[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; ag \d4y6
} Y=-ILN("
int i1=l; rW&#Xw/a
int i2=mid+1; ZO!
for(int cur=l;cur<=r;cur++){ ,*w
if(i1==mid+1) _P]!J~$5
data[cur]=temp[i2++]; ,& ^vc_}
else if(i2>r) xO<$xx
data[cur]=temp[i1++]; (3;dtp>Xx
else if(temp[i1] data[cur]=temp[i1++]; .}V&*-ep
else ,%a7sk<5k
data[cur]=temp[i2++]; hDf|9}/UQd
} ;C+g)BW
} $)fybnY
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} Wveba)"$
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改进后的归并排序: L`!M3c@u
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package org.rut.util.algorithm.support; ps*dO
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import org.rut.util.algorithm.SortUtil; clwJ+kku@
w|uO)/v
/** rq.S0bzH
* @author treeroot W"@FRWcd
* @since 2006-2-2 MGmUgc
* @version 1.0 E9yBa=#*c
*/ 3Q@HP;<
public class ImprovedMergeSort implements SortUtil.Sort { Q6|~ks+Y
q~K KN /N
private static final int THRESHOLD = 10; =c>w
guC7!P^
/* 4p%=8G|
* (non-Javadoc) rkW2_UTZE
* !w[io;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %!>~2=Q2*
*/ _Wjd`*
public void sort(int[] data) { p FkqDU
int[] temp=new int[data.length]; !QB(M@1
mergeSort(data,temp,0,data.length-1); 0H6^2T<
} 1{.=T&eG#
x\ pC&
private void mergeSort(int[] data, int[] temp, int l, int r) { v.ftfL!
int i, j, k; ,;2x.We
int mid = (l + r) / 2; J"x M[c2
if (l == r) x-e?94}^
return; RQ1`k,R=
if ((mid - l) >= THRESHOLD) Z!qHL$
mergeSort(data, temp, l, mid); i'Oh^Y)E#
else :.+?v*%;n
insertSort(data, l, mid - l + 1); aFj)s?$4]K
if ((r - mid) > THRESHOLD) BK_x5mGu3
mergeSort(data, temp, mid + 1, r); +Y^_1
else (v\Cv)OS
insertSort(data, mid + 1, r - mid); B`/cKfg
a09]5>*
for (i = l; i <= mid; i++) { -cjwa-9 ~
temp = data; Ikkv <uY
} Y68T&swD
for (j = 1; j <= r - mid; j++) { =DhzV D
temp[r - j + 1] = data[j + mid]; |Q'l&Gt6
} @Ik@1
int a = temp[l]; 4}~zVT0'~
int b = temp[r]; }/%(7Ff{
for (i = l, j = r, k = l; k <= r; k++) { ^}-(8~_en
if (a < b) { {ER%r'(4Z
data[k] = temp[i++]; QX*HvT
a = temp; DJtKLG0
} else { ;(kU:b|j
data[k] = temp[j--]; l+>&-lX'
b = temp[j]; ?T\m V}
} l"\W]'T:r
} \gh`PS-B
} %EZG2JjO)
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/** !~{AF|2f
* @param data .Jt&6N
* @param l =Of!1TR(
* @param i *N0R3da
*/ 9M)N2+hkZ
private void insertSort(int[] data, int start, int len) { Fn8d;%C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); );^] is~
} GHMoT
} "G8w}n:y
} !,*#e
} ~$0Qvyb>
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堆排序： rKDMIECrm
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package org.rut.util.algorithm.support; f3 lKdXnP
;P-xKRU!Xx
import org.rut.util.algorithm.SortUtil; yK +&1U2`
J^@0Ff;=5^
/** EV:y}
* @author treeroot lg0iNc!
