[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; '<R>E:5
} {} Bf
int i1=l; uHIiH@S
int i2=mid+1; KIeT!kmDl
for(int cur=l;cur<=r;cur++){ 5*\\J&H
if(i1==mid+1) kSc{^-<R
data[cur]=temp[i2++]; ^ZM0c>ev=l
else if(i2>r) 2S8P}$mM
data[cur]=temp[i1++]; O,<IGO
else if(temp[i1] data[cur]=temp[i1++]; O'GG Ti]e
else vfB2XVc
data[cur]=temp[i2++]; KvQ,;A
} CAT.4GM
} azP+GM=i7
>23-
} efG6v
"C?5f]T
改进后的归并排序: AkU<g
?%O3Oi Xz
package org.rut.util.algorithm.support; j$da8] !
QR">.k4QJ
import org.rut.util.algorithm.SortUtil; y{9~&r
[0OJdY4
/** $^ 'aCU0C
* @author treeroot lZ&]|*>
* @since 2006-2-2 AOp/d(vx5i
* @version 1.0 y[@\j9Hq
*/ 93IFcmO.H@
public class ImprovedMergeSort implements SortUtil.Sort { (]*H[)F/
q4UA]+-*
private static final int THRESHOLD = 10; =N);v\ Q$!
)c/Fasfg[P
/* |KYEK|
* (non-Javadoc) "&Qctk`<P
* ?8,%LIQ?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <As9>5|%
*/ g`k?AM\
public void sort(int[] data) { a4gi,pz$]
int[] temp=new int[data.length]; ]ALc;lb-}
mergeSort(data,temp,0,data.length-1); rs=q! P"u[
} QHBtWQgS
+KEkmXZ
private void mergeSort(int[] data, int[] temp, int l, int r) { E^hHH?w+
int i, j, k; k#}g,0@
int mid = (l + r) / 2; ?hYqcT[%
if (l == r) !5}l&7:(MN
return; JIO$=+p
if ((mid - l) >= THRESHOLD) #(LfYw.P1V
mergeSort(data, temp, l, mid); O;[9_[
else "tS'b+SJ-S
insertSort(data, l, mid - l + 1); ZiFooA
if ((r - mid) > THRESHOLD) JM.XH7k
mergeSort(data, temp, mid + 1, r); 'rb'7=z5
else .r+hERcB
insertSort(data, mid + 1, r - mid); (IbW;bV
[O ",
for (i = l; i <= mid; i++) { 9^F2$+T[:
temp = data; 8iC:xcN3
} 2WvN2"f3
for (j = 1; j <= r - mid; j++) { w'7R4
temp[r - j + 1] = data[j + mid]; m+$ @'TbP
} MVCl.o
int a = temp[l]; EA<}[4#jS
int b = temp[r]; E{Pgf8
for (i = l, j = r, k = l; k <= r; k++) { ^4v*W;Q
if (a < b) { T_<BVM
data[k] = temp[i++]; _L.n,
a = temp; % 0:p)Z0
} else { 7yI@"c#O
data[k] = temp[j--]; ps:f=6m2
b = temp[j]; P`1EPF
} _DPOyR2
} %bb~Y"
} -qV{WZHp
FdOFE.l
/** X7*`
* @param data fn{S "33"
* @param l J?:[$C5
* @param i |f2A89
*/ YJ7V`Np
private void insertSort(int[] data, int start, int len) { `BZ&~vJ_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |I[7,`C~
} '3l$al:H^
} $<?X7n^
} @=]8^?$t 0
} KT*:F(4`
X}4}&
堆排序： nw'-`*'rj
1@sM1WMX
package org.rut.util.algorithm.support; J_#R 87
0_<Nc/(P
import org.rut.util.algorithm.SortUtil; @u4=e4eF`
? S=W&
/** Sj 3oV
* @author treeroot Ln#a<Rx.E7
* @since 2006-2-2 ,i`h x, Rg
* @version 1.0 W,hWOO
*/ vrl[BPI
public class HeapSort implements SortUtil.Sort{ *ftC_v@p5
h!]"R<QQdu
/* (non-Javadoc) X.|Ygx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v1[_}N9f>H
*/ 0^!Gib
public void sort(int[] data) { JSMPyj
MaxHeap h=new MaxHeap(); h%#_~IA:|
h.init(data); 4,eQW[;kk
for(int i=0;i h.remove(); _ptP[SV^j
System.arraycopy(h.queue,1,data,0,data.length); uVU`tDzd:
} udqge?Tz
aSnp/g
private static class MaxHeap{ CUmH,`hu
89eq[ |G_
void init(int[] data){ d;suACW
this.queue=new int[data.length+1]; 0my9l;X
for(int i=0;i queue[++size]=data; m^Lj+=Z"
fixUp(size); 6517Km 4-
} M[Y4_$k<-
} <4?*$
}~enEZ
private int size=0; D,W\ gP/h%
hFb fNB3
private int[] queue; Z(!pYhLq
s^C;>
public int get() { !QC<n/
return queue[1]; u35q,u=I
} 3B18dv,V
Q9y*:
public void remove() { wa3F
SortUtil.swap(queue,1,size--); t3F?>G#y
fixDown(1); nmE5]Pcg
} 0^<,(]!
