[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; dF#`_!4pbf
} BJ,D1E
int i1=l; I%#&@
int i2=mid+1; y2=`NG=
for(int cur=l;cur<=r;cur++){ s(u,mtG
if(i1==mid+1) k __MYb
data[cur]=temp[i2++]; NB@TyU
else if(i2>r) #eZm)KFQg
data[cur]=temp[i1++]; [i 7^a/e
else if(temp[i1] data[cur]=temp[i1++]; {%! >0@7
else $?FA7=_
data[cur]=temp[i2++]; &'{?Y;A
} }r _d{nhi
} SAUfA5|e
W}0cM9 g
} ^h^\kW'#
FQp@/H^
改进后的归并排序: 7JL*y\'
~bsL W:.'
package org.rut.util.algorithm.support; CA8N
S`?L\R.:
import org.rut.util.algorithm.SortUtil; %'`L+y
Xpp%j
/** |u5Xi5q.f
* @author treeroot T x 6\
* @since 2006-2-2 M%S.Z4D (0
* @version 1.0 |Js?@
*/ V#-\ 4`c
public class ImprovedMergeSort implements SortUtil.Sort { 3`%U)gCT5
M"l<::z
private static final int THRESHOLD = 10; wLW[Vur[
6:$+"@ps
/* PS\n0
* (non-Javadoc) 8Vf]K}d
* fHc/5uYW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;mtv
*/ ?K>=>bS^h
public void sort(int[] data) { L4)
int[] temp=new int[data.length]; 1nAAs;`'
mergeSort(data,temp,0,data.length-1); 23_\UTM}1
} Dc;zgLLL
g$a 5
private void mergeSort(int[] data, int[] temp, int l, int r) { >/eV4ma"
int i, j, k; /tqQAvj
int mid = (l + r) / 2; p*l]I*x'<
if (l == r) Ph Ep3o&"
return; <>I4wqqb
if ((mid - l) >= THRESHOLD) k}tTl 2
mergeSort(data, temp, l, mid); "H"4]m1Wc
else YgfQ{3^I
insertSort(data, l, mid - l + 1); iLR^V!
if ((r - mid) > THRESHOLD) PEIf)**0N
mergeSort(data, temp, mid + 1, r); Z7:TPY$b
else Sn~h[s_(
insertSort(data, mid + 1, r - mid); sY*iRq
]Ac&h aAP
for (i = l; i <= mid; i++) { -!JnyD
temp = data; \Ng|bWR>LQ
} gPYF2m
for (j = 1; j <= r - mid; j++) { %`b %TH^
temp[r - j + 1] = data[j + mid]; XI8rU)q
} ]%I}hjJ
int a = temp[l]; Oqy&V&-C
int b = temp[r]; =(%+S<}
for (i = l, j = r, k = l; k <= r; k++) { %hO/2u
if (a < b) { Uc>$w?oA
data[k] = temp[i++]; ~Q36lR
a = temp; C;BC@OE
} else { $EUlh^
data[k] = temp[j--]; [L4s.l_#
b = temp[j]; |WMP_sGn
} g2t'u4>
} hDAxX=FM
} VzZ'W[/7)B
5L%\rH&N
/** s J~WzQ
* @param data JS{trqc1d
* @param l !b:;O +[
* @param i cZd{K[fuK
*/ /ltGSl
private void insertSort(int[] data, int start, int len) { Gj9WUv[P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WK)2/$7@
} W]l&mr
} ),53(=/hl
} D @bnm s
} i*9Bu;
SZ)AO8&
堆排序： ,]* MI"
~wl4
package org.rut.util.algorithm.support; mYRW/8+g
+PfXc?VU
import org.rut.util.algorithm.SortUtil; Wd78 bu|
!T3b]0z
/** 0'Y'K6hG`
* @author treeroot 1GA$nFBVC
* @since 2006-2-2 F9\T<
* @version 1.0 kEr;p{5
*/ ,'0Zd(s
public class HeapSort implements SortUtil.Sort{ !caY
)~CnDk}^R
/* (non-Javadoc) `L#`WC@[o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pjVF^gv,*
*/ ICxj$b
public void sort(int[] data) { ,Q>RtV
MaxHeap h=new MaxHeap(); E Qn4+
h.init(data); ,y%4QvG7a
for(int i=0;i h.remove(); :K]&rGi,
System.arraycopy(h.queue,1,data,0,data.length); <{xU.zp'
} zFpM\{`[g
G:k]tZ*`
private static class MaxHeap{ ugT;NB
$ &III
void init(int[] data){ {P[>B}'rW
this.queue=new int[data.length+1]; hI Q 2s
for(int i=0;i queue[++size]=data; xLp<G(;
fixUp(size); -Nn@c|fz
} YB&b_On,f
} 5l]G1+
08 $y1;
