[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; -!]ZMi9
} ^@NU}S):yN
int i1=l; g5r(>,vY
int i2=mid+1; WQO) =n
for(int cur=l;cur<=r;cur++){ t}/( b/VD
if(i1==mid+1) $\y'IQ%
data[cur]=temp[i2++]; SGlNKA},A
else if(i2>r) `%WU8Yv
data[cur]=temp[i1++]; )q3p-)@kQ
else if(temp[i1] data[cur]=temp[i1++]; }txX;"/
else hpL;bM'
data[cur]=temp[i2++]; 1|-Dj|
} by/jYg)+
} L5:$U>H(
UN<]N76!
} Nf1-!u7
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改进后的归并排序: mF^v~
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package org.rut.util.algorithm.support; WU=59gB+jL
@/-\k*T
import org.rut.util.algorithm.SortUtil; k7A-J\
[87,s.MK
/** jPW#(3hoE
* @author treeroot J!U}iD@occ
* @since 2006-2-2 3"KCh\\b
* @version 1.0 xAMW-eF?d
*/ < F+l
public class ImprovedMergeSort implements SortUtil.Sort { ZSd4z:/
3y8G?LL/[7
private static final int THRESHOLD = 10; HJYScwjQ;`
63,H{
/* _8UDT^?8,
* (non-Javadoc) um>6z_"
* gn".u!9j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a\YV3NJ/A
*/ g0ly
public void sort(int[] data) { bTs?!~q
int[] temp=new int[data.length]; ocS5SB]8
mergeSort(data,temp,0,data.length-1); 9kS^Abtk
} I->Ss},U
6h,(wo3Y
private void mergeSort(int[] data, int[] temp, int l, int r) { 6wECo
int i, j, k; 74k dsgQf
int mid = (l + r) / 2; 1rF]yi:X
if (l == r) TXvI4"&
return; ZO$m["|
if ((mid - l) >= THRESHOLD) ^J)mH[
mergeSort(data, temp, l, mid); Ayw ;N
else @{tz:f
insertSort(data, l, mid - l + 1); %Ax3;g#
if ((r - mid) > THRESHOLD) 3e;^/kf<9
mergeSort(data, temp, mid + 1, r); O%KsD[W;
else WE.{p>
insertSort(data, mid + 1, r - mid); -^h' >.
64G[|" j D
for (i = l; i <= mid; i++) { 8sTp`}54J
temp = data; Xi,CV[L\
} {NFr]LGOp
for (j = 1; j <= r - mid; j++) { ,J^b0@S
temp[r - j + 1] = data[j + mid]; "(z5{z?S
} IIF]/Ek]
int a = temp[l]; ,\
int b = temp[r]; c[4i9I3v
for (i = l, j = r, k = l; k <= r; k++) { v}O30wE
if (a < b) { *|C^=*j9
data[k] = temp[i++]; e2t-4} ww
a = temp; W~~7C,!
} else { vAh6+K.e
data[k] = temp[j--]; eWtZ]kB
b = temp[j]; pg.ri64H<
} ]#l/2V1
} LO khjHR
} 9~mh@Kgv
Q$1bWUS&
/** >x+6{^}Q>
* @param data ~yfNxH~k
* @param l E2@65b$
* @param i _w/EP
*/ mdmvT~`
private void insertSort(int[] data, int start, int len) { (k) l=]`}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UAFwi%@!-q
} Vq5k+3W+
} wrbLDod /
} gp^5#
} 6@e+C;j=
D 38$`j
堆排序： h[1MtmNw
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package org.rut.util.algorithm.support; 2`>ToWN!
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import org.rut.util.algorithm.SortUtil; o/6-3QUak
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/** u7[ykyV
* @author treeroot v:o({Y 1Aq
* @since 2006-2-2 X1Ac*oLN
* @version 1.0 ang~<
*/ NufLzg{
public class HeapSort implements SortUtil.Sort{ V7[zAq
WObvbaK
/* (non-Javadoc) `'c_=<&n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U{z9>
*/ kc @[9eV
public void sort(int[] data) { /.i.TQ]
MaxHeap h=new MaxHeap(); AvSM^
h.init(data); /D^"X 4!"
for(int i=0;i h.remove(); !{)tSipd
System.arraycopy(h.queue,1,data,0,data.length); %1O[i4s:-
} 6290ZNvr
+ 33@?fl.
