[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; Joo)GIB
} +p}Xmn
int i1=l; L2O57rT2
int i2=mid+1; >]|^Ux,WZ
for(int cur=l;cur<=r;cur++){ wkpVX*DfRE
if(i1==mid+1) +bd{W]={
data[cur]=temp[i2++]; IlL
else if(i2>r) 1:s~ ]F@
data[cur]=temp[i1++]; :3*oAh8|
else if(temp[i1] data[cur]=temp[i1++]; Cwa0!y5%
else _,?HrL9
data[cur]=temp[i2++]; m)RxV@
} u]-El}*[
} F"#*8P
td$6:)
} xs`gN
|w]i$`3'I
改进后的归并排序: ;S27m]Q?
W",jZ"7
package org.rut.util.algorithm.support; ]"vdC}
g#3x)97Z
import org.rut.util.algorithm.SortUtil; J;Xz'0
IX3yNTW"L
/** ct/THq
* @author treeroot s"F,=]HQ!G
* @since 2006-2-2 !m5\w>
* @version 1.0 Jpnp'
*/ *<5lx[:4/x
public class ImprovedMergeSort implements SortUtil.Sort { / ^M3-5@Q
{"(|oIo{
private static final int THRESHOLD = 10; a#**96Av
-xEg"dY/
/* }slEkpk?]
* (non-Javadoc) [/^g) ^s:
* .kDCcnm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jXva?_
*/ cwU6}*_zn
public void sort(int[] data) { 1:V/['|*g)
int[] temp=new int[data.length]; RaqrVC
mergeSort(data,temp,0,data.length-1); Ps,w(k{d
} <"9Z7" >
L)"w-,zy
private void mergeSort(int[] data, int[] temp, int l, int r) { %['F[Mo
int i, j, k; KDzIarC
int mid = (l + r) / 2; qo![#s
if (l == r) imuHSxcaV
return; 1x8]&
if ((mid - l) >= THRESHOLD) %tjEVQa
mergeSort(data, temp, l, mid); ]z@]Fi33Y
else O$\N]#
insertSort(data, l, mid - l + 1); c9K\K~bk
if ((r - mid) > THRESHOLD) t*$@QO
mergeSort(data, temp, mid + 1, r); v2SsfhT
else 4K,&Q/Vdd7
insertSort(data, mid + 1, r - mid); ";%1sK
oOvbel`;
for (i = l; i <= mid; i++) { <CdO& xUY
temp = data; yw^,@'
} 9EQ,|zf'
for (j = 1; j <= r - mid; j++) { 3?<vnpN=5d
temp[r - j + 1] = data[j + mid]; #6nA^K}
} ~'Hwszpb
int a = temp[l]; .4-S|]/d,
int b = temp[r]; D=+sD"<|
for (i = l, j = r, k = l; k <= r; k++) { ENr&k(>0HQ
if (a < b) { U$%w"k7^(
data[k] = temp[i++]; HkCme_y"
a = temp; awtzt?VtLh
} else { B$n\m854
data[k] = temp[j--]; $~l:l[Zs
b = temp[j]; PI?[
} gqamGLK
} bEJZh%j!
} 1,,:4*)
NiF*h~q
/** 23m+"4t
* @param data -8:@xG2
* @param l e!yt<[ph
* @param i C$5x*`y
*/ Nsy.!,!c
private void insertSort(int[] data, int start, int len) { /fEXAk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s4\2lBU?
} 4H)a7<,
} bT |FJ\aC
} '>8N'*
} iQQJ`
4i\n1RW
堆排序： K,Vl.-4?