* @since 2006-2-2 ,3k"J4|d
* @version 1.0 8 0>qqz
*/ e,_b
public class HeapSort implements SortUtil.Sort{ vG'JMzAm
g+ik`q(ge
/* (non-Javadoc) W9{>.E?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F<y5zqGy@
*/ ELp @/c=Wr
public void sort(int[] data) { 2WjQ-mM#
MaxHeap h=new MaxHeap(); xGQ958@
h.init(data); MorR&K
for(int i=0;i h.remove(); D?u*^?a2
System.arraycopy(h.queue,1,data,0,data.length); .)W'{2J-
} lc%2Pi[X
Azrc+k
private static class MaxHeap{ P`'Nv
Nb[z+V{=
void init(int[] data){ 4c2*)x$@
this.queue=new int[data.length+1]; =kq!e
for(int i=0;i queue[++size]=data; qA<PF+f
fixUp(size); ;r[@;2p*(
} jXO*_R
} -WIT0F4o;
M"OXNPkc
private int size=0; {89F*
R{~Yh.)~
private int[] queue; T!uK_
fiSc\C~
public int get() { cvpcadN[
return queue[1]; E3#}:6m
} )MFa~/x
~n#rATbxf
public void remove() { W@w#A]
SortUtil.swap(queue,1,size--); o$4n D#P3
fixDown(1); L Ty[)
} %,rUN+vW
file://fixdown t)74(
private void fixDown(int k) { Oo<^~d2=
int j; r"OVu~ND
while ((j = k << 1) <= size) { *yqEl O
if (j < size %26amp;%26amp; queue[j] j++; [X.sCl|
if (queue[k]>queue[j]) file://不用交换 DfFsCTu
break; L&F0^
SortUtil.swap(queue,j,k); -I.OvzQ*
k = j; #/ 1
} 5taYm'
} pHlw&8(f"
private void fixUp(int k) { Nhv~f0
while (k > 1) { 7p&%0'BO1z
int j = k >> 1; J7BfH,o
if (queue[j]>queue[k]) Ij hC@5qk
break; DCv~^
SortUtil.swap(queue,j,k); 0+b1R}!2
k = j; C8%Iol
} 83UIH0(
} d-g&TSGd
2H8,&lY.p
} xX`P-h>V`c
2{zFO3i<3
} |q5R5mQ
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SortUtil： &[}T41
n83,MV?-
package org.rut.util.algorithm; }E+}\&
>ZKE
import org.rut.util.algorithm.support.BubbleSort; yz!j9pJ
import org.rut.util.algorithm.support.HeapSort; IiV:bHUE}0
import org.rut.util.algorithm.support.ImprovedMergeSort; p%_#"dkC7
import org.rut.util.algorithm.support.ImprovedQuickSort; ]R/VE"-
import org.rut.util.algorithm.support.InsertSort; 6X5`npf
import org.rut.util.algorithm.support.MergeSort; Hd6g0
import org.rut.util.algorithm.support.QuickSort; ["}0umt
import org.rut.util.algorithm.support.SelectionSort; R=~+-^O!
import org.rut.util.algorithm.support.ShellSort; U]lXw+&
DQ^yqBVgQ
/** oJy]n9
* @author treeroot [^B04x@
* @since 2006-2-2 _ 97
* @version 1.0 w?A&XB+
*/ yzt6
public class SortUtil { |D u.aN
public final static int INSERT = 1; Q>u$tLX&
public final static int BUBBLE = 2; 4(MZ*6G]?
public final static int SELECTION = 3; r#wMd9])
public final static int SHELL = 4; !']=7It{
public final static int QUICK = 5; l9XK;0R9
public final static int IMPROVED_QUICK = 6; s.]7c CY
public final static int MERGE = 7; }!b9L]
public final static int IMPROVED_MERGE = 8; |l(rR06#.]
public final static int HEAP = 9; 2xH9O{
Ob2H7!
public static void sort(int[] data) { Af5O;v\
sort(data, IMPROVED_QUICK); zlIXia5
} dL'hC#!h
private static String[] name={ IB:Wh;_x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pb_+_(/c
}; TOV531
{~ ZSqd
private static Sort[] impl=new Sort[]{ FLJdnL
new InsertSort(), u1O?`
new BubbleSort(), E~]8>U?V
new SelectionSort(), ^HumyDD6
new ShellSort(), P&C,EE$
new QuickSort(), E^_P
new ImprovedQuickSort(), x]lv:m\)jT
new MergeSort(), w1EYXe
new ImprovedMergeSort(), S P)$K=
new HeapSort() B\1F
}; _H(m4~M
orCD?vlh
public static String toString(int algorithm){ l@nkR&4[
return name[algorithm-1]; Ok[y3S
} j8nG Gx
)nyud$9w'
public static void sort(int[] data, int algorithm) { $A)i}M;uK
impl[algorithm-1].sort(data); w~QUG^0Fx
} 7%L%dyN
lq=|=
public static interface Sort { >l{<p(
public void sort(int[] data); h|"98PI
} cAIMt]_
ZurQr}
public static void swap(int[] data, int i, int j) { 4]RGLN
int temp = data; D`PnY&ffT
data = data[j]; EAp6IhW{
data[j] = temp; :\x53-&hO4
} ;LNFPo
} Ath^UKO"