[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; kr{eC/Q"
} J{qpGRQNa
int i1=l; m)oGeD( !
int i2=mid+1; G~FAChI8![
for(int cur=l;cur<=r;cur++){ sUTfY|<7|
if(i1==mid+1) *-lw2M9V
data[cur]=temp[i2++]; "&{sE RYY
else if(i2>r) /j(3 ~%]o4
data[cur]=temp[i1++]; n04lTME
else if(temp[i1] data[cur]=temp[i1++]; A.>L>uR
else M~"93Q`f^
data[cur]=temp[i2++]; ? ht;ZP
} P(Wr[lH\y
} x2@W,?oPm
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} _7P#?:h
rFl6xM;F
改进后的归并排序: PZE{-TM?W
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package org.rut.util.algorithm.support; ,I^:xw_
#a|.cm>6
import org.rut.util.algorithm.SortUtil; '~;vp
S :%SarhBD
/** *fg|HH+i
* @author treeroot BELxaV,
* @since 2006-2-2 SM1[)jZ-
* @version 1.0 r]lPXj(`
*/ 4!)=!sL;
public class ImprovedMergeSort implements SortUtil.Sort { 2oFbS%OV
o5`LLVif5y
private static final int THRESHOLD = 10; = k7}[!T
TL*8h7.(
/* oJ`cefcWo
* (non-Javadoc) ]^c]*O[8
* jc-$l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8AQ@?\Rc"2
*/ =lG/A[66
public void sort(int[] data) { {(j1#9+9
int[] temp=new int[data.length]; ,[{Z_co
mergeSort(data,temp,0,data.length-1); FdFN4{<QZ
} |xX>AMZc)D
zM+eb| >cr
private void mergeSort(int[] data, int[] temp, int l, int r) { o'auCa,N
int i, j, k; 4 /Q4sE~<
int mid = (l + r) / 2; ed:[^#Lj
if (l == r) nQ}$jOU&
return; rUOl+p_47
if ((mid - l) >= THRESHOLD) *CS2ndp
mergeSort(data, temp, l, mid); +204.Yj?D
else MF]EX
insertSort(data, l, mid - l + 1); ^mZeAW
if ((r - mid) > THRESHOLD) H(,D5y`k1
mergeSort(data, temp, mid + 1, r); V3t;V-Lkt
else F* h\#?
insertSort(data, mid + 1, r - mid); 9?L,DThQ
9Atnnx]n
for (i = l; i <= mid; i++) { NR|t~C+
temp = data; O=2SDuBZ
} l %M0^d6M
for (j = 1; j <= r - mid; j++) { h.WvPZ2U
temp[r - j + 1] = data[j + mid]; /hksESiU
} Z(0sMOaX
int a = temp[l]; GiGXV @dq
int b = temp[r]; .]D7Il
for (i = l, j = r, k = l; k <= r; k++) { #Rx|oSc}
if (a < b) { iwS55o
data[k] = temp[i++]; TeXt'G=M
a = temp; /lqVMlz\77
} else { n,vs(ZL:
data[k] = temp[j--]; ?X5Y8n]y\h
b = temp[j]; }=T=Z#OgH
} `iT{H]po
} v[J"/:]
} Yv ZcG3@c3
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/** I?Fv!5p
* @param data yG..B
* @param l <yw(7
* @param i K|^'`FpPO
*/ /@qnEP%
private void insertSort(int[] data, int start, int len) { 5kbbeO|0G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W<sa6,$
} (W'.vEl
} "2 "gTS
} ;(I')[R"
} ,UE>@;]
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堆排序： h qT6]*
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package org.rut.util.algorithm.support; :y%CP8
io{\+%;b~
import org.rut.util.algorithm.SortUtil; [:*Jn}
8AgKK=C=
/** kD.KZV
* @author treeroot bDq[j8IT6
* @since 2006-2-2 e$=UA%
* @version 1.0 PTZ/jg@71
*/ Z?"f#
public class HeapSort implements SortUtil.Sort{ 'PK;Fg\
|'ML )`c[
/* (non-Javadoc) Fx6]x$3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >xB[k-C4
*/ U?.cbB,
public void sort(int[] data) { Oll,;{<O
MaxHeap h=new MaxHeap(); TP R$oO2
h.init(data); f:hsE
for(int i=0;i h.remove(); wR]jJbF
System.arraycopy(h.queue,1,data,0,data.length); ?CU6RC n
} Ww)p&don
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private static class MaxHeap{ sfKu7puc
(Xv'Te?
