[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; Tff7SEP
} hMhD(X
int i1=l; YM+}Mmu
int i2=mid+1; YN"102CK
for(int cur=l;cur<=r;cur++){ 2/?pI/W
if(i1==mid+1) -aKL 78
data[cur]=temp[i2++]; %aL>n=$
else if(i2>r) vAwFPqu
data[cur]=temp[i1++]; hiU_r="*ox
else if(temp[i1] data[cur]=temp[i1++]; Ldt7?Y(V(
else J6NQ5S\
data[cur]=temp[i2++]; >i@gR
} k 2;m"F
} A 7DdUNR
^/Gjk
} Mk,8v],-Tj
kDO6:sjR7
改进后的归并排序: fbo64$!hZ
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package org.rut.util.algorithm.support; :M|bw{P*
^b>E_u
import org.rut.util.algorithm.SortUtil; ,FS iE\
SuGlNp>#qm
/** A(;J
* @author treeroot d'Gv\i&e
* @since 2006-2-2 3<fJ5-z|-
* @version 1.0 [h8F)
*/ ~3f#cEP>d}
public class ImprovedMergeSort implements SortUtil.Sort { [>Q{70 c[
CdTmL{Y1
private static final int THRESHOLD = 10; `2r21rVntf
t$Irr*
/* B>a`mFM
* (non-Javadoc) ]~kqPw<R
* b39;Sv|#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #J^p,6
*/ D|9B1>A,m
public void sort(int[] data) { ub4(mS
int[] temp=new int[data.length]; Arfq
mergeSort(data,temp,0,data.length-1); _%i|*
} ufEt"P-X.
1T}|c;fc
private void mergeSort(int[] data, int[] temp, int l, int r) { +".&A#wU
int i, j, k; mn0QVkb}lc
int mid = (l + r) / 2; YhR?*Di
if (l == r) "NC(^\l/
return; FopD/D{
if ((mid - l) >= THRESHOLD) <w{W1*R9
mergeSort(data, temp, l, mid); '[\%P2c)Q
else *p.ELI1IC
insertSort(data, l, mid - l + 1); :*c@6;2@
if ((r - mid) > THRESHOLD) \O7,CxD2
mergeSort(data, temp, mid + 1, r); 2(`2f
else @J" }~Y
insertSort(data, mid + 1, r - mid); UxzwgVT
]e?*7T]
for (i = l; i <= mid; i++) { r OB\u|Pg
temp = data; /xsa-F
} #docBsHX&s
for (j = 1; j <= r - mid; j++) { Dq2eX;c@
temp[r - j + 1] = data[j + mid]; 1Rp|*>
} 6LvUi|~"<
int a = temp[l]; y=
int b = temp[r]; &Lq @af#
for (i = l, j = r, k = l; k <= r; k++) { O]{H2&k@
if (a < b) { X8;03EW;
data[k] = temp[i++]; unD8h=Z2
a = temp; o/=K:5
} else { $I1p"6
data[k] = temp[j--]; \?qXscq
b = temp[j]; |l)Oy#W
} TTy1a:V
} z$;%SYI
} lD C74g
w2$HP/90j
/** ?kS5=&<
* @param data hb? |fi
* @param l _MMz x2}
* @param i YT&_{nL#\
*/ $V5Ol6@2
private void insertSort(int[] data, int start, int len) { kN>d5q9b%X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7Jc=`Zm'
} zWjGGTP~3&
} 3_Oq4/
} WQ"ZQ
} +;;fw |/
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堆排序： DlIfr6F
CqrmdWN
package org.rut.util.algorithm.support; % qAhETZ%
_f34p:B%s
import org.rut.util.algorithm.SortUtil; !+fHdB
UI;!_C_
/** <w2Nh eM 3
* @author treeroot = b)q.2'#
* @since 2006-2-2 Pv0OoN*eJ{
* @version 1.0 |c >
*/ &BE[=& |
public class HeapSort implements SortUtil.Sort{ s|{K?s
w_|WberU
/* (non-Javadoc) iZ_R oJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V?Nl%M[b
*/ @d4zSG/s5w
public void sort(int[] data) { ao7|8[
MaxHeap h=new MaxHeap(); 162qxR[.