file://fixdown ,w\ wQn>]K
private void fixDown(int k) { 6Dzs?P
int j; %O) Z
while ((j = k << 1) <= size) { af>3V(7
if (j < size %26amp;%26amp; queue[j] j++; #vnT&FN0[
if (queue[k]>queue[j]) file://不用交换 {OxWcK\2@h
break; ^e9aD9
SortUtil.swap(queue,j,k); :0Te4UE;P7
k = j; Ee?;i<u
} (:}<xxl
} zHFTCL>"
private void fixUp(int k) { Wvr+y!F
while (k > 1) { $pu3Ig$^
int j = k >> 1; 4]BJ0+|mT
if (queue[j]>queue[k]) nP_=GI
break; x0x $ 9
SortUtil.swap(queue,j,k); kEAhTh&g*
k = j; zA{8C];~
} 3q~Fl=|.o
} F.KrZ3%4iB
{!K;`I[]v
} q) _r3
ER<eX4oU
} ]gP8?s|
UH40~LxIma
SortUtil： c^-YcGwa
xyV]?~7
package org.rut.util.algorithm; 9.8,q
DT? m/*
import org.rut.util.algorithm.support.BubbleSort; f'_S1\
import org.rut.util.algorithm.support.HeapSort; \!PV*%P
import org.rut.util.algorithm.support.ImprovedMergeSort; Jr?!Mh-
import org.rut.util.algorithm.support.ImprovedQuickSort; t,Q'S`eTU
import org.rut.util.algorithm.support.InsertSort; V4?Oc2mS
import org.rut.util.algorithm.support.MergeSort; hZF(/4Z2
import org.rut.util.algorithm.support.QuickSort; ,kE=TR.|
import org.rut.util.algorithm.support.SelectionSort; Tf l;7w.(A
import org.rut.util.algorithm.support.ShellSort; B!`\L!
3/tJDb5
/** q!2<=:f
* @author treeroot ;Uk!jQh
* @since 2006-2-2 AQn[*
* @version 1.0 E4m:1=Nd~]
*/ .;Z.F7{q
public class SortUtil { 5&%fkZ0
public final static int INSERT = 1; j];G*-iv{
public final static int BUBBLE = 2; [tN` :}?
public final static int SELECTION = 3; W"O-L
public final static int SHELL = 4; }bgo )<i
public final static int QUICK = 5; *.dKR
public final static int IMPROVED_QUICK = 6; (,TH~("{
public final static int MERGE = 7; | XLFV
public final static int IMPROVED_MERGE = 8; &<{}8/x8(
public final static int HEAP = 9; YAMfP8S
Xoi9d1fO
public static void sort(int[] data) { [Pqn3I[
sort(data, IMPROVED_QUICK); -7L
} !&0a<~Wi
private static String[] name={ )8]3kQffJ=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kpT>G$s~gy
}; &:#A+4&
~9i qD
private static Sort[] impl=new Sort[]{ K051usm
new InsertSort(), ]j1 vbk
new BubbleSort(), i0i`k^bA
new SelectionSort(), yI4DVu.
new ShellSort(), !3?~#e{_
new QuickSort(), 6'vi68
new ImprovedQuickSort(), R}.3|0
new MergeSort(), 1O9$W?)Q
new ImprovedMergeSort(), ,#Ln/;
new HeapSort() F#^L9
}; tzmETRwG
H CuK
public static String toString(int algorithm){ um{e&5jk
return name[algorithm-1]; w?/f Zx
} 64b<0;~
ze$Y=<S
public static void sort(int[] data, int algorithm) { e9}8RHy1$
impl[algorithm-1].sort(data); W%H]Uyt
} iGQ n/Xdo
BWohMT
public static interface Sort { {)uU6z {'
public void sort(int[] data); @oA0{&G{
} #\0TxG5'QA
d{l{P]nr
public static void swap(int[] data, int i, int j) { Jbkt'Z(&J
int temp = data; W\a!Q]pV
data = data[j]; Ba<#1p7_
data[j] = temp; YkVRl [
} @7]\y7D
} p&m ^IWD