[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; EgTFwEj
} "8N"Udu
int i1=l; M[, D *
int i2=mid+1; P|e`^Frxt
for(int cur=l;cur<=r;cur++){ ^=EjadVQ
if(i1==mid+1) 'p%=<0vrr
data[cur]=temp[i2++]; ZJ;LD*
else if(i2>r) *'D=1{WZ!
data[cur]=temp[i1++]; z[fB!O
else if(temp[i1] data[cur]=temp[i1++]; lT.zNhz:d9
else 2fJ{LC
data[cur]=temp[i2++]; v:KX9A.
} b'i'GJBQ+$
} .~3kGf":
)QmGsU}?
} gQ37>
b"``D ?
改进后的归并排序: 9tn;L"#&N
JqEW=5
package org.rut.util.algorithm.support; -G9|n#zCU
C.~j'5N
import org.rut.util.algorithm.SortUtil; n`q2s'Pc
@mf({Q>
/** s5l3V2k
* @author treeroot oid[syPB
* @since 2006-2-2 $;2)s}ci
* @version 1.0 o(*F])d;
*/ "O*x' XhN
public class ImprovedMergeSort implements SortUtil.Sort { |; $Bb866/
fN-Gk(Ic
private static final int THRESHOLD = 10; #^6^
e+'%!w"B
/* MIq"Wy|Zs
* (non-Javadoc) 3HZ~.
* J~KX|QY.S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8eluO ?p
*/ G"T\=cQz
public void sort(int[] data) { uWjN2#&,
int[] temp=new int[data.length]; fc@'9-pt
mergeSort(data,temp,0,data.length-1); G?`-]FMO
} ;+ azeW^
5 L/x-i
private void mergeSort(int[] data, int[] temp, int l, int r) { $5AC1g'
int i, j, k; c%z'xM
int mid = (l + r) / 2; 8d!GZgC8R
if (l == r) Qzqc .T
return; a+`D'?z
if ((mid - l) >= THRESHOLD) PWH^=K
mergeSort(data, temp, l, mid); =E(#YCx
else Z) Wnow
insertSort(data, l, mid - l + 1); `0bP0^w
if ((r - mid) > THRESHOLD) mN*?%t
mergeSort(data, temp, mid + 1, r); ;I}'}
else tdep|sD
insertSort(data, mid + 1, r - mid); A%u_&a}
A`[@8
for (i = l; i <= mid; i++) { 7(bQ}mHl\
temp = data; K R,z^9
} +r]zs^'
for (j = 1; j <= r - mid; j++) { {tw+#}T a
temp[r - j + 1] = data[j + mid]; \'Ssn(s
} wN97_Y=`n
int a = temp[l]; %{!R l@
int b = temp[r]; C&+6>L@
for (i = l, j = r, k = l; k <= r; k++) { Fv8f+)k)Z~
if (a < b) { LY 0]l$
data[k] = temp[i++]; Y9Z]i$qS&k
a = temp; Z^yNLF*&V
} else { " .4,."
data[k] = temp[j--]; m^V5*JIh
b = temp[j]; _V2xA88
} |A\a4f'G
} 0 Y>M=|
} -fy9<
B4h5[fPX
/** >|g?wC}V;
* @param data :z&7W<
* @param l 8|@9{
* @param i fBhoGA{=g
*/ !m;H@KR{
private void insertSort(int[] data, int start, int len) { ml6u1+v5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D:"{g|nW}
} 8`=v.
} -TO\'^][X
} ;=4Xz\2
} /mA,F;
cA)[XpQ:+W
堆排序： GbI-SbE
d\]Yk]r
package org.rut.util.algorithm.support; ]p7jhd=
)5_jmW`n
import org.rut.util.algorithm.SortUtil; 7fHc[,
s58C2
/** Y}s@WJ
* @author treeroot E&`Nh5JfC
* @since 2006-2-2 /,@p\Ae5
* @version 1.0 gNYqAUG5
*/ bD^b
public class HeapSort implements SortUtil.Sort{ +Q$h ]^>~
-=`#fDvBn
/* (non-Javadoc) #]P9b@@e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (wRgus
*/ !-<p,z
public void sort(int[] data) { |`TgX@,#9
MaxHeap h=new MaxHeap(); w[tmCn+
h.init(data); iOAbaPN
for(int i=0;i h.remove(); nKa$1RMO
System.arraycopy(h.queue,1,data,0,data.length); ^D%FX!$
} i4JqT\q
UT0){%2@
private static class MaxHeap{ >P6BW
oVFnlA
void init(int[] data){ w| `h[/,
this.queue=new int[data.length+1]; ,R%q}IH#
for(int i=0;i queue[++size]=data; wX >*H
fixUp(size); Ar*^;/
} tW WWx~k
} h2ytS^
v~QHMg
private int size=0; *Kdda} J+
(e(:P~Ry
private int[] queue; !?c|XdjZ
4=<tWa|@9
public int get() { .X# `k
return queue[1]; y@0E[/O
} Pj}66.
