[JAVA]用Java实现的各种排序

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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; BL16?&RK
} 4F#H$`:[
int i1=l; %(/E `
int i2=mid+1; -?)^ hbr
for(int cur=l;cur<=r;cur++){ +yWD>PY(
if(i1==mid+1) [_(J8~va
data[cur]=temp[i2++]; w>^(w<~Y
else if(i2>r) Nbd4>M<
data[cur]=temp[i1++]; y&,|+h
else if(temp[i1] data[cur]=temp[i1++]; 'lA}E
else oR2?$KF
data[cur]=temp[i2++]; {k_\1t(/
} `K.C>68
} '@.6Rd 8
xj>P5\mW#
} fe/;U=te
.b3h?R*&
改进后的归并排序: JVX)>2&$
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package org.rut.util.algorithm.support; )4=86>XJT
OA&'T*)-A6
import org.rut.util.algorithm.SortUtil; E.Xp\Dm71
M0fN[!*z
/** iv~R4;;)
* @author treeroot Nt@|l7Xl*
* @since 2006-2-2 Za{O9Qc?D|
* @version 1.0 /f1]U LmC:
*/ Q/4-7
public class ImprovedMergeSort implements SortUtil.Sort { 1Z< ^8L<
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private static final int THRESHOLD = 10; 72OqXa*
@Z ==B%`
/* 1Q(KZI
* (non-Javadoc) l2St)`K8
* Z&Ob,Ru
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1]Xx{j<
*/ IAH"vHM
public void sort(int[] data) { }S uj=oFp
int[] temp=new int[data.length]; 8j#S+=l>
mergeSort(data,temp,0,data.length-1); 1DB{"8ov
} V ,p~,rC
zX_F+"]THt
private void mergeSort(int[] data, int[] temp, int l, int r) { U*=E(l
int i, j, k; SPb+H19;
int mid = (l + r) / 2; 0* F` h
if (l == r) f X[xZGV,
return; 2~$S @c
if ((mid - l) >= THRESHOLD) ),p0V
mergeSort(data, temp, l, mid); M/p9 I gp
else @\y{q;
insertSort(data, l, mid - l + 1); R BHDfm'~7
if ((r - mid) > THRESHOLD) 'z"vk
mergeSort(data, temp, mid + 1, r); /Yy)=~t{
else a*5KUj6/TL
insertSort(data, mid + 1, r - mid); }9"''Z
)&1v[]%S
for (i = l; i <= mid; i++) { ^H.B6h?
temp = data; Fa>f'VXx
} #4bT8kq
for (j = 1; j <= r - mid; j++) { x8@ 4lxj
temp[r - j + 1] = data[j + mid]; + kKanm[!v
} n\((#<&
int a = temp[l]; v@%4i~N
int b = temp[r]; ~x,_A>a
for (i = l, j = r, k = l; k <= r; k++) { 6AJk6W^Z
if (a < b) { jlj ge=#c2
data[k] = temp[i++]; 66pjWS {X
a = temp; Pjs=n7
} else { (SRY(q
data[k] = temp[j--]; ~6i'V?>
b = temp[j]; g9" wX?*
} F9o7=5WAb
} / rc[HbNg.
} }dzdx"
@.-S(MNR
/** * |,N/e
* @param data ^yPZ$Q
* @param l c},pu[nL
* @param i 5FR#CQ
*/ x9Z89Gwi
private void insertSort(int[] data, int start, int len) { XZKlE F?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /Ot3[B
} @G2# Z
} 0vjCSU-X
} <rE>?zvm
} j$q5m 24L
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堆排序： I0zx'x)F
cZBXH*-M!
