[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; `6pz9j]
} K,Hxe;-
int i1=l; ,gIeQ!+vy
int i2=mid+1; lYy:A%yDT
for(int cur=l;cur<=r;cur++){ @[j%V ynf
if(i1==mid+1) L.%zs
data[cur]=temp[i2++]; -;GB Xq
else if(i2>r) 8n/[oDc]
data[cur]=temp[i1++]; 5$/Me=g<
else if(temp[i1] data[cur]=temp[i1++]; 6\6g-1B`
else 7E R!>l+
data[cur]=temp[i2++]; %m "9 =C
} q`HK4~i,
} t[\6/`YH
h`Xl~=
} JgcMk]|'
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改进后的归并排序: j/hm)*\io
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package org.rut.util.algorithm.support; /!W',9ua6
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import org.rut.util.algorithm.SortUtil; Ss'Dto35Q
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/** HUx-8<ws
* @author treeroot 6V-JyTcxGI
* @since 2006-2-2 &[$t%:`
* @version 1.0 W(PNw2
*/ @gm!D`YL
public class ImprovedMergeSort implements SortUtil.Sort { Gvquv\
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private static final int THRESHOLD = 10; ]9hhAT44
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/* K]ds2Kp&
* (non-Javadoc) b`|,rfq^AZ
* #6nuiSF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VQn]"G(`
*/ _sF Ad`
public void sort(int[] data) { /mnV$+BE
int[] temp=new int[data.length]; pYX!l:hk
mergeSort(data,temp,0,data.length-1); h~k+!\
} =_`cY^ib+
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private void mergeSort(int[] data, int[] temp, int l, int r) { O @{<?[
int i, j, k; S|T*-?|
int mid = (l + r) / 2; Lg+cHaA
if (l == r) >!#or- C
return; Ej'N!d.
if ((mid - l) >= THRESHOLD) R3E|seR
mergeSort(data, temp, l, mid); 10r9sR
else $H1igYc
insertSort(data, l, mid - l + 1); 1K[y)q
if ((r - mid) > THRESHOLD) -7A2@g
mergeSort(data, temp, mid + 1, r); laaoIL^
else &u~%5;
insertSort(data, mid + 1, r - mid); -_BjzA|
n;~6'fxe
for (i = l; i <= mid; i++) { ~{[,0,lWU
temp = data; :bz;_DZP
} BzI(
for (j = 1; j <= r - mid; j++) { A7TV-eWG
temp[r - j + 1] = data[j + mid]; %(g!,!l)
} zCSLV>.F
int a = temp[l]; @;>Xy!G
int b = temp[r]; 5>~q4t)6z}
for (i = l, j = r, k = l; k <= r; k++) { >;k~B
if (a < b) { q #X[oVq
data[k] = temp[i++]; |}<!O@<|
a = temp; n)R[T.E)+
} else { HkyN$1s
data[k] = temp[j--]; P@Av/r
b = temp[j]; ` NWmwmWB"
} 2yndna-
} $ZnVs@:S
} G/V0Yn""
| @p
/** pe-%`1iC0>
* @param data XI;F=r}'
* @param l :47"c3J
* @param i O\^D 6\ v
*/ x!A5j $k0
private void insertSort(int[] data, int start, int len) { E# *`u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #,rP1#?
} !9EbG
} PpR eqmo
} );fPir?+
} Hu$JCB-%
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堆排序： BmCBC,j<v>
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package org.rut.util.algorithm.support; 5S&^mj-9
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import org.rut.util.algorithm.SortUtil; k:CSH{s5{
SW=%>XKkh
/** kI/%|L%6D
* @author treeroot FO?I}G22
* @since 2006-2-2 <u2iXH5w
* @version 1.0 ph@2[rUp
*/ 5z9'~Gfb
public class HeapSort implements SortUtil.Sort{ $kn"S>jV
l6HT}x7OiH
/* (non-Javadoc) 09Y:(2Qri
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P:c'W?