okbQ<{9
public void remove() { rj(T~d4
SortUtil.swap(queue,1,size--); C74a(Bk}H
fixDown(1); a~'a
} 9$2/MT't
file://fixdown 'yMF~r3J
private void fixDown(int k) { d3=KTTi\
int j; 0$,SF3K
while ((j = k << 1) <= size) { (sh)TBb5
if (j < size %26amp;%26amp; queue[j] j++; H\TI[JPAl
if (queue[k]>queue[j]) file://不用交换 /!c${W!sY
break; (Jz1vEEV
SortUtil.swap(queue,j,k); Y "/]|'p
k = j; >0"+4<72
} rqY`8Ry2M
} '&\kxNglJ
private void fixUp(int k) { Hy^N!rBxfO
while (k > 1) { B)0i:"q
int j = k >> 1; %}%Qc6.H
if (queue[j]>queue[k]) 'FDef#P<
break; G K7![p
SortUtil.swap(queue,j,k); )e6)~3[^
k = j; AQR/nWwx
} yWkg4
} M+ljg&fy
f 3t&Bcw$
} "PhP1;A9,
xfsf
} kH9P(`;Vq
"pLWJvj6-
SortUtil： )*tV
WD${f#]N
package org.rut.util.algorithm; hNWZ1r~_
?r"QJa>
import org.rut.util.algorithm.support.BubbleSort; Okt0b|=`1*
import org.rut.util.algorithm.support.HeapSort; }_vUsjK
import org.rut.util.algorithm.support.ImprovedMergeSort; 5q Y+^jO]o
import org.rut.util.algorithm.support.ImprovedQuickSort; !\RBOdw C
import org.rut.util.algorithm.support.InsertSort; z&x3":@u<
import org.rut.util.algorithm.support.MergeSort; I&lb5'6D
import org.rut.util.algorithm.support.QuickSort; ^w1&A3=6
import org.rut.util.algorithm.support.SelectionSort; `of`uB
import org.rut.util.algorithm.support.ShellSort; 5:W5@e{
`N.^+Mvx-
/** I C?bqC+
* @author treeroot Fu;\t 0
* @since 2006-2-2 7%g8&d
* @version 1.0 B>=NE.ulUL
*/ ~EJ+<[/
public class SortUtil { We51s^(
public final static int INSERT = 1; h|Z%b_a
public final static int BUBBLE = 2; /%4wm?(eA
public final static int SELECTION = 3; o:x,zfW
public final static int SHELL = 4; Z'F=Xw6;b
public final static int QUICK = 5; $22_>OsA
public final static int IMPROVED_QUICK = 6; +^0Q~>=VD
public final static int MERGE = 7; TcjTF|q>
public final static int IMPROVED_MERGE = 8; piv/QP-X
public final static int HEAP = 9; `$hna{e^n
GiH<6<=
public static void sort(int[] data) { F )|0U~
sort(data, IMPROVED_QUICK); P_{jZ}y(
} Nu]&?
private static String[] name={ X_tc\}I]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F!yr};@^p
}; _${//`ia=
hnf7Q l}
private static Sort[] impl=new Sort[]{ 4x;vn8yh
new InsertSort(), 9]E;en NQ
new BubbleSort(), d \[cFe1d
new SelectionSort(), /j|Rz5@=
new ShellSort(), fP:26pK^
new QuickSort(), h'D-e5i
new ImprovedQuickSort(), (}jYi*B
new MergeSort(), ,dZ&i!@?
new ImprovedMergeSort(), S="teH[
new HeapSort() Vy6A]U\%
}; 1>wQ&{
g~#HiBgWq[
public static String toString(int algorithm){ ZM$}Xy\9
return name[algorithm-1]; FR%u1fi
} PRo;NE
sb^%eUU])
public static void sort(int[] data, int algorithm) { N%:)MT,&g
impl[algorithm-1].sort(data); U!xOJ
} nS`DI92I
y;1 'hP&
public static interface Sort { s'Op|`&X
public void sort(int[] data); ]`S35b
} %8N=4vTJ
_Vj uQ
public static void swap(int[] data, int i, int j) { Ait3KIJ9
int temp = data; pl.D h
data = data[j]; cI g|sn
data[j] = temp; q)Uh_l.Cj
} gOnVN6
} @jvF[wi;