[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; dr o42#$Mo
} )frtvN7
int i1=l; A9gl|II
int i2=mid+1; iz(+(M
for(int cur=l;cur<=r;cur++){ '3VrHL@@g
if(i1==mid+1) 9E+lriyY
data[cur]=temp[i2++]; uzsN#'7=
else if(i2>r) ;4IP7$3G
data[cur]=temp[i1++]; c[$oR,2b13
else if(temp[i1] data[cur]=temp[i1++]; L\[jafb_`
else =Yk$Q\c
data[cur]=temp[i2++]; j@2 hI,+
} FzIA>njt
} &Te:l-x
0l6%[U?o
} ]Y?$[+Y
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改进后的归并排序: C*!_. <b
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package org.rut.util.algorithm.support; 5UbVg
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import org.rut.util.algorithm.SortUtil; KI{u:Lbi
hl+Yr)0\
/** 5\J;EWTU
* @author treeroot oSoG&4
* @since 2006-2-2 K\q/JuDfc
* @version 1.0 4hs4W,2!
*/ SccU@3.X~
public class ImprovedMergeSort implements SortUtil.Sort { ?*;zS%93U9
49m/UeNZ
private static final int THRESHOLD = 10; GFidriC
Ft}tIP7
/* j; C(:6#J
* (non-Javadoc) I}=}S"v
* Q8n?7JB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UPC& O
*/ K&*FI (a
public void sort(int[] data) { 1jyWP#M#
int[] temp=new int[data.length]; r4sR5p]|
mergeSort(data,temp,0,data.length-1); 8z-Td-R6
} 83a Rq&(R
u=[oo@Rk`
private void mergeSort(int[] data, int[] temp, int l, int r) { (2(hl--'n
int i, j, k; h:;~)={"X
int mid = (l + r) / 2; Ub$$wOsf
if (l == r) h4#5j'RO
return; vIJdl2(^E
if ((mid - l) >= THRESHOLD) -*EJj>x
mergeSort(data, temp, l, mid); 1\p[mN
else zSO[f
insertSort(data, l, mid - l + 1); ZS-9|EA<
if ((r - mid) > THRESHOLD) |&JL6hN
mergeSort(data, temp, mid + 1, r); i469<^A
else f19 i !
insertSort(data, mid + 1, r - mid); SYL$?kl
UnPSJ]VW
for (i = l; i <= mid; i++) { "J9+~)e^!
temp = data; SXL6)pX
} KK+Mxoj,
for (j = 1; j <= r - mid; j++) { 0-9&d(L1g
temp[r - j + 1] = data[j + mid]; s$en5)
} /t$rX3A
int a = temp[l]; &|/vM.
int b = temp[r]; w>v5oy8s-
for (i = l, j = r, k = l; k <= r; k++) { D35m5+=I
if (a < b) { TRSOO}
data[k] = temp[i++]; h^['rmd
a = temp; ;rNd701p"
} else { `!zQ
data[k] = temp[j--]; n)tU9@4Np
b = temp[j]; ;JAK[o8i
} i B%XBR
} dj3|f{kg{
} &K06}[J
j?=VtVP
/** H9sZR>(^
* @param data $b4*/vMr
* @param l cE^kpnVq|<
* @param i n49;Z,[~
*/ ?x:m;z/
private void insertSort(int[] data, int start, int len) { _i-\mR_~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k&OC&
} l<$rqz3D
} D`V6&_.p
} +z+F-
} !{$qMhT
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堆排序： sjSi;S4
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package org.rut.util.algorithm.support; '-`O. 4u
|drf"lX<{
import org.rut.util.algorithm.SortUtil; R'Sa?6xS4
R_maNfS]Z
/** 1d`cTaQ-
* @author treeroot K-Re"zsz
* @since 2006-2-2 8098y,mQe
* @version 1.0 bi+9R-=&
*/ KCE=|*6::|
public class HeapSort implements SortUtil.Sort{ HB%K|&!+
QQ*gFP.Ao
/* (non-Javadoc) 6j_ 678
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B i'd5B5
*/ {&E?<D2_&
public void sort(int[] data) { wc"9A~
MaxHeap h=new MaxHeap(); E\ tL
h.init(data); Z?-;.G*
for(int i=0;i h.remove(); [9LxhPi
System.arraycopy(h.queue,1,data,0,data.length); 8IeI0f"l)
} '[%jjUU
B<Ol+)@,}
private static class MaxHeap{ qbH%Hx
U4]30B{;H
void init(int[] data){ I<sfN'FpT
this.queue=new int[data.length+1]; TFo}\B7
for(int i=0;i queue[++size]=data; )GK+
