[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; u-5{U-^_
} *=7U4W
int i1=l; ,nB5/Lx
int i2=mid+1; tC9n k5~
for(int cur=l;cur<=r;cur++){ Oo%d]8W
if(i1==mid+1) 3kMf!VL
data[cur]=temp[i2++]; FG*r'tC~r
else if(i2>r) ilx)*Y
data[cur]=temp[i1++]; Hg$lXtn]
else if(temp[i1] data[cur]=temp[i1++]; ,Vk3kmuvr]
else 46&/gehr
data[cur]=temp[i2++]; /d<P-!fK
} *w&Y$8c(
} <yFu*(Q
fsWTF<Y
} 'CkIz"Wd
'y3!fN=h
改进后的归并排序: ITT@,
OH(waKq2I
package org.rut.util.algorithm.support; +&2%+[nBZ
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import org.rut.util.algorithm.SortUtil; e;}7G
Ak"m 85B
/** KNIn:K^/
* @author treeroot )f<z%:I+Z
* @since 2006-2-2 u^qT2Ss0
* @version 1.0 3x'|]Ns
*/ "5wa91*
public class ImprovedMergeSort implements SortUtil.Sort { *itUWpNhr
RuVGG)
private static final int THRESHOLD = 10; lv+TD!b
]F'e aR
/* g~A`N=r;h
* (non-Javadoc) v<(
* "mvt>X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h|{]B,.Lh
*/ <T|3`#o0
public void sort(int[] data) { l&Q`wR5e
int[] temp=new int[data.length]; EGF '"L
mergeSort(data,temp,0,data.length-1); W+ko q*P
} oEKvl3Hz_
4 VW[E1<
private void mergeSort(int[] data, int[] temp, int l, int r) { #KexvP&*
int i, j, k; xRLT=.ir
int mid = (l + r) / 2; aH/ k Ua
if (l == r) FZslv"F
return; <s<n
if ((mid - l) >= THRESHOLD) S2GxV/E
mergeSort(data, temp, l, mid); PKg@[<g43
else U6fgo3RH
insertSort(data, l, mid - l + 1); R3&Iu=g
if ((r - mid) > THRESHOLD) wHMX=N1/
mergeSort(data, temp, mid + 1, r); DjQFi
else '=8d?aeF
insertSort(data, mid + 1, r - mid); MXNFlP
uH- l%17
for (i = l; i <= mid; i++) { "8jf81V*
temp = data; ieCEo|b
} qL3;}R
for (j = 1; j <= r - mid; j++) { qwgPk9l
temp[r - j + 1] = data[j + mid]; CxOob1@
} dufu|BL|}
int a = temp[l]; Ata:^qI
int b = temp[r]; :hk5 .[
for (i = l, j = r, k = l; k <= r; k++) { *Y7u'v
if (a < b) { }"%?et(
data[k] = temp[i++]; EGU 0)<
a = temp; SdxDa
} else { hxd`OG<gF
data[k] = temp[j--]; 94.DHZqh
b = temp[j]; DJ [#5h5
} BdblLUGK#
} ;d"F%M y
} Y}|X|!0x
" h~Zu
/** .P%bkD6M
* @param data YdC6k?tzS
* @param l Nk VK
* @param i /,&<6c-Q@W
*/ [<6^qla
private void insertSort(int[] data, int start, int len) { FX`>J6l:X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KD7dye
} Tg)|or/%
} O6a<`]F
} wX5tp1 ?1J
} ipgC RHE
j8{i#;s!"
