[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; 6rh5h:
} \"qY"V
int i1=l; Vl5`U'^qx
int i2=mid+1; b v G/|U
for(int cur=l;cur<=r;cur++){ T m,b,hi$
if(i1==mid+1) 2-&k^Gl!:
data[cur]=temp[i2++]; <x@}01~
else if(i2>r) YO#M/%^j
data[cur]=temp[i1++]; =w;F<M|Y
else if(temp[i1] data[cur]=temp[i1++]; pyH:#5
else O&vVv _zh
data[cur]=temp[i2++]; !_"@^?,q
} 9l|@v=gw.
} 6TYY UM"&
xRJ\E }/7
} M.Y~1c4f
S\LkL]qx
改进后的归并排序: ^.1)};i
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package org.rut.util.algorithm.support; !\"EFVH
0bz'&
import org.rut.util.algorithm.SortUtil; ?@BTGUK"C
wi;Br[d
/** }]e-{C}
* @author treeroot ]"J~:{, d
* @since 2006-2-2 rk&IlAE
* @version 1.0 MV<^!W
*/ wL;lQ&
public class ImprovedMergeSort implements SortUtil.Sort { "*($cQ$v
)n+Lo&C<
private static final int THRESHOLD = 10; E4xj?m^(y=
|P[w==AAf
/* ,eOB(?Ku
* (non-Javadoc) .)RzT9sg
* vo`2\R.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 05z,b]>l
*/ uPhK3nCGo
public void sort(int[] data) { t,,k
int[] temp=new int[data.length]; 6tXq:
mergeSort(data,temp,0,data.length-1); -!q:p&c
} x8wD0D
0Z~p%C<LW
private void mergeSort(int[] data, int[] temp, int l, int r) { .}^g!jm~h
int i, j, k; 'w!Cn>
int mid = (l + r) / 2; 8?J&`e/
if (l == r) >go,K{cK6
return; 7"aN#;&
if ((mid - l) >= THRESHOLD) 4\y/'`xm)6
mergeSort(data, temp, l, mid); 2w59^"<,
else mlixIW2
insertSort(data, l, mid - l + 1); ?a8^1:
if ((r - mid) > THRESHOLD) <d,b'<z s
mergeSort(data, temp, mid + 1, r); LwrUQ)
else cFaaLUZk
insertSort(data, mid + 1, r - mid); Jzj1w}?H
M1 :uJkO.
for (i = l; i <= mid; i++) { b8~Bazk
temp = data; C3*gn}[
} I2TaT(e\
for (j = 1; j <= r - mid; j++) { d_CKP"TA
temp[r - j + 1] = data[j + mid]; 0>C T=(A
} 0C1pt5K
int a = temp[l]; o4j[p3$
int b = temp[r]; cimp/n"
for (i = l, j = r, k = l; k <= r; k++) { %{ABaeb]
if (a < b) { d^RxQuA
data[k] = temp[i++]; IHe/xQ@
a = temp; $8;R[SU6Y
} else { `Zf^E >)
data[k] = temp[j--]; Kh,V.+7k
b = temp[j]; J]v%q,"
} IzsphBI
} }x@2]juJ
} txW{7[w+,
Q?e*4ba
/** (0j}-iaQEZ
* @param data s@9vY\5[9
* @param l }3o|EXx=
* @param i W"zab
*/ Id'X*U7Q
private void insertSort(int[] data, int start, int len) { PfreAEv,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5i>$]*o
} b@rVo;
} 9 TvV=
} -}=i 04^
} ,u!*2cWN
G;&-\0>W
堆排序： DBPRGQ
y<HO:kZ8`
package org.rut.util.algorithm.support; >_e]C}QUr
>*]Hq.&8
import org.rut.util.algorithm.SortUtil; WP?TX b`5
kgnmGuka
/** ?!9)q.bW
* @author treeroot yOphx07 (
* @since 2006-2-2 !u_Y7i3^
* @version 1.0 }lh I\q
*/ eCN })An
public class HeapSort implements SortUtil.Sort{ =+ytTQc*ot
f47Od-\-
/* (non-Javadoc) |K6REkzr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #.it]Nv{
*/ ABF"~=aL
public void sort(int[] data) { ko Z
MaxHeap h=new MaxHeap(); ,RJtm%w
h.init(data); /a^1_q-bX
for(int i=0;i h.remove(); gXYI\.
