[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; eUUD|U*b
} `U?H^,FVA
int i1=l; PSrt/y!
int i2=mid+1; %V" +}Dr
for(int cur=l;cur<=r;cur++){ h-)A?%Xt
if(i1==mid+1) J 6d n~nPK
data[cur]=temp[i2++]; @a7(*<".
else if(i2>r) K:Xrfn{s
data[cur]=temp[i1++]; x4 A TK
else if(temp[i1] data[cur]=temp[i1++]; yz&q2
else IQ27FV|3
data[cur]=temp[i2++]; QP-<$P;~
} [laL6
} WRU@i;l
MjF.>4
} t&?v9n"X
C">=2OO
改进后的归并排序: =-B3vd:LF
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package org.rut.util.algorithm.support; )v$Cv|"
=Q8^@i4[&D
import org.rut.util.algorithm.SortUtil; 5/eS1NJ@
?p/kuv{\o#
/** }'M1(W
* @author treeroot Vp0GmZ
* @since 2006-2-2 S.)8&
* @version 1.0 -QNMB4
*/ :e9jK[)h0
public class ImprovedMergeSort implements SortUtil.Sort { 8T1DcA*
Y.hH fSp
private static final int THRESHOLD = 10; U"R.!=v
RAkFgC~
/* k:uuJ|
* (non-Javadoc) ?jM7C}
* jU9zCMyNF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q; /!oA_
*/ V{^fH6;[
public void sort(int[] data) { W3-Rs&se
int[] temp=new int[data.length]; Pc-8L]2oaF
mergeSort(data,temp,0,data.length-1); 7!840 :a?+
} `"-!UkD+
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private void mergeSort(int[] data, int[] temp, int l, int r) { $T%<'=u|E
int i, j, k; zSM7x
int mid = (l + r) / 2; m$UT4,Ol
if (l == r) Q Fqv,B\<
return; })u}PQ
if ((mid - l) >= THRESHOLD) es(LE/`e
mergeSort(data, temp, l, mid); n^(yW
else gm8Tm$fY
insertSort(data, l, mid - l + 1); $.]t1e7s
if ((r - mid) > THRESHOLD) _e@qv;*
mergeSort(data, temp, mid + 1, r); F'_8pD7
else <rI$"=7
insertSort(data, mid + 1, r - mid); %T*+t"\)
pvdZ>D-IU
for (i = l; i <= mid; i++) { HG6{`i
temp = data; *UxB`iA
} bOGDz|H``
for (j = 1; j <= r - mid; j++) { Ch!Q?4
temp[r - j + 1] = data[j + mid]; 9@EnmtR
} <T% hfW
int a = temp[l]; <`p'6n79
int b = temp[r]; =gv/9ce)3
for (i = l, j = r, k = l; k <= r; k++) { Tb6x@MorP
if (a < b) { "._WdY[
data[k] = temp[i++]; *b l{F\
a = temp; I; }%k;v6
} else { "RX5] eJc\
data[k] = temp[j--]; iOXP\:mPo
b = temp[j]; $u.T1v
} qJzK8eW
} v})Ti190
} a7d-
12DdUPOi
/** nMvIL2:3
* @param data B148wh#r
* @param l BW\5RIWwE5
* @param i .W.U:C1
*/ 67:<X(u+!
private void insertSort(int[] data, int start, int len) { 4<>:]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '>3RZ&O
} zLK ~i>aW
} ~\IDg/9Cj
} aC]l({-0
} ")gCA:1-
$^aXVy5p
堆排序： Q+M3Pqy
w%-!dbmb%
package org.rut.util.algorithm.support; fw};.M
Donf9]&U
import org.rut.util.algorithm.SortUtil; Ph_m'fbf
/;$ew~}
/** )Bvu[rUy
* @author treeroot >A "aOV>K
* @since 2006-2-2 &-Y:4.BXZ
* @version 1.0 07Cuoqt2
*/ zate%y
public class HeapSort implements SortUtil.Sort{ J+|V[E<x
-dN;\x
/* (non-Javadoc) ;mxT>|z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `IQC\DSl/
*/ :Lzj'Ij
public void sort(int[] data) { &.4a
MaxHeap h=new MaxHeap(); df rr.i
h.init(data); ({b/J0<@D
for(int i=0;i h.remove(); rz7b%WY
System.arraycopy(h.queue,1,data,0,data.length); 1T?%i
} Wfw9cxGkf
}X:r:{r
private static class MaxHeap{ /VZU3p<~
g<c^\WG
void init(int[] data){ 2g==98>cg
this.queue=new int[data.length+1]; 3yX^R^`
for(int i=0;i queue[++size]=data; <Y6>L};
fixUp(size); \Rt
} 41D[[Gh
} nu-wQr
#(4hX6?5AI
private int size=0; MT gEq
}`]^LFU5
private int[] queue; $&C%C\(>D
@V u[Tg}J
public int get() { JPzPL\
return queue[1]; .8~ x;P6
} o>%W7@Pr
sB!A:
public void remove() { htlWC>*
SortUtil.swap(queue,1,size--); ^O"`.2O1
fixDown(1); '|r!yAO6
} Z28@yD+
file://fixdown [0@i,7{ZqE
private void fixDown(int k) { KJSy7F
int j; qm_E/B
while ((j = k << 1) <= size) { .{>-.&
if (j < size %26amp;%26amp; queue[j] j++; <#`L&w.
