[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; J|z>5Z
} },G>+ s8h
int i1=l; qd7 86~
int i2=mid+1; $Jt+>.44
for(int cur=l;cur<=r;cur++){ j5yxdjx9
if(i1==mid+1) 9(PQ7}
data[cur]=temp[i2++]; #6%9*Rh
else if(i2>r) ^l(Kj3gM
data[cur]=temp[i1++]; `T]1u4^E
else if(temp[i1] data[cur]=temp[i1++]; rz@;Zn
else dfmxz7V
data[cur]=temp[i2++]; -8]M ,,?
} `f9I#B
} UF)4K3X
#l!Sz247
} KF#,Q
3'H 1T
改进后的归并排序: y~cDWD<h
*Q@%<R
package org.rut.util.algorithm.support; ^mu?V-4
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import org.rut.util.algorithm.SortUtil; _k,/t10
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/** ,`3kDqS_4
* @author treeroot ;be2sTo
* @since 2006-2-2 <opBOZ d
* @version 1.0 `6.rTs$<
*/ Wy2 pa #Q
public class ImprovedMergeSort implements SortUtil.Sort { S]7RGzFe
x[,HK{U|t
private static final int THRESHOLD = 10; ];.H]TIc6
Xy>+r[$D:
/* '7!b#if
* (non-Javadoc) D-[`wCa,
* O<1qU M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V_&>0P{q
*/ @GB~rfB[
public void sort(int[] data) { XCGJ~
int[] temp=new int[data.length]; [a&|c%h
mergeSort(data,temp,0,data.length-1); jo.Sg:7&
} !XvQm*1
.5',w"R
private void mergeSort(int[] data, int[] temp, int l, int r) { GJLlMi
int i, j, k; _IA@X. )?
int mid = (l + r) / 2; XL/?v" /
if (l == r) `(r[BV|h}
return; gsqpQq7
if ((mid - l) >= THRESHOLD) yJ(p-3O5
mergeSort(data, temp, l, mid); MmjeFv
else RE72%w(oM
insertSort(data, l, mid - l + 1); 26c,hPIeXY
if ((r - mid) > THRESHOLD) V0,%g+.^
mergeSort(data, temp, mid + 1, r); , 8NY<sFh
else Q.q'pJ-
insertSort(data, mid + 1, r - mid); ccUq!1
q&h&GZ
for (i = l; i <= mid; i++) { oCBZ9PGkK
temp = data; }=':)?'-.
} ,<[Q/:}[
for (j = 1; j <= r - mid; j++) { !18M!8Xea
temp[r - j + 1] = data[j + mid]; Sc!{ o!9\
} qjsS2,wM
int a = temp[l]; [dK5kO
int b = temp[r]; GgoPwl#{
for (i = l, j = r, k = l; k <= r; k++) { a)+;<GZ~
if (a < b) { H0zKL]D'>
data[k] = temp[i++]; Fu*~{n
a = temp; ?F@0"qi
} else { hcvWf\4'#q
data[k] = temp[j--]; >i>%@
b = temp[j]; rpk )i:k\
} U{2[nF
} ~>af"<
} _]~gp.
NArql
/** %"2;i@
* @param data i)Hjmf3
* @param l $nB4Ie!WcR
* @param i y{.s 4NT
*/ B?qLXRv
private void insertSort(int[] data, int start, int len) { $YM>HZe-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GZ.Fq
} U*.Wx0QM
} c:SA#.
