[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; IfpFsq:
} qj<_*
int i1=l; 8EAkM*D w
int i2=mid+1; Q);^gV
for(int cur=l;cur<=r;cur++){ Jtl[9qe#]
if(i1==mid+1) [ FNA:
data[cur]=temp[i2++]; LE@`TPg$R
else if(i2>r) Y?V>%eBu
data[cur]=temp[i1++]; WHvxBd
else if(temp[i1] data[cur]=temp[i1++]; >TwL&la
else ZH=oQV)6
data[cur]=temp[i2++]; )Tj\ym-Vl
} dS"%( ?o
} 'E~[I"0
Oz7WtN
} m'ykDK\B
uNG?`>4>
改进后的归并排序: L }&$5KiwV
%yP*Vp,W
package org.rut.util.algorithm.support; O)9{qU:[b
yf7$m_$C'
import org.rut.util.algorithm.SortUtil; K;#9: Z^+
8Qi@z Jq,
/** Mwd(?o
* @author treeroot \D,c*I|p7
* @since 2006-2-2 FT.;}!"l
* @version 1.0 tO]` I-
*/ 5<KY}
public class ImprovedMergeSort implements SortUtil.Sort { ,1&</R_
>s+*D=k
private static final int THRESHOLD = 10; 'hl4cHk14
=)9@rV&~
/* "1Oe bo2
* (non-Javadoc) U>s$}Y:+Z
* 5cE?>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p@+r&Mg%W"
*/ sy;_%,}N
public void sort(int[] data) { ]:vo"{*C
int[] temp=new int[data.length]; O6$d@r;EK]
mergeSort(data,temp,0,data.length-1); %wuD4PRK
} ]7yr.4?a
hIv8A_>@`
private void mergeSort(int[] data, int[] temp, int l, int r) { E/_I$<,_y
int i, j, k; O$,MdhyXC
int mid = (l + r) / 2; BNe6q[ )W~
if (l == r) KWH l+pL
return; mIX[HDy:V$
if ((mid - l) >= THRESHOLD) _]# ^2S
mergeSort(data, temp, l, mid); -r!sY+Z>
else K6l{wyMb|
insertSort(data, l, mid - l + 1); u+Q<>>lU
if ((r - mid) > THRESHOLD) `gFE/i18
mergeSort(data, temp, mid + 1, r); rW(<[2vg
else >l3iAy!sZ
insertSort(data, mid + 1, r - mid); pZg}7F{$
Gn8'h TM
for (i = l; i <= mid; i++) { mjtmN0^SR
temp = data; aX$Q}mgb
} ^E^Cj;od@
for (j = 1; j <= r - mid; j++) { gLL8-T[9
temp[r - j + 1] = data[j + mid]; 3/i_?G
} !ENDQ?1
int a = temp[l]; }[gk9uM_7
int b = temp[r]; ?' :v):J}
for (i = l, j = r, k = l; k <= r; k++) { 7}2Aq
if (a < b) { H]x-s
data[k] = temp[i++]; Dxlpo! ?#
a = temp; yxx'g+D*
} else { \6)]!$F6:
data[k] = temp[j--]; HDY2<Hzc
b = temp[j]; 6SGV}dAx
} ,p\:Z3{ZH
} 2`;&Uwt
} =W_Pph
Qmg2lP.)
/** %HAforH
* @param data zY=eeG+4s
* @param l &Q`{ Gk
* @param i +'VSD`BR
*/ tvlrUp
private void insertSort(int[] data, int start, int len) { 4{rqGC/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _P{f+HxU
} fZ5zsm'N
} ;LXwW(_6d
} 3Hd~mfO\
} P\lEfsuR
r&/M')}?Lw
堆排序： 'OTQiI^t=
TF1,7Qd
package org.rut.util.algorithm.support; :yi?<
(E{}iq@2
import org.rut.util.algorithm.SortUtil; g]Jt (aYK
pRys 5/&v
/** s ]XZQr%
* @author treeroot o^ zrF
* @since 2006-2-2 sW^e D;
* @version 1.0 tSVWO]<
*/ bpx ^
public class HeapSort implements SortUtil.Sort{ >_J9D?3S
@y!oKF
/* (non-Javadoc) 90[6PSXk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L}a-c(G+8
*/ -k8<LR3
public void sort(int[] data) { B{ Ab#
MaxHeap h=new MaxHeap(); T@%\?=P
h.init(data); YWFq&II|Z
for(int i=0;i h.remove(); -^aJ}[uaI
System.arraycopy(h.queue,1,data,0,data.length); \'Q rJ ?D
} D 0 O^=v|
g2;lEW
private static class MaxHeap{ &.l^>#
:;hz!6!
