[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; $'YKB8C
} ++DQS9b{
int i1=l; Qk.Q9@3W
int i2=mid+1; 86fK=G:>
for(int cur=l;cur<=r;cur++){ 8`2<g0V2
if(i1==mid+1) heZy 66
data[cur]=temp[i2++]; )kKmgtj
else if(i2>r) .*-w UBr
data[cur]=temp[i1++]; -{U>} Y)
else if(temp[i1] data[cur]=temp[i1++]; e ]o'i;I
else t-*|Hfp*^
data[cur]=temp[i2++]; 5b1uD>,;y
} E\~ KVn
} E? eWv)//
L3GC[$S
} hr4ye`c j
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改进后的归并排序: {XD/8m(hN|
6w"( y~c1
package org.rut.util.algorithm.support; DwmU fZp
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import org.rut.util.algorithm.SortUtil; ,ah*!Zm.kk
I+"?,Ej$K
/** qJ+52U|z
* @author treeroot "WbVCT'i
* @since 2006-2-2 Kka8cG
* @version 1.0 =v4r M0m,
*/ 6Z&u
public class ImprovedMergeSort implements SortUtil.Sort { %7v@n+Q
/MqXwUbO
private static final int THRESHOLD = 10; UM( l%
>*= =wlOB
/* G_M:0YI@
* (non-Javadoc) xshArJ&A
* !ASoXQRz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yn4)Zhkk
*/ w=D%D8 r2
public void sort(int[] data) { ~llMrl7
int[] temp=new int[data.length]; O}MZ-/z=o~
mergeSort(data,temp,0,data.length-1); w}j6.r
} NSS4vtA
z$c&=Q
private void mergeSort(int[] data, int[] temp, int l, int r) { 7a:*Y"f,~
int i, j, k; 9p2>`L
int mid = (l + r) / 2; Any Zi'
if (l == r) ',sQ/#S
return; F?b'L JS
if ((mid - l) >= THRESHOLD) uNe}"hs
mergeSort(data, temp, l, mid); 7|QGY7Tf
else =R&)hlm
insertSort(data, l, mid - l + 1); $ZI~8rI~
if ((r - mid) > THRESHOLD) 3}B5hht"D
mergeSort(data, temp, mid + 1, r); )W8L91-
else 'Aj(i/CM
insertSort(data, mid + 1, r - mid); l:Dn3Q
EO#gUv
for (i = l; i <= mid; i++) { Dac ^*k=D
temp = data; j:3EpD@GS
} [d4,gEx`Q\
for (j = 1; j <= r - mid; j++) { uxa=KM1H
temp[r - j + 1] = data[j + mid]; ':l"mkd+`
} (R_CUH
int a = temp[l]; -3.UE^W2
int b = temp[r]; g/IH|Z=A
for (i = l, j = r, k = l; k <= r; k++) { !2}rtDE
if (a < b) { ;>9OgO
data[k] = temp[i++]; <S]KaDu^
a = temp; },DyU
} else { 2)wAFO6u
data[k] = temp[j--]; j%pCuC&"
b = temp[j]; "r8EC
} dh&W;zs
} 7p)N_cJD
} j]pohxn$5
3->,So0Y
/** EdEoXY-2
* @param data PzjaCp'
* @param l {Q)dU-\
* @param i |*:tyP%m^
*/ )ZHc$+fU
private void insertSort(int[] data, int start, int len) { 5U%MoH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UqN{JG:#.
} %a5t15 9
} nO~b=qO
} >;)2NrJV
} Bc@30KiQ^
tpXa*6
堆排序： 7_DG 5nT
*=Doe2(!C
package org.rut.util.algorithm.support; [|4}~UV
UP\C"\
import org.rut.util.algorithm.SortUtil; 5MxH)~VQoM
j'+ELKQ
/** %JQ~!3
* @author treeroot ,eDD:#)$}
* @since 2006-2-2 !\^jt%e&
* @version 1.0 XYjcJ
*/ eJ)1K
public class HeapSort implements SortUtil.Sort{ Z==!C=SBv
M#xQW`-`
/* (non-Javadoc) L\YKdUL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8lwFAiC8
*/ 4qt+uNe!
