[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; }y[o[>
} 6Jj)[ R\5=
int i1=l; ?_tOqh@in
int i2=mid+1; %pg*oX1VK6
for(int cur=l;cur<=r;cur++){ )m)>k` 0
if(i1==mid+1) ~RMOEH.o
data[cur]=temp[i2++]; ;G\rhk
else if(i2>r) \h0e09& I
data[cur]=temp[i1++]; ,5L&$Q6
else if(temp[i1] data[cur]=temp[i1++]; oFIs,[Go
else vF([mOZ
data[cur]=temp[i2++]; 0cS.|\ZTA
} vMC;5r6*d
} -#Wc@\;
K1+,y1c
} Viw{<VH=
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改进后的归并排序: 75v*&-
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package org.rut.util.algorithm.support; 6Q wL
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import org.rut.util.algorithm.SortUtil; .#Sd|C]R7
8;Pdd1GyUL
/** (ZI&'"H
* @author treeroot cdGl[dQ/
* @since 2006-2-2 0 /H1INve
* @version 1.0 mV4} -
*/ W%$p,^@S5
public class ImprovedMergeSort implements SortUtil.Sort { QR8F'7S
d5],O48A
private static final int THRESHOLD = 10; Fvv6<E
XSD7~X/:
/* 4a646jg)
* (non-Javadoc) (h%wO
* <Jvrmm[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j5HOdy2
*/ iL\\JuY
public void sort(int[] data) { h\ybh
int[] temp=new int[data.length]; hZJ Nh,,w
mergeSort(data,temp,0,data.length-1); /3c1{%B\
} <w:fR|O
Cn{UzSKfs
private void mergeSort(int[] data, int[] temp, int l, int r) { HL!-4kN <$
int i, j, k; "xO`&a{
int mid = (l + r) / 2; VtmUK$k}I
if (l == r) [ z&y]~
return; }0!\%7-Q
if ((mid - l) >= THRESHOLD) 8t7hN?,t
mergeSort(data, temp, l, mid); AV&ege
else =AAH}
insertSort(data, l, mid - l + 1); dZYS5_wr
if ((r - mid) > THRESHOLD) -+4$W{OK*0
mergeSort(data, temp, mid + 1, r); 0loC^\f
else Df4n9m}E
insertSort(data, mid + 1, r - mid); xFvSQ`sp
v EX <9
for (i = l; i <= mid; i++) { VEpQT Qp
temp = data; 6D+k[oHZm
} AKWw36lm
for (j = 1; j <= r - mid; j++) { hQ\]vp7V
temp[r - j + 1] = data[j + mid]; /2U.,vw
} !eO?75/
int a = temp[l]; m$cM+
int b = temp[r]; D0-e,)G}V,
for (i = l, j = r, k = l; k <= r; k++) { IQ~()/;3d
if (a < b) { >/n/n{{
data[k] = temp[i++]; w5|"cD#8A
a = temp; vTP_vsdeG
} else { jQdfFR
data[k] = temp[j--]; gGX/p6"
b = temp[j]; bEE:6)]G
} eQeNlCG
} kjmF-\
} !6}Cs3.
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/** V{*9fB#4L
* @param data .Q#Eb %%
* @param l Q2 edS|
* @param i -yAIrvO1q
*/ W"0#
private void insertSort(int[] data, int start, int len) { _Yhpj}KZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); un\^Wmbw
} :I7MP
} *V\kS
} 1jF}g`At
} bH.">IV
4EELaP|%
堆排序： HWd,1
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package org.rut.util.algorithm.support; #}gc6T~0
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import org.rut.util.algorithm.SortUtil; |~/{lE=I
6`s[PKP.
/** r*$"]{m}
* @author treeroot k^L (q\D
* @since 2006-2-2 jC@^/rMh
* @version 1.0 l)|CPSN?w
*/ WGO=@jkf
public class HeapSort implements SortUtil.Sort{ RHBEC@d[}
FJ!>3V;}
/* (non-Javadoc) ^1g6(k'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *rbH|o8
*/ #A/jGv^
public void sort(int[] data) { ~<eiWDf
MaxHeap h=new MaxHeap(); 3! +5MsR+
h.init(data); H;CGLis
for(int i=0;i h.remove(); UFl*^j_)]
System.arraycopy(h.queue,1,data,0,data.length); e (f)?H
} JDs<1@\
Fivv#4YO
private static class MaxHeap{ U8c0C/
1zM`g_(#
void init(int[] data){ t (1z+
this.queue=new int[data.length+1]; (PNvv/A
for(int i=0;i queue[++size]=data; h%O`,iD2
fixUp(size); '"TBhisky
} 99eS@}RC
} s)L7o)56/
}Bb(wP^B.
