[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; qrvsjYi*w
} @UBjq%z
int i1=l; K'iIJA*Sn
int i2=mid+1; m]_FQWfet
for(int cur=l;cur<=r;cur++){ a9zw)A
if(i1==mid+1) Ko&hj XHx
data[cur]=temp[i2++]; ultG36.x
else if(i2>r) m+{K^kr[
data[cur]=temp[i1++]; &AuF]VT
else if(temp[i1] data[cur]=temp[i1++]; ~m1P_`T
else DcIvhBp
data[cur]=temp[i2++]; "xMD,}+5$$
} SYeadsvF
} b5m=7;u*h
]`g<w#
} e}@)z3Q<l
M'`;{^<
改进后的归并排序: ; UiwH
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package org.rut.util.algorithm.support; h=kQ$`j6
t:JI!DR
import org.rut.util.algorithm.SortUtil; Et"?8\"n7
vvB(r!
/** /!}'t
* @author treeroot ~.PO[hC
* @since 2006-2-2 (3[z%@I
* @version 1.0 obK*rdg,
*/ ~Au,#7X)
public class ImprovedMergeSort implements SortUtil.Sort { I9o6k?$K
T{]~07N?
private static final int THRESHOLD = 10; r4x3$M c
!@u>A_
/* e&ANp0|W
* (non-Javadoc) !$A37j6
* Ae^X35
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oIGrA-T}
*/ V&soN:HS
public void sort(int[] data) { @4%L36k
int[] temp=new int[data.length]; 1%M&CX
mergeSort(data,temp,0,data.length-1); Q@e[5RA+]
} j4FeSGa
pqvOJ#?Q}=
private void mergeSort(int[] data, int[] temp, int l, int r) { Z') pf
int i, j, k; ?^' 7+8C*J
int mid = (l + r) / 2; 0.r4f'vk
if (l == r) %CZ-r"A
return; : FAH\
if ((mid - l) >= THRESHOLD) ?EMK8;
mergeSort(data, temp, l, mid); 2c<&eX8"
else o sbHs$C
insertSort(data, l, mid - l + 1); K\[!SXg@
if ((r - mid) > THRESHOLD) -]Cc
mergeSort(data, temp, mid + 1, r); qLncn}oNM
else SgMrce<;
insertSort(data, mid + 1, r - mid); 4vK8kkW1
Dz!fpE'L
for (i = l; i <= mid; i++) { kH*Pn'
temp = data; JXiZB 8}
} 3>zN/f
for (j = 1; j <= r - mid; j++) { D0Z\Vvy
temp[r - j + 1] = data[j + mid]; {"*VU3%q
} j^`X~gE
int a = temp[l]; ^IZ)#1U
int b = temp[r]; CZ2`H[8
for (i = l, j = r, k = l; k <= r; k++) { va/m~k|i
if (a < b) { W-RqN!snJ8
data[k] = temp[i++]; 2^~<("+w
a = temp; `Yc_5&"
} else { :&}odx!-!C
data[k] = temp[j--]; vv6$>SU
b = temp[j]; gOT+%Ab{_
} F}Mhs17!|
} @#+jMV$g
} *, Ld/O;s
.=9s1~]
/** 2.}R
* @param data #)+- lPe
* @param l $ E1Tb{'
* @param i pl*~kG=
*/ %kf>&b,Mi
private void insertSort(int[] data, int start, int len) { NW$H"}+o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G" b60RQ
} W:&R~R
} UIJx*
} /rB{[zk
} u%|zc=
Qx|H1_6
堆排序： r'/;O
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package org.rut.util.algorithm.support; ske@uzAz
:L?_Y/K
import org.rut.util.algorithm.SortUtil; {B$2"q/~
<>SdVif]
/** .W\ve>;
* @author treeroot +\`vq"e
* @since 2006-2-2 }6RT,O g
* @version 1.0 }m]q}r
*/ jX=lAs~6
public class HeapSort implements SortUtil.Sort{ /z."l!u6
\L!uHAE2a
/* (non-Javadoc) =?}twC$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iCG`3(xL
*/ suJ_nb
public void sort(int[] data) { 'aJgLws*w
MaxHeap h=new MaxHeap(); 4k}e28
h.init(data); cleOsj;S
for(int i=0;i h.remove(); hP?fMW$V
System.arraycopy(h.queue,1,data,0,data.length); s}x>J8hK
} c|p,/L09L
q1Qje%9@t
private static class MaxHeap{ S*W;%J5
0O@_cW
void init(int[] data){ y+mElG$F
this.queue=new int[data.length+1]; kka"C]!