fixUp(size); lBS"3s384
} g#w`J\iz
} s}s|~
k<!<<,Z
private int size=0; )u<eO FI+
lHcA j{6
private int[] queue; <&`:&7
JT}.F!q6E
public int get() { xg?auje
return queue[1]; }*h47t}
} V- /YNRV
kY=rz&?U
public void remove() { }4Zkf<#7$
SortUtil.swap(queue,1,size--); f`,-b
fixDown(1); 2R\+}
} 7"#f!.E
file://fixdown lVP |W:~K
private void fixDown(int k) { &m'?*O |
int j; v_.HGGS
while ((j = k << 1) <= size) { 0JK2%%
if (j < size %26amp;%26amp; queue[j] j++; +N7"EROc
if (queue[k]>queue[j]) file://不用交换 w~]T<^fW~
break; @' d6iYk_
SortUtil.swap(queue,j,k); "sD1T3!\)Q
k = j; )Z("O[
} p=H3Q?HJ}
} s"q=2i
private void fixUp(int k) { d @m\f
while (k > 1) { bf1)M>g,O
int j = k >> 1; 7 I@";d8~
if (queue[j]>queue[k]) G?R_aPP
break; ,[Ag~.T
SortUtil.swap(queue,j,k); 1&|
k = j; P8<hvMF
} f9a$$nb3`
} RtwUb(wn6
|U EC
} "-P/jk
f}2;N
} Je 31".
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SortUtil： WtVf wC_
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package org.rut.util.algorithm; Dm^l?Z
#~S>K3(
import org.rut.util.algorithm.support.BubbleSort; 6Kp}_^|z
import org.rut.util.algorithm.support.HeapSort; Ev{MCu1!6
import org.rut.util.algorithm.support.ImprovedMergeSort; ] opto
import org.rut.util.algorithm.support.ImprovedQuickSort; &atyDFJ'
import org.rut.util.algorithm.support.InsertSort; Q(e{~ ]*
import org.rut.util.algorithm.support.MergeSort; (xu=%
import org.rut.util.algorithm.support.QuickSort; eIJ[0c b}
import org.rut.util.algorithm.support.SelectionSort; |kc@L`7s
import org.rut.util.algorithm.support.ShellSort; Wxn#Rk#>
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/** Z%OW5]q
* @author treeroot b)`pZiQP
* @since 2006-2-2 >Mw'eQ0(y
* @version 1.0 }vY.EEy!
*/ t!:)L+$3
public class SortUtil { o0l74
public final static int INSERT = 1; yPN+W8}f
public final static int BUBBLE = 2; "Vy WT
public final static int SELECTION = 3; l sr?b
public final static int SHELL = 4; +(&|uq^
public final static int QUICK = 5; XhN{S]Wn
public final static int IMPROVED_QUICK = 6; </=3g>9Z
public final static int MERGE = 7; 5{X*a
public final static int IMPROVED_MERGE = 8; IJ_ m
public final static int HEAP = 9; m]P/if7
d8o ewkiR
public static void sort(int[] data) { M*(H)i;s:w
sort(data, IMPROVED_QUICK); \7 Gz\=\LR
} 1O0X-C,wo$
private static String[] name={ 8#l+{`$z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /?P!.!W&
}; K{2h9 ]VF
#)]E8=}
private static Sort[] impl=new Sort[]{ j8a[ (
new InsertSort(), g YUTt
new BubbleSort(), 7 >bMzdH
new SelectionSort(), $w/E9EJ)3A
new ShellSort(), mX;H((
new QuickSort(), Cfv]VQQE
new ImprovedQuickSort(), En\Z#0,V
new MergeSort(), 8kH<$9
new ImprovedMergeSort(), 3+V#[JBJv
new HeapSort() `[Sl1saZ$S
}; $@.jZ_G
i?-Y
public static String toString(int algorithm){ =?/&u<
return name[algorithm-1]; ISBF\ wQY
} (:7a&2/M
!^?qU;|
public static void sort(int[] data, int algorithm) { RG1\=J$:E
impl[algorithm-1].sort(data); CmHyAw(
} `{o$F ::(
RG}}Oh="v
public static interface Sort { ,H{={aln
public void sort(int[] data); d}+W"j;
} QNpuTZn#Q
bLlH//ZRH
public static void swap(int[] data, int i, int j) { (NaK3_
int temp = data; 7&|6KN}c
data = data[j]; <u0,Fp
data[j] = temp; eGvOA\y:
} :tbd,Uo
} 2(+P[(N1,