[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; ffMh2
} ZH'- >/
int i1=l; <T]BSQk
int i2=mid+1; c@H_f
for(int cur=l;cur<=r;cur++){ wz1fx>Q
if(i1==mid+1) /^_~NF#
data[cur]=temp[i2++]; &5JTcMC^
else if(i2>r) +ob<? T
data[cur]=temp[i1++]; 9 0PF)U
else if(temp[i1] data[cur]=temp[i1++]; tQ!p<Q= $)
else ee7#PE]}
data[cur]=temp[i2++]; |'@c ~yc
} `PML4P[
} }dnO7K
cuv?[M
} kU uDA><1
+/!kL0[v
改进后的归并排序: Ik{[BRzUgt
@tv3\eD
package org.rut.util.algorithm.support; \HR<^xY
b4TZnO
import org.rut.util.algorithm.SortUtil; ODS8bD0!i
X|o;*J](
/** b| e7mis@
* @author treeroot yGGQ;!/
* @since 2006-2-2 $|J16tW
* @version 1.0 tJ:]ne
*/ ey'x3s_
public class ImprovedMergeSort implements SortUtil.Sort { uZ[7[mK}n7
P .I<.e
private static final int THRESHOLD = 10; :|j,x7&/{
T-"zK r!
/* gz{~\0y
* (non-Javadoc) ~W?F.
* y"N7r1Pf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >%qk2h>
*/ -P I$SA,
public void sort(int[] data) { DeqTr:
int[] temp=new int[data.length]; kR+xInDM*
mergeSort(data,temp,0,data.length-1); CKC%|xke
} y2"PKBK\_
05$;7xnf(
private void mergeSort(int[] data, int[] temp, int l, int r) { ^]nnvvp
int i, j, k; sZ~q|}D-
int mid = (l + r) / 2; LW+a-i
if (l == r) um/2.Sn>
return; $U3|.4
if ((mid - l) >= THRESHOLD) E0F8FR'
mergeSort(data, temp, l, mid); P''5A6#5
else 2oY.MQD7iW
insertSort(data, l, mid - l + 1); 4J#F;#iA
if ((r - mid) > THRESHOLD) +y%"[6c|
mergeSort(data, temp, mid + 1, r); lrn3yDkR?
else CcF$?07 i
insertSort(data, mid + 1, r - mid); c!,&]*h"k
R^_7B(
for (i = l; i <= mid; i++) { q> ;u'3}
temp = data; PvmmyF
} }b$?t7Q)
for (j = 1; j <= r - mid; j++) { G8]DK3#
temp[r - j + 1] = data[j + mid]; j$2rU'
} cJ CKxj
int a = temp[l]; +ZuT\P&kR5
int b = temp[r]; OR{<)L
for (i = l, j = r, k = l; k <= r; k++) { qG=?+em
if (a < b) { 977%9z<h
data[k] = temp[i++]; +Ce[OG.
a = temp; M84{u!>[
} else { 1|]IWX|
data[k] = temp[j--]; Vjv~RNGF
b = temp[j]; 1_AB;^
} nC-=CMWWr
} k,)xv?
} zWN/>~}U\
$P=B66t ^
/** + F{hFuHV
* @param data D'{NEk@
* @param l 18(hrj
* @param i 2(SU# /,
*/ <>gX'te
private void insertSort(int[] data, int start, int len) { TH;kJ{[}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ny(`An
} ;$`5L"I5$
} Qqp_(5S|>
} 4*j6~
} |@84l
dA)JR"r2
堆排序： o'oA.'ul
(8Q0?SZN
package org.rut.util.algorithm.support; tl:V8sYTP
+"sjkdum1
import org.rut.util.algorithm.SortUtil; 4trP*u,4
Ry$zF~[
/** W0zRV9"P
* @author treeroot ]xx}\k
* @since 2006-2-2 F&tU^(7<
* @version 1.0 i~};5j(
*/ ]lX`[HX7
public class HeapSort implements SortUtil.Sort{ xz$-_NWW
C:*=tD1
/* (non-Javadoc) %anY'GK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fU6O:-
*/ {Xw6]d
public void sort(int[] data) { 3MmpB9l#H
MaxHeap h=new MaxHeap(); (D\7EH\9,]
h.init(data); n@TK}?\UoR
for(int i=0;i h.remove(); Su4&qY
System.arraycopy(h.queue,1,data,0,data.length); )bd)noZi
} QR ?JN\%?
nrhzNW>]
private static class MaxHeap{ :4Gc'bR
qjcPJ
void init(int[] data){ @r.w+E=
this.queue=new int[data.length+1]; n7|8`?R^
for(int i=0;i queue[++size]=data; p)u?x)w=
fixUp(size); [~aRA'qJ{V
} Q)/V>QW
} H^VNw1.
