[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; j^T i6F>f
} _{C =d3
int i1=l; Pb]EpyAW
int i2=mid+1; {qJ(55
for(int cur=l;cur<=r;cur++){ x:? EL)(
if(i1==mid+1) 3oQ?VP
data[cur]=temp[i2++]; NMvNw?]
else if(i2>r) /8O;Q~a
data[cur]=temp[i1++]; UhX)?'J
else if(temp[i1] data[cur]=temp[i1++]; ]aZ3_<b
else %wQE lkB
data[cur]=temp[i2++]; qS!U1R?s
} PAy/"R9DT-
} Dk^T_7{
WJ&a9]&C
} gucgNpX
%E"dha JY
改进后的归并排序: PR2;+i3
)JXlPU
package org.rut.util.algorithm.support; c}G\F$
PNp-/1Cx
import org.rut.util.algorithm.SortUtil; VkD}gJY
/J5)_>R:
/** ]kir@NMv>
* @author treeroot >Tp`Kri
* @since 2006-2-2 Zsto8wuf#
* @version 1.0 DedY(JOvB
*/ 0% zy 6{
public class ImprovedMergeSort implements SortUtil.Sort { 9=}&evGm89
/=@V5)
private static final int THRESHOLD = 10; |44 E:pA
A|`mIma#
/* 6 =H]p1p~O
* (non-Javadoc) L;i(@tp|v
* s= bP@[Gj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :\"V5
*/ MC~<jJ,
public void sort(int[] data) { \"|7o8
int[] temp=new int[data.length]; ~vscATQ
mergeSort(data,temp,0,data.length-1); {%BPP{OFk
} 3Hi[Y[O`%P
9YvK<i&I
private void mergeSort(int[] data, int[] temp, int l, int r) { <i ";5+
int i, j, k; 7?p>v34A
int mid = (l + r) / 2; DmiZ"A
if (l == r) =`OnFdI
return; Fql|0Fq
if ((mid - l) >= THRESHOLD) l_i&8*=Px
mergeSort(data, temp, l, mid); J,D^fVIw
else QIC? `hk1
insertSort(data, l, mid - l + 1); fA"9eUu
if ((r - mid) > THRESHOLD) ^u+#x2$Mg
mergeSort(data, temp, mid + 1, r); ~[Z,:=z
else mO0}Go8
insertSort(data, mid + 1, r - mid); .YlhK=d4
_W
for (i = l; i <= mid; i++) { $g!iy'4n*
temp = data; {:TOm0eK
} 7srq~;j3
for (j = 1; j <= r - mid; j++) { 560`R>
temp[r - j + 1] = data[j + mid]; bWg!/K55
} R*l3 zn>
int a = temp[l]; dfMi]rs!<
int b = temp[r]; Lk]W?
for (i = l, j = r, k = l; k <= r; k++) { 6FFM-9*|[
if (a < b) { ftaa~h*
data[k] = temp[i++]; )?<V-,D
a = temp; FyWrb+_0v
} else { 9P&{Xhs7
data[k] = temp[j--]; &l~9FE*
b = temp[j]; ;$g?W"
} 7_~_$I~g*
} )ml#2XP!f
} T_ga?G<
>Q2kXwN
/** Wg=qlux-
* @param data a49t/
* @param l ay,"MJ2
* @param i F13vc~$Ky
*/ C#@-uo2
private void insertSort(int[] data, int start, int len) { o]aMhSol
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jGEmf<q&u
} |F49<7XB[~
} fS]Z`U"
} l9naqb:iP
} M:t"is
er.;qV'Wz6
堆排序： Q#lFt,.y
Huc|HL#C
package org.rut.util.algorithm.support; Vx%!j&
D77s3AyHK
import org.rut.util.algorithm.SortUtil; "eIE5h
SedVp cb+
/** +R',$YzD
* @author treeroot v9 8s78
* @since 2006-2-2 F./P,hhN9
* @version 1.0 "h:#'y$V
*/ 59H~qE1Md
public class HeapSort implements SortUtil.Sort{ &F.L*M
oA+'9/UY
/* (non-Javadoc) ut^6UdJ+`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) scPvuHzl
*/ &sooXKlv|
public void sort(int[] data) { 0QY9vuhL<
MaxHeap h=new MaxHeap(); Ga\kvMtr
h.init(data); XblZlWP#
for(int i=0;i h.remove(); &#;lmYyaui
System.arraycopy(h.queue,1,data,0,data.length); wPvYnhr|G-
} `S|T&|ad0
.>NPgdI
private static class MaxHeap{ {yM@3v~
T~~K~a\8
void init(int[] data){ lz4M)pL^
this.queue=new int[data.length+1]; cd;~60@K
for(int i=0;i queue[++size]=data; LJOJ2x
fixUp(size); fv:&?gc
} h]WW?.
