[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; 4uo`XJuQ
} dniU{v
int i1=l; :#pdyJQ_
int i2=mid+1; Iz5NA0[=2
for(int cur=l;cur<=r;cur++){ _BmObXOp.
if(i1==mid+1) Ph1XI&us9
data[cur]=temp[i2++]; X 3$ W60Q
else if(i2>r) > 'hM"4f
data[cur]=temp[i1++]; 6FQi=}O1
else if(temp[i1] data[cur]=temp[i1++]; 8.#{J&h
else iBd6&?E?<
data[cur]=temp[i2++]; %^pi
} m&Mupl
} +ti ?7|bK<
j 0pI
} b1.*cIv}
w_xca(
改进后的归并排序: DzQBWY] )
/N"3kK,N
package org.rut.util.algorithm.support; =d<RgwscJ
q.VYPkEib
import org.rut.util.algorithm.SortUtil; (Z SaAn),
IB/3=4n^|
/** *iEtXv
* @author treeroot a+E&{pV
* @since 2006-2-2 Ve3z5d:^
* @version 1.0 UtQey ;w
*/ >F7w]XH
public class ImprovedMergeSort implements SortUtil.Sort { >sfg`4
e~9O#rQI
private static final int THRESHOLD = 10; BVNW1<_:
V@G#U[D
/* X,7y|tb
* (non-Javadoc) b}3"v(
* e "A"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yZ|"qP1
*/ .h7s.p?
public void sort(int[] data) { o)AwM"
int[] temp=new int[data.length]; s|]g@czan
mergeSort(data,temp,0,data.length-1); DAB9-[y+
} K>@yk9)vi
sQvRupYRO
private void mergeSort(int[] data, int[] temp, int l, int r) { ] 3"t]U'f
int i, j, k; c+9L6}D
int mid = (l + r) / 2; 2}r=DAe0
if (l == r) "6$V1B0KW
return; MC}t8L=
if ((mid - l) >= THRESHOLD) @1JwjtNk
mergeSort(data, temp, l, mid); hj [77EEz
else <U@N^#
insertSort(data, l, mid - l + 1); l@4_D;b3o"
if ((r - mid) > THRESHOLD) udZOg
mergeSort(data, temp, mid + 1, r); ;Y$>WKsV
else &12KpEyf
insertSort(data, mid + 1, r - mid); _\ToA9m
sjr,)|#[
for (i = l; i <= mid; i++) { ;uUFgDi
temp = data; :8A+2ra&
} Ey&H?OFiP
for (j = 1; j <= r - mid; j++) { elOeXYO0
temp[r - j + 1] = data[j + mid]; G%<}TI1}
} Nr~$i%[
int a = temp[l]; W)In.?>]W
int b = temp[r]; $;qi-K3j
for (i = l, j = r, k = l; k <= r; k++) { 7K1-.uQ
if (a < b) { mL{P4a 1xf
data[k] = temp[i++]; `Y#At3{
a = temp; 5Q?Jm~H9
} else { z8Q!~NN-K
data[k] = temp[j--]; *qd:f!Q3
b = temp[j]; <'a~Y3B"o
} 0 &zp
} Ts5)r(
} XA>W>|
&S,D;uhF
/** =ejj@c
* @param data K,E/.Qe\C
* @param l A`c%p7Z%
* @param i Ps!MpdcL3
*/ { mi}3/
private void insertSort(int[] data, int start, int len) { SB_Tzp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {PHH1dC{
} "|SMRc
} 2/LSB8n|
} ?"6Zf LRi
} ,N.8
wVs?E
堆排序： 2ym(fk.6{
) 7/Cg
package org.rut.util.algorithm.support; PsY![CPrW
T*z]<0E]
import org.rut.util.algorithm.SortUtil; Xwm3# o.&)
l!mbpFt
/** Z'z)Oo
* @author treeroot rbw$=bX}
* @since 2006-2-2 ToXWFX
* @version 1.0 `fu_){
*/ @I_cwUO
public class HeapSort implements SortUtil.Sort{ I{Zb/}k-
RLmOg{L
/* (non-Javadoc) WE<?y_0y&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y+k_&ss
*/ !#tVQ2O
public void sort(int[] data) { &`"DG$N(
MaxHeap h=new MaxHeap(); $*yYmF
h.init(data); diq}\'f
for(int i=0;i h.remove(); D'" T'@
System.arraycopy(h.queue,1,data,0,data.length); BuJo W@)
} $ V^gFes
p@m0Oi,=
private static class MaxHeap{ z:Ml;y
bz4Gzp'6k
void init(int[] data){ 1Ms[$$b$
this.queue=new int[data.length+1]; *LT~:Gs#
for(int i=0;i queue[++size]=data; _5oTNL2
fixUp(size); F^i3e31*t
} d+9V% T
} ]ss[n.T0*
zA,vp^
private int size=0; CWj_K2=d
Av X1*
private int[] queue; N'Gq9A
XHr*Rs.[=
public int get() { <Vat@e
return queue[1]; Wh[QR-7Ew
} [BWq9uE
54 lD+%E
public void remove() { ]%\,.&=hT
SortUtil.swap(queue,1,size--); `KJ(.m
fixDown(1); SQp|
} ( xs'D4
file://fixdown VF%QM;I[Rc
private void fixDown(int k) { !ifU}qFzK
int j; DeO-@4+qKd
while ((j = k << 1) <= size) { FXQWT9Kk~_
if (j < size %26amp;%26amp; queue[j] j++; P}bIp+
if (queue[k]>queue[j]) file://不用交换 LCF}Y{
break; j]u!;]
SortUtil.swap(queue,j,k); =C"[o\]VV
k = j; q6 CrUn
} !b8V&<
} ewDYu=`*
private void fixUp(int k) { -^_m(@A<~
while (k > 1) { "F F$Q#)
int j = k >> 1; _jWs(OmJ
if (queue[j]>queue[k]) `MtzA^Xr
break; 8fC4j`!