void init(int[] data){ lsaA
this.queue=new int[data.length+1]; ?Gl]O3@3
for(int i=0;i queue[++size]=data; bEKhU\@=J
fixUp(size); smUSR4VK
} XkPE%m_5D
} w7@TM%nS
)Yu
private int size=0; -|GKtZ]}
SF=TG84<
private int[] queue; M>_vsI^I'
AP:Q]A6}
public int get() { ;,}Dh/&E
return queue[1]; ]t0St~qUL)
} IIG9&F$G
yAiO._U
public void remove() { @ry/zG#
SortUtil.swap(queue,1,size--); a$j ~YUG_
fixDown(1); r~z'QG6v/
} rQxiG[0
file://fixdown Bd]k]v+
private void fixDown(int k) { zM,r0Z
int j; p|C[T]J\@
while ((j = k << 1) <= size) { oY4^CGk=
if (j < size %26amp;%26amp; queue[j] j++; ^TtL-|I
if (queue[k]>queue[j]) file://不用交换 5a-x$Qb9
break; f"*k>=ETI
SortUtil.swap(queue,j,k); rz0)S py6
k = j; `a%MD>R_Lg
} _i_P@I<M|~
} T]JmnCX>:
private void fixUp(int k) { s+?2oPa
while (k > 1) { w_f.\\1r
int j = k >> 1; UE{$hLI?g
if (queue[j]>queue[k]) Sx[ eX,q
break; q3<kr<SP
SortUtil.swap(queue,j,k); R RE8|%p;B
k = j; \BuyJskE
} _jc_(;KPF
} a'-u(Bw
W6Mq:?+D
} Wqkb1~]#Y
Q~tXT_
} ruQt0q,W3%
Cs_&BSs
SortUtil： {#:31)P
_1NK9dp:
package org.rut.util.algorithm; $&=xw _
7o0zny3?
import org.rut.util.algorithm.support.BubbleSort; \ )=WA!
import org.rut.util.algorithm.support.HeapSort; )S 7+y6f&*
import org.rut.util.algorithm.support.ImprovedMergeSort; 4EHrd;|
import org.rut.util.algorithm.support.ImprovedQuickSort; |mP};&b
import org.rut.util.algorithm.support.InsertSort; 3 3|t5Ia
import org.rut.util.algorithm.support.MergeSort; gfs;?vP
import org.rut.util.algorithm.support.QuickSort; s-_D,$ |
import org.rut.util.algorithm.support.SelectionSort; <:V~_j6P0
import org.rut.util.algorithm.support.ShellSort; +Q[uq!<VJk
D8<C7
/** WFiX=@SS
* @author treeroot *I)J%#
* @since 2006-2-2 VJ=>2'I
* @version 1.0 h7E~I J
*/ ~W[I
public class SortUtil { :{#O
public final static int INSERT = 1; ] \M+ju
public final static int BUBBLE = 2; T#H^ }`
public final static int SELECTION = 3; {$,\Qg
public final static int SHELL = 4; N(Ru/9!y"
public final static int QUICK = 5; >Jmla~A
public final static int IMPROVED_QUICK = 6; oX;.v9a
public final static int MERGE = 7; *m}8L%<HT
public final static int IMPROVED_MERGE = 8; +bS\iw+
public final static int HEAP = 9; U\p`YZ
a$"nNmD?
public static void sort(int[] data) { n&njSj/
sort(data, IMPROVED_QUICK); \y5lYb,*c_
} Ln4]uqMG.
private static String[] name={ K9lekevB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DxV=S0P
}; =3.dgtH
T@tsM|pI
private static Sort[] impl=new Sort[]{ F#gA2VCm
new InsertSort(), zak\%yY`
new BubbleSort(), I&{T 4.B:U
new SelectionSort(), 3'Y-~^ml|
new ShellSort(), 68XJ`/d
new QuickSort(), Lw}-oE !U
new ImprovedQuickSort(), k1<^Ept
new MergeSort(), oFj_o
new ImprovedMergeSort(), KClkPL!jP
new HeapSort() (dq_,LI
}; [UA*We 1
%):_
public static String toString(int algorithm){ )&@YRT\c?8
return name[algorithm-1]; YGJ!!(~r
} F qH))2
(oGYnN,2
public static void sort(int[] data, int algorithm) { 2y - QH
impl[algorithm-1].sort(data); 1'qXT{f/~
} ~HB#7+b
]E-/}Ysz
public static interface Sort { V: D;?$Jl
public void sort(int[] data); a9-Mc5^'n
} +]eG=. u
Uj7YTB
public static void swap(int[] data, int i, int j) { 0vqVE]C
int temp = data; DyN[Yp|V
data = data[j]; $|=|"/
data[j] = temp; w a_{\v=
} q[\3,Y
} |dgiW"tUm