[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; _0ki19rs
} XQ]noaU
int i1=l; TZ{';oU
int i2=mid+1; b?eIFI&w^l
for(int cur=l;cur<=r;cur++){ ;`',M6g
if(i1==mid+1) x9q?^\x
data[cur]=temp[i2++]; :["iBrFp
else if(i2>r) ~kPHf_B;z
data[cur]=temp[i1++]; Jt5\
else if(temp[i1] data[cur]=temp[i1++]; "vI:B}
else b{JcV
data[cur]=temp[i2++]; 7p*PDoM6`
} tIfA]pE
} Uo?g@D
_|reo6
} Y!s94#OaZ
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改进后的归并排序: #v+2W
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package org.rut.util.algorithm.support; cB#5LXbCE
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import org.rut.util.algorithm.SortUtil; ;Gixu9u'
T1AD(r\W5
/** C$?gt-tJ'
* @author treeroot __N< B5E
* @since 2006-2-2 Ahl-EVIr<
* @version 1.0 :}(Aq;}X
*/ 1;8=,&
public class ImprovedMergeSort implements SortUtil.Sort { Aiyx!Q6vT
%;ST7
private static final int THRESHOLD = 10; *|WS,
%L(;}sJ.
/* &h^E_]P
* (non-Javadoc) Bv-|#sdxm
* \cJ?2^Eq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZcJa:
*/ {jdtNtw
public void sort(int[] data) { CVUA7eG+
int[] temp=new int[data.length]; y2Eq-Ie
mergeSort(data,temp,0,data.length-1); xAJ N(8?
} 2kukQj(n
C7PVJnY0
private void mergeSort(int[] data, int[] temp, int l, int r) { u NmbR8Mx
int i, j, k; >Sc)?[H
int mid = (l + r) / 2; RHO|g0
if (l == r) 80J87\)
return; U'4j+vUc
if ((mid - l) >= THRESHOLD) ?X $#J'U;
mergeSort(data, temp, l, mid); T0HNld
else bsClw
insertSort(data, l, mid - l + 1); ky4;7RK
if ((r - mid) > THRESHOLD) c_V^~hq
mergeSort(data, temp, mid + 1, r); wPr9N}rf
else XotiKCk|Aq
insertSort(data, mid + 1, r - mid); (U_`Q1Jo
0FN;^hP5|
for (i = l; i <= mid; i++) { \NZ(Xk
temp = data; I:|<};mm
} |ty?Ah,vb
for (j = 1; j <= r - mid; j++) { TEJn;D<1I,
temp[r - j + 1] = data[j + mid]; q8Jhs7fv
} ]S
int a = temp[l]; 3#\++h]QZ
int b = temp[r]; pVm]<jO
for (i = l, j = r, k = l; k <= r; k++) { SI)QX\is8
if (a < b) { 4*0C_F@RX
data[k] = temp[i++]; bwR$910b
a = temp; (r6'q0[
} else { I3I1<}>]Z
data[k] = temp[j--]; {{:QtkN
b = temp[j]; lwSZpS
} yf4I<v$y
} \=1$$EDS9
} CE5A^,EsB
']bw37_U,
/** q"@>rU4
* @param data r5,V-5b
* @param l g)Tr#
* @param i WWEZTFL:j
*/ }AW"2<@
private void insertSort(int[] data, int start, int len) { +,Ud 3iS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V?L8BRnV
} w!%"b03q
} Qx")D?u
} H8x66}
} ""@kBY1C
tE8aL{<R
堆排序： =vs]Kmm
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package org.rut.util.algorithm.support; 3<x1s2U
,+4*\yI3l
import org.rut.util.algorithm.SortUtil; Jn&^5,J]F8
drQI@sPp
/** ^`S.Mw.
* @author treeroot nYnBWDnV
* @since 2006-2-2 OWys`2W
* @version 1.0 ,W|cyQ
*/ [xdi.6%
public class HeapSort implements SortUtil.Sort{ / q| o
MBqw{cy
/* (non-Javadoc) HfPu~P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +;ylld
*/ %Ze]6TP/><
public void sort(int[] data) { %M*2j%6
MaxHeap h=new MaxHeap(); 2EH0d6nt
h.init(data); ES)@iM?5
for(int i=0;i h.remove(); N(l
System.arraycopy(h.queue,1,data,0,data.length); der\"?_.
} `F$lO2#k
onU\[VvM
private static class MaxHeap{ Aw]kQ\P&
G3o`\4p
void init(int[] data){ jdIAN
this.queue=new int[data.length+1]; I}+9@d
for(int i=0;i queue[++size]=data; gW-mXb
fixUp(size); Mi}.
