[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; #86=[*Dr
} hh1 ?/
int i1=l; >%?kp[
int i2=mid+1; .:U`4->E
for(int cur=l;cur<=r;cur++){ s{:l yp
if(i1==mid+1) Z6S?xfhr'{
data[cur]=temp[i2++]; Mnx')([;W
else if(i2>r) S!r,p};
data[cur]=temp[i1++]; p3q >a<
else if(temp[i1] data[cur]=temp[i1++]; Fs}vI~}
else MKPw;@-
data[cur]=temp[i2++]; pFW^
} !!we4tWq
} -H+<81"B#
)/{zTg8$?/
} =U- w!uW
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改进后的归并排序: #JD:i%
oj'a%mx
package org.rut.util.algorithm.support; a:V2(nY
2Vwv#NAV k
import org.rut.util.algorithm.SortUtil; v&]k8Hc-
P =jRof$
/** wa f)S=
* @author treeroot ":meys6t#
* @since 2006-2-2 Gkr?M^@K
* @version 1.0 }9FAM@x1K&
*/ iS@+qWo1
public class ImprovedMergeSort implements SortUtil.Sort { sPxDo?1x-
U{[ g"_+~
private static final int THRESHOLD = 10; ^OZ*Le
E8LZ% N#
/* d H ;
* (non-Javadoc) S!@h\3d8{
* 4F=cER6l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /qwl;_Jcf
*/ rQLl[a
public void sort(int[] data) { CUI\:a-
int[] temp=new int[data.length]; 8TH fFL
mergeSort(data,temp,0,data.length-1); a@v}j&
} @GyxOc@6
I8%Uyap{
private void mergeSort(int[] data, int[] temp, int l, int r) { CEXD0+\q
int i, j, k; ar[I| Q_
int mid = (l + r) / 2; Tfow_t}\
if (l == r) Pz77\DpFi
return; BufXnMh.
if ((mid - l) >= THRESHOLD) ;RUod .x
mergeSort(data, temp, l, mid); EU,f;H
else e{6I-5`|,#
insertSort(data, l, mid - l + 1); ygo4.
if ((r - mid) > THRESHOLD) A}l+BIt
mergeSort(data, temp, mid + 1, r); ui .riD[,O
else Q| _e=
insertSort(data, mid + 1, r - mid); E},^,65
h( V:-D
for (i = l; i <= mid; i++) { PO@b9O
temp = data; ~bnyk%S o
} VoG:3qN
for (j = 1; j <= r - mid; j++) { 69iY)Ob/
temp[r - j + 1] = data[j + mid]; cME|Lg(J$
} {?YBJnG}x
int a = temp[l]; u_*DS-
int b = temp[r]; (O-.^VV
for (i = l, j = r, k = l; k <= r; k++) { $TZjSZ1w
if (a < b) { [yn\O=%5
data[k] = temp[i++]; \NF5)]:
a = temp; b sM]5^
} else { m#Dae\w&
data[k] = temp[j--]; /BQB7vL
b = temp[j]; De^Uc
} uWjSqyb:
} )C&'5z
} <_ruVy0]
{Lg]chJq?
/** ;%a
* @param data 8:gUo8
* @param l =pnMV"'9
* @param i kdW$>Jqb
*/ B }t529Z
private void insertSort(int[] data, int start, int len) { - U Elu4n&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ejh0Wfl
} X"EZpJ'W
} N_liKhq
} kesuM3
} C;\R 62'
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堆排序： 1a]QNl_x
UNF@%O4_T
package org.rut.util.algorithm.support; DcRvZH
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import org.rut.util.algorithm.SortUtil; ]y\Wc0q
E]c0+rh~
/** }l<:^lX
* @author treeroot ko+fJ&$
* @since 2006-2-2 TMw6 EM
* @version 1.0 }MIg RQ9
*/ X0 ^~`g
public class HeapSort implements SortUtil.Sort{ EN/r{Cm$B
mhW*rH*m
/* (non-Javadoc) }Hy4^2B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /*1p|c^
*/ ! z6T_;s
public void sort(int[] data) { vJ9IDc|[
MaxHeap h=new MaxHeap(); /I48jO^2
h.init(data); {JlSfJw!
for(int i=0;i h.remove(); qtlcY8!
