[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; iZB?5|*
} ogH{
int i1=l; Lk6UT)C
int i2=mid+1; f3]Z22Yq
for(int cur=l;cur<=r;cur++){ r:2G11[
if(i1==mid+1) Zx7Y ,0
data[cur]=temp[i2++]; kFW9@!9
else if(i2>r) \vXo~_-&
data[cur]=temp[i1++]; {A2(a7vV
else if(temp[i1] data[cur]=temp[i1++]; 8TZNvN4u
else _<|NVweFS
data[cur]=temp[i2++]; 0{j]p^'<
} iVLfAN @
} r'#5ncB
r1yz ?Y_P
} HP^<2?K
h.E8G^}@
改进后的归并排序: /\V-1 7-
p?2\9C4
package org.rut.util.algorithm.support; }eetx68\
Ds? @LE|
import org.rut.util.algorithm.SortUtil; /qa{*"2Qo
K>hQls+
/** `+[Ct08
* @author treeroot 9&}$C]`
* @since 2006-2-2 &#^^UT(nj
* @version 1.0 dE~]%fUFy-
*/ @&p:J0hbp
public class ImprovedMergeSort implements SortUtil.Sort { S=B?bD_,c
AI0YK"c?
private static final int THRESHOLD = 10; hkB/ OJ
CT,PQ
/* r#rL~Rsd}
* (non-Javadoc) 2wLnRP`*
* ICAp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m:&go2Y
*/ LK\L}<;1V
public void sort(int[] data) { '/8{Mx+
int[] temp=new int[data.length]; 4eH:eCZze
mergeSort(data,temp,0,data.length-1); T%74JRQ
} vZMb/}-o
czNi)4x
private void mergeSort(int[] data, int[] temp, int l, int r) { 2%4u/
int i, j, k; lTb4quf8I
int mid = (l + r) / 2; : EA-L
if (l == r) (D2G.R\pr
return; e1cqzhI=nA
if ((mid - l) >= THRESHOLD) eXKpum~
mergeSort(data, temp, l, mid); Ckd j|
else >b\{y}[
insertSort(data, l, mid - l + 1); atr0hmQ
if ((r - mid) > THRESHOLD) dfy]w4ETB
mergeSort(data, temp, mid + 1, r); &/dYJv$[9
else #aI(fQZe
insertSort(data, mid + 1, r - mid); rhff8C//'
1 S<E=7
for (i = l; i <= mid; i++) { X~UrAG}_
temp = data; 5&)T[Q X`
} B&fH FyK1n
for (j = 1; j <= r - mid; j++) { To/6=$wto
temp[r - j + 1] = data[j + mid]; x%h4'Sm
} W%ml/ 4
int a = temp[l]; 1t+uMhy*y
int b = temp[r]; L6d^e53AP
for (i = l, j = r, k = l; k <= r; k++) { z)%Ke~)<\@
if (a < b) { S\76`Ot
data[k] = temp[i++]; u~rPqBT{d3
a = temp; Q|KD$2rB
} else { /]U),LbN
data[k] = temp[j--]; K;8{qQ*
b = temp[j]; <C1w?d$9I
} edai2O
} ^8.s"4{
} h`i*~${yg
*.us IH2
/** ;t~Y>,
* @param data P5Bva
* @param l G*s5GG@Z.
* @param i SI`ems{1>c
*/ vVhSl$mW
private void insertSort(int[] data, int start, int len) { mzO5&h7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C6"{-{H
} v[~~q
} t $m:
} s4uZ>
} 0g8ykGyx
,NAwSmocVP
堆排序： 1y3)ogL
%OJ"@6A
package org.rut.util.algorithm.support; 'QSj-
_U|rTil
import org.rut.util.algorithm.SortUtil; V=gu'~
:]icW^%
/** 3mQ3mV:
* @author treeroot 7aS%;EU
* @since 2006-2-2 XE'3p6
* @version 1.0 vs^)=
*/ /H?) qk
public class HeapSort implements SortUtil.Sort{ ep6V2R
wG&Z7C b
/* (non-Javadoc) `z^50Vh|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mGpBj9jr1
*/ xyP0haE
public void sort(int[] data) { C1#f/o->
MaxHeap h=new MaxHeap(); n5 <B*
h.init(data); QYj*|p^x
for(int i=0;i h.remove(); ]DUmp6
System.arraycopy(h.queue,1,data,0,data.length); wE-y4V e
} SmS6B5j\R
: sG/
private static class MaxHeap{ \=[38?QOY
e#vGrLs.
void init(int[] data){ zjTCq; G
this.queue=new int[data.length+1]; peew<SX
for(int i=0;i queue[++size]=data; WOeG3jMz?