SortUtil.swap(queue,j,k); OgQdyU
k = j; ]?9*Vr:P^
} e~r/!B5X
} XJ18(Q|w'
K$"#SZEi
} UhxM85M;x
MK&,2>m,A
} c4JV~VS+
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SortUtil： j3j?2#vR
]l,BUf-O
package org.rut.util.algorithm; vygzL U^
' \JE>#
import org.rut.util.algorithm.support.BubbleSort; ]#tB[G
import org.rut.util.algorithm.support.HeapSort; !3Q0Ahf
import org.rut.util.algorithm.support.ImprovedMergeSort; Y.^L^ "%dF
import org.rut.util.algorithm.support.ImprovedQuickSort; p|>*M\LE#
import org.rut.util.algorithm.support.InsertSort; +8Xjk\Hi
import org.rut.util.algorithm.support.MergeSort; I!x.bp~V!
import org.rut.util.algorithm.support.QuickSort; u4x-GObJM
import org.rut.util.algorithm.support.SelectionSort; L2}\Ah"[
import org.rut.util.algorithm.support.ShellSort; /6x&%G:m#
8 Rx@_
/** ]\,?u /
* @author treeroot ["-rDyP
* @since 2006-2-2 {)YbksrJ{
* @version 1.0 @rl5k(
*/ r- 8Awa
public class SortUtil { ^y+k6bE
public final static int INSERT = 1; Z,&O8Jelf
public final static int BUBBLE = 2; |OeyPD#
public final static int SELECTION = 3; _v!7 |&\
public final static int SHELL = 4; :F(4&e=w
public final static int QUICK = 5; lqDCK&g$E#
public final static int IMPROVED_QUICK = 6; cslC+e/
public final static int MERGE = 7; Tz @<hE
public final static int IMPROVED_MERGE = 8; ``MO5${
public final static int HEAP = 9; K'A+V
lriezI
public static void sort(int[] data) { |9*Rnm_
sort(data, IMPROVED_QUICK); ~7m`p3W@
} ?<?Ogq"<
private static String[] name={ XlppA3JON|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g~lv/.CnA+
}; "?" :
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private static Sort[] impl=new Sort[]{ hkK>h
new InsertSort(), ddn IKkOp
new BubbleSort(), 'gwh:
new SelectionSort(), T:^.; ZY
new ShellSort(), ak(s@@k
new QuickSort(), -(vHy/Hz.
new ImprovedQuickSort(), _@5Xmr
new MergeSort(), _3/u#'m0
new ImprovedMergeSort(), L&\W+k
new HeapSort() ]U?nYppV
}; }$ y.qqG
G[64qhTC
public static String toString(int algorithm){ ,@*5x'auK
return name[algorithm-1]; rH}|~
} $LP(\T([
_i=*0Q
public static void sort(int[] data, int algorithm) { eI8o#4nT
impl[algorithm-1].sort(data); * #yF`_p
} hf`y_H+\7
WowKq0sn
public static interface Sort { `M@ESA(e
public void sort(int[] data); p=+Y7NE)
} xP8/1wd.
0h-NT\m
public static void swap(int[] data, int i, int j) { gtKih
int temp = data; O,$*`RZpx
data = data[j]; fB2ILRc
data[j] = temp; ak7%
} " ityx?
} l\_!oa~