System.arraycopy(h.queue,1,data,0,data.length); L]Dq1q8`
} A/TCJ#>l
CNl @8&R
private static class MaxHeap{ wBI>H 7A
A/sM ?!p>_
void init(int[] data){ &HB!6T/
this.queue=new int[data.length+1]; :y1,OR/k
for(int i=0;i queue[++size]=data; #5yz~&
fixUp(size); HAmAmEc,
} FjV)QP H
} V/Q/Ujgg
((AIrE>Rr
private int size=0; [9d4 0>e
`Rx\wfr}
private int[] queue; %V|n2/O Y
/2>.*H_2
public int get() { NnRX0]
return queue[1]; &a!MT^anA~
} !X4m6gRaP
CLgfNrW~
public void remove() { uN@El1ouY
SortUtil.swap(queue,1,size--); k"F\4M
fixDown(1); S0w:R:q}L
} `5 Iaz
file://fixdown #pnB+h&tE
private void fixDown(int k) { KD`*[.tT
int j; #c$z&J7e
while ((j = k << 1) <= size) { y`\rb<AZ*t
if (j < size %26amp;%26amp; queue[j] j++; gTb%c84
if (queue[k]>queue[j]) file://不用交换 .~,=?aq^
break; -T2w?|
SortUtil.swap(queue,j,k); O"~CZh,:r}
k = j; KnC:hus
} F$@(0c
} |+Cd2[hN
private void fixUp(int k) { )1gOO{T]h?
while (k > 1) { 0y`r.)G
int j = k >> 1; 9@>Q7AUCQ
if (queue[j]>queue[k]) nLY(%):(P
break; zALtG<_t
SortUtil.swap(queue,j,k); 3c+ps;nh
k = j; Ya;y@44
} IG90mpLX
} 9`td_qh
)Wy:I_F351
} ttA'RJ
&AnWMFo
} p^)w$UL}}
LRqlK\
SortUtil： j8W<iy
0M!GoqaA
package org.rut.util.algorithm; C."\ a_p
;: 0<(!^*
import org.rut.util.algorithm.support.BubbleSort; k:8NOx|s"
import org.rut.util.algorithm.support.HeapSort; t"?)x&dS
import org.rut.util.algorithm.support.ImprovedMergeSort; sBa&]9>m
import org.rut.util.algorithm.support.ImprovedQuickSort; @plh'f}
import org.rut.util.algorithm.support.InsertSort; M{g.x4M@W
import org.rut.util.algorithm.support.MergeSort; Zp/$:ny
import org.rut.util.algorithm.support.QuickSort; 3z% W5[E)
import org.rut.util.algorithm.support.SelectionSort; `(M0I!t
import org.rut.util.algorithm.support.ShellSort; 0i(c XB
^s\T<;
/** 4{ [d '-H5
* @author treeroot 5c$\DZ(
* @since 2006-2-2 `_SV1|=="8
* @version 1.0 Z8`Y}#Za[
*/ uM,R+)3
public class SortUtil { -z">ov-)
public final static int INSERT = 1; 1 %8JMq\
public final static int BUBBLE = 2; 3F32 /_`
public final static int SELECTION = 3; OMAvJzK .
public final static int SHELL = 4; $r)NL
public final static int QUICK = 5; n(W&GSj|u9
public final static int IMPROVED_QUICK = 6; [l}H%S
public final static int MERGE = 7; ART0o7B
public final static int IMPROVED_MERGE = 8; BS3{TGn
public final static int HEAP = 9; m(`O>zS
=w/AJ%6
public static void sort(int[] data) { 3_"tds <L
sort(data, IMPROVED_QUICK); 06z+xxCo
} aSMoee@!
private static String[] name={ hQeG#KQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ax*xa6_2
}; mrBK{@n
e~geBlLar
private static Sort[] impl=new Sort[]{ j/;wxKW
new InsertSort(), ]f>0P3O5&
new BubbleSort(), pKU(4&BxX
new SelectionSort(), x@3cZd0j#
new ShellSort(), EiVVVmm!
new QuickSort(), _&r19pY
new ImprovedQuickSort(), Ol;DJV
new MergeSort(), (4|R}jv
new ImprovedMergeSort(), n`V?n
new HeapSort() D!z'Y,.
}; 5+UNLvsZ
-$$mrU
public static String toString(int algorithm){ <H$!OPV
return name[algorithm-1]; LtUvFe
} W#2} EX
/ ;+Mz*
public static void sort(int[] data, int algorithm) { U4qk<!
impl[algorithm-1].sort(data); R_b4S%jhx
} yMt:L)+
q:=jv6T#
public static interface Sort { B$qTH5)W
public void sort(int[] data); 5?[hr5E.E
} >+DMTV[O
\BX9Wn*)a
public static void swap(int[] data, int i, int j) { _l2_) ~
int temp = data; %/ "yt}"|
data = data[j]; 2#ZqGf.'v
data[j] = temp; Bo\~PV[
} 8tVSai8[
} x~=Mn%Ew0