[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; }yC,uEV
} G'}_ZUy#
int i1=l; e[k;SSs
int i2=mid+1; v8fZ?dx
for(int cur=l;cur<=r;cur++){ r;6YCI=z
if(i1==mid+1) |s3HeY+Co
data[cur]=temp[i2++]; iN9!?Ov_
else if(i2>r) 7!yF5+_d
data[cur]=temp[i1++]; \3:{LOr%*
else if(temp[i1] data[cur]=temp[i1++]; Z FrXw+
else wM&x8 <
data[cur]=temp[i2++]; d<cbp[3F
} vheAh`u^&
} .LTFa.jxA
R^O)fL0_
} 0@/E%T1c"
BRok 89
改进后的归并排序: :)V0zHo&(
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package org.rut.util.algorithm.support; ib=^tK
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import org.rut.util.algorithm.SortUtil; vFvu8*0
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/** 4y}a,
* @author treeroot G@I_6cE
* @since 2006-2-2 Pc ?G^ Xol
* @version 1.0 v5bb|o[{K
*/ ]~ 8N
public class ImprovedMergeSort implements SortUtil.Sort { Mw7UU1 ei
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private static final int THRESHOLD = 10; iwTBE]J
#w?%&,Kp
/* o|n0?bThS-
* (non-Javadoc) LUVJ218p
* eS%6hUb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `e;Sjf<
*/ ^aM/BS\
public void sort(int[] data) { #K*q(ei,7h
int[] temp=new int[data.length]; 0$h$7'a
mergeSort(data,temp,0,data.length-1); w3|.4hS
} DmA!+
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private void mergeSort(int[] data, int[] temp, int l, int r) { >oYwzK0&
int i, j, k; -ns a3P
int mid = (l + r) / 2; F88SV6
if (l == r) mNB ]e5;N
return; Y$5v3E\uc
if ((mid - l) >= THRESHOLD) sWzXl~JbF
mergeSort(data, temp, l, mid); SL5DWZ
else TK?N^ly
insertSort(data, l, mid - l + 1); @?AE75E{
if ((r - mid) > THRESHOLD) aL6 5t\2
mergeSort(data, temp, mid + 1, r); >a~FSZf
else 7ib<Cb>K
insertSort(data, mid + 1, r - mid); `.Q3s?1F
zq>"a&Y,
for (i = l; i <= mid; i++) { J-?(sjIX
temp = data; WZ-{K"56
} *njB fH'
for (j = 1; j <= r - mid; j++) { `erQp0fBM
temp[r - j + 1] = data[j + mid]; e';c8WF3E
} :iiTz$yk
int a = temp[l]; hpKc_|un
int b = temp[r]; itMc!bUQ
for (i = l, j = r, k = l; k <= r; k++) { iJ#oI@s
if (a < b) { Rzj!~`&N
data[k] = temp[i++]; I=I%e3GEm
a = temp; K`2DhJC
} else { G?(:Z=
data[k] = temp[j--]; .b)(_*
b = temp[j]; $l"(tB7d
} $\H46Ji
} 'v)+S;oB
} r{;4(3E2
@2O\M ,g5
/** \dbtdhT;Z
* @param data ;!Bkk9r"H
* @param l }Ec"&
* @param i >u[ln@ l
*/ 2l%iXK[
private void insertSort(int[] data, int start, int len) { P3>2=qK"E(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uf3 gVS_h=
} >qZRIDE5$
} EFOQ;q
} NE nP3A
} yU`IyaazZ
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堆排序： Fm{y.URo
1 crjRbi
package org.rut.util.algorithm.support; |a3b2x,
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import org.rut.util.algorithm.SortUtil; 69L&H!<i:
SS-
/** yV`vu/3K
* @author treeroot 4 .qjTR
* @since 2006-2-2 > [7vXm4
* @version 1.0 9`b3=&i\
*/ nQC[[G*x
public class HeapSort implements SortUtil.Sort{ :W55JD'
Su^Z{ Ud`
/* (non-Javadoc) CQ ?|=cN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B5S1F4
*/ ~A( Pa-
public void sort(int[] data) { U)6JJv
MaxHeap h=new MaxHeap(); W3kilhZ
h.init(data); H2p;J#cv@
for(int i=0;i h.remove(); iBt5aUt
System.arraycopy(h.queue,1,data,0,data.length); Bf'(JJ7&N
} Orgje@c{
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private static class MaxHeap{ v4Gkf
e V#H"fM
void init(int[] data){ p-_j0zv
this.queue=new int[data.length+1]; ]a()siT
for(int i=0;i queue[++size]=data; *G38N]|u6
fixUp(size); x(Z@R\C-a
} k5/}S@F8
} "`wq:$R
?T&D@Ohsx
private int size=0; c@P,
]0O$2j_7
private int[] queue; &-9D.'WzP
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public int get() { <dZ{E7l
return queue[1]; O_q_O
} 4+0Zj+ q";
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public void remove() { -K{ID$!p
SortUtil.swap(queue,1,size--); 0 N(2[s_A
fixDown(1); 6lGL.m'Ra
} &+sN=J.x
file://fixdown 4KKNw9L)
private void fixDown(int k) { hG U &C]
int j; JqO( ]*"Hi
while ((j = k << 1) <= size) { f$/D?q3N
if (j < size %26amp;%26amp; queue[j] j++; >X]<s^
if (queue[k]>queue[j]) file://不用交换 iT5%X
break; bP[/
SortUtil.swap(queue,j,k); @NF8?>!
