[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; Cs2hi,s
} .MoOjx?
int i1=l; t(<^of:
int i2=mid+1; K})=&<M0
for(int cur=l;cur<=r;cur++){ )SkJgzvC
if(i1==mid+1) bCv=Uo,+6
data[cur]=temp[i2++]; ;rBd_
else if(i2>r) a/})X[2
data[cur]=temp[i1++]; *,C[yg1P
else if(temp[i1] data[cur]=temp[i1++]; }b$?t7Q)
else e_eNtVq
data[cur]=temp[i2++]; @UbH;m
} cJ CKxj
} +ZuT\P&kR5
I+qg'mo
} qG=?+em
977%9z<h
改进后的归并排序: +Ce[OG.
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package org.rut.util.algorithm.support; 1|]IWX|
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import org.rut.util.algorithm.SortUtil; 1_AB;^
nC-=CMWWr
/** k,)xv?
* @author treeroot zWN/>~}U\
* @since 2006-2-2 $P=B66t ^
* @version 1.0 + F{hFuHV
*/ J%8M+!`F
public class ImprovedMergeSort implements SortUtil.Sort { 4CUoXs'
~&zrDj~FI
private static final int THRESHOLD = 10; MCPVql`+`q
}]dK26pX
/* ,r=9$i_
* (non-Javadoc) U8f!yXF'
* hW^*b:v{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YY!Lv:.7>
*/ [r[IWy(}
public void sort(int[] data) { ].=~C"s,a
int[] temp=new int[data.length]; #3b_#+,
mergeSort(data,temp,0,data.length-1); sj;n1t}$S
} <)hA?3J
.G ^-.p
private void mergeSort(int[] data, int[] temp, int l, int r) { 3YKJN4
int i, j, k; %l4;-x<e
int mid = (l + r) / 2; ^M:Y$9r_s
if (l == r) zmA]@'j
return; ~}lYp^~:J
if ((mid - l) >= THRESHOLD) {;z{U;j
mergeSort(data, temp, l, mid); JJIlR{WY_
else %anY'GK
insertSort(data, l, mid - l + 1); fU6O:-
if ((r - mid) > THRESHOLD) {Xw6]d
mergeSort(data, temp, mid + 1, r); {D6p?TL+
else 9.:]eL
insertSort(data, mid + 1, r - mid); &dH[lB
5Kadh2nz
for (i = l; i <= mid; i++) { & bKl(,
temp = data; $;4y2?E
} \ F\ /<
for (j = 1; j <= r - mid; j++) { &:>3tFQSH
temp[r - j + 1] = data[j + mid]; \?$`dA[
} O c[F
int a = temp[l]; (6y[,lYH
int b = temp[r]; uW%(ySbq
for (i = l, j = r, k = l; k <= r; k++) { li @:
if (a < b) { Qu x1N
data[k] = temp[i++]; m1 tYDZ"i
a = temp; ab}Kt($
} else { +:IwP
data[k] = temp[j--]; p\'0m0*
b = temp[j]; 6UAn#d9
} ;+Dq3NE
} |w{}h6a
} 2bs={p$}a
3jI rB%
/** >3C4S
* @param data {h}0"5
* @param l z[cs/x
* @param i c\Z.V*o
*/ Y94^mt-
private void insertSort(int[] data, int start, int len) { s~z~9#G(6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }&*wJ]j`L
} *(,zPn,
} { R`"Nk
} 'bd|Oww1u
} s|`ZV^R
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堆排序： =O1py_m
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package org.rut.util.algorithm.support; PM?F;mj
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import org.rut.util.algorithm.SortUtil; D<QE?:#
<dD)>Y.
/** r6b;v2!8
* @author treeroot cXd?48O
* @since 2006-2-2 ee}HQ.}Ja
* @version 1.0 ? PI2X.6
*/ }fV+Kd$CB
public class HeapSort implements SortUtil.Sort{ fi,h`mdT?
