[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; E^<.;
} \4r?=5v*
int i1=l; @Nk]f
int i2=mid+1; #pm0T1+jW
for(int cur=l;cur<=r;cur++){ FZW:dsm
if(i1==mid+1) Lp}>WCams
data[cur]=temp[i2++]; T($6L7 j9
else if(i2>r) N&'05uWY}
data[cur]=temp[i1++]; bcCCvV}6WZ
else if(temp[i1] data[cur]=temp[i1++]; H^\2,x Z
else b3RCsIz
data[cur]=temp[i2++]; Z UCz-53
} 0zvA>4cq)
} "Ooc;xD3<
(aa}0r5
} P-c<[DSM'I
3~&h9#7Ke
改进后的归并排序: :4, OA
qe\JO'g#e
package org.rut.util.algorithm.support; hB:}0@l6p=
y8QJ=v* B
import org.rut.util.algorithm.SortUtil; n'-?CMH`
=TzmhX5
/** |KQkmc
* @author treeroot 4Ev#`i3~
* @since 2006-2-2 /5Zt4&r
* @version 1.0 K@UQ O
*/ _~_E(rTn
public class ImprovedMergeSort implements SortUtil.Sort { ejuw+@ _
}co*%F{1
private static final int THRESHOLD = 10; ^&mJDRe
'3MCb
/* *>,CG:`D
* (non-Javadoc) ")cJA f
* cLpkgK&a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) klKd !
*/ 9gLUM$Kd
public void sort(int[] data) { }&{z-/;H
int[] temp=new int[data.length]; `0qBuE_^h
mergeSort(data,temp,0,data.length-1); rL=_z^.P
} ">pt,QV
}wh sZ
private void mergeSort(int[] data, int[] temp, int l, int r) { &S8Pnb)d
int i, j, k; ief~*:5
int mid = (l + r) / 2; 8 FqhSzw
if (l == r) ;HOOo>%_K
return; 8.'[>VzBL
if ((mid - l) >= THRESHOLD) ?pAO?5Z:}
mergeSort(data, temp, l, mid); lW!}OzE(m
else nbGB84
insertSort(data, l, mid - l + 1); qf7oG0
if ((r - mid) > THRESHOLD) L`M.Htm8
mergeSort(data, temp, mid + 1, r); 69o,T`B
else >O:31Uk
insertSort(data, mid + 1, r - mid); wLDWD,"K
EM.7,;|N
for (i = l; i <= mid; i++) { [= GVK
temp = data; I,:R~^qJ8v
} #00k7y>OyD
for (j = 1; j <= r - mid; j++) { &3nbmkM
temp[r - j + 1] = data[j + mid]; 45u\v2,C3
} z`^DQ8+\j
int a = temp[l]; ZDI%?.U
int b = temp[r]; Ev R6^n/
for (i = l, j = r, k = l; k <= r; k++) { *,UD&N_)*6
if (a < b) { NiCH$+c\
data[k] = temp[i++]; ^zMME*G
a = temp; ,.cNs5[t
} else { qJQ!e
data[k] = temp[j--]; G9/5KW}-
b = temp[j]; mv,<#<-W
} B4<W%lm
} RO([R=.`/
} TH`zp]0
7.r}98V
/** !F|mCEU
* @param data q]-CTx$
* @param l M%3\]&
* @param i abHW[VP9
*/ u]B15mT?
private void insertSort(int[] data, int start, int len) { jWg7RuN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6%p$C oR
} n>_EEw2/
} V>{G$(v$
} wX0m8"g@
} =*icCng
&nc0stuL
堆排序： MpV3.
,+u.FQv~
package org.rut.util.algorithm.support; DA/l`Pn
]8}+%P,Q
import org.rut.util.algorithm.SortUtil; JH%^FF2
[|=#~(yYQ
/** ,s%1#cbR
* @author treeroot e~#"#?
* @since 2006-2-2 pT90TcI2
* @version 1.0 xm)s%"6n
*/ 1N`1~y
public class HeapSort implements SortUtil.Sort{ Wz}8O]#/.
];-DqK'
/* (non-Javadoc) qfO=_z ES
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^1a/)Be{_
*/ PY4RwN
public void sort(int[] data) { RGeM.
MaxHeap h=new MaxHeap(); 23lLoyN
h.init(data); J3]W2m2Zw
for(int i=0;i h.remove(); 5}4f[
System.arraycopy(h.queue,1,data,0,data.length); W>ziA
} {*=+g>RgD
UBmD 3|Zo
private static class MaxHeap{ re\@v8w~
LqH<HGMFD
void init(int[] data){ 2k }:)]m
this.queue=new int[data.length+1]; ?e`4 sf_~
for(int i=0;i queue[++size]=data; KuU]enC3
fixUp(size); (RDY-~#~
} E&\dr;{7
} Bs@!S?
