[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; \<0B1m
} ;^Sr"v6r>u
int i1=l; (m[bWdANnW
int i2=mid+1; M@1r:4CoKH
for(int cur=l;cur<=r;cur++){ Qcjc,
if(i1==mid+1) x3ERCqTR
data[cur]=temp[i2++]; 5l-mW0,MK
else if(i2>r) YNrp}KQ
data[cur]=temp[i1++]; J/!cGr(B~
else if(temp[i1] data[cur]=temp[i1++]; e(F42;$$
else 4F3x@H'
data[cur]=temp[i2++]; q_W0/Ki8
} jDM w2#<
} *1Z5+uVT[
y7i%W4
} FSuAjBl0-
iJxQB\x
改进后的归并排序: h0Z{,s}
g$:Xuw1
package org.rut.util.algorithm.support; Si9Z>MR
Q^K"8 ;
import org.rut.util.algorithm.SortUtil; 8.=\GV
\,Lo>G`!
/** g42)7
* @author treeroot %Pqk63QF
* @since 2006-2-2 F 09DV<j
* @version 1.0 $eV$2p3H
*/ \o-&f:
public class ImprovedMergeSort implements SortUtil.Sort { ZR v"h/~
RC|!+TD
private static final int THRESHOLD = 10; /"H`.LD.?
w=h1pwY
/* e6B{QP#jq
* (non-Javadoc) 8@{OR"Ec
* 7?gFy-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3cS2gxF
*/ {j{+0V
public void sort(int[] data) { )?M9|u
int[] temp=new int[data.length]; |sZ!
mergeSort(data,temp,0,data.length-1); Uawpfgc}
} "N:XzG
K-<^$VWh
private void mergeSort(int[] data, int[] temp, int l, int r) { R:JX<Ba
int i, j, k; Ll4bdz,
int mid = (l + r) / 2; C'=k&#<-
if (l == r) !|q<E0@w\
return; %S` v!*2
if ((mid - l) >= THRESHOLD) YJS{i
mergeSort(data, temp, l, mid); oBq 49u1
else q{2I_[p
insertSort(data, l, mid - l + 1); }ZSQ>8a
if ((r - mid) > THRESHOLD) 49Df?sx
mergeSort(data, temp, mid + 1, r); MaBYk?TR~
else vkS)E0s
insertSort(data, mid + 1, r - mid); `I$<S(h7
1QZ&Mj^^
for (i = l; i <= mid; i++) { _ ~RpGX
temp = data; CSbI85F
} .I VlEG0
for (j = 1; j <= r - mid; j++) { 0yx3OY
temp[r - j + 1] = data[j + mid]; N!Qg;(
} WD;Y~|
int a = temp[l]; z|7zj/+g
int b = temp[r]; ~m1P_`T
for (i = l, j = r, k = l; k <= r; k++) { b96%")
if (a < b) { B()/.w?A
data[k] = temp[i++]; "xMD,}+5$$
a = temp; 1Kvx1p
} else { i`/+,<
data[k] = temp[j--]; b5m=7;u*h
b = temp[j]; .,~(%#Wl$
} A`}yBSb
} m|=Ecu
} cw&Hgjj2
wi8Yl1p]!z
/** ~'5
* @param data Uw-p758dD
* @param l hqk}akXt
* @param i h=kQ$`j6
*/ iyVB3:M
private void insertSort(int[] data, int start, int len) { 7f<EoSK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -IlJ^Al4
} -16K7yk
} 2eeQ@]Wj[Z
} kVI#(uO
} E$a ?LFa6
(3[z%@I
堆排序： 7@.cOB`y@3
1[*UYcD
package org.rut.util.algorithm.support; *'"T$ib
H4OhIxK
import org.rut.util.algorithm.SortUtil; ky>wOaTmN6
NVIK>cT6
/** T{]~07N?