fixUp(size); l*Q OM
} V`0Y p
} ewdcAF5
^?: Az
private int size=0; 2q UX"a4
u/CR7Y
private int[] queue; T2A74>Nw
8.&P4u i
public int get() { R|k!w]
return queue[1]; &k`/jl;u
} rM4Ri}bS
cpPS8V
public void remove() { m2l0`l~T8
SortUtil.swap(queue,1,size--); 9&HaEAme
fixDown(1); EUq6) K
} )afH:
file://fixdown )+"(7U<
private void fixDown(int k) { 1]W8A.ZS
int j; f7a"}.D$
while ((j = k << 1) <= size) { [U$`nnp
if (j < size %26amp;%26amp; queue[j] j++; 3t5WwrNh
if (queue[k]>queue[j]) file://不用交换 A9WOu*G1O
break; &?I3xzvK
SortUtil.swap(queue,j,k); BwYR"
k = j; VrKLEN\
} MH]?:]K9V
} 'X\C/8\
private void fixUp(int k) { DB'3h7T
while (k > 1) { ?IDkDv!na~
int j = k >> 1; DG=_E\"#
if (queue[j]>queue[k]) ;m:I
break; PWV+M@
SortUtil.swap(queue,j,k); iA4VT,
k = j; .B!L+M< [
} %+dRjG~TB
} QbYNL9%
oMxpdG3y-
} Va/}|&9
4)9Pgp:
} L(/wsw~y*
"^t;V+Io
SortUtil： 9x14I2
ai)?RF
package org.rut.util.algorithm; ?aZ\Dg{
[5]* Be
import org.rut.util.algorithm.support.BubbleSort; ]2z Gb5s"
import org.rut.util.algorithm.support.HeapSort; ?osYs<k \
import org.rut.util.algorithm.support.ImprovedMergeSort; =/N0^
import org.rut.util.algorithm.support.ImprovedQuickSort; fM<g++X
import org.rut.util.algorithm.support.InsertSort; \qbEC.-K
import org.rut.util.algorithm.support.MergeSort; r+nhm"9
import org.rut.util.algorithm.support.QuickSort; Ucj>gc=
import org.rut.util.algorithm.support.SelectionSort; w.Kp[
import org.rut.util.algorithm.support.ShellSort; ZQ~EaI9R
n(\VP!u5r
/** ={nuz-3
* @author treeroot HF%)ip+
* @since 2006-2-2 &wB?ks
* @version 1.0 t<qXXQ&5
*/ iu'rc/=V
public class SortUtil { -axmfE?g0
public final static int INSERT = 1; c6HH%|
public final static int BUBBLE = 2; B=2f-o
public final static int SELECTION = 3; O:X|/g0Y
public final static int SHELL = 4; f>+:UGmP
public final static int QUICK = 5; oz?6$oE(bt
public final static int IMPROVED_QUICK = 6; nIqmora
public final static int MERGE = 7; @xAfD{}f!
public final static int IMPROVED_MERGE = 8; g8;JpPw
public final static int HEAP = 9; SZC1$..2T
5,?Au
public static void sort(int[] data) { j=w`%nh4"f
sort(data, IMPROVED_QUICK); 9Dx9alJR
} }!Xj{Eoc
private static String[] name={ xW'(]Z7_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C9cQ} j:
}; 96CC5
a.g:yWL\
private static Sort[] impl=new Sort[]{ -\fn\n
new InsertSort(), }MV=t7x9+
new BubbleSort(), AY%Y,<a
new SelectionSort(), Og<UW^VR
new ShellSort(), YS&Q4nv-
new QuickSort(), ESv&x6H
new ImprovedQuickSort(), wz5*?[4
new MergeSort(), 0t}&32lL&
new ImprovedMergeSort(), Amvl/bO
new HeapSort() 3+r8yiY
}; Uzd\#edxJ
MQGR-WV=5
public static String toString(int algorithm){ mkt%|Kb.
return name[algorithm-1]; W RVm^
} (cqVCys
hlTM<E
public static void sort(int[] data, int algorithm) { JIU=^6^2'
impl[algorithm-1].sort(data); R>. %0%iq
} `}fwR
qQUCK
public static interface Sort { @I|gA
public void sort(int[] data); Sj<WiQ%<
} uvf}7
Q#rj>+?
public static void swap(int[] data, int i, int j) { Q{+&3KXH
int temp = data; J.QFrIB{]+
data = data[j]; )R'~{;z }
data[j] = temp; DZ Q=Sinry
} Th)Z?\8zk
} i>68gfx