h.init(data); {nHy!{+qqG
for(int i=0;i h.remove(); );Gt!]p`;
System.arraycopy(h.queue,1,data,0,data.length); zlFl{t
} Bq:@ [pCQ
.!9]I'9M
private static class MaxHeap{ `yC R.3+
eJy@N
void init(int[] data){ 4>5%SzZT\3
this.queue=new int[data.length+1]; -,5g cD
for(int i=0;i queue[++size]=data; L<Lu;KnY6
fixUp(size); rxDule3m
} 0U$6TDtmE
} E176O[(V=
d3n TJX
private int size=0; gNZ^TeT
1p8E!c{}j
private int[] queue; %FF S&vd
5#2vSq!H
public int get() { 1/#N{rZ
return queue[1]; eY&UFe
} wbr"z7}
.3HC*E.e
public void remove() { PfuYT_p4s
SortUtil.swap(queue,1,size--); 0tsll1
fixDown(1); W}.4$f>
} _fa]2I
file://fixdown CZ&TUE|:DA
private void fixDown(int k) { h+$_:](PC
int j; %F}`;>C3
while ((j = k << 1) <= size) { ,:L}S03k
if (j < size %26amp;%26amp; queue[j] j++; N!Y'W)i16
if (queue[k]>queue[j]) file://不用交换 /pyKTZ|
break; FAQ:0L$G
SortUtil.swap(queue,j,k); ?T4%"0
k = j; [Cr_2
} YDQV,`S7
} /?_{DMt
private void fixUp(int k) { wT.V3G
while (k > 1) { X=.+XP]
int j = k >> 1; n*O/X
if (queue[j]>queue[k]) 7q67_u?@
break; c6lEWC:
SortUtil.swap(queue,j,k); kbMIMZC/G
k = j; gE$dz#t.
} g#70Sg*d
} 47icy-@kg
0kiW629o
} Rw. Uz&
L)w& f
} 2"i<--Y
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SortUtil： }RoM N$r
WQK#&r*
package org.rut.util.algorithm; ;^ /9sLW?#
x]{h$yI
import org.rut.util.algorithm.support.BubbleSort; ]gmf%g'C
import org.rut.util.algorithm.support.HeapSort; U}qW9X;o
import org.rut.util.algorithm.support.ImprovedMergeSort; iSsy_ |
import org.rut.util.algorithm.support.ImprovedQuickSort; 3cfkJ|fuwe
import org.rut.util.algorithm.support.InsertSort; O%+:fJz6wI
import org.rut.util.algorithm.support.MergeSort; m&$H?yXW>
import org.rut.util.algorithm.support.QuickSort; Z-vzq;
import org.rut.util.algorithm.support.SelectionSort; ,,G0}N@7s
import org.rut.util.algorithm.support.ShellSort; U2Ur N?T
}e@j(*8
/** M(2[X/t
* @author treeroot h+Z|s
* @since 2006-2-2 -6H)GK14b
* @version 1.0 JdV!m`XpXy
*/ z2dM*NMK
public class SortUtil { pCC0:
public final static int INSERT = 1; YTGup]d
public final static int BUBBLE = 2; cAiIbh>c
public final static int SELECTION = 3; bMv9f J
public final static int SHELL = 4; L4[bm[x
public final static int QUICK = 5; {{ wVM:1
public final static int IMPROVED_QUICK = 6; MK"Yt<e(o
public final static int MERGE = 7; |H@M-
public final static int IMPROVED_MERGE = 8; ~XZ1,2jA/
public final static int HEAP = 9; B\("08x
dj]sr!q+
public static void sort(int[] data) { Nf;vUYP
sort(data, IMPROVED_QUICK); TvQAy/Y0
} [&zP$i&
private static String[] name={ i"-#1vy=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VK NCK
}; .z{7 rH
EG1SIEo
private static Sort[] impl=new Sort[]{ g^]Q*EBa
new InsertSort(), UIu'x_qc
new BubbleSort(), klx4Mvq+/@
new SelectionSort(), "?N`9J|j)~
new ShellSort(), @lj
new QuickSort(), Cw+ (,1
new ImprovedQuickSort(), r^ "mPgY
new MergeSort(), yDyq. -Q
new ImprovedMergeSort(), nrf%/L
new HeapSort() .<j8>1
}; opIcSm&
pw$I~3OFd
public static String toString(int algorithm){ FF/MTd}6qG
return name[algorithm-1]; 6?KsH;L9
} {2q
F.\]Hqq
public static void sort(int[] data, int algorithm) { ++kiCoC
impl[algorithm-1].sort(data); oF*Y$OEu?c
} fqr}tvMr=T
cw^FOV*
public static interface Sort { 0<s)xaN>Y
public void sort(int[] data); [t6)M~&e:_
} wo_FM `@
a;h:o>Do5
public static void swap(int[] data, int i, int j) { sF|$oyDE
int temp = data; ^Krkf4fO
data = data[j]; pa\]@;P1
data[j] = temp; prm
} ^L'K?o
} -jyD!(