if (queue[k]>queue[j]) file://不用交换 @gk[sQ\O
break; x7>sy,c
SortUtil.swap(queue,j,k); 5G[^ah<Tg
k = j; %"V,V3kw4
} (U<wKk"
} Z)0R$j`2
private void fixUp(int k) { -fn~y1
while (k > 1) { ]7@Dqd-/S
int j = k >> 1; )[.URp&
if (queue[j]>queue[k]) |zlwPi.
break; 7.-|3Wcg
SortUtil.swap(queue,j,k); 7n.J.<+9
k = j; r]{:{Z
} \t3i9#Q
} }wKU=Vm
5#tvc4+)
} EA72%Y9F
<jjaqDSmz
} :PJjy6,1
qr1^i1%\
SortUtil： 5@\<:Zmi
ZgtOy|?|
package org.rut.util.algorithm; H6QQ<~_&
b9Nw98`
import org.rut.util.algorithm.support.BubbleSort; c$TBHK;c
import org.rut.util.algorithm.support.HeapSort; |/Z4lcI
import org.rut.util.algorithm.support.ImprovedMergeSort; E.brQx#}
import org.rut.util.algorithm.support.ImprovedQuickSort; ygG9ht
import org.rut.util.algorithm.support.InsertSort; mqpZby
import org.rut.util.algorithm.support.MergeSort; 3@SfCG&|e
import org.rut.util.algorithm.support.QuickSort; Px`yD3
import org.rut.util.algorithm.support.SelectionSort; nLQJ~("
import org.rut.util.algorithm.support.ShellSort; ?/D#ql7
e%#f9i
/** y!].l0e2a
* @author treeroot 8vCHH&`
* @since 2006-2-2 D!CGbP(
* @version 1.0 Vj1AW<
*/ W\/0&H\i
public class SortUtil { AkF3F^
public final static int INSERT = 1; 7e4\BzCC
public final static int BUBBLE = 2; OpfFF;"A'
public final static int SELECTION = 3; YN^8s
public final static int SHELL = 4; j"]%6RwM]
public final static int QUICK = 5; V=U%P[S
public final static int IMPROVED_QUICK = 6; 49yN|h;c!
public final static int MERGE = 7; /TdTo@
public final static int IMPROVED_MERGE = 8; #frhO;6
public final static int HEAP = 9; Wp ]u0w
5 m:nh<)#
public static void sort(int[] data) { ?hO*~w;UU|
sort(data, IMPROVED_QUICK); +!rK4[W'
} Nz8iU@!a
private static String[] name={ [(1O_X(M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;:OJQFu%4
}; q\\J9`Q$J
mmi~A<
private static Sort[] impl=new Sort[]{ K)n(U9#
new InsertSort(), =e63>*M|
new BubbleSort(), &b%6pVj
new SelectionSort(), ,b/0_Q
new ShellSort(), >2ct1_
new QuickSort(), G:UdU{
new ImprovedQuickSort(), K%;O$ >
new MergeSort(), !zeBxR$&o
new ImprovedMergeSort(), ^^Y0 \3.
new HeapSort() H74hv`G9
}; 0x84 Ah)
8164SWB
public static String toString(int algorithm){ /YHeO
return name[algorithm-1]; j_Fr3BWS
} XHV+Y+VG
Z`[j;=[
public static void sort(int[] data, int algorithm) { 0xsvxH"*
impl[algorithm-1].sort(data); 3x#G SS
} >Kxl+F
9P]TIV.
public static interface Sort { .Xr_BJ _
public void sort(int[] data); {\k9%2V*+
} Mc.KLz&,FC
~"(1~7_
public static void swap(int[] data, int i, int j) { v / a/
int temp = data; D/U o?,>8
data = data[j]; {^~{X$YI
data[j] = temp; 3.>jagu
} .UJk0%1
} ;@sxE}`?g