[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:C|
} @oA0{&G{
int i1=l; ,aYU$~o#
int i2=mid+1; 0ZT 0
for(int cur=l;cur<=r;cur++){ Jbkt'Z(&J
if(i1==mid+1) W\a!Q]pV
data[cur]=temp[i2++]; 6,3}/hgWJ$
else if(i2>r) x36NL^
data[cur]=temp[i1++]; T#Fn:6_=
else if(temp[i1] data[cur]=temp[i1++]; Yim#Pq&_
else mMslWe
data[cur]=temp[i2++]; fxOE]d8v
} lnjL7x
} `L;OY 4
Bjtj{B
} ifd}]UMQ
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改进后的归并排序: h%/ssB
#9INX`s-
package org.rut.util.algorithm.support; >waN;&>/
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import org.rut.util.algorithm.SortUtil; .h a`)@MsZ
M-vC>u3Y
/** bbO+%-(X
* @author treeroot wyNC|P;j$g
* @since 2006-2-2 =}"R5
* @version 1.0 "W3W:vl!
*/ 3 ^pYCK%
public class ImprovedMergeSort implements SortUtil.Sort { :K:f^o]s
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private static final int THRESHOLD = 10; .dt#2a_5q
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/* u9 %;{:]h
* (non-Javadoc) 3m3 EXz
* F],TG&>5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d`UF0T
*/ > Z]P]e
public void sort(int[] data) { #*+;B93)
int[] temp=new int[data.length]; gfxoJihE
mergeSort(data,temp,0,data.length-1); ,R8n,az
} l,^xX=,
R2SBhs,+R
private void mergeSort(int[] data, int[] temp, int l, int r) { 3V"dG1?
int i, j, k; ^z38<L=z"
int mid = (l + r) / 2; zv`zsqDJ
if (l == r) CJ0$;et
return; nhp)yW
if ((mid - l) >= THRESHOLD) n}+wd9J*!2
mergeSort(data, temp, l, mid); ?-4OfGN
else 2$iw/r
insertSort(data, l, mid - l + 1); QZ#3Bn%B5
if ((r - mid) > THRESHOLD) :l4^iSf
mergeSort(data, temp, mid + 1, r); ysL0hwir
else s87 a%
insertSort(data, mid + 1, r - mid); 33O)k*g
f(^33k
for (i = l; i <= mid; i++) { i'U,S`L6>
temp = data; PnI)n=(\
} zI1(F67d`
for (j = 1; j <= r - mid; j++) { G,+xT}@wu
temp[r - j + 1] = data[j + mid]; N'I?fWN!;R
} PQ6T|>
int a = temp[l]; r$94J'_
int b = temp[r]; }{P&idkv
for (i = l, j = r, k = l; k <= r; k++) { _F! :(@}
if (a < b) { vM5k4%D
data[k] = temp[i++]; (H'_KPK
a = temp; GOUY_&}tL
} else { =;kRk.qzy
data[k] = temp[j--]; i:MlD5 F
b = temp[j]; lkI8{
} [^h/(a`
} "tqS|ok.
} unx;m$-c
3S;>ki4(0
/** :8GlyN<E
* @param data E=$7ieW
* @param l 8[vl3C
* @param i u!hqq^1
*/ Bidqf7v
private void insertSort(int[] data, int start, int len) { 6(\q< fx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B.{8/.4
} l_UXrnm/N
} rOs)B21/
} $0S.@wUG
} e{c._zr,
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堆排序： U{j5kX
;4+qPWwq8W
package org.rut.util.algorithm.support; ]H@v
L&+% Wd~
import org.rut.util.algorithm.SortUtil; 1"mnzbf8*
AaJ,=eQ
/** @SX%? mk8G
* @author treeroot iuvtj]/
* @since 2006-2-2 A}az m>
* @version 1.0 d,Im&j_Z
*/ !~6'@UYo
public class HeapSort implements SortUtil.Sort{ z:0-aDeM
$}^Rsv(
/* (non-Javadoc) m0dFA<5-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gt].rwo"
*/ }dV9%0s!
public void sort(int[] data) { ctnAVm
MaxHeap h=new MaxHeap(); \9&YV;Ct
h.init(data); I^rZgp<'i
for(int i=0;i h.remove(); 6)tB{:h&~0
System.arraycopy(h.queue,1,data,0,data.length); YzforM^F
} (ouRf;\6$8
FCS5@l,'<
private static class MaxHeap{ U'f$YVc
wa-_O<
void init(int[] data){ o3kt0NuF,
this.queue=new int[data.length+1]; NgDZ4&L
for(int i=0;i queue[++size]=data; eLe,=
fixUp(size); 75QXkJu
} [|c@Yw
} j]cXLY
A8A:@-e8A
private int size=0; 8`R +y
D}k-2RM2k
private int[] queue; '#pMEVP
iA1;k*)q
public int get() { W(]E04
return queue[1]; MpDdJ,
} a:(: :m
"(HA9:
public void remove() { |wyJh"4!