} 6R%Ra
} RJ ,a}w[9
jt?937{
堆排序： pXfg{2
2qY`*Y.2
package org.rut.util.algorithm.support; ,\y)k}0lH
x \.qzi
import org.rut.util.algorithm.SortUtil; ]-Z="YPY
_;] 3w
/** X~DI d
* @author treeroot "v @h
* @since 2006-2-2 oT5N_\
* @version 1.0 cxBu2(Y
*/ Hshm;\'
public class HeapSort implements SortUtil.Sort{ YQyf:xJ
_S43_hW
/* (non-Javadoc) _b+=q:$/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jY>BU&
*/ GXV<fc"1
public void sort(int[] data) { WD=#. $z$
MaxHeap h=new MaxHeap(); aKkG[qN
h.init(data); >4gGb)
for(int i=0;i h.remove(); Cv@ZzILyoK
System.arraycopy(h.queue,1,data,0,data.length); .w/_Om4T*b
} K:!|xr(1d
50:gk*hy
private static class MaxHeap{ DYJ F6O
-r%3"C=m
void init(int[] data){ +I$ k_
this.queue=new int[data.length+1]; E2M|b
for(int i=0;i queue[++size]=data; @Sxb}XI!f
fixUp(size); i%m]<yElm
} kW"6Gc&HUN
} ;++CMTza]
5&WYL
private int size=0; Ccmo(W+0
(^fiw%#
private int[] queue; %#!`>S)O
6Z:<?_p%7g
public int get() { y\]~S2}G
return queue[1]; "0JG96&\
} wAC*D=Qj
bLrC_
public void remove() { 2f'3Vjp~G
SortUtil.swap(queue,1,size--); | |=q"h3(
fixDown(1); &tT*GjPwg;
} ?lg
file://fixdown w)A@
private void fixDown(int k) { fiuF!<#;6
int j; $q_e~+SXT
while ((j = k << 1) <= size) { /%w9F
if (j < size %26amp;%26amp; queue[j] j++; &F4khga`^:
if (queue[k]>queue[j]) file://不用交换 V) #vvnq
break; bL: !3|M
SortUtil.swap(queue,j,k); g4(vgWOW`
k = j; pIKQx5;
} "pdq_35
} W,<P])
private void fixUp(int k) { Q;]g9T[)
while (k > 1) { S2/6VoGE
int j = k >> 1; 8]!%mrS
if (queue[j]>queue[k]) r|U'2+vn
break; 8`e75%f:2
SortUtil.swap(queue,j,k); =+K2`=y;WF
k = j; zmV5k
} %E\&9,
} L0\97AF
0G-M.s}A
} Jx#r
OF^:_%c/
} g`6_Ao8
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SortUtil： qJY'"_Q{
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package org.rut.util.algorithm; q8U*
RP}.Ei
import org.rut.util.algorithm.support.BubbleSort; ?]i.Zi\[f
import org.rut.util.algorithm.support.HeapSort; so~vnSQ!x
import org.rut.util.algorithm.support.ImprovedMergeSort; 4CR.=
import org.rut.util.algorithm.support.ImprovedQuickSort; 86[/NTD<-
import org.rut.util.algorithm.support.InsertSort; ,2H@xji [
import org.rut.util.algorithm.support.MergeSort; :JBvCyj4PE
import org.rut.util.algorithm.support.QuickSort; Qqt<
import org.rut.util.algorithm.support.SelectionSort; %nU8 Ca
import org.rut.util.algorithm.support.ShellSort; 9.F+)y@
F$l]#G.@A
/** *h=|KOS
* @author treeroot >Qk4AMIO
* @since 2006-2-2 K8,fw-S%
* @version 1.0 eK%~`Y
*/ 9cJzL"yi
public class SortUtil { ]s3U+t?
public final static int INSERT = 1; i #5rk(^t
public final static int BUBBLE = 2; h{s- e.
public final static int SELECTION = 3; y/!h.[
public final static int SHELL = 4; $tGk,.#j
public final static int QUICK = 5; C]22 [v4
public final static int IMPROVED_QUICK = 6; x.Sq2rw]V
public final static int MERGE = 7; SDY!!.
public final static int IMPROVED_MERGE = 8; R)s@2S
public final static int HEAP = 9; JgI+k Nx
P'^#I[G'
public static void sort(int[] data) { `^t0379e
sort(data, IMPROVED_QUICK); 3*13XQ
} v!oXcHK/
private static String[] name={ D8u_Z<6IjI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V~rF`1+5N
}; giU6f!%
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private static Sort[] impl=new Sort[]{ l56D?E8
new InsertSort(), gAcXd<a0
new BubbleSort(), X@$x(Zc
new SelectionSort(), %]/O0#E3Kz
new ShellSort(), q$[x*!~
new QuickSort(), Rk#@{_
new ImprovedQuickSort(), F1skI _!
new MergeSort(), &5Ai&<q"p
new ImprovedMergeSort(), /IDfGAE
new HeapSort() K1S)S8.EZ8
}; Z4U8~i
>L6V!
public static String toString(int algorithm){ #q`-"2"|
return name[algorithm-1]; 1:I47/
} Z-(Vfp4
MjIp~?*
public static void sort(int[] data, int algorithm) { tOn_S@/r
impl[algorithm-1].sort(data); n !ty\E
} L_Q1:nL-0
X|Gsf= 1S
public static interface Sort { e<_p\LiOS
public void sort(int[] data); ocwh*t)<k
} wIi_d6?
2=pVX
public static void swap(int[] data, int i, int j) { )*[3Imq/
int temp = data; cC'{+j8-a
data = data[j]; ?zwPF;L*
data[j] = temp; R8 1z|+c|_
} |2,'QTm=
} 0)}bJ,5/