for(int i=0;i queue[++size]=data; <zfe}0
fixUp(size); R zR?&J
} +`en{$%%
} wJ"ev.A)
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private int size=0; AMlV%U#
1IH[g*f
private int[] queue; </oY4$l'
_uH9XGm
public int get() { B:oF;~d/,
return queue[1]; I@7/jUO
} r((Tavn
_j#SpL'P
public void remove() { wvc>0?t'
SortUtil.swap(queue,1,size--); $N+6h#
fixDown(1); "X1vZwK8N
} *$,+`+
file://fixdown i s"vekC
private void fixDown(int k) { "ORzWnE4U
int j; W^g'}}]T
while ((j = k << 1) <= size) { Eek9|i"p
if (j < size %26amp;%26amp; queue[j] j++; ;_JH:}j
if (queue[k]>queue[j]) file://不用交换 n[k1np$7?6
break; :iCM=k
SortUtil.swap(queue,j,k); XF,<i1ZlM
k = j; )q^ Bj$
} P;91~``b-
} B!,yfTk]
private void fixUp(int k) { D&{ *AH%Q
while (k > 1) { b](o]O{v
int j = k >> 1; D!FaEN
if (queue[j]>queue[k]) 3{J.xWB@:
break; Dx+K+(
SortUtil.swap(queue,j,k); Ek .3
k = j; rg&+
} uDG+SdyN@
} )s")y
&sOM>^SAD
} av'*u
Wc'Ehyi;
} 9;f|EGwZ
:EHQ .^
SortUtil： ZlR!s!vv
Aka^e\Y@6*
package org.rut.util.algorithm; womq^h6
R_e)mkE
import org.rut.util.algorithm.support.BubbleSort; g()m/KS<
import org.rut.util.algorithm.support.HeapSort; >Q2). E
import org.rut.util.algorithm.support.ImprovedMergeSort; R{3CW^1
import org.rut.util.algorithm.support.ImprovedQuickSort; bEpMaBN
import org.rut.util.algorithm.support.InsertSort; J/Q|uRpmqr
import org.rut.util.algorithm.support.MergeSort; j7/(sf
import org.rut.util.algorithm.support.QuickSort; l]5%
import org.rut.util.algorithm.support.SelectionSort; |-kEGLH[*V
import org.rut.util.algorithm.support.ShellSort; jxY-u+B
b7$}JCn
/** m^tNqJs8
* @author treeroot 4;<DJ.XlN=
* @since 2006-2-2 h5onRa*7
* @version 1.0 pMN<p[MB
*/ UC!5 wVY
public class SortUtil { |~$7X
public final static int INSERT = 1; iHz[Zw^.s
public final static int BUBBLE = 2; hx!`F
public final static int SELECTION = 3; Nlt4)
public final static int SHELL = 4; YFx=b!/s
public final static int QUICK = 5; :XS"#^aJ
public final static int IMPROVED_QUICK = 6; Dd/}Ya(Gi
public final static int MERGE = 7; \Hum}0[
public final static int IMPROVED_MERGE = 8; lO2k<
public final static int HEAP = 9; zqGYOm$r
9~Xg#{
public static void sort(int[] data) { Fk$@Yy+}e
sort(data, IMPROVED_QUICK); Y><(?
} XiG88Kwv
private static String[] name={ <xF?~7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U42\.V0
}; 1g i}H)
q<XcOc5
private static Sort[] impl=new Sort[]{ 7Po/_%
new InsertSort(), s/S+ ec3
new BubbleSort(), L?f qcW{
new SelectionSort(), ;D&wh
new ShellSort(), M[,^KJ!
new QuickSort(), 6Bdyf(t
new ImprovedQuickSort(), b\L)m (
new MergeSort(), %HEmi;
new ImprovedMergeSort(), &7F&}7*c
new HeapSort() \X opU"
}; z(UX't (q
7.|S>+Q
public static String toString(int algorithm){ s5.k|!K
return name[algorithm-1]; XI g|G}i.
} h544dNo&
Kq6qXc\x
public static void sort(int[] data, int algorithm) { $K=z
impl[algorithm-1].sort(data); S ljZ~x,!
} mh8nlB
h.LSMU (O
public static interface Sort { B}5XRgq
public void sort(int[] data); 6SAQDE
} [NR1d-Wg
}2xb&6g~o
public static void swap(int[] data, int i, int j) { o}R|tOe
int temp = data; JOHp?3"4
data = data[j]; CU !.!cZ{
data[j] = temp; nP)-Y#`~7
} qq>44k\|)
} {q2<KRU2+#