[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; nt6"}vO
} @d|9(,Q
int i1=l; m6D4J=59
int i2=mid+1; x ,W+:l9~s
for(int cur=l;cur<=r;cur++){ sn%fE
if(i1==mid+1) kF .b)
data[cur]=temp[i2++]; KMcP!N.I
else if(i2>r) |zKcL3*
data[cur]=temp[i1++]; 5$X{{j2
else if(temp[i1] data[cur]=temp[i1++]; tHeLq*))
else >wwEa4
data[cur]=temp[i2++]; 5JXLfYTUI
} f -5ZXpWs'
} QZol(2~Y
D.?gV_
} '-=?lyKv
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改进后的归并排序: /Z_QCj
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package org.rut.util.algorithm.support; "?SnA +)
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import org.rut.util.algorithm.SortUtil; da@ .J9
v#xF;@G
/** om6R/K
* @author treeroot ,fn=%tiUk
* @since 2006-2-2 9 pn1d.
* @version 1.0 FBsw\P5w
*/ `u-Y 5mY
public class ImprovedMergeSort implements SortUtil.Sort { &7LfNN`
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private static final int THRESHOLD = 10; mf#oa~_
q`hg@uwA{`
/* wlJ1,)n^2
* (non-Javadoc) #A!0KN;GC2
* <>TBM^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yyc&'J
*/ 3B+Rx;>h
public void sort(int[] data) { O9Aooe4W=
int[] temp=new int[data.length]; \=)h6AG
mergeSort(data,temp,0,data.length-1); r+Y1m\
} x{E[qH_1Fm
trLs4o,
private void mergeSort(int[] data, int[] temp, int l, int r) { ~gN'";1i
int i, j, k; `F#KXk
int mid = (l + r) / 2; SW7%SX,xM
if (l == r) .kVga+la?
return; )=[Tgh
if ((mid - l) >= THRESHOLD) ?jbam!A
mergeSort(data, temp, l, mid); W2RS G~|
else kVY@q&p
insertSort(data, l, mid - l + 1); C;` fOCz^
if ((r - mid) > THRESHOLD) jolCR-FDu
mergeSort(data, temp, mid + 1, r); <Vim\
else ]+AI:
insertSort(data, mid + 1, r - mid); $1e@3mzM
@,]v'l!u
for (i = l; i <= mid; i++) { <IYt*vlm
temp = data; 4.8,&{w<m
} ; OsN^
for (j = 1; j <= r - mid; j++) { #qWEyb2UZ
temp[r - j + 1] = data[j + mid]; 0:*$i(2
} n2E2V<#
int a = temp[l]; hf[K\aAk
int b = temp[r]; S`::f(e
for (i = l, j = r, k = l; k <= r; k++) { 7j+.H/2
if (a < b) { (\j<`"n
data[k] = temp[i++]; I ;_.tG
a = temp; IX}l)t[:(
} else { 39"'Fz?1
data[k] = temp[j--]; f]Vz!hM~
b = temp[j]; N|DY)W
} x{rt\OT
} `fs[C
} vI-KH:r"{
MmX42;Pw
/** U+KbvkX wj
* @param data MIgIt"M jz
* @param l 7Ny>W(8
* @param i m ]\L1&
*/ 6?6 u
private void insertSort(int[] data, int start, int len) { z"<PveVo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |^ qW
} 8]O|$8'"
} 1g;3MSn~
} 7cC$)
} L@/+u+j0
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堆排序： Z"n]y4h
4AGc2e'u
package org.rut.util.algorithm.support; <,m}TTq
f:TW<
import org.rut.util.algorithm.SortUtil; v#~,)-D&
_?{2{^v
/** DT*/2TH*l
* @author treeroot * 08LW|:,
* @since 2006-2-2 /F\7_
* @version 1.0 p'H5yg3h
*/ 8w{V[@QLn
public class HeapSort implements SortUtil.Sort{ 0xC!d-VIJ
dWI\VS9
/* (non-Javadoc) w(vf>L6(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9`xq3EL2T
*/ XLtuck
public void sort(int[] data) { `p!.K9r7
MaxHeap h=new MaxHeap(); 4o%hH
h.init(data); toF@@%
for(int i=0;i h.remove(); pRC#DHcHh
System.arraycopy(h.queue,1,data,0,data.length); y"2c; *7[{
} !l'Zar
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private static class MaxHeap{ =%a.C(0&G
1Ao"DxZHy7
void init(int[] data){ "MyYu}AD
this.queue=new int[data.length+1]; "DUL} "5T
for(int i=0;i queue[++size]=data; 5vS'Qhc
fixUp(size); lY6U$*9c
} pM>.z9
} >9|Q,/b0
'HOt?lpu!
private int size=0; ;N)qNiJY
ztu N0}'
private int[] queue; [\I\).
