[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; [6\b(kS+
} sL#MYW5E
int i1=l; ,:qk+
int i2=mid+1; {n(/ c33
for(int cur=l;cur<=r;cur++){ G BM8:IG \
if(i1==mid+1) IJDE{)
data[cur]=temp[i2++]; >LW}N!IBy
else if(i2>r) ~P'i /*:
data[cur]=temp[i1++]; qTe@?j
else if(temp[i1] data[cur]=temp[i1++]; f7&9IW`7F^
else =OFx4#6a
data[cur]=temp[i2++]; <sls1,
} 0CK3jdZ+X
} k\-h-0[|
HmbQL2
} $#E!/vVwD7
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改进后的归并排序: ipS:)4QFxJ
-[[(Zx
package org.rut.util.algorithm.support; zxeT{AFPr?
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import org.rut.util.algorithm.SortUtil; 5&0qr$
<,y> W!
/** es<
* @author treeroot Yw_!40`
* @since 2006-2-2 ZWQ/BgKB
* @version 1.0 E[<*Al+N
*/ l_Zx'm
public class ImprovedMergeSort implements SortUtil.Sort { ^ U~QQ
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private static final int THRESHOLD = 10; \t)`Cp6,[b
]AX3ov6z9;
/* \;JZt[
* (non-Javadoc) uc/W/c u,
* `yO'-(@"gY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BO.Db``
*/ q`UaJ_7
public void sort(int[] data) { 0e1-ZP CDj
int[] temp=new int[data.length]; ~EU\\;1Rmq
mergeSort(data,temp,0,data.length-1); WWATG=
} S q{@4F}d
tTWEhHQ`
private void mergeSort(int[] data, int[] temp, int l, int r) { *q+X?3
int i, j, k; "<LWz&e^^
int mid = (l + r) / 2; Zpz3?VM(
if (l == r) ilAhw4A
return; d0;?GQYn:
if ((mid - l) >= THRESHOLD) V)P8w#,
mergeSort(data, temp, l, mid); %< `D'V@
else 9dWz3b1[]
insertSort(data, l, mid - l + 1); `\f 3Ij,
if ((r - mid) > THRESHOLD) 'c# }^@G
mergeSort(data, temp, mid + 1, r); U>DCra;
else uF<?y0t
insertSort(data, mid + 1, r - mid); ~0@fK<C)O
AWJA?
for (i = l; i <= mid; i++) { KD?b|y@
temp = data; bP>Kx-%q
} tS-gaT`T
for (j = 1; j <= r - mid; j++) { 73Hm:"Eqd
temp[r - j + 1] = data[j + mid]; Fu5c_"!
} ,e$6%R
int a = temp[l]; kpxGC,I^*.
int b = temp[r]; '.k'*=cq0
for (i = l, j = r, k = l; k <= r; k++) { ^b.#4i(v
if (a < b) { 6[SIDOp*^
data[k] = temp[i++]; b`@J"E}
a = temp; 7VL|\^Y`q
} else { na"!"C s3
data[k] = temp[j--]; T"<)B^8f
b = temp[j]; 7Gy:T47T\@
} 'u~0rMe4})
} @0d"^
} |gIE$rt-~W
5{bc&?"
/** O8SE)R~
* @param data _ j`tR:
* @param l SZ}=~yoD(
* @param i eze%RjO}
*/ 2=/-,kOL_
private void insertSort(int[] data, int start, int len) { zTc*1(^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qj*.Z4ue
} xF@&wg
} I Zw
} :q?#$?
} e.~11bx
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堆排序： &} { #g
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package org.rut.util.algorithm.support; &BRa5`
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import org.rut.util.algorithm.SortUtil; !?=U{^|7y
_^NyLI%
/** ;lvcg)}l
* @author treeroot T6QRr}8`/J
* @since 2006-2-2 uxB`
* @version 1.0 MX8|;t
*/ @`dlhz
public class HeapSort implements SortUtil.Sort{ *@H\J e`
`G_~zt/
/* (non-Javadoc) :mW< E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bzxf*b1I
*/ I7~) q`
public void sort(int[] data) { ~f[ Y;
MaxHeap h=new MaxHeap(); k5Fj"U
h.init(data); igW* {)h3
for(int i=0;i h.remove(); -%@ah:iJ
System.arraycopy(h.queue,1,data,0,data.length); 5doi4b>]!
