[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; L*,h=#x(
} S1Od&v[R
int i1=l; /^k%sG@?
int i2=mid+1; A/UOcl+N
for(int cur=l;cur<=r;cur++){ V]+y*b.60
if(i1==mid+1) Y~{<Hs
data[cur]=temp[i2++]; %g@\SR.
else if(i2>r) +PADy8
data[cur]=temp[i1++]; %Y=r5'6l
else if(temp[i1] data[cur]=temp[i1++]; \~+b&
else 8OV=;aM?{
data[cur]=temp[i2++]; G6W|l2P!
} 0,0Z!-Y
} 'Q:%s
A[7H-1-
} -C~zvP;a
PlS)Zv3
改进后的归并排序: 2YY4 XHQS
qpCaW0]7
package org.rut.util.algorithm.support; EsX(<bx
32SkxcfrCK
import org.rut.util.algorithm.SortUtil; =p=/@FN
:A @f[Y'9
/** z\ONwMl
* @author treeroot |nnFjGC`~
* @since 2006-2-2 VV}"zc^
* @version 1.0 'Rsr*gX#
*/ _D?/$D7u#%
public class ImprovedMergeSort implements SortUtil.Sort { X`WS&!C<
Jj=N+,km
private static final int THRESHOLD = 10; U/s Z1u-
j$/#2%OVN
/* $t}W,?
* (non-Javadoc) b1i~F45h
* <8kCmuGlk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LAlX|b
*/ u pUJF`3
public void sort(int[] data) { 26k~Z}
int[] temp=new int[data.length]; O#18a,o@
mergeSort(data,temp,0,data.length-1); &g23tT#P?
} Fv %@k{
G/},lUzLg
private void mergeSort(int[] data, int[] temp, int l, int r) { O-W[^r2e
int i, j, k; 0)b1'xt',
int mid = (l + r) / 2; "9aFA(H6w
if (l == r) F*Hovxez
return; Vjt7X"_/
if ((mid - l) >= THRESHOLD) H!X*29nX
mergeSort(data, temp, l, mid); W5Pur lu?
else &-Wt!X 3
insertSort(data, l, mid - l + 1); 8N9,HNBT$
if ((r - mid) > THRESHOLD) mk!8>XvM
mergeSort(data, temp, mid + 1, r); 0n`Temb/
else sH2xkUp
insertSort(data, mid + 1, r - mid); Hf_ pe
sn^ 3xAF
for (i = l; i <= mid; i++) { .|07IH/Di{
temp = data; VWK/(>TP
} CL7/J[TS
for (j = 1; j <= r - mid; j++) { ;y@zvec4
temp[r - j + 1] = data[j + mid]; Cu24xP`
} : fYfXm
int a = temp[l]; }wvRs5;o
int b = temp[r]; Gsy>"T{CY
for (i = l, j = r, k = l; k <= r; k++) { |IzL4>m:;
if (a < b) { L/WRVc6
data[k] = temp[i++]; iM:-750n/
a = temp; z(^dwMw}
} else { .6 0yQ[aE
data[k] = temp[j--]; NopfL
b = temp[j]; 0Qvr g+
} $E^sA|KcT
} rDoMz3[w
} 1EQ:@1
Lk#)VGk:
/** PyHL`PZZ
* @param data V/"RCqY4
* @param l ;Wk3>\nT-
* @param i 6]<yR> '
*/ +`Nu0y!rj
private void insertSort(int[] data, int start, int len) { <[}zw!z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #<m2Xo?d]
} G"u4]!$/
} US9aW)8
} t!J>853
} I/A%3i=H
g5Io=e@s
堆排序： !- QB>`7$
U*sQ5uq
package org.rut.util.algorithm.support; S\t!7Xs%*U
ebCS4&c
import org.rut.util.algorithm.SortUtil; m zoH$@
=X[?d/[
/** !XI9evJw
* @author treeroot GtIAsC03
* @since 2006-2-2 )y:))\>
* @version 1.0 RN@)nc_
*/ bZfq?