public void sort(int[] data) { 4U?<vby
MaxHeap h=new MaxHeap(); # :#M{1I
h.init(data); 1 tPVP
for(int i=0;i h.remove(); bDDqaO ,8
System.arraycopy(h.queue,1,data,0,data.length); zG#wu
} j$Nf%V 6Y
r| f-_D
private static class MaxHeap{ o@9+mM"B)
:\b|dvI<
void init(int[] data){ .n`( X#,*l
this.queue=new int[data.length+1]; /Pvk),ca
for(int i=0;i queue[++size]=data; w9f _b3
fixUp(size); GRT]aw
} Z\Z,,g+WL
} gO='A(Y
r<c #nD~K
private int size=0; ZjD)?4
o@W_ai_
private int[] queue; R`#W wx>b
nA_%2F'W}
public int get() { ]78!!G[`
return queue[1]; KVR~jF%
} Z/<#n\>t0>
+j{Y,t{4
public void remove() { l{$[}<
SortUtil.swap(queue,1,size--); #y1Bx,
fixDown(1); "uKFOV?j&
} :et#0!
file://fixdown PcC/_+2
private void fixDown(int k) { $6h*lT<
int j; 6e&$l-
while ((j = k << 1) <= size) { *fnvZw?
if (j < size %26amp;%26amp; queue[j] j++; m%QSapV
if (queue[k]>queue[j]) file://不用交换 Gb2L }
break; 0[xpEiDx
SortUtil.swap(queue,j,k); =']3(6*
k = j; 8{0k0 &x
} 0[T,O,y
} _=EKXE)&}
private void fixUp(int k) { PFrfd_s{>\
while (k > 1) { c_.-b=zm
int j = k >> 1; R)5n 8
if (queue[j]>queue[k]) jlqv2V7=/
break; $q_R?Eay
SortUtil.swap(queue,j,k); 6N~q`;p0
k = j; +=BAslk
} 'cBBt
} DinPxtT?a
,"\@fwy{
} z6*<V5<7
2`?!+")
} //f
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SortUtil： YXW%]Uy+
"=1;0uy]
package org.rut.util.algorithm; pH@]Y+W
p{D4"Qn+P9
import org.rut.util.algorithm.support.BubbleSort; -0C@hM,wm
import org.rut.util.algorithm.support.HeapSort; HKDID[d0
import org.rut.util.algorithm.support.ImprovedMergeSort; 5jB*fIz
import org.rut.util.algorithm.support.ImprovedQuickSort; BlA[T%
import org.rut.util.algorithm.support.InsertSort; `aC){&AP(
import org.rut.util.algorithm.support.MergeSort; /Ncm^b4
import org.rut.util.algorithm.support.QuickSort; =u[k1s?
import org.rut.util.algorithm.support.SelectionSort; Pe;Y1Qq>>
import org.rut.util.algorithm.support.ShellSort; _hu")os
u #w29Pm
/** *Hz^K0:8(
* @author treeroot Ho;X4lo[j
* @since 2006-2-2 **3 z;58i
* @version 1.0 s$D ^>0
*/ |yEa5rd?W
public class SortUtil { ^(HUGl_
public final static int INSERT = 1; (xHf4[[u
public final static int BUBBLE = 2; "ZM4F?x
public final static int SELECTION = 3; !K f#@0E..
public final static int SHELL = 4; anMF-x4/*q
public final static int QUICK = 5; G 0%6ch^%
public final static int IMPROVED_QUICK = 6; VXLT^iX
public final static int MERGE = 7; aI^/X{d
public final static int IMPROVED_MERGE = 8; fC,:{}
public final static int HEAP = 9; CCBfKp
]vWKR."4
public static void sort(int[] data) { E;JsBH
sort(data, IMPROVED_QUICK); Sz- Jy:j
} tg]x0#@s
private static String[] name={ 8>,jpAN}r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;s`sn$@
}; S}p4iE"n
a,2'+Tlo
private static Sort[] impl=new Sort[]{ <:SZAAoIV
new InsertSort(), X/iT)R]b
new BubbleSort(), e/0<[s*#Q
new SelectionSort(), Zjbc3M5
new ShellSort(), TT=b79k
new QuickSort(), t2,A@2DU2
new ImprovedQuickSort(), 1 $/%m_t
new MergeSort(), 0"CG7Vg,zh
new ImprovedMergeSort(), L#E] BY
new HeapSort() H,Z;=N_
}; o.0ci+z@
yE}}c{hSn
public static String toString(int algorithm){ At-U2a#J{
return name[algorithm-1]; $5Xh,DOg
} gw,UQbnu
J]nohICe
public static void sort(int[] data, int algorithm) { h }B% /U
impl[algorithm-1].sort(data); :xtXQza"-
} 0NS<?p~_S
bbrXgQ`s+w
public static interface Sort { $GlWf
public void sort(int[] data); =EHUR'
} "?V0$-DR
0aG ni|
public static void swap(int[] data, int i, int j) { 28 ?\
int temp = data; j'A_'g'^
data = data[j]; ^s|6vd;PD=
data[j] = temp; V5UF3'3;}
} L*YynF
} nih0t^m'