void init(int[] data){ 4SDUTRoa
this.queue=new int[data.length+1]; S;L=W9=wby
for(int i=0;i queue[++size]=data; bpp{Z1/4
fixUp(size); tkjQSz
} 05PRlz*x=
} P~d&PhOe
x4=Sm0Ro|V
private int size=0; hw9qnSeRy
'h.:-1# L
private int[] queue; m(DJ6CSa
B3C%**~:e
public int get() { /;{E}`
return queue[1]; sDXD>upO
} Svqj@@_f
fWk,k*Z9
public void remove() { ta+MH,
SortUtil.swap(queue,1,size--); L5j%4BlK/
fixDown(1); p()#+Xy
} lC8Z@wkjO
file://fixdown 2>+(OL4l
private void fixDown(int k) { `G0GWh)`x
int j; T0TgV
while ((j = k << 1) <= size) { ~H4wsa39
if (j < size %26amp;%26amp; queue[j] j++; u/_TR;u=q
if (queue[k]>queue[j]) file://不用交换 ;vuqI5k
break; xmXuBp:M(R
SortUtil.swap(queue,j,k); O3KTKL]
k = j; 9Rd&Jq^
} =IH~:D\&
} @^cR
private void fixUp(int k) { ic;M=dsh:
while (k > 1) { l' mdj!{&
int j = k >> 1; Nbvs_>N
if (queue[j]>queue[k]) -~] q?k?
break; PX/7:D?
SortUtil.swap(queue,j,k); NXHe;G
k = j; u8Ak2:
} \`U=pZJ
} XT%\Ce!
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} /nWBol,
SUC'o"
} fvBL? x
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SortUtil： /N9ct4 {^
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package org.rut.util.algorithm; E! GH$%:;
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import org.rut.util.algorithm.support.BubbleSort; lx\9Y8
import org.rut.util.algorithm.support.HeapSort; q5xF~SQGw2
import org.rut.util.algorithm.support.ImprovedMergeSort; Us2IeR
import org.rut.util.algorithm.support.ImprovedQuickSort; >r\q6f#J4
import org.rut.util.algorithm.support.InsertSort; `F`{s`E)
import org.rut.util.algorithm.support.MergeSort; 8}K^o>J&K
import org.rut.util.algorithm.support.QuickSort; CuT50N;tk
import org.rut.util.algorithm.support.SelectionSort; 38#Zlcf
import org.rut.util.algorithm.support.ShellSort; 8_Nyy/K#F
572{DC&T
/** pv]2"|]V)
* @author treeroot 'W*:9wah
* @since 2006-2-2 l0w<NZF
* @version 1.0 ^_gH}~l+U
*/ #IR,KX3]A
public class SortUtil { %E2b{Y;
public final static int INSERT = 1; ~JQ6V?fucD
public final static int BUBBLE = 2; p|+TgOYOc
public final static int SELECTION = 3; $W]}m"l
public final static int SHELL = 4; 8+@j %l j
public final static int QUICK = 5; hQ ?zc_3
public final static int IMPROVED_QUICK = 6; fSF_O}kLp
public final static int MERGE = 7; gY&WH9sp?9
public final static int IMPROVED_MERGE = 8; s[bQO1g;*
public final static int HEAP = 9; \IaUsx"#o{
ZM16 ~k
public static void sort(int[] data) { XR_Gsb%l
sort(data, IMPROVED_QUICK); E?- ~*T
} HA74s':FN
private static String[] name={ 0[])wl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4<V}Aj8l
}; |*$0~mA
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private static Sort[] impl=new Sort[]{ H/U.Bg 4
new InsertSort(), v\o m
new BubbleSort(), ezb*tN!
new SelectionSort(), R-YNg
new ShellSort(), A<_{7F9
new QuickSort(), <?>tjCg'
new ImprovedQuickSort(), o~7D=d?R
new MergeSort(), Rt>mAU$}
new ImprovedMergeSort(), goe%'k,
new HeapSort() .*edaDi
}; +ib&6IU
(q@%eor&}
public static String toString(int algorithm){ hg2Ywzfm-
return name[algorithm-1]; [}HS[($
} ik#ti=.
H'+3<t>
public static void sort(int[] data, int algorithm) { d$^@$E2f
impl[algorithm-1].sort(data); y* :C~
} U@9v(TfV
&F:%y(;{Y
public static interface Sort { WjguM
public void sort(int[] data); @ZRg9M:N
} DwGRv:&HH
vmg[/#
public static void swap(int[] data, int i, int j) { nC(Lr,(
int temp = data; 2@W`OW Njm
data = data[j]; EU7nS3K)O~
data[j] = temp; +Sc2'z>R
} NL,6<ZOon,
} _Q'f^Kj