* @author treeroot [md u!!*
* @since 2006-2-2 ]maYUKqv}'
* @version 1.0 L.xZ_ 6
*/ C^t(^9
public class HeapSort implements SortUtil.Sort{ =S[yE]v^
0Iud$Lu
/* (non-Javadoc) 7z\m; 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IdIrI
*/ #jpoHvth
public void sort(int[] data) { 3:"]Rn([P
MaxHeap h=new MaxHeap(); c/L>>t
h.init(data); =H0vE7{*
for(int i=0;i h.remove(); H?}[r)|(3i
System.arraycopy(h.queue,1,data,0,data.length); P+MA*:
} A392=:N+Q
nI*/Mhx
private static class MaxHeap{ Q@e[5RA+]
Mcw4!{l`
void init(int[] data){ n[Zz]IO,g
this.queue=new int[data.length+1]; -K(fh#<6KO
for(int i=0;i queue[++size]=data; K|C^l;M6
fixUp(size); $@\mpwANl
} yix'rA-T
} rOW-0B+N
|W$DVRA
private int size=0; l5Y/Ok0,
nfb]VN~(
private int[] queue; nqR?l4 DX
L?_7bXoD
public int get() { : FAH\
return queue[1]; Bhqft;Nuh
} /wQL
]DFXPV
public void remove() { U,/6;}
SortUtil.swap(queue,1,size--); eLwTaW !C
fixDown(1); UX`]k{Mz
} EG'[`<*h
file://fixdown -]Cc
private void fixDown(int k) { gw+9x<e
int j; xy+QbDT
while ((j = k << 1) <= size) { "O+5R(XT
if (j < size %26amp;%26amp; queue[j] j++; nmlPX7!{$
if (queue[k]>queue[j]) file://不用交换 E{=2\Wkcp
break; O#nR>1h
SortUtil.swap(queue,j,k); _ 7oV<
k = j; k<w(i k1bi
} 89{HJ9}
} l=`L7| ^/d
private void fixUp(int k) { @vgG1w
while (k > 1) { uBg 8h{>
int j = k >> 1; /)N@M
if (queue[j]>queue[k]) ^/wfXm
break; s)voII&
SortUtil.swap(queue,j,k); aI zv
k = j; c_{z(W"
} F}J-gZl
} /9Q3iV$I]
nM=e]qH
} Y**|N8e
QH4wUU3X
} a\kb^D=T
HQ!Xj.y
SortUtil： puSLqouTM
C2]Kc{4
package org.rut.util.algorithm; B;Nl~Y|\
]!1OH |Ad
import org.rut.util.algorithm.support.BubbleSort; #Z=tJ
import org.rut.util.algorithm.support.HeapSort; O9v_y+M+M
import org.rut.util.algorithm.support.ImprovedMergeSort; Mr+@c)
import org.rut.util.algorithm.support.ImprovedQuickSort; < V\Y@Ei+
import org.rut.util.algorithm.support.InsertSort; 7RU}FE
import org.rut.util.algorithm.support.MergeSort; >-T`0wI
import org.rut.util.algorithm.support.QuickSort; *, Ld/O;s
import org.rut.util.algorithm.support.SelectionSort; zHB_{(o7
import org.rut.util.algorithm.support.ShellSort; f<i7@%
Rg29
/** F9c`({6k
* @author treeroot RnVtZ#SCh
* @since 2006-2-2 m!XI{F@x
* @version 1.0 "re-@Baw
*/ u#W5`sl
public class SortUtil { BUUf;Vv
public final static int INSERT = 1; TL= YQA
public final static int BUBBLE = 2; RKd
public final static int SELECTION = 3; ydl jw
public final static int SHELL = 4; 4kp im
public final static int QUICK = 5; UbJ*'eoX
public final static int IMPROVED_QUICK = 6; Ue5O9;y]u
public final static int MERGE = 7; UIJx*
public final static int IMPROVED_MERGE = 8; x9>\(-uU
public final static int HEAP = 9; '6Qy/R
qg z*'_S
public static void sort(int[] data) { NCeaL-y7
sort(data, IMPROVED_QUICK); OQ/<-+<w
} ^jdL@#k00
private static String[] name={ r'/;O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OL59e%X
}; ofc.zwH
,reJ(s
private static Sort[] impl=new Sort[]{ =<f-ob8,
new InsertSort(), jdut4 nFc
new BubbleSort(), `Y?t@dd
new SelectionSort(), hVoNw6fE
new ShellSort(), R)Q4
new QuickSort(), 9V1cdb~?"T
new ImprovedQuickSort(), Dkw%`(Oh/,
new MergeSort(), O[~x_xeW
new ImprovedMergeSort(), S{F-ttS"
new HeapSort() 2)iD4G`
}; / YiQ\
ux2013C_
public static String toString(int algorithm){ Zp`T
return name[algorithm-1]; suJ_nb
} S[M4ukYK
A(6xg)_XQ
public static void sort(int[] data, int algorithm) { eOO+>%Z
impl[algorithm-1].sort(data); MlO-+}`_+
} d<p2/aA
@B1{r|-<^
public static interface Sort { SDJH;c0
public void sort(int[] data); Pd=,$UQp
} aA*9,
l4'~}nn(Y
public static void swap(int[] data, int i, int j) { >}+Q:iNQ)2
int temp = data; a^nAZ
data = data[j]; uq7T{7~<
data[j] = temp; Os),;W0w4
} Bl.u=I:Y4
} eBB:~,C^q.