private int size=0; I(2qXOG
Y(D&JKx
private int[] queue; qzbpLV|
:\sz`p?EC
public int get() { A\IQM^i
return queue[1]; <!m'xOD
} zUNWcv!& "
l]wjH5mz=i
public void remove() { 2qQG
SortUtil.swap(queue,1,size--); n9p_D
fixDown(1); W7 iml|WV0
} +q NX/F
file://fixdown BXx0Z %e.3
private void fixDown(int k) { t!S ja
int j; 9+!1jTGSkf
while ((j = k << 1) <= size) { |yT-N3H@
if (j < size %26amp;%26amp; queue[j] j++; AXmW7/Sj"
if (queue[k]>queue[j]) file://不用交换 @s[Vtw%f
break; #Y9'n0 AL
SortUtil.swap(queue,j,k); qT}AY.O%^
k = j; g82_KUkB
} CRKuN
} w!8xZu
private void fixUp(int k) { FK~FC:K
while (k > 1) { J#OiY
int j = k >> 1; JxlU=7cF
if (queue[j]>queue[k]) 1>wQ&{
break; g~#HiBgWq[
SortUtil.swap(queue,j,k); ZM$}Xy\9
k = j; FR%u1fi
} PRo;NE
} Uw:gJ9
SmR"gu
} Y%"6
@2HNYW)
} 0w24lVR.
E?@batIrf
SortUtil： KTzkJx
mxxuD"5
package org.rut.util.algorithm; h%0hryGB
Q \E[py
import org.rut.util.algorithm.support.BubbleSort; n@"h^-
import org.rut.util.algorithm.support.HeapSort; ?~g X7{>
import org.rut.util.algorithm.support.ImprovedMergeSort; ]EhU8bZ
import org.rut.util.algorithm.support.ImprovedQuickSort; (w+dB8)X
import org.rut.util.algorithm.support.InsertSort; ~ R:=zGDV
import org.rut.util.algorithm.support.MergeSort; qDzd_E@aR
import org.rut.util.algorithm.support.QuickSort; W\W|v?r
import org.rut.util.algorithm.support.SelectionSort; B)1.CHV%<
import org.rut.util.algorithm.support.ShellSort; M1sR+e$"
p~h)@
/** &1k2J
* @author treeroot ejID5NqG
* @since 2006-2-2 t(,_
* @version 1.0 4PVkKP'/
*/ vxmz3ht,Q
public class SortUtil { OB&lq.r
public final static int INSERT = 1; \4B2%H
public final static int BUBBLE = 2; /'S@iq
public final static int SELECTION = 3; n,.ZLuBEX
public final static int SHELL = 4; 4Em$L]7
public final static int QUICK = 5; +d=cI
public final static int IMPROVED_QUICK = 6; |i-d#x8
public final static int MERGE = 7; '&<T;V%
public final static int IMPROVED_MERGE = 8; !4ZszQg
public final static int HEAP = 9; k'hJ@6eKS
Gx.iZOOH/
public static void sort(int[] data) { 9sR?aW^$,/
sort(data, IMPROVED_QUICK); mV58&SZT
} 9)Jc'd|
private static String[] name={ HS% P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k8~/lE.Wy
}; H$j`75#u?-
) C?emTih
private static Sort[] impl=new Sort[]{ VXpbmg!{S
new InsertSort(), P%-@AmO^_
new BubbleSort(), )w.\xA~|
new SelectionSort(), k~<b~VcU
new ShellSort(), /<\B8^yQ
new QuickSort(), Ul41RNy)
new ImprovedQuickSort(), >>'t7U##
new MergeSort(), T<\!7RnLc
new ImprovedMergeSort(), ~S='~ g)
new HeapSort() ATdK)gG
}; XehpW}2\
(zm5 4 Vm
public static String toString(int algorithm){ QnWM<6xK"
return name[algorithm-1]; <`~zKFUQ[
} ]B;\?Tim
`9+>2*k
public static void sort(int[] data, int algorithm) { 2L'vB1`
impl[algorithm-1].sort(data); wGXnS"L!
} yLo{^4a.
##6_kcL:6G
public static interface Sort { R-8/BTls7
public void sort(int[] data); le*1L8n$'
} NvZ )zE
axRzn:f
public static void swap(int[] data, int i, int j) { 7:Jyu/*]
int temp = data; -]uN16\ F
data = data[j]; 8, >YB+Hb
data[j] = temp; z&"-%l.b@}
} u)DhkF|
} #\Q{?F!4