System.arraycopy(h.queue,1,data,0,data.length); T.@aep\"
} WX=Jl<
'$|[R98
private static class MaxHeap{ &{>cZh}\
'SCidN(n
void init(int[] data){ WOQP$D9
this.queue=new int[data.length+1]; Pf|siC^;s~
for(int i=0;i queue[++size]=data; QrfG^GID
fixUp(size); 'qjeXqGH$
} p89wNSMl[
} m1),;RsH
"]z-: \ V
private int size=0; O$IEn/%+
F{EnOr`,m=
private int[] queue; \]=7!RQ\
kB/D!1 "
public int get() { CZ(/=3,3n
return queue[1]; & @s!<9$W
} KHgBo}6
4G$|Rx[{,
public void remove() { ]3VI|f$$
SortUtil.swap(queue,1,size--); <1FC%f/
fixDown(1); G]fRk^~
} 29!q!g|
file://fixdown ?%`@ub$
private void fixDown(int k) { X=hYB}}nu
int j; BDq%'~/^
while ((j = k << 1) <= size) { Fb^:V4<T
if (j < size %26amp;%26amp; queue[j] j++; RnhL< Ywu
if (queue[k]>queue[j]) file://不用交换 ,_yhz0.
break; kD*2~Z?;
SortUtil.swap(queue,j,k); Ys@}3\Mc
k = j; Pm lx8@D
} nX(+s*Y+w
} %;e/7`>Ma
private void fixUp(int k) { Bm"KOr$}-
while (k > 1) { p /#$io
int j = k >> 1; Rniq(FAx
if (queue[j]>queue[k]) rypTKT|U;
break; {jYOsl
SortUtil.swap(queue,j,k); s0DGC
k = j; jJuW-(/4[
} $/.zm;D
} lD"(MQV@0
sYjpU
} O>^C4c!
P5 K' p5}#
} R,F[XI+=N
q>mE< (-M
SortUtil： 0BH_'ZW
t*>R`,j
package org.rut.util.algorithm; enp)-nS0
} w 5l
import org.rut.util.algorithm.support.BubbleSort; ?RK]FP"A
import org.rut.util.algorithm.support.HeapSort; HRiL.DS
import org.rut.util.algorithm.support.ImprovedMergeSort; H2um|6>
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Garnd b
import org.rut.util.algorithm.support.InsertSort; G`\f
import org.rut.util.algorithm.support.MergeSort; Xb{ [c+.
import org.rut.util.algorithm.support.QuickSort; ^j".
import org.rut.util.algorithm.support.SelectionSort; L5#P[cHzz
import org.rut.util.algorithm.support.ShellSort; E_8\f_%wK
]@uE#a:[
/** |g #K]v
* @author treeroot 7PANtCFb&
* @since 2006-2-2 4g :>[q
* @version 1.0 GlbySD@
*/ dHK`eS$sb
public class SortUtil { $: ]o]a
public final static int INSERT = 1; FI3)i>CnW
public final static int BUBBLE = 2; 4$*%gL;f^
public final static int SELECTION = 3; &4b&X0pU
public final static int SHELL = 4; /%&2HDA)
public final static int QUICK = 5; G8r``{C!
public final static int IMPROVED_QUICK = 6; $)RNKMZC}A
public final static int MERGE = 7; =,Dqqf
public final static int IMPROVED_MERGE = 8; WAn~+=Ax
public final static int HEAP = 9; B>GE9y5
q|Qk2M
public static void sort(int[] data) { du)~kU>l
sort(data, IMPROVED_QUICK); jBU4F~1y
} P@,nA41,j
private static String[] name={ KuMF^0V%c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |1b_3?e
}; &|!7Z4N
pek%08VSEU
private static Sort[] impl=new Sort[]{ wi4=OU1L)a
new InsertSort(), 1RK=,Wx
new BubbleSort(), ?r?jl;A&
new SelectionSort(), UN zlN
new ShellSort(), -5T=:2M
new QuickSort(), :_t}QP"
new ImprovedQuickSort(), *e-A6Sh
new MergeSort(), JaK}|
new ImprovedMergeSort(), m< 3Ao^I+
new HeapSort() -u?S=h}
}; !!Aj<*%
|7X:TfJ
public static String toString(int algorithm){ #Sa27$&.>
return name[algorithm-1]; OtGb<v<_H
} ^NX"sM0g
/Wy.>YC|
public static void sort(int[] data, int algorithm) { VY)9|JJCO
impl[algorithm-1].sort(data); ]R=,5kK3
} mExVYp h
5g9; +}X;
public static interface Sort { RLSc+kDH_
public void sort(int[] data); BRk0CLr5
} !OT-b>*w
lKlU-4
public static void swap(int[] data, int i, int j) { PSPmO'C+
int temp = data; wlEdt1G
data = data[j]; \[jq4`\$
data[j] = temp; D5:{fWVsV/
} TpHfS]W-P
} s%2v3eb