G5Nub9_*X
package org.rut.util.algorithm.support; sTONkd
G9TUU.T
import org.rut.util.algorithm.SortUtil; r0,}f\
{1mD(+pJ{
/** w67Pw
* @author treeroot b?l\QMvi
* @since 2006-2-2 Yi3DoaS;"
* @version 1.0 d4U_Wu&
*/ $0 )K [K
public class HeapSort implements SortUtil.Sort{ p}\!"&,^m
43YusUv
/* (non-Javadoc) u=5^xpI<D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G!uxpZ
*/ 4R.#=]F
public void sort(int[] data) { . Hw^Nx
MaxHeap h=new MaxHeap(); QHeUpJ/^
h.init(data); gw-l]@;1
for(int i=0;i h.remove(); V_:/#G]jeG
System.arraycopy(h.queue,1,data,0,data.length); *e=e7KC6kI
} {chl+au*l
4^ A\w
private static class MaxHeap{ #F kdcY
y_w4ei
void init(int[] data){ tO#y4<
this.queue=new int[data.length+1]; gBN;j
for(int i=0;i queue[++size]=data; Xg"=,j2
fixUp(size); FTn[$q
} (_D#gr{S=
} FRr<K^M
nX~sVG{Q
private int size=0; D0~mu{;c$
s;L7 _.hH@
private int[] queue; 4GJsVA(d|
/PO5z7n0J
public int get() { +g*Ko@]m>
return queue[1]; fz%urbJR
} -LF^u;s8&S
w%htY.-
public void remove() { 0@>3fR
SortUtil.swap(queue,1,size--); 7yKadM~)
fixDown(1); $WDa}~j~^
} {?82>q5F
file://fixdown TB9ukLG^<<
private void fixDown(int k) { v vFX\j3
int j; ke/QFN-`
while ((j = k << 1) <= size) { N(Cfv3{
if (j < size %26amp;%26amp; queue[j] j++; 3K{'~?mM
if (queue[k]>queue[j]) file://不用交换 E[ ,Ur`>:
break; n-uoY<;hp
SortUtil.swap(queue,j,k); SJL?(S*
k = j; wzF"^CJ
} SNcaIzbr
} '/mwXvl
private void fixUp(int k) { I~Ziq10
while (k > 1) { ]R(=)
int j = k >> 1; +~HL"Vv
if (queue[j]>queue[k]) 2x0[@cTi?
break; z@dHXj )
SortUtil.swap(queue,j,k); J 5~bs*a8
k = j; xGN&RjPk\
} Bc$t`PI
} \qKh9
zbrDDkZ1
} ,_HVPE
N|wI=To
} +n7bbuxj(X
=*fOej>G
SortUtil： .z+[3Oj_E
JS}iNS'X
package org.rut.util.algorithm; Y}QtgZEt
aVEg%8
import org.rut.util.algorithm.support.BubbleSort; ;>bcI).
import org.rut.util.algorithm.support.HeapSort; 4vF1
import org.rut.util.algorithm.support.ImprovedMergeSort; XI@;;>D1=U
import org.rut.util.algorithm.support.ImprovedQuickSort; ,iV|^]X3$/
import org.rut.util.algorithm.support.InsertSort; *Mk5*_
import org.rut.util.algorithm.support.MergeSort; ,5.ve)/dE
import org.rut.util.algorithm.support.QuickSort; "{Lp'+wNw
import org.rut.util.algorithm.support.SelectionSort; 4@- 'p
import org.rut.util.algorithm.support.ShellSort; [BWA$5D)Ny
r Z%l?(
/** w*n@_n={
* @author treeroot )cxLpTr
* @since 2006-2-2 ,ir(~g+{g
* @version 1.0 +/E`u|%|\]
*/ 4-1=1)c*
public class SortUtil { ^z>3+oi
public final static int INSERT = 1; e'Njl?>3
public final static int BUBBLE = 2; Fu].%`*xJ
public final static int SELECTION = 3; >NDI<9<'0}
public final static int SHELL = 4; {B+|",O5)
public final static int QUICK = 5; G&,F-|`
public final static int IMPROVED_QUICK = 6; TL'^@Y7X5
public final static int MERGE = 7; [M?'Nw/[S
public final static int IMPROVED_MERGE = 8; AUBZ7*VO
public final static int HEAP = 9; dz_~_|
3 vr T`
public static void sort(int[] data) { P3Ocfpf Bp
sort(data, IMPROVED_QUICK); ;d5d$Np@m&
} "h58I)O
private static String[] name={ NpqK+GO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @~1}n/
}; vf}.)
w\SfzJN
private static Sort[] impl=new Sort[]{ H.-VfROi2
new InsertSort(), [ 'aSPA
new BubbleSort(), 4@0y$Dv\
new SelectionSort(), \?EnTu.
new ShellSort(), 'wA4}f
new QuickSort(), 4+?d0
new ImprovedQuickSort(), ZE393FnE
new MergeSort(), s&.VU|=VQ@
new ImprovedMergeSort(), A-S!Z2m\
new HeapSort() E)ne z
}; :9?y-X
a]NH >d
public static String toString(int algorithm){ s[2>r#M
return name[algorithm-1]; O> .gcLA
} }LYK:?_/
KdN+$fe*g
public static void sort(int[] data, int algorithm) { 7j,u&%om
impl[algorithm-1].sort(data); >oYr=O
} ^t0Yh%V7
jq_E{Dq1
public static interface Sort { $*-UY
public void sort(int[] data); $-4 Zi
} E'KKR1t
25R6>CXsi
public static void swap(int[] data, int i, int j) { sW#OA\i&
int temp = data; pXap<T
data = data[j]; {VK
data[j] = temp; RvXK?mL4F
} 0cF+4,5
} d,y%:F 4