SortUtil.swap(queue,1,size--); ba1$kU
fixDown(1); Ppi-skT
} q9g[+*9]$
file://fixdown V'f&JQA
private void fixDown(int k) { rU2YMghE
int j; R &1mo
while ((j = k << 1) <= size) { [~Z'xY y
if (j < size %26amp;%26amp; queue[j] j++; Lk8W&|;0|
if (queue[k]>queue[j]) file://不用交换 hPEp0("
break; <IHFD^3|j
SortUtil.swap(queue,j,k); i+qLc6|S=2
k = j; 1DI"LIL
} R9|2&pfm(M
} 3_R
private void fixUp(int k) { c:`` Y:
while (k > 1) { X+'^Sp
int j = k >> 1; lN][xnP
if (queue[j]>queue[k]) ^J*G%*
break; o\=i0HR9
SortUtil.swap(queue,j,k); ib""Fv7{
k = j; q|Pt>4c5?
} eD` ,
} f2SU5e2
%FR^[H]
} qD=m{O8%_
-KU)7V
} 3_jCsX
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SortUtil： _L `N^I.
[Q.4]K2
package org.rut.util.algorithm; a|6x!p2X
Te U7W?M^
import org.rut.util.algorithm.support.BubbleSort; r%m7YwXo
import org.rut.util.algorithm.support.HeapSort; kS\.
import org.rut.util.algorithm.support.ImprovedMergeSort; 4,*^QK
import org.rut.util.algorithm.support.ImprovedQuickSort; bN7UO
import org.rut.util.algorithm.support.InsertSort; aJa^~*N/Aa
import org.rut.util.algorithm.support.MergeSort; h3;o!FF
import org.rut.util.algorithm.support.QuickSort; H-\{w
import org.rut.util.algorithm.support.SelectionSort; >`rNT|rg
import org.rut.util.algorithm.support.ShellSort; 5E oWyy
+=B}R
/** sP3.s_U^
* @author treeroot !>Qc2&ZV
* @since 2006-2-2 vxilQp
* @version 1.0 L->f= 8L
*/ 6E\\`FE4y
public class SortUtil { ek;&<Z_ ]
public final static int INSERT = 1; BJ.8OU*9]S
public final static int BUBBLE = 2; h<^:Nn
public final static int SELECTION = 3; U<,Kw6K
public final static int SHELL = 4; ,Q /nS$
public final static int QUICK = 5; $bi_i|?
public final static int IMPROVED_QUICK = 6; D@4&@>
public final static int MERGE = 7; ~b6<uRnM.
public final static int IMPROVED_MERGE = 8; kvgs $
public final static int HEAP = 9; Y+_5"LV
fj t_9-.
public static void sort(int[] data) { ^]lwd"$
sort(data, IMPROVED_QUICK); %3l;bR>
} ^Mvsq)
private static String[] name={ 1f pS"_}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D8D!16_
}; +^&v5[$R
T m@1q!G
private static Sort[] impl=new Sort[]{ 3}#XA+Z
new InsertSort(), b[[6X
new BubbleSort(), ;iC'{S
new SelectionSort(), PVkN3J
new ShellSort(), (P>eWw\0
new QuickSort(), o"ah\"#el
new ImprovedQuickSort(), ~ Dp:j*H
new MergeSort(), :rs\ydDUF
new ImprovedMergeSort(), `j!2uRFe>
new HeapSort() >K|GLP
}; 1={Tcq\]
4(0t GF
public static String toString(int algorithm){ iZq@W3GL C
return name[algorithm-1]; _l{5'm
} R;TEtu7
548[!p4
public static void sort(int[] data, int algorithm) { 3P^gP32
impl[algorithm-1].sort(data); )x:j5{>(
} tj^:SW.0
};|PFWs
public static interface Sort { 5 *pN<S
public void sort(int[] data); %`\_l
} mv%:[+!
,pa&he
public static void swap(int[] data, int i, int j) { |Q)w3\S$
int temp = data; t-4R7`A<
data = data[j]; JJHvj=9'o
data[j] = temp; %Rsf6rJ
} =Wy`X0h
} ! 7*_Z=