8v ZY+Q >
/* (non-Javadoc) ; u@& [
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t@;r~Sb
*/ 5r)]o'?s
public void sort(int[] data) { V JJ6q
MaxHeap h=new MaxHeap(); LmZ"_
h.init(data); Y'{F^VxA/
for(int i=0;i h.remove(); W"v"mjYud
System.arraycopy(h.queue,1,data,0,data.length); z@8W
} /$U<S"
tkX?iqKQ
private static class MaxHeap{ ,J4rKGG
W\pO`FL
void init(int[] data){ 4G_At
this.queue=new int[data.length+1]; 3FgTM(
for(int i=0;i queue[++size]=data; CX}==0od
fixUp(size); Q H57[Yg
} >Y6iLQ$X
} pQNTN.L9NZ
-<{;.~nI.
private int size=0; u85dG7
cuoZ:Wh
private int[] queue; 6ec#3~ Y]
>]}c,4D(
public int get() { 1PUeU+
return queue[1]; *DcB?8%
} rizWaw5E!8
Rn_FYP
public void remove() { Js'j}w
SortUtil.swap(queue,1,size--); tJvs ?eZ)
fixDown(1); #/0d
} O>3f*Cc
file://fixdown pGdFeEkB/
private void fixDown(int k) { "qdEu KI
int j; %F}i2!\<L
while ((j = k << 1) <= size) { l<)k`lrMX4
if (j < size %26amp;%26amp; queue[j] j++; od-yVE&
if (queue[k]>queue[j]) file://不用交换 2r"J"C
break; P^57a?[`
SortUtil.swap(queue,j,k); +pY--5t
k = j; tyU'[LF?
} ?p'DgL{
} w(oi6kg
private void fixUp(int k) { })yB2Q0
while (k > 1) { gLK_b;:
int j = k >> 1; ?J,K[.z
if (queue[j]>queue[k]) 045_0+r"@
break; 6qd?&.=r
SortUtil.swap(queue,j,k); ]S 3l' "
k = j; fZavZ\qU
} y#{v\h Cz
} isU4D
4ATIF;G'<
} [ 0z-X7=e
)?;+<,
} V [Wo9Y\
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SortUtil： J3XrlSc
M.9w_bW]#D
package org.rut.util.algorithm; %j/}e>$"Nk
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import org.rut.util.algorithm.support.BubbleSort; (>SucUU
import org.rut.util.algorithm.support.HeapSort; _P9*78
import org.rut.util.algorithm.support.ImprovedMergeSort; Wi@YJ
import org.rut.util.algorithm.support.ImprovedQuickSort; Vr:`?V9Q2(
import org.rut.util.algorithm.support.InsertSort; C@3UsD\s(
import org.rut.util.algorithm.support.MergeSort; $'n?V=4
import org.rut.util.algorithm.support.QuickSort; ]P>c{
import org.rut.util.algorithm.support.SelectionSort; /RI"a^&9A
import org.rut.util.algorithm.support.ShellSort; hrW2#v
1G8,Eah
/** l?B=5*0
* @author treeroot :n,x?bM
* @since 2006-2-2 U&W/Nj
* @version 1.0 snYyxi
*/ [nf5<
public class SortUtil { L:\>)6]Ls
public final static int INSERT = 1; CrB4%W:{
public final static int BUBBLE = 2; g&rz*)|/
public final static int SELECTION = 3; TPn#cIPG
public final static int SHELL = 4; PsM8J
public final static int QUICK = 5; 3qkPe_<I
public final static int IMPROVED_QUICK = 6; 9v/=o`J#
public final static int MERGE = 7; )|6OPR@(#/
public final static int IMPROVED_MERGE = 8; H.< F6
public final static int HEAP = 9; @RHG@{x{K
~3)d?{5
public static void sort(int[] data) { /\MkH\zg
sort(data, IMPROVED_QUICK); .=zBUvy
} lS]6SkZ6
private static String[] name={ /vI"v4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k8b5~A,
}; 0ev='v8?
av bup
private static Sort[] impl=new Sort[]{ j&[u$P*K
new InsertSort(), %c@PTpAM
new BubbleSort(), bwI"V&*
new SelectionSort(), +ryB*nT
new ShellSort(), M'VJE|+t
new QuickSort(), ZgfhNI\
new ImprovedQuickSort(), B'I_i$g4w
new MergeSort(), (duR1Dz
new ImprovedMergeSort(), kqjj&{vPFJ
new HeapSort() 3Ww 37V>h
}; s Fx0
.hJcK/m
public static String toString(int algorithm){ ]xGpN ]u
return name[algorithm-1]; niyI$OC
} <cxe
<cO `jK
public static void sort(int[] data, int algorithm) { cRE6/qrXGg
impl[algorithm-1].sort(data); %2\6.c=c
} b94+GLU8b
c-"vQ>ux+
public static interface Sort { = |E8z u%
public void sort(int[] data); \,#;gS"
} Qq%~e41ec
0mNL!"
public static void swap(int[] data, int i, int j) { N'CWSf.e
int temp = data; ' e %>Ip
data = data[j]; ~x^Ra8A
data[j] = temp; 9&{z?*
} Vha,rIi
} )q`.tsR>