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public int get() { n|(Y?`(
return queue[1]; 7Q^t(
} n.XT-X^
poM VB{U
public void remove() { _N<8!(|w
SortUtil.swap(queue,1,size--); Z rvb %
fixDown(1); P/^:IfuR
} OrzDr
file://fixdown r> NgJf,
private void fixDown(int k) { 0n5N-b?G-@
int j; J&lQ,T!?B
while ((j = k << 1) <= size) { T'w=v-(J
if (j < size %26amp;%26amp; queue[j] j++; oqG 0 @@
if (queue[k]>queue[j]) file://不用交换 <}|+2f233+
break; u\6:Txqq
SortUtil.swap(queue,j,k); v=|ahsYC
k = j; rl!c\
} XrYz[h*)!
} 6}[W%S]8
private void fixUp(int k) { gPDc6{/C<
while (k > 1) { ;0ake%v]
int j = k >> 1; M7hff4c
if (queue[j]>queue[k]) 63ht|$G
break; @*F NWT6
SortUtil.swap(queue,j,k); `?~pk)<C].
k = j; 9HWtdJ+^C=
} 'DVPx%p
} ~~>D=~B0'
>YD? pDPb/
} "MlY G6
ptX;-'j(
} >i=mw5`D]
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SortUtil： FLi)EgZXt
=EFF2M`F
package org.rut.util.algorithm; xqIt?v2c
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import org.rut.util.algorithm.support.BubbleSort; Fz-Bd*uS
import org.rut.util.algorithm.support.HeapSort; o ;.j_
import org.rut.util.algorithm.support.ImprovedMergeSort; $n!saPpxS
import org.rut.util.algorithm.support.ImprovedQuickSort; `j@2[XdHu
import org.rut.util.algorithm.support.InsertSort; ij/ |~-!
import org.rut.util.algorithm.support.MergeSort; @ 3FTf"#Y
import org.rut.util.algorithm.support.QuickSort; U^[<G6<9]
import org.rut.util.algorithm.support.SelectionSort; 7?e*b(vd
import org.rut.util.algorithm.support.ShellSort; q0$}MB6
Xn4U!<RT"
/** }VdohX-
* @author treeroot OSxr@
* @since 2006-2-2 C}#JvNyQ
* @version 1.0 nT9B?P>
*/ &Zd!|u
public class SortUtil { h8Kri}z;M
public final static int INSERT = 1; 6!O~:\`DJ
public final static int BUBBLE = 2; a3JG&6-
public final static int SELECTION = 3; !fjDO!,!
public final static int SHELL = 4; Kh}#At^C8e
public final static int QUICK = 5; 5^*I]5t8
public final static int IMPROVED_QUICK = 6; ,SH))%Cyt
public final static int MERGE = 7; c:M~!CXO
public final static int IMPROVED_MERGE = 8; cV=h8F
public final static int HEAP = 9; (m25ZhW
G-xW&wC-
public static void sort(int[] data) { u05Zg*.[
sort(data, IMPROVED_QUICK); ?(4=:o
} Js ~_8
private static String[] name={ qf7lQovK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o{lR_
}; g7rn|<6FI
hr(E,TAe
private static Sort[] impl=new Sort[]{ ma,H<0R
new InsertSort(), ;5?$q
new BubbleSort(), hxGZ}zq*S
new SelectionSort(), 6j+_)7.V
new ShellSort(), QVsOB$
new QuickSort(), ^,qi`Tk
new ImprovedQuickSort(), 7NE"+EP\{2
new MergeSort(), :iP2e+j
new ImprovedMergeSort(), tY~EB.%
new HeapSort() ~sx?aiO
}; 3[amCKel
_f8Wa u# "
public static String toString(int algorithm){ &82Za%
return name[algorithm-1]; \x5b=~/
} B;@7
fczId"
public static void sort(int[] data, int algorithm) { |gg6|,Bt4
impl[algorithm-1].sort(data); gDa}8!+i
} =`Pgo5A
sEm-Td+A5
public static interface Sort { mfc\w'
public void sort(int[] data); pa*bqPi
} 3dTz$s/[
8m\*~IX=
public static void swap(int[] data, int i, int j) { gi#bU
int temp = data; Q30AaG}f
data = data[j]; ~7IXJeon
data[j] = temp; "AMbU68
} _o`+c wc
} ?A+-k4l