} {ywwJ
uYWD.]X;[
private static class MaxHeap{ (zsv!U
F"UI=7:o
void init(int[] data){ 6dV )pJd
this.queue=new int[data.length+1]; R TpNxr{[
for(int i=0;i queue[++size]=data; J=t}9.H~=
fixUp(size); 8-Y*b89
} XbB(<\0+
} iER@_?
tH44\~
private int size=0; >6HGh#0(p
;RRw-|/Wm
private int[] queue; zQG{j\
zX4RqI
public int get() { N+@ Ff3M
return queue[1]; 6-fv<Pn
} R$8{f:Pj
yDwh]t
public void remove() { WFh.oe8
SortUtil.swap(queue,1,size--); (D) KU9B>
fixDown(1); oJ\g0|\qwe
} _p*8ke
file://fixdown 6{Q-]LOc[.
private void fixDown(int k) { [&PF ;)i
int j; kM{8zpn
while ((j = k << 1) <= size) { >%om[]0E
if (j < size %26amp;%26amp; queue[j] j++; 8hD[z}
if (queue[k]>queue[j]) file://不用交换 e-`.Ht
break; #$x,PeG
SortUtil.swap(queue,j,k); S`U8\KTi
k = j; o3/o2[s
} #-<Go'yF
} 4&sf{tI
private void fixUp(int k) { ?'z/S5&j
while (k > 1) { CV.|~K0O
int j = k >> 1; &h5Y_no GX
if (queue[j]>queue[k]) fy4zBI@
break; ]i$y;]f
SortUtil.swap(queue,j,k); :sJ7Wok6~
k = j; YE~IO5
} ds9'k.
} N=KtW?C
XPO-u]<W
} 6]Hwr_/tk
45sEhs[$
} CqlxE/|
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SortUtil： 9hfg/3t('
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package org.rut.util.algorithm; "!V`_ S;
]s AuL!
import org.rut.util.algorithm.support.BubbleSort; c 'wRGMP
import org.rut.util.algorithm.support.HeapSort; jez0 A
import org.rut.util.algorithm.support.ImprovedMergeSort; zR?R,k)m
import org.rut.util.algorithm.support.ImprovedQuickSort; jRU:un4
import org.rut.util.algorithm.support.InsertSort; 6dR+qJa6i
import org.rut.util.algorithm.support.MergeSort; >5Yn`Fc5
import org.rut.util.algorithm.support.QuickSort; k`8O/J
import org.rut.util.algorithm.support.SelectionSort; t4_yp_
import org.rut.util.algorithm.support.ShellSort; ?J2A1iuq3
kt2_WW[
/** =JIceLL
* @author treeroot #0aBQ+_8H
* @since 2006-2-2 eTvWkpK+
* @version 1.0 ;+E]F8G9r
*/ "Zgwe,#
public class SortUtil { EGUlLqP6e
public final static int INSERT = 1; 7,+eG">0
public final static int BUBBLE = 2; x?{UWh%
public final static int SELECTION = 3; pqb'L]
public final static int SHELL = 4; IDH~nMz
public final static int QUICK = 5; 6I +0@,I
public final static int IMPROVED_QUICK = 6; ES&u*X:
public final static int MERGE = 7; 7qB4_
public final static int IMPROVED_MERGE = 8; (4cdkL
public final static int HEAP = 9; $lJcC |*
/=m AVA
public static void sort(int[] data) { (yqe4
sort(data, IMPROVED_QUICK); DJ,LQj
} i *.Y
private static String[] name={ z_$c_J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g2|Myz)
}; <J&S[`U!
,SR7DiYg
private static Sort[] impl=new Sort[]{ dgkS5Q$/
new InsertSort(), k56Qas+3=
new BubbleSort(), ?n`m
new SelectionSort(), ?[Lk]A&"L2
new ShellSort(), K>$f#^
new QuickSort(), !Zj]0,^
new ImprovedQuickSort(), pY"WW0p"C
new MergeSort(), ls^Z"9P
new ImprovedMergeSort(), `|ie#L(:7/
new HeapSort() <#C,66k
}; 9E2iZt]
1l$Ei,9
public static String toString(int algorithm){ ?IVJ#6[
return name[algorithm-1]; U"k$qZ[
} (4+P7Z,Nc
E{|B&6$[}
public static void sort(int[] data, int algorithm) { H`CID*Ji
impl[algorithm-1].sort(data); V%oZT>T3
} 0hemXvv1
90<g=B
public static interface Sort { {-\U)&6#v
public void sort(int[] data); MNd\)nX
} ."$t&[;s
~(^P(
public static void swap(int[] data, int i, int j) { 2IJK0w@
int temp = data; H{*Dc_
data = data[j]; :25LQf^nz
data[j] = temp; 7Bp7d/R-
} H#SQ>vyAV
} @(,1}3s