堆排序： qqr?!vem6
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package org.rut.util.algorithm.support; I%X6T@P
^"1n4im
import org.rut.util.algorithm.SortUtil; )SRefW.v
>xYpNtEs
/** 0c'<3@39k|
* @author treeroot l2rd9-T
* @since 2006-2-2 _] sn0rX
* @version 1.0 1AfnzGvA
*/ }mq6]ZrK
public class HeapSort implements SortUtil.Sort{ dIa+K?INX
xU>WEm2
/* (non-Javadoc) (X1e5j>Ru
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 37 ,
*/ Ou!2[oe@M
public void sort(int[] data) { bvr^zH,C
MaxHeap h=new MaxHeap(); xH(lm2kvT
h.init(data); Qu"\wE^.`
for(int i=0;i h.remove(); }c`"_L
System.arraycopy(h.queue,1,data,0,data.length); Cc' 37~6~P
} 8\ +T8(m
G"U9E5O
private static class MaxHeap{ 7>Ouqxh21
kmsb hYM)
void init(int[] data){ Z/;(fL
this.queue=new int[data.length+1]; H*&f:mfq
for(int i=0;i queue[++size]=data; }{qZ[/JwqN
fixUp(size); k,E{C{^M
} )=Z>#iH1
} l7259Ro~
]&xk30
private int size=0; otl0JHt*+
_jI,)sr4ic
private int[] queue; AOWmzu{zw
zRl3KjET
public int get() { :W:K:lk
return queue[1]; lhz{1P]s
} qL&[K>2z
}Jve cRtg1
public void remove() { W*4-.*U8a
SortUtil.swap(queue,1,size--); ox>^>wR*
fixDown(1); .TMs bZ|j
} ^aMg/.j
file://fixdown g\(G\ tnu>
private void fixDown(int k) { )}]g] g
int j; S)k*?dQ##R
while ((j = k << 1) <= size) { *1 ]uH e
if (j < size %26amp;%26amp; queue[j] j++; EXwo,?I
if (queue[k]>queue[j]) file://不用交换 oMD>Ywc-
break; D},>mfzF
SortUtil.swap(queue,j,k); 5k3n\sqZA
k = j; <fjX[l<Uz
} {3p4:*}
} Av$^
private void fixUp(int k) { F/bT)QT<f
while (k > 1) { ?m=N]!n
int j = k >> 1; 1k5Who@
if (queue[j]>queue[k]) :q7Wy&ow
break; k\YG^I
SortUtil.swap(queue,j,k); UcDS9f_87
k = j; *_{j=sd
} [vK^Um
} |zNX=mAV
u\x}8pn
} o\<ULW*
*@r/5pM2}
} 69?wc!
Un(aW=PQ0
SortUtil： M~#gRAUJ
ooL!TSGD
package org.rut.util.algorithm; bv9]\qC]T<
}[};IqVaK
import org.rut.util.algorithm.support.BubbleSort; ^qvbqfh
import org.rut.util.algorithm.support.HeapSort; N/'b$m5= S
import org.rut.util.algorithm.support.ImprovedMergeSort; swoQ'
import org.rut.util.algorithm.support.ImprovedQuickSort; BB$>h}
import org.rut.util.algorithm.support.InsertSort; [0[i5'K:
import org.rut.util.algorithm.support.MergeSort; k>Vci{v
import org.rut.util.algorithm.support.QuickSort; kr5">"7
import org.rut.util.algorithm.support.SelectionSort; VimE@Hz
import org.rut.util.algorithm.support.ShellSort; He/8=$c%
+I:Unp
/** ;Ax }KN7
* @author treeroot nQtWvT
* @since 2006-2-2 uR4z&y
* @version 1.0 PbgP\JeX
*/ "f2$w
public class SortUtil { }J`w4P
public final static int INSERT = 1; Lpz>>}
public final static int BUBBLE = 2; ,GIyq)
public final static int SELECTION = 3; `?qF$g9u~
public final static int SHELL = 4; n;Q7X>-f8`
public final static int QUICK = 5; K?Nhi^f"L
public final static int IMPROVED_QUICK = 6; :&rt)/I
public final static int MERGE = 7; H8zK$!
public final static int IMPROVED_MERGE = 8; <QAFL uey
public final static int HEAP = 9; V-2(?auZd
v0+BkfU+p
public static void sort(int[] data) { 4qh?,^Dq
sort(data, IMPROVED_QUICK); \0I_<
} cJ n=
private static String[] name={ VUGmi]qd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]^'Kd*x
}; l0w]`EE
m@F`!qY~Y\
private static Sort[] impl=new Sort[]{ Q&ptc>{bH6
new InsertSort(), x8\?}UnB
new BubbleSort(), JCzeXNY
new SelectionSort(), Jr!JHC9i
new ShellSort(), D~iz+{Q4
new QuickSort(), Uh4%}-;
new ImprovedQuickSort(), !bx;Ta.
new MergeSort(), )Y0!~# `
new ImprovedMergeSort(), .x.]`b(
new HeapSort() 6qpJUkd
}; 9C9oUtS
,vawzq[oSy
public static String toString(int algorithm){ 0[# 3;a
return name[algorithm-1]; a=1@*ID
} NC`aP0S
o]_dJB
public static void sort(int[] data, int algorithm) { vjCu4+w($Z
impl[algorithm-1].sort(data); aQcleTb
} $am$EU?s
Xp% v.M
public static interface Sort { "5!oi]@>(
public void sort(int[] data); uc\Kg1{
} 7wqK>Y1a
[`[|l
public static void swap(int[] data, int i, int j) { ~2N"#b&J
int temp = data; _pG-qK
data = data[j]; qLG&WB
data[j] = temp; RFcv^Xf
} fk>aqm7D!
} IGQFtO/x