public class HeapSort implements SortUtil.Sort{ M3]eqxLC
bVN?7D(
/* (non-Javadoc) _]Ob)RUVH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qyKR]%yzi
*/ =+DhLH}8
public void sort(int[] data) { P2s\f;Dwr
MaxHeap h=new MaxHeap(); eUCBQK
h.init(data); 7iM@BeIf
for(int i=0;i h.remove(); BLqK5~
System.arraycopy(h.queue,1,data,0,data.length); <^KW7M}w*c
} @RuMo"js
AOcUr)
private static class MaxHeap{ P()W\+",n
I D-I<Ev
void init(int[] data){ DQV9=
this.queue=new int[data.length+1]; &1yErGXC
for(int i=0;i queue[++size]=data; E U RKzJk
fixUp(size); -p7 HQ/
} 3&M0@/
} oPbziB8
|)%H_TXTy
private int size=0; 46\!W(O~y
'4~I%Z7L
private int[] queue; a"g\f{v0AR
zn^ G V
public int get() { Rh ]XJM
return queue[1]; Qu8=zI>t
} ZDI?"dt{
){,Mv:#+T
public void remove() { w}$;2g0=a<
SortUtil.swap(queue,1,size--); >zfx2wh\a
fixDown(1); ;KmrBNF
} (0_zp`)
file://fixdown IIBS:&;+-
private void fixDown(int k) { x*TJYST
int j; k_?OEkgUh
while ((j = k << 1) <= size) { |lzcyz
if (j < size %26amp;%26amp; queue[j] j++; a[}?!G-Wt|
if (queue[k]>queue[j]) file://不用交换 4JO16
break; eBmHb\
SortUtil.swap(queue,j,k); RK$(
k = j; pTTM(Hrx
} c3PA<q[
} <)sL8G9Y
private void fixUp(int k) { LZs'hA<L
while (k > 1) { oGg<s3;UND
int j = k >> 1; ]EDCs?,
if (queue[j]>queue[k]) L 9cXgd
break; mC0Dj O
SortUtil.swap(queue,j,k); i=P}i8,^=
k = j; THK^u+~LM
} u:l<NWF^
} RwrRN+&s\
z?|bs?HKS
} _;S~nn
?pd/cj^
} #RSUChe7w
DZH2U+K
SortUtil： Hm|N{
{KEmGHC4R
package org.rut.util.algorithm; {'{9B
ICe;p V
import org.rut.util.algorithm.support.BubbleSort; \GioSg
import org.rut.util.algorithm.support.HeapSort; psz0q|
import org.rut.util.algorithm.support.ImprovedMergeSort; }mUb1b
import org.rut.util.algorithm.support.ImprovedQuickSort; h>!9N dzG
import org.rut.util.algorithm.support.InsertSort; UYW'pV
import org.rut.util.algorithm.support.MergeSort; `Nz`5}8.?
import org.rut.util.algorithm.support.QuickSort; .XkVdaX
import org.rut.util.algorithm.support.SelectionSort; 4mX?PKvbn
import org.rut.util.algorithm.support.ShellSort; I};*O6D`
QJjk#*?,|
/** TK~KM
* @author treeroot @" umY-1f
* @since 2006-2-2 ,69547#o
* @version 1.0 Q+QD,
*/ -m ;n}ECg
public class SortUtil { 08%Bx~88_%
public final static int INSERT = 1; K,U8vc
public final static int BUBBLE = 2; 37jrWe6xwp
public final static int SELECTION = 3; })J}7@VPO
public final static int SHELL = 4; #Oq.}x?i
public final static int QUICK = 5; JZ:yPvJ
public final static int IMPROVED_QUICK = 6; GWWaH+F[h
public final static int MERGE = 7; H(M{hfa|
public final static int IMPROVED_MERGE = 8; *_}0vd
public final static int HEAP = 9; d 792#Dc
88?O4)c
public static void sort(int[] data) { %@TC- xx
sort(data, IMPROVED_QUICK); ]0|A\bE\S
} %p&y/^=0I
private static String[] name={ \.Op6ECV9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N&Ho$,2s
}; ?gjx7TQ?
tp&|*M3
private static Sort[] impl=new Sort[]{ 9zIqSjos"
new InsertSort(), YB2gxZ
new BubbleSort(), O(D2F$VlL
new SelectionSort(), E7aG&K
new ShellSort(), \[*q~95$v
new QuickSort(), /5j5\F:33
new ImprovedQuickSort(), _z 5W*..
new MergeSort(), ?~yJ7~3TS<
new ImprovedMergeSort(), 1Ax;|.KQH
new HeapSort() #V#!@@c;?
}; DGS,iRLnA
.sFN[>)
public static String toString(int algorithm){ LGX+_"
return name[algorithm-1]; K(d+t\ca
} *vvm8ik
F*>#Xr~/
public static void sort(int[] data, int algorithm) { =_ b/g
impl[algorithm-1].sort(data); {s*2d P)
} #Q*V9kvU/H
b`^Q ':^A
public static interface Sort { Y~UAE.
public void sort(int[] data); ;YW@ 3F-h
} HiH<'m"\.
NuD|%Ebs
public static void swap(int[] data, int i, int j) { EUQtl_h/H
int temp = data; [K'gvLt1
data = data[j]; k6RVP:V
data[j] = temp; P+OS
} G43r85LO
} {P_7AM