[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; KL8G2"Z
} t@`w}o[#
int i1=l; S<f]Y4A&
int i2=mid+1; 8<Y*@1*j
for(int cur=l;cur<=r;cur++){ ]}wo$7pO
if(i1==mid+1) `n*e8T
data[cur]=temp[i2++]; u]W$'MyY
else if(i2>r) H+oQ L(i|_
data[cur]=temp[i1++]; O]>FNsh!
else if(temp[i1] data[cur]=temp[i1++]; Qd %U(|
else ,co~@a@9
data[cur]=temp[i2++]; }-ly'4=l
} mM> L0
} 4pin\ZS:C
DHUK_#!
} < )dqv0=
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改进后的归并排序: d-zNvbU"
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package org.rut.util.algorithm.support; /E/Z0<l7
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import org.rut.util.algorithm.SortUtil; )(?,1>k`Z
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/** ;.O#|Z[
* @author treeroot r9nyEzk
* @since 2006-2-2 lo1<t<w`
* @version 1.0 4jOq.j
*/ #%~PNki
public class ImprovedMergeSort implements SortUtil.Sort { D%=VhKq
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private static final int THRESHOLD = 10; ;;^OKrzWW
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/* u<VR;