k = j; W~qo `r
} pfG:PrZ
} fHiCuF
private void fixUp(int k) { H0S7k`.
while (k > 1) { E_z@\z MB
int j = k >> 1; XpGom;z^c
if (queue[j]>queue[k]) #KwFrlZ
break; (0S"ZT
SortUtil.swap(queue,j,k); mMR[(
k = j; Q'N<jX[
} w?[)nlNW
} mnePm{
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} T'XRl@
-%A6eRShk
} >2rFURcD
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SortUtil： tnsYY
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package org.rut.util.algorithm; ~ M"[FYw[
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import org.rut.util.algorithm.support.BubbleSort; HTC7fS
import org.rut.util.algorithm.support.HeapSort; ?E`J-ncP
import org.rut.util.algorithm.support.ImprovedMergeSort; |^=`ln!
import org.rut.util.algorithm.support.ImprovedQuickSort; mb#)w`<
import org.rut.util.algorithm.support.InsertSort; 67e1Y@Xu
import org.rut.util.algorithm.support.MergeSort; i-Z@6\/a5
import org.rut.util.algorithm.support.QuickSort; b`2~
import org.rut.util.algorithm.support.SelectionSort; 6O"0?wG+
import org.rut.util.algorithm.support.ShellSort; rScmUt
0-5:"SN'
/** H;^6%HV1
* @author treeroot TiOvrp7B
* @since 2006-2-2 BKIt,7j
* @version 1.0 6V8"[0U
*/ rnW i<Se
public class SortUtil { NENbr$,G
public final static int INSERT = 1; Awj`6GeJ
public final static int BUBBLE = 2; 'HC4Q{b`
public final static int SELECTION = 3; -0W;b"]+A
public final static int SHELL = 4; 4-TM3Cw`d&
public final static int QUICK = 5; |h3YL!
public final static int IMPROVED_QUICK = 6; {U4%aoBd8
public final static int MERGE = 7; /q>"">
public final static int IMPROVED_MERGE = 8; |OC6yN *P)
public final static int HEAP = 9; shi#K<gVC
/ og'W j
public static void sort(int[] data) { M]&9Kg3
sort(data, IMPROVED_QUICK); ]-O:|q>]
} vX{]_
private static String[] name={ <EE)d@%>v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e]rWR
}; S]<Hx_[}
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private static Sort[] impl=new Sort[]{ U*6r".sz
new InsertSort(), UCl,sn
new BubbleSort(), U#Ud~Q q
new SelectionSort(), N~a?0x
new ShellSort(), M[X& Q
new QuickSort(), nY6^DE2f
new ImprovedQuickSort(), @P%&Dha
new MergeSort(), FzNs >*
new ImprovedMergeSort(), M*t{?o/t;
new HeapSort() c(@)V.o2
}; s:Memvf
r;9F@/
public static String toString(int algorithm){ $oh}!Smt
return name[algorithm-1]; t,&1~_9
} w,^!kO0)~8
?-6oh~W<
public static void sort(int[] data, int algorithm) { f 1]1ZOb
impl[algorithm-1].sort(data); =n9|r.\&uJ
} h_H$+!Nzb
n&&X{Rl
public static interface Sort { )Wgh5C`
public void sort(int[] data); X+iUT
} @<l7"y;\
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public static void swap(int[] data, int i, int j) { q*52|?
int temp = data; *_@8v?
data = data[j]; ?oP<sGp
data[j] = temp; `O*+%/(
} SxH b76 ;
} OTSbhI'v