} ] T<#bNK\1
} W1&"dT@
||))gI`3a
private int size=0; &^7(?C'u
Vb)NWXmyu
private int[] queue; u}.mJDL
d"tR?j
public int get() { FeNNzV=
return queue[1]; A">R-1R
} >9NC2%61S
P Ij
public void remove() { \hWac%#
SortUtil.swap(queue,1,size--); Q*hXFayx
fixDown(1); eQwvp`@"
} Jflm-Hhsf
file://fixdown J$U_/b.mk
private void fixDown(int k) { g2?yT ?
int j; p<<dj%
while ((j = k << 1) <= size) { NwVhJdo
if (j < size %26amp;%26amp; queue[j] j++; '6cXCO-_P
if (queue[k]>queue[j]) file://不用交换 vY7@1_"
break; y'!"GrbZ
SortUtil.swap(queue,j,k); B3<sSe8L0
k = j; lL&U ioo}D
} DYoGtks(
} l.P;85/+
private void fixUp(int k) { CEVisKcE:
while (k > 1) { -Jf}3$Ra
int j = k >> 1; cbYQ';{
if (queue[j]>queue[k]) <kk!nsI
break; ,pY:kQ
SortUtil.swap(queue,j,k); G^';9 UK
k = j; EywBT
} G)q;)n;*=
} cTq;<9Iew
3~{0X-
} DJ9x?SL@KD
A+j!VM
} W4bN']?
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SortUtil： p:)=i"uL
S503b*pM
package org.rut.util.algorithm; w:/3%-
kZ PL$\/A
import org.rut.util.algorithm.support.BubbleSort; CvR-lKV<
import org.rut.util.algorithm.support.HeapSort; `(ik2#B`}
import org.rut.util.algorithm.support.ImprovedMergeSort; T2n3g|4
import org.rut.util.algorithm.support.ImprovedQuickSort; S>)[n]f
import org.rut.util.algorithm.support.InsertSort; %WC^aKfY
import org.rut.util.algorithm.support.MergeSort; #hP>IU
import org.rut.util.algorithm.support.QuickSort; &F:.OVzX
import org.rut.util.algorithm.support.SelectionSort; ^^lx Ot
import org.rut.util.algorithm.support.ShellSort; :[CEHRc7x
mlPvF%Ba
/** !>V)x
* @author treeroot , 6Jw
* @since 2006-2-2 Qm=iCZ|E^!
* @version 1.0 xI.0m
*/ ~4|Trz2T
public class SortUtil { 'c_K[p$
public final static int INSERT = 1; 5fMlOP_
public final static int BUBBLE = 2; Pf/8tXs}
public final static int SELECTION = 3; 0yvp>{;p
public final static int SHELL = 4; :wN!E{0j
public final static int QUICK = 5; t-5Y,}j
public final static int IMPROVED_QUICK = 6; k]^ya?O]p
public final static int MERGE = 7; oh@Ha?
public final static int IMPROVED_MERGE = 8; !.-u'6e
public final static int HEAP = 9; 0qIg:+l+
7A) E4f'
public static void sort(int[] data) { B,&QI&k`~
sort(data, IMPROVED_QUICK); y=.bn!u}z
} J .VZD
private static String[] name={ O;5lF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?;H}5>^8P
}; x7Gf):,LK
ktS^^!,l%
private static Sort[] impl=new Sort[]{ L|}s Z\2!
new InsertSort(), [[w |
new BubbleSort(), nMZ)x-
new SelectionSort(), qGX#(,E9;
new ShellSort(), +jK-k_
new QuickSort(), IibYGF
new ImprovedQuickSort(), H cyoNY
new MergeSort(), N|Ag8/2A
new ImprovedMergeSort(), q3#+G:nh
new HeapSort() (Q @'fb9z
}; x$bUd 9
aL`wz !
public static String toString(int algorithm){ "<{|ni}
return name[algorithm-1]; ,p OGT71
} jr_z ?
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public static void sort(int[] data, int algorithm) { "*.N'J\
impl[algorithm-1].sort(data); }r!+wp
} t=xEUOQAn
qTN%9!0@9
public static interface Sort { 9(nq 4HvI
public void sort(int[] data); F>3 o0ke}
} k& +gkJm
_ziSH 3(
public static void swap(int[] data, int i, int j) { .c~z^6x
int temp = data; D/~1?p
data = data[j]; aidQ,(PDj
data[j] = temp; "bDj00nwh
} }]PHE(}7
} \D(3~y>