S7B7'[ru
private int size=0; >/]` f8^
/?ZO-]q
private int[] queue; B4D#TlB
Oc6_x46S4
public int get() { ifXGH>C
return queue[1]; EZ"n3#/
} @5["L
8Q{"W"]O7
public void remove() { NsPAWI|4
SortUtil.swap(queue,1,size--); %Tv2op
fixDown(1); *]7$/%.D
} -ho%9LW%|
file://fixdown 8[k:FGp>
private void fixDown(int k) { 5 O't-'
int j; <UEta>jj
while ((j = k << 1) <= size) { Daw;6f:
if (j < size %26amp;%26amp; queue[j] j++; @QN(ouqQ
if (queue[k]>queue[j]) file://不用交换 A_y]6~Mu?~
break; Nv~H797B
SortUtil.swap(queue,j,k); $_ BoG
k = j; ~6Xr^An/Z
} d3[O!4<T
} >=6 j:
private void fixUp(int k) { h7P<3m}
while (k > 1) { n@JZ2K4
int j = k >> 1; '^{:HR#i
if (queue[j]>queue[k]) nF)b4`Nd
break; f@j)t%mh
SortUtil.swap(queue,j,k); _.{I1*6Y2
k = j; >1$vG
} @W1F4HYds
} 2Y7u M;8
n9%&HDl4
} b2tUJ2p
ppP0W`p
} R<L<kChg
RPB%6z$
SortUtil： t:O"t G
KLBX2H2^0
package org.rut.util.algorithm; ( kKQs")
^.pd'
import org.rut.util.algorithm.support.BubbleSort; Wik8V0(
import org.rut.util.algorithm.support.HeapSort; W>o>Y$H
import org.rut.util.algorithm.support.ImprovedMergeSort; W{is2s
import org.rut.util.algorithm.support.ImprovedQuickSort; O a%ZlEUF
import org.rut.util.algorithm.support.InsertSort; 8Y,imj\(v
import org.rut.util.algorithm.support.MergeSort; xU!eT'Y
import org.rut.util.algorithm.support.QuickSort; 0! W$Cz[
import org.rut.util.algorithm.support.SelectionSort; /Xm4%~b_gj
import org.rut.util.algorithm.support.ShellSort; ;ztt*py
(M-Wea!q
/** ln2lFfz
* @author treeroot %K[u
* @since 2006-2-2 qRcY(mb
* @version 1.0 Q H57[Yg
*/ >Y6iLQ$X
public class SortUtil { 7C>5XyyJ
public final static int INSERT = 1; L)z`
public final static int BUBBLE = 2; 1EemVZdY
public final static int SELECTION = 3; +B&,$ceyaJ
public final static int SHELL = 4; '* eeup
public final static int QUICK = 5; P?o|N<46
public final static int IMPROVED_QUICK = 6; | zyO;
public final static int MERGE = 7; 0,]m.)ws
public final static int IMPROVED_MERGE = 8; f.G"[p
public final static int HEAP = 9; Js'j}w
tJvs ?eZ)
public static void sort(int[] data) { #/0d
sort(data, IMPROVED_QUICK); O>3f*Cc
} pGdFeEkB/
private static String[] name={ "qdEu KI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %F}i2!\<L
}; I/hq8v~S
!zQbF&>
private static Sort[] impl=new Sort[]{ hd1aNaF-
new InsertSort(), l2ARM3"
new BubbleSort(), +pY--5t
new SelectionSort(), tyU'[LF?
new ShellSort(), ?p'DgL{
new QuickSort(), c0v6*O)
new ImprovedQuickSort(), mXOY,g2w
new MergeSort(), U}R(
new ImprovedMergeSort(), K"/3/`T
new HeapSort() +GvPJI
}; x(+H1D\W
bV&"jjEx
public static String toString(int algorithm){ >e^^YR^
return name[algorithm-1]; 'w8p[h (,
} VCX^D)[-
Y[rRz6.*(
public static void sort(int[] data, int algorithm) { f;=<$Y>i
impl[algorithm-1].sort(data); ,92wW&2
} ]ne
isU4D
public static interface Sort { Q*ixg$>
public void sort(int[] data); \P;2s<6i\
} jdX*
)wNcz~ Y
public static void swap(int[] data, int i, int j) { [?55vYt
int temp = data; )m$MC25
data = data[j]; &&ZX<wOM
data[j] = temp; dCA! R"HD
} X#k:J
} g`(3r