*/ @v n%
public void sort(int[] data) { i|G /x
MaxHeap h=new MaxHeap(); >I9|N}I
h.init(data); q%wF=<W
for(int i=0;i h.remove(); z. xRJ
System.arraycopy(h.queue,1,data,0,data.length); 1DM$FG_Z-
} ^%Fn|U\u
7dXh,sD
private static class MaxHeap{ zM<yd#`yt8
n_-k <3
void init(int[] data){ Y~I6ee,\
this.queue=new int[data.length+1]; =8x-+u5}rK
for(int i=0;i queue[++size]=data; P%Wl`NA P
fixUp(size); t}Kzh`
} h]?[}&
} ((tWgSZ3
"gq_^&
private int size=0; L&qY709
T2i\S9X
private int[] queue; [`=:uUf3
2%t!3F:
public int get() { vmT6^G
return queue[1]; 2Jn?'76`
} a|@1RH>7H
LrnE6U9
public void remove() { D}EH9d
SortUtil.swap(queue,1,size--); \t]aBT,
fixDown(1); JL&ni]m
} 'pl){aL`@u
file://fixdown 4t0-L]v4.*
private void fixDown(int k) { j0IuuJ+
int j; !6{b)P
while ((j = k << 1) <= size) { B~/ejC!
if (j < size %26amp;%26amp; queue[j] j++; U%_6'5s{^
if (queue[k]>queue[j]) file://不用交换 PoRL35
break; M@O<b-
SortUtil.swap(queue,j,k); u3_AZ2-;
k = j; \|Ya*8V
} =!PUKa3f<
} 5b%zpx0Y
private void fixUp(int k) { 9Q*zf@w
while (k > 1) { \}NZ]l
int j = k >> 1; R,[+9U|4V
if (queue[j]>queue[k]) yy$7{9!
break; ekO*(vQ~
SortUtil.swap(queue,j,k); Ix'GP7-m_
k = j; }J\KnaKo
} LQ=Fck~[r
} i+Btz-
!FJ_\UST0
} Q4&<RWbT^
^W<uc :L7
} |Xa|%f
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SortUtil： b. oA}XP
9A1w5|X
package org.rut.util.algorithm; O,!4 W\s
AC/82$
import org.rut.util.algorithm.support.BubbleSort; 2[$` ]{U
import org.rut.util.algorithm.support.HeapSort; <t4l5nr#
import org.rut.util.algorithm.support.ImprovedMergeSort; Wy,Tf*[
import org.rut.util.algorithm.support.ImprovedQuickSort; ?u /i8
import org.rut.util.algorithm.support.InsertSort; Ue]GHJ2
import org.rut.util.algorithm.support.MergeSort; f=*xdOB3
import org.rut.util.algorithm.support.QuickSort; h5R5FzY0&
import org.rut.util.algorithm.support.SelectionSort; NI% ()
import org.rut.util.algorithm.support.ShellSort; @awN*mO
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/** OL)M`eVQ'
* @author treeroot p(Bn!
* @since 2006-2-2 |p{FSS
* @version 1.0 ?$FvE4!n
*/ 'Z(4Wuwb
public class SortUtil { =8)q-{p3
public final static int INSERT = 1; <y5f[HjLy
public final static int BUBBLE = 2; B|+tK
public final static int SELECTION = 3; S)d_A
public final static int SHELL = 4; Z]Iyj 97
public final static int QUICK = 5; Gn%gSH/
public final static int IMPROVED_QUICK = 6; [sH[bmLR
public final static int MERGE = 7; za@`,Yq
public final static int IMPROVED_MERGE = 8; {BKr/) H
public final static int HEAP = 9; H&zhYKw
SvR? nN|
public static void sort(int[] data) { a uz2n
sort(data, IMPROVED_QUICK); 1u0NG)*f
} ,zY!EHpx
private static String[] name={ u6(>?r-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &MsBcP[
}; SZQ4e
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private static Sort[] impl=new Sort[]{ )q+9_KUq
new InsertSort(), xkzC+ _A
new BubbleSort(), bbO1`b-
new SelectionSort(), N/fH%AtM
new ShellSort(), |k^ *
new QuickSort(), 4?{e?5)
new ImprovedQuickSort(), "|l-NUe
new MergeSort(), ,:QDl
new ImprovedMergeSort(), BnLWC
new HeapSort() W8 m*co
}; saaN$tU7
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public static String toString(int algorithm){ Kq0!.455
return name[algorithm-1]; zWh[U'6
} ]o]*&[C
)gR !G]Y
public static void sort(int[] data, int algorithm) { =a.avOZ
impl[algorithm-1].sort(data); X6dv+&=?
} cQMb+Q2Yw
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public static interface Sort { \kGi5G]
public void sort(int[] data); *rk!`n&
} Mo2b"A;}|
s) vHLf4T
public static void swap(int[] data, int i, int j) { 6M`N| %
int temp = data; V5{^R+_)Ya
data = data[j]; 8Dq;QH}
data[j] = temp; 0FV?By
} LGm>x
} -a[]#v9