[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; x*j eCD,
} //3fgoly
int i1=l; `"V}Wq ?I
int i2=mid+1; -jNnx*
for(int cur=l;cur<=r;cur++){ rw 2i_,.*~
if(i1==mid+1) B}zBbB
data[cur]=temp[i2++]; :rk6Stn$z
else if(i2>r) Ii3F|Vb G
data[cur]=temp[i1++]; 1#|lt\T
else if(temp[i1] data[cur]=temp[i1++]; L;Ynq<x
else @}r s6 G
data[cur]=temp[i2++]; Nw,|4S
} wqjR-$c
} qs8^qn0A
^\S~rW.3_
} ~4#D G^5
M`iE'x
改进后的归并排序: Q`O~f<a
bO('y@)X
package org.rut.util.algorithm.support; TQ~a5q
b"Nd8f[
import org.rut.util.algorithm.SortUtil; Rw63{b/
zDm3$P=
/** E&"V~
* @author treeroot mU[
* @since 2006-2-2 [Ak0kH>
* @version 1.0 &\ad.O/Q
*/ U.Z5;E0:
public class ImprovedMergeSort implements SortUtil.Sort { 0Bkc93
;B }4pv}
private static final int THRESHOLD = 10; lN"@5(5%
?{L'd
/* hq&9S{Ep
* (non-Javadoc) ww+,GnV
* A&ceuu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rb^G~82d?
*/ sw:a(o&$
public void sort(int[] data) { m.gv?
int[] temp=new int[data.length]; 6B b+f"
mergeSort(data,temp,0,data.length-1); roi,?B_8
} 7 > _vH]
}QCn>LXE
private void mergeSort(int[] data, int[] temp, int l, int r) { Jh4pY#aF
int i, j, k; Gy6x.GX
int mid = (l + r) / 2; O"X7 DgbC
if (l == r) GUJ?6;
return; WFmW[< g
if ((mid - l) >= THRESHOLD) !4z vkJO
mergeSort(data, temp, l, mid); 4kK_S.&
else zTq"kxn'
insertSort(data, l, mid - l + 1); %5n'+-XVj
if ((r - mid) > THRESHOLD) %Yg|QBm|
mergeSort(data, temp, mid + 1, r); _Wp.s]D [
else " w /Odd
insertSort(data, mid + 1, r - mid); E2=vLI]
tp"eXA0n
for (i = l; i <= mid; i++) { ! P$[$W
temp = data; #*S.26P^4
} (BK_A{5
for (j = 1; j <= r - mid; j++) { ?5%o-hB|
temp[r - j + 1] = data[j + mid]; n-GoG(s..b
} Aeq^s
int a = temp[l]; (b1e!gJpy
int b = temp[r]; n0V^/j}
for (i = l, j = r, k = l; k <= r; k++) { @L 6)RF
if (a < b) { tHM0]Gb}
data[k] = temp[i++]; OeZ"WO
a = temp; HqyAo]{GN
} else { JZ> (h
data[k] = temp[j--]; w)R5@ @C*
b = temp[j]; s._,IW;
} g">^#^hBE
} {=,I>w]T|W
} S`TQWWQo;
.jbxA2
/** CFoR!r:X
* @param data r&F 6ZCw
* @param l 4`o<e)c3
* @param i n7/&NiHxv/
*/ nYBa+>3BDf
private void insertSort(int[] data, int start, int len) { ^nFP#J)_5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?1LRR ;-x
} ^q|W@uG-(
} }Q6o#oZ
} v@J[qpX
} ?jvuTS2
ZhC,nbM
堆排序： oDt{;S8|]
rz%^l1@-
package org.rut.util.algorithm.support; E>r7A5Uo
*l%&/\
import org.rut.util.algorithm.SortUtil; &xt GabNk
Z@>kqJ%
/** s+=':Gcb(C
* @author treeroot p3T:Y_
* @since 2006-2-2 rJRg4Rog
* @version 1.0 x2OAkkH\]i
*/ /?S^#q>m%
public class HeapSort implements SortUtil.Sort{ xm=$D6O:
& Yx12B\
/* (non-Javadoc) `UqX`MFz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rP!GS _RG
*/ 5IF$M2j
public void sort(int[] data) { L gy^^.