private static class MaxHeap{ $Y_i4(
(v|}\?L
void init(int[] data){ no]z1D
this.queue=new int[data.length+1]; ;D s46M-s
for(int i=0;i queue[++size]=data; rEv*)W
fixUp(size); XC "'Q+
} %4 XJn@J
} !]fQ+*X0g
MpqZH{:?G
private int size=0; $:j G-r
Wg0g/
private int[] queue; 7&"n`@(.!
f<*Js)k
public int get() { T?1Du"d8
return queue[1]; 3=$q
} wTGbd
*B\H-lp?
public void remove() { L%$|^T=%
SortUtil.swap(queue,1,size--); /`;n@0k>2
fixDown(1); bY2 C]r(n
} RUUk f({(
file://fixdown @81Vc<dJ
private void fixDown(int k) { ND,Kldji
int j; -0Tnh;&=
while ((j = k << 1) <= size) { za9)Q=6FD
if (j < size %26amp;%26amp; queue[j] j++; 6ubL1K
if (queue[k]>queue[j]) file://不用交换 kWb2F7m
break; |R@~-Ht
SortUtil.swap(queue,j,k); he-Ji
k = j; tpEI(9>
} q;D+ai
} y"<))-MH
private void fixUp(int k) { ~iT{8
while (k > 1) { H5q:z=A
int j = k >> 1; ag/u8
if (queue[j]>queue[k]) aT/KT,!
break; xhD$e= g
SortUtil.swap(queue,j,k); s@M
k = j; .%hQJ{vf-^
} WA$ p_% r=
} bG1 ofsU
V%VrAi.
} CAA tco5
ZA) SJWwD
} wGZ>iLe:
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SortUtil： &*LA_]1@
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package org.rut.util.algorithm; zWP.1 aA&
u)N2
import org.rut.util.algorithm.support.BubbleSort; 00$ @0
import org.rut.util.algorithm.support.HeapSort; >;T$#LZ
import org.rut.util.algorithm.support.ImprovedMergeSort; nEeQL~:
import org.rut.util.algorithm.support.ImprovedQuickSort; 2D\x-!l/
import org.rut.util.algorithm.support.InsertSort; Z{8exym
import org.rut.util.algorithm.support.MergeSort; /gMa"5?,
import org.rut.util.algorithm.support.QuickSort; *B)Jv9
import org.rut.util.algorithm.support.SelectionSort; wC4AVJJ^>
import org.rut.util.algorithm.support.ShellSort; 7TMDZ*
.x\/XlM
/** G!> iqG
* @author treeroot Xs.$2
* @since 2006-2-2 ZEXj|wC
* @version 1.0 "W3n BaG
*/ (mOqv9pn
public class SortUtil { ~jgN_jz
public final static int INSERT = 1; 9Y!0>&o
public final static int BUBBLE = 2; ?[NTw./'7A
public final static int SELECTION = 3; Q0[CH~
public final static int SHELL = 4; }+QhW]nO{F
public final static int QUICK = 5; 2<\yky
public final static int IMPROVED_QUICK = 6; %nG~u,_2f
public final static int MERGE = 7; 2\$WP-)%
public final static int IMPROVED_MERGE = 8; |zRoXO`]-*
public final static int HEAP = 9; 945 |MQPn
&)fhlp5
public static void sort(int[] data) { hr$VVbOho
sort(data, IMPROVED_QUICK); 2:6Y83
} Aspj*CDu
private static String[] name={ KNUMz4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \M3NasZ
}; _z"ci$[
yC&b-y
private static Sort[] impl=new Sort[]{ }.Na{]<gh
new InsertSort(), 56j/w[&8
new BubbleSort(), MU^xu&MB
new SelectionSort(), jmZ|b6
new ShellSort(), ki][qvXJ
new QuickSort(), iJynR [7
new ImprovedQuickSort(), L3hxe]mr
new MergeSort(), Ej{eq^n
new ImprovedMergeSort(), d q+7K
new HeapSort() NIXcib"tG
}; V]CK'
FclSuQWti
public static String toString(int algorithm){ }IalgQ(i
return name[algorithm-1]; >sl1 cC
} aaa#/OWQZ
59%f|.Z)
public static void sort(int[] data, int algorithm) { MWd_6XM
impl[algorithm-1].sort(data); l7r N
} >TJKH^7n
`QyALcO
public static interface Sort { {0Ol/N;|D
public void sort(int[] data); i+ &lMgh
} f'?6D+Yw~
q0KXuMK
public static void swap(int[] data, int i, int j) { q.hc%s2?
int temp = data; Xy(SzJ%
data = data[j]; }s)&/~6
data[j] = temp; sR0e&Y
} w]P7!t
} Y_ ;i