} ,p V3O`z
I^m9(L4%
private int size=0; <f;Xs(
|N0RBa4%
private int[] queue; {2LG$x-N%
[bjP-pX
public int get() { aPin6L$;)
return queue[1]; MPMAFs
} %:8XZf
K1t>5zm
public void remove() { V U~r~
SortUtil.swap(queue,1,size--); COcS w
fixDown(1); QG 1vP.K
} g2 tM!IRQ
file://fixdown ;FnS=Z
private void fixDown(int k) { OE2r2ad
int j; )D"2Q:
while ((j = k << 1) <= size) { v[~Q
if (j < size %26amp;%26amp; queue[j] j++; ?I7%ueFY
if (queue[k]>queue[j]) file://不用交换 B<jVo%og
break; r[P+F
SortUtil.swap(queue,j,k); }LryRcrD-n
k = j; 2U) 0k*
} R(IYb%L
} [s F/sa3
private void fixUp(int k) { @O8X )
while (k > 1) { V eLGxc
int j = k >> 1; iZ9ed]mf
if (queue[j]>queue[k]) ]JlM/
break; ddEV@2F
SortUtil.swap(queue,j,k); hs<OzM
k = j; 0F<$Zbe2B
} Dyh|F\T
} uHPd!#]
u2cDSRrqT
} I[P_j`aE
$ZRvvm!f
} V L;<+C~
%18%T{|$e
SortUtil： Z<`:xFy(
cQq78Lo
package org.rut.util.algorithm; }r|$\ms
qsdgG1<
import org.rut.util.algorithm.support.BubbleSort; a7"Aq:IjU
import org.rut.util.algorithm.support.HeapSort; bf6:J `5Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ?L6pB]l8b
import org.rut.util.algorithm.support.ImprovedQuickSort; < mp_[-c
import org.rut.util.algorithm.support.InsertSort; v8>bR|n5
import org.rut.util.algorithm.support.MergeSort; AL*M`m_
import org.rut.util.algorithm.support.QuickSort; u_6x{",5I
import org.rut.util.algorithm.support.SelectionSort; t>eeOWk3
import org.rut.util.algorithm.support.ShellSort; Zo@
N]&:xd5
/** `{xKU8j^
* @author treeroot j>Cp4
* @since 2006-2-2 NZZc[P
* @version 1.0 !mK}Rim~
*/ y0,>_MS
public class SortUtil { MbXtmQ%C8
public final static int INSERT = 1; sZ#U{LI
public final static int BUBBLE = 2; Dq`$3ZeA
public final static int SELECTION = 3; y':65NMda
public final static int SHELL = 4; B[fbPrM
public final static int QUICK = 5; , nW)A/?}
public final static int IMPROVED_QUICK = 6; w-LaSJ(T
public final static int MERGE = 7; CM;B{*En
public final static int IMPROVED_MERGE = 8; ) h=[7}|
public final static int HEAP = 9; iIc/%< ;
%nyZ=&u
public static void sort(int[] data) { u|75r%p>
sort(data, IMPROVED_QUICK); t"X^|!hKIF
} 0}WDB_L
private static String[] name={ 7|(o=+Bt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fzzk#jU
}; 13f'zx(AO
h/..cVD,K
private static Sort[] impl=new Sort[]{ X;CRy,
new InsertSort(), 9)D9'/{L#
new BubbleSort(), n= FOB0=
new SelectionSort(), L+_ JKc
new ShellSort(), O T .bXr~
new QuickSort(), Dmr3r[
new ImprovedQuickSort(), '?d5L+9
new MergeSort(), H Yw7*
new ImprovedMergeSort(), t_id/
new HeapSort() d?N[bA
}; MC%!>,tC
3Hf_!C=g
public static String toString(int algorithm){ HEF\TH9
return name[algorithm-1]; !%/(a)B$^$
} mLDuizWI
+f'@
public static void sort(int[] data, int algorithm) { ebhV;Q.
impl[algorithm-1].sort(data); -AwkP
} ~{l @
s,H }km
public static interface Sort { *z)+'D*+
public void sort(int[] data); R6\|:mI,$
} rAA?{(!9x
X-`PF
public static void swap(int[] data, int i, int j) { +7r?vo1
int temp = data; DtkOb,wY
data = data[j]; pI( H7 (
data[j] = temp; - @tL]]
} ;OSEMgB1
} TbgIr