MaxHeap h=new MaxHeap(); {r5OtYmpR
h.init(data); )dJx82" l
for(int i=0;i h.remove(); cVr+Wp7K#|
System.arraycopy(h.queue,1,data,0,data.length); G9GLRdP
} YJ~mcaw
O*W<za;
private static class MaxHeap{ sN#ju5
$>+g)
void init(int[] data){ >Ml5QO$*.q
this.queue=new int[data.length+1]; {:Kr't<XzF
for(int i=0;i queue[++size]=data; ?|\wJrM ]
fixUp(size); B`jq"[w]-
} 1i)3!fH0:
} Jz P0D'
h[<l2fy
private int size=0; aEVy20wd
{.y_{yWo
private int[] queue; C46jVl
#~.RJ%
public int get() { Io&HzQW^a
return queue[1]; deTD|R
} dT (i*E\j
^r mQMjF
public void remove() { <~:2~r
SortUtil.swap(queue,1,size--); T4[/_;1g
fixDown(1); 1083p9Uh
} ovDPnf(
file://fixdown sc6NON#
private void fixDown(int k) { j9vK~_?;
int j; [8 H:5Ho
while ((j = k << 1) <= size) { ZNL+w4
if (j < size %26amp;%26amp; queue[j] j++; g=,}j]tl
if (queue[k]>queue[j]) file://不用交换 qOnGP{
break; TNK1E
SortUtil.swap(queue,j,k); 3=*ur( Qy
k = j; N0JdU4'
} `46.!
} ,(f W0d#
private void fixUp(int k) { -8<vWe
while (k > 1) { @~UQU)-(
int j = k >> 1; ;P/ 4.|<
if (queue[j]>queue[k]) GS}JyU
break; 9jM7z/Ff
SortUtil.swap(queue,j,k); DVJn;X^T:
k = j; {];-b0MS~
} n+i=Ff
} KDH<T4#x
:F@goiuC
} ErQ6a%~,
UP%6s:>:
} "^;h'
7T t!hf
SortUtil： ]]3rSXs2}J
j]vEo~Bbh
package org.rut.util.algorithm; Nd{U|k3pL
j2.7b1s
import org.rut.util.algorithm.support.BubbleSort; S kB*w'k
import org.rut.util.algorithm.support.HeapSort; yf4L0.
import org.rut.util.algorithm.support.ImprovedMergeSort; TY'61xWi
import org.rut.util.algorithm.support.ImprovedQuickSort; @2*Q*
import org.rut.util.algorithm.support.InsertSort; =)gdxywoC
import org.rut.util.algorithm.support.MergeSort; WIpV'F|t]`
import org.rut.util.algorithm.support.QuickSort; fGRV]6?V
import org.rut.util.algorithm.support.SelectionSort; 6<R[hIWpZ}
import org.rut.util.algorithm.support.ShellSort; 5NH4C
4-Jwy
/** K>b4(^lf
* @author treeroot U~;tk@
* @since 2006-2-2 kRBO]
* @version 1.0 =;b3i1'U
*/ qd#7A ksm
public class SortUtil { 3JkdPh
public final static int INSERT = 1; a/1;|1a.
public final static int BUBBLE = 2; 5Dz$_2oM3
public final static int SELECTION = 3; 9cU9'r# h
public final static int SHELL = 4; x{tlC}t
public final static int QUICK = 5; dM P'Vnfj
public final static int IMPROVED_QUICK = 6; `Pc<0*`a
public final static int MERGE = 7; !6@'H4cb=
public final static int IMPROVED_MERGE = 8; -5ZmIlL.S
public final static int HEAP = 9; BMuEfa^
Jmi,;Af'/
public static void sort(int[] data) { c %Cbq0+2
sort(data, IMPROVED_QUICK); qMA-#
} *f`P7q*
private static String[] name={ \g h |G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _L$a[zH
}; 2CneRKQy
0Oc?:R'$
private static Sort[] impl=new Sort[]{ $(]nl%<Q
new InsertSort(), X{OWDy
new BubbleSort(), !2Z"Lm
new SelectionSort(), ' VKD$q
new ShellSort(), :."oWqb)
new QuickSort(), n+te5_F
new ImprovedQuickSort(), jlFlhj:/I
new MergeSort(), wJCw6&D,/
new ImprovedMergeSort(), 6N5(DD
new HeapSort() Ke?,AWfG
}; j%^4 1y
w D r/T3
public static String toString(int algorithm){ "42/P4:
return name[algorithm-1]; |%mZ|,[
} FO:L+&hr?>
^\?Rh(pu
public static void sort(int[] data, int algorithm) { s&-MJ05y
impl[algorithm-1].sort(data); aekke//y
} *kg->J
?+^p$'5
public static interface Sort { a.}#nSYP
public void sort(int[] data); {\P%J:s#9
} r~ 2*'zB
x3+{Y
public static void swap(int[] data, int i, int j) { EG\;l9T
int temp = data; 6w,"i#E!
data = data[j]; WKlyOK=}
data[j] = temp; kP ,8[r
} jy?*`q1]
} 'wG1un;t