/** #;?j]npg]
* @author treeroot 7{ zkqug
* @since 2006-2-2 \*Roa&<!
* @version 1.0 `x2Q:&.H`
*/ Q%61_l
public class HeapSort implements SortUtil.Sort{ <\<[J0
_Gv[ D
/* (non-Javadoc) S3rN]!B+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rnvKfTpZDU
*/ @0cQ4}
public void sort(int[] data) { #%t&f"j2
MaxHeap h=new MaxHeap(); og<mFbqkq7
h.init(data); C 7)w8y
for(int i=0;i h.remove(); X#KC<BXw,
System.arraycopy(h.queue,1,data,0,data.length); <<}t&qE%2%
} Fp52|w_
]RgLTqv4x
private static class MaxHeap{ ],l w
n4Od4&r
void init(int[] data){ iq_y80g`8h
this.queue=new int[data.length+1]; EY=`/~|c
for(int i=0;i queue[++size]=data; @giJ&3S,
fixUp(size); t .*z)N
} B@Acm
} z DDvXz
5}d"nx
private int size=0; gPs%v`y)*D
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private int[] queue; `NqX{26GV+
dHp(U :)
public int get() { o";5@NH
return queue[1]; xxWrSl`fB
} /XtpGk_1)
%a-*Ku
public void remove() { n#,<-Rb-
SortUtil.swap(queue,1,size--); =SJwCT0;
fixDown(1); QJ2V&t"3
} d4OWnPHv&}
file://fixdown ck-ab0n
private void fixDown(int k) { @Sb 86Ee
int j; +X)n}jh
while ((j = k << 1) <= size) { d1YE$
if (j < size %26amp;%26amp; queue[j] j++; HAa2q=
if (queue[k]>queue[j]) file://不用交换 oxkA+}^j8M
break; !QK~l
SortUtil.swap(queue,j,k); *7.EL`8
k = j; 6% +s`
} <xOv0B
} T~B'- >O
private void fixUp(int k) { o4I&?d7;"
while (k > 1) { N|cWTbi
int j = k >> 1; >_3+s~
if (queue[j]>queue[k]) 2$8#ePyq*
break; P|mV((/m4
SortUtil.swap(queue,j,k); 2 MFGKzO
k = j; *~b3FLzq
} :2#8\7IU^'
} 2n}nRv/'
9GdQ$^m
} %YjZF[P
cR.[4rG'
} F0,-7<G
N<bNJD}
SortUtil： Pe_mX*0
?@W=bJ8{
package org.rut.util.algorithm; ,0ZkE}<=w
\wW'Hk=
import org.rut.util.algorithm.support.BubbleSort; ^zjQ(ca@"x
import org.rut.util.algorithm.support.HeapSort; uMW5F-~-+
import org.rut.util.algorithm.support.ImprovedMergeSort; M XB fX
import org.rut.util.algorithm.support.ImprovedQuickSort; @o&.]FZs
import org.rut.util.algorithm.support.InsertSort; Gt{'` P,&9
import org.rut.util.algorithm.support.MergeSort; xi5/Wc6
import org.rut.util.algorithm.support.QuickSort; WU oGIT'
import org.rut.util.algorithm.support.SelectionSort; /9/svPc]
import org.rut.util.algorithm.support.ShellSort; ;DWtCtD
Yv0;UKd
/** qkX}pQkG)h
* @author treeroot s':fv[%
* @since 2006-2-2 H`!%"
* @version 1.0 YDEUiZ~
*/ ejY|o Bj
public class SortUtil { 4 I}xygV
public final static int INSERT = 1; ~_vzss3-C
public final static int BUBBLE = 2; z:PH _N~
public final static int SELECTION = 3; PVBf'
public final static int SHELL = 4; 8ut:cCrmg
public final static int QUICK = 5; b?&=gm%oU
public final static int IMPROVED_QUICK = 6; zPwU'TbF
public final static int MERGE = 7; ['F,
public final static int IMPROVED_MERGE = 8; `V N $ S
public final static int HEAP = 9; "]BefvE
4fe$0mye
public static void sort(int[] data) { /($!("b
sort(data, IMPROVED_QUICK); <.c@l,[.z
} JDO5eEwj
private static String[] name={ Y,1sNg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }Ip"j]h
}; "zJGYBen
>AcpJ|V
private static Sort[] impl=new Sort[]{ 9A]XuPAlh
new InsertSort(), QInow2/u
new BubbleSort(), ]s lYr8m
new SelectionSort(), $)OUOv
new ShellSort(), h'8w<n+%)
new QuickSort(), }NQx2k0
new ImprovedQuickSort(), l@}BWSx&ms
new MergeSort(), Ve<3XRq|8
new ImprovedMergeSort(), -BWkPq!
new HeapSort() !A>VzW
}; Y~=]RCg
[oOA@
public static String toString(int algorithm){ #A|~s;s>N
return name[algorithm-1]; .hh2II
} )3i}(h0
I0\}S [+H
public static void sort(int[] data, int algorithm) { -"L)<J@gQ?
impl[algorithm-1].sort(data); QiU!;!s
} "Fv6u]Rv
X8T7(w<0%f
public static interface Sort { R#Z1+&='
public void sort(int[] data); FrSeR9b
} a$p2I+lX
/f!_dJ^
public static void swap(int[] data, int i, int j) { #k%3Ag
int temp = data; )2Gp3oD?
data = data[j]; {},rbQ -
data[j] = temp; zdA:K25"
} =l`xXma
} 1XZ|}Xz