package org.rut.util.algorithm.support; kAEq+{h
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import org.rut.util.algorithm.SortUtil; 5=C?,1F$A
!Sn|!:N4
/** x\G%
* @author treeroot CO`)XB6W
* @since 2006-2-2 )7*'r@
* @version 1.0 cK1^jH<|
*/ $~6MR_Yq
public class HeapSort implements SortUtil.Sort{ g{DehBM
LXo$\~M8G8
/* (non-Javadoc) 9PKXQp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %FYhq:j
*/ 5\pS8<RJ;
public void sort(int[] data) { Xeq9Vs zg
MaxHeap h=new MaxHeap(); U}jGr=tu
h.init(data); .+1I>L
for(int i=0;i h.remove(); #sc!H4
System.arraycopy(h.queue,1,data,0,data.length); !*:g??[T
} ,7j8+p|},
G~5pMyOR
private static class MaxHeap{ |2l-s 1|y
-0CBMoe
void init(int[] data){ INr1bAe$
this.queue=new int[data.length+1]; teS>t!d
for(int i=0;i queue[++size]=data; "/6#Z>y
fixUp(size); 1k6asz^T
} Hq}g1?b
} /.0K#J:
mzK0$y#*o
private int size=0; D-/6RVq0m
;F258/J
private int[] queue; "BSY1?k{
#<)[{+f[t
public int get() { ht2Fie
return queue[1]; Cw(e7K7&
} 3tf_\E+mIi
^!S4?<v
public void remove() { ,pD sU@
SortUtil.swap(queue,1,size--); `'s_5Ek
fixDown(1); DYf2V6'
} F&6#j
file://fixdown bBs{PI2(p1
private void fixDown(int k) { <CVX[R]U
int j; Nx.9)MjI
while ((j = k << 1) <= size) { Nl YFS?5
if (j < size %26amp;%26amp; queue[j] j++; Z(6.e8fK
if (queue[k]>queue[j]) file://不用交换 0;TiNrzg
break; x4v:67_^
SortUtil.swap(queue,j,k); &)k=ccm
k = j; 4JK6<Pk
} nCi ]6;Y
} W5Z-s.o
private void fixUp(int k) { )r46I$]>
while (k > 1) { gg#9I(pX
int j = k >> 1; Ll=G+cw6P
if (queue[j]>queue[k]) W~mo*EJ'^
break; f)_<Ih\/7_
SortUtil.swap(queue,j,k); !d()'N
k = j; r:V bjmL
} L!xFhVA<
} Q(f0S
Dh`&B
} fSbLkd 9
j:cu;6|
} t/t6o&
#|E#Rkw!
SortUtil： 6ZIPe~`
01@WU1IN
package org.rut.util.algorithm; 5Yv*f:
D 1.59mHsD
import org.rut.util.algorithm.support.BubbleSort; Nmx\qJUR(
import org.rut.util.algorithm.support.HeapSort; ` 1+*-g^r
import org.rut.util.algorithm.support.ImprovedMergeSort; (m2%7f.I
import org.rut.util.algorithm.support.ImprovedQuickSort; Z~SAlhT
import org.rut.util.algorithm.support.InsertSort; "m^gCN}c
import org.rut.util.algorithm.support.MergeSort; qe&|6M!
import org.rut.util.algorithm.support.QuickSort; '|]}f}Go
import org.rut.util.algorithm.support.SelectionSort; M%_*vD
import org.rut.util.algorithm.support.ShellSort; !f(A9V
7kV$O(4
/** oA5Qk3b:
* @author treeroot a&G{3#l
* @since 2006-2-2 N>3{!K>/Y:
* @version 1.0 R7rM$|n=o
*/ _:\rB
public class SortUtil { Q(<A Yu
public final static int INSERT = 1; 'G65zz
public final static int BUBBLE = 2; sBZn0h@
public final static int SELECTION = 3; 2T*kmDp
public final static int SHELL = 4; "*#f^/LS
public final static int QUICK = 5; (KC08
public final static int IMPROVED_QUICK = 6; 2j4202
public final static int MERGE = 7; &PPnI(s^K
public final static int IMPROVED_MERGE = 8; EC$F|T0f
public final static int HEAP = 9; {Yxvb**
QswPga(-
public static void sort(int[] data) { je$H}D
sort(data, IMPROVED_QUICK); >A D!)&c
} e-`9-U%6
private static String[] name={ /{buFX2"}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yI8O#
}; 'E#L6,&
H 2I
private static Sort[] impl=new Sort[]{ x(u.(:V
new InsertSort(), -}TP)/!,*
new BubbleSort(), [cDDZ+6
new SelectionSort(), (zsmJe
new ShellSort(), 4}D&=0IZ
new QuickSort(), w;@v#<q6
new ImprovedQuickSort(), by9UwM=gp
new MergeSort(), J37vA zK%
new ImprovedMergeSort(), pm+E)z6Yo
new HeapSort() / P@P1l|I
}; Uot(3p!S6
qDGx(d
public static String toString(int algorithm){ NblPVxS
return name[algorithm-1]; uD{-a$6z
} ;PMPXN'z6
%62|dhl6
public static void sort(int[] data, int algorithm) { 2Ax(q&`9
impl[algorithm-1].sort(data); dKPXs-5
} "8a V~]~Dj
R{brf6,
public static interface Sort { I|*<[/)]y
public void sort(int[] data); Z]LP18m9kl
} /b{@']
#pRbRT9
public static void swap(int[] data, int i, int j) { "xC$Ko _
int temp = data; w\ '5lk,"
data = data[j]; M GC=L .
data[j] = temp; 9Q(Lnu
} zz3{+1w]
} SKf;Fe