Zu4|1W
private int size=0; I9! eL4e
;XJK*QDN
private int[] queue; /Hox]r]'e
tQSj[Yl
public int get() { O'6zV"<P
return queue[1]; xiu?BP?V
} 7x/S4Gs'4
nkKiYr
public void remove() { AL%gqt]
SortUtil.swap(queue,1,size--); ugtzF
fixDown(1); `EV" /&`
} ]=s!cfu
file://fixdown [DW}z
private void fixDown(int k) { qf/1a CQiP
int j; T ;Ga G
while ((j = k << 1) <= size) { hK!Z~
if (j < size %26amp;%26amp; queue[j] j++; 5yvaY "B
if (queue[k]>queue[j]) file://不用交换 %X)i-^T
break; "2>I?
SortUtil.swap(queue,j,k); <@BzF0
k = j; :ZP4(}
} 81\$X
} ep"YGx[V
private void fixUp(int k) { +%Vbz7+!
while (k > 1) { zeqP:goy
int j = k >> 1; u9WQ0.
if (queue[j]>queue[k]) E$$pO.\
break; kzA%.bP|
SortUtil.swap(queue,j,k); +]n.uA-`[a
k = j; &*G+-cF
} 89I[Dg;"u
} 2b+0}u>a
Nhh2P4gH
} oo{5:
F^5<o
} :!omog
_9Pxtf
SortUtil： aBPaC=g{HO
Vb|;@*=R&Q
package org.rut.util.algorithm; tK<GU.+
V\ud4
import org.rut.util.algorithm.support.BubbleSort; q!iMc
import org.rut.util.algorithm.support.HeapSort; Qm|Q0u
import org.rut.util.algorithm.support.ImprovedMergeSort; ;().
import org.rut.util.algorithm.support.ImprovedQuickSort; fvajNP
import org.rut.util.algorithm.support.InsertSort; :Zy7h7P,lT
import org.rut.util.algorithm.support.MergeSort; UcCkn7}
import org.rut.util.algorithm.support.QuickSort; 1vcI`8%S+u
import org.rut.util.algorithm.support.SelectionSort; \`w!v,aM$
import org.rut.util.algorithm.support.ShellSort; B/IPG~aMEZ
lO/<xSjNd
/** ={9G.%W
* @author treeroot K)2ZH@
* @since 2006-2-2 <B]\&
* @version 1.0 |Rr^K5hmD
*/ @`:n+r5u
public class SortUtil { Rn O%8Hk
public final static int INSERT = 1; gf]biE"k
public final static int BUBBLE = 2; |>(@n{
public final static int SELECTION = 3; <!.'"*2
public final static int SHELL = 4; iSTr;>A
public final static int QUICK = 5; 0G/VbS
public final static int IMPROVED_QUICK = 6; #C?T
public final static int MERGE = 7; P5;LM9W
public final static int IMPROVED_MERGE = 8; Cc:4n1|]>
public final static int HEAP = 9; QMI&?Q:=
W4yNET%l,
public static void sort(int[] data) { T`g.K6$b
sort(data, IMPROVED_QUICK); /#Y)nyE
} _A*5BAB:h(
private static String[] name={ ~mc7O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z`-?5-a]I
}; 4!Ez#\
\Q"o\:IoIT
private static Sort[] impl=new Sort[]{ \14"Bgj1
new InsertSort(), N> RabD
new BubbleSort(), i^9PiP|U
new SelectionSort(), 8tWOVLquJ
new ShellSort(), *F+t`<2
new QuickSort(), 66<3zadJZU
new ImprovedQuickSort(), %iWup:
new MergeSort(), RQI?\?o
new ImprovedMergeSort(), @psyO]D=j%
new HeapSort() R}F0_.
}; 0bxB@(NO
3X$)cZQ
public static String toString(int algorithm){ .$+]N[-=
return name[algorithm-1]; ZCi~4&Z#
} 8~?3: IZ
yc5C`r+6
public static void sort(int[] data, int algorithm) { "Mgx5d
impl[algorithm-1].sort(data); :mLcb.E
} C=ni5R
)/H=m7}1h
public static interface Sort { mLU4RQ}5
public void sort(int[] data); @cPb*
} f3e#.jan
((A]FOIbO
public static void swap(int[] data, int i, int j) { 8YC\Bw
int temp = data; >ir'v5
data = data[j]; M:|Z3p K
data[j] = temp; H8~<;6W
} J#B% #X
} {S(d5o8