private int size=0; g7H;d
J^W.TM&q$,
private int[] queue; 1idEm*3&(
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public int get() { S*]IR"YL
return queue[1]; <O*q;&9
} !1l2KW<be
dfrq8n]
public void remove() { }l/md/C0
SortUtil.swap(queue,1,size--); KW09qar
fixDown(1); 5GY%ZRHh
} $""[( d?0
file://fixdown 7!%cKZCY
private void fixDown(int k) { $ey<8qzp
int j; h8h4)>:
while ((j = k << 1) <= size) { A ssf f;
if (j < size %26amp;%26amp; queue[j] j++; |hpm|eZG"h
if (queue[k]>queue[j]) file://不用交换 NBeGmC|
break; Qj=l OhM
SortUtil.swap(queue,j,k); m$o|s1t
k = j; hsl8@=_ B
} _ 9k^Hd[L$
} kgQEg)A]!x
private void fixUp(int k) { \<PW_'6
while (k > 1) { 6^zv:C%
int j = k >> 1; ~E!"YkIr
if (queue[j]>queue[k]) )rXP2Z
break; X23TS`
SortUtil.swap(queue,j,k); :?S2s Ne2
k = j; 2"mO"2d%
} qvt~wJf<
} #mj+|/0
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} Y3-P*
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} ="u(o(j"
uM\~*@
SortUtil： x=H*"L=
ja:%j&:
package org.rut.util.algorithm; 1{,WY(,c
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import org.rut.util.algorithm.support.BubbleSort; ~@-Az([H
import org.rut.util.algorithm.support.HeapSort; A$ S9 `
import org.rut.util.algorithm.support.ImprovedMergeSort; 7' 6m;b~F
import org.rut.util.algorithm.support.ImprovedQuickSort; Yd,*LYd2EL
import org.rut.util.algorithm.support.InsertSort; u'N'<(\k
import org.rut.util.algorithm.support.MergeSort; 9 ROKueP
import org.rut.util.algorithm.support.QuickSort; L7KHs'c*
import org.rut.util.algorithm.support.SelectionSort; ,mRN;|N
import org.rut.util.algorithm.support.ShellSort; qH-dT,`"{
;hg]5r_
/** jf})"fz-*
* @author treeroot s=6w-'; V
* @since 2006-2-2 "ex? #qD&
* @version 1.0 GoFC!nx
*/ pa+y(!G
public class SortUtil { 6 o+zhi;E
public final static int INSERT = 1; P#yS]F/
public final static int BUBBLE = 2; G U!XD!!&
public final static int SELECTION = 3; +J^}"dG
public final static int SHELL = 4; }FFW,x
public final static int QUICK = 5; R sujKh/
public final static int IMPROVED_QUICK = 6; ^+P]_< 43
public final static int MERGE = 7; ]vlQNd?
public final static int IMPROVED_MERGE = 8; 2V
public final static int HEAP = 9; I*24%z9
:H?p^d e
public static void sort(int[] data) { p?!]sO1l
sort(data, IMPROVED_QUICK); r3KV.##u,
} *mBEF"
private static String[] name={ E]gKJVf9[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" beq)Frn^
}; OixQlAb{
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private static Sort[] impl=new Sort[]{ 9@S icqx
new InsertSort(), oACE:h9U
new BubbleSort(), #<?j784
new SelectionSort(), 7{b|+0W
new ShellSort(), :Z/ig%
new QuickSort(), pY:xxnE
new ImprovedQuickSort(), ;`xu)08a
new MergeSort(), mp5]=6~:m
new ImprovedMergeSort(), O4}cv
new HeapSort() Dm5UQe
}; '[A>eC++
mB!81%f%|
public static String toString(int algorithm){ Pajr`gU
return name[algorithm-1]; A5nu`e9&
} \F<]l6E
*D\nsJ*g
public static void sort(int[] data, int algorithm) { |D^[]*cEH
impl[algorithm-1].sort(data); 'Oq}BVR&
} $D45X<
;id
public static interface Sort { `yxk Sb
public void sort(int[] data); ?n_Y_)9
} W58\V
Xe%n.DW m
public static void swap(int[] data, int i, int j) { 8HWY]:|oh
int temp = data; $i3/||T,9
data = data[j]; 9J1&g(?>-
data[j] = temp; U2K>\/-~
} I=b#tUBh8
} myXp]=Sb?