[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; yIL6Sb
} z_^Vgb]
int i1=l; l$~3_3+
int i2=mid+1; eiV[y^?
for(int cur=l;cur<=r;cur++){ eI7FbOze
if(i1==mid+1) i0y^b5@MOb
data[cur]=temp[i2++]; V9 dRn2- [
else if(i2>r) M;\iL?,
data[cur]=temp[i1++]; qQu}4Ye>
else if(temp[i1] data[cur]=temp[i1++]; W h^9 Aq
else 5QjM,"`mp
data[cur]=temp[i2++]; ST#MCh-00
} + S^OzCGk
} (HW!!xM
c05kHB$O
} .BR2pf|R
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改进后的归并排序: ?W*{%my
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package org.rut.util.algorithm.support; +M"Fv9
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import org.rut.util.algorithm.SortUtil; em+dQ15
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/** s^@?+<4:
* @author treeroot I$Bu6x!
* @since 2006-2-2 w@&4dau
* @version 1.0 GxL;@%B
*/ R;wq
public class ImprovedMergeSort implements SortUtil.Sort { *oC],4y~D
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private static final int THRESHOLD = 10; f.%mp$~T
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/* LX [_6
* (non-Javadoc) \{HbL,s
* rff=ud>Jf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \pXs&}%1,F
*/ SM;*vkwz~
public void sort(int[] data) { i:6`Rmz1.
int[] temp=new int[data.length]; ]ZD W+<
mergeSort(data,temp,0,data.length-1); yM*-em
} vU:FDkx*nn
ADTx _tE
private void mergeSort(int[] data, int[] temp, int l, int r) { 7hs1S|
int i, j, k; J|9kWjOf+i
int mid = (l + r) / 2; X0\2qD
if (l == r) -bN;nSgb
return; OT*C7=
if ((mid - l) >= THRESHOLD) q`HuVilNH
mergeSort(data, temp, l, mid); _(K)(&
else Aj854 L(!
insertSort(data, l, mid - l + 1); JumZ>\'p(
if ((r - mid) > THRESHOLD) </UUvMf"
mergeSort(data, temp, mid + 1, r); E<j}"W$a
else p(jY2&g
insertSort(data, mid + 1, r - mid); /k$h2,O"*
F3-<F_4.w
for (i = l; i <= mid; i++) { \(ygdZ{R
temp = data; ?s=O6D&
} Vq'\`$_
for (j = 1; j <= r - mid; j++) { 5r*5Co+
temp[r - j + 1] = data[j + mid]; eI+<^p_j2
} 77FI&*q
int a = temp[l]; toq/G,N Q
int b = temp[r]; @H{QHi
for (i = l, j = r, k = l; k <= r; k++) { NUlp4i~Q
if (a < b) { D5o[z:V7"
data[k] = temp[i++]; S>-x<'Os
a = temp; Z*+0gJ<Y
} else { 64)Fz}
data[k] = temp[j--]; laRcEXj
b = temp[j]; #Tz$ona
} a.n;ika]-
} 7$;#-l
} uwQ~4
PQl^jS
/** lO (MF
* @param data U9<AL.
* @param l Fgx{ s%&-
* @param i .!fhy[%o:D
*/ :y/1Jf'2f
private void insertSort(int[] data, int start, int len) { eGwO!Lv}B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4LEWOWF}
} r8.`W\SKX
} ($Cy-p
} #%4XZ3j#j;
} "!V-@F$@N
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堆排序： jGg,)~)Y
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package org.rut.util.algorithm.support; ?QDHEC62
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import org.rut.util.algorithm.SortUtil; wbIgZ]o!/;
;PS V3Zh
/** v qt#JdPp9
* @author treeroot 'n:|D7t
* @since 2006-2-2 Vu0d\l^$
* @version 1.0 |/qwR~
*/ ?z hw0
public class HeapSort implements SortUtil.Sort{ ^(j}'p,
)8cb @N
/* (non-Javadoc) K nl`[Nl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T*Dd% f
*/ *~D|M
public void sort(int[] data) { HT`k-}ho,
MaxHeap h=new MaxHeap(); N)I9NM[
h.init(data); 6'{/Ote
for(int i=0;i h.remove(); D*%?0
System.arraycopy(h.queue,1,data,0,data.length); Q9yIQ{>H[
} IP LKOT~
syJLcK+e
private static class MaxHeap{ ?*)Q[P5
e(=() :4is
void init(int[] data){ D6$*#D3U
this.queue=new int[data.length+1]; t@&U2JaL>W
for(int i=0;i queue[++size]=data; /5!0wxN
fixUp(size); ]9 JLu8GO
} R)@2={fd}
} :F |ll?
xU1_L*tu '
private int size=0; |rgp(;iO
3s]aXz:
private int[] queue; <2n5|.:>
vGCvJ*4!
public int get() { 0P5s'2w
return queue[1]; )>=!</@
} oimM)Yo
F@tfbDO?
public void remove() { _xefFy
SortUtil.swap(queue,1,size--); 'mELW)S
fixDown(1); Hk1[0)
} n5DS
file://fixdown fN_qJm#:$y
private void fixDown(int k) { P=[_W;->}
int j; 7es<%H
while ((j = k << 1) <= size) { 6~!QibA|P
if (j < size %26amp;%26amp; queue[j] j++; hCOCX_
if (queue[k]>queue[j]) file://不用交换 iV$TvD+
break; `j1b5&N;7
SortUtil.swap(queue,j,k); 0"F|)
k = j; nO+-o;DbC
} |AQU\BUj
} `pYyr/
private void fixUp(int k) { Ki\\yK
while (k > 1) { j|KjQ'9
int j = k >> 1; 03/mB2|TF(
if (queue[j]>queue[k]) DFXHD,o
break; ELN1F0TneH
SortUtil.swap(queue,j,k); )n&6= Li
k = j; ;/h&40&
} 2dyS_2u
} '8yCwk
_UA|0a!-
} 4 Aj<k
i91 =h
} ~m'8<B5+
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SortUtil： &z]x\4#,
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package org.rut.util.algorithm; )H>?K0I
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import org.rut.util.algorithm.support.BubbleSort; @<jm+f"MP
import org.rut.util.algorithm.support.HeapSort; j"A<qI
import org.rut.util.algorithm.support.ImprovedMergeSort; .iC!Ttr
import org.rut.util.algorithm.support.ImprovedQuickSort; N/!(`Z,
import org.rut.util.algorithm.support.InsertSort; ]$,3vYBf
import org.rut.util.algorithm.support.MergeSort; oF~+L3&X
import org.rut.util.algorithm.support.QuickSort; :4r{t?ytXw
import org.rut.util.algorithm.support.SelectionSort; {pc (b
import org.rut.util.algorithm.support.ShellSort; 6lPuYEmT
I&6M{,rnM
/** r;9 V7C
* @author treeroot {4$aA*
* @since 2006-2-2 DDq?4
* @version 1.0 i-}Tt<^
*/ TILH[r&Jg
public class SortUtil { JvsL]yRT
public final static int INSERT = 1; D$AvD7_
public final static int BUBBLE = 2; 1u8hnG
public final static int SELECTION = 3; +MqJJuWB
public final static int SHELL = 4; Hz"FGwd
public final static int QUICK = 5; QHr'r/0
public final static int IMPROVED_QUICK = 6; 1l'JoU.<
public final static int MERGE = 7; tVe=c
public final static int IMPROVED_MERGE = 8; I.'/!11>
public final static int HEAP = 9; >WA'/Sl<A<
y=aWSb2y'
public static void sort(int[] data) { e*yl_iW
sort(data, IMPROVED_QUICK); FHSFH>
} t2iQ[`/?~
private static String[] name={ ~"\WV4}`v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?iZM.$![
}; l;rA}?,.^
^?2zoS#iw
private static Sort[] impl=new Sort[]{ !' 0PM[
new InsertSort(), [C/{ru&E
new BubbleSort(), gt9(5p
new SelectionSort(), ucJ}KMz
new ShellSort(), NM9,AG
new QuickSort(), ify48]
new ImprovedQuickSort(), }[=)sb_
new MergeSort(), 3B='f"G
new ImprovedMergeSort(), ))dw[Xa
new HeapSort() 1G6 \}El95
}; C+t0Zen
O')=]6CQ*
public static String toString(int algorithm){ h;#046-7
return name[algorithm-1]; 5UJ ?1"J
} I4|"Ztw
C23p1%#1
public static void sort(int[] data, int algorithm) { Vh1y]#w
impl[algorithm-1].sort(data); C}|.z
} %{7*o5`
P3IBi_YyG1
public static interface Sort { 6oq5CDoq
public void sort(int[] data); gj iFpW4
} ACy}w?D<
>9mj/P D
public static void swap(int[] data, int i, int j) { mK/E1a)AG3
int temp = data; ?lfyC/
data = data[j]; iDx(qdla
data[j] = temp; pN)x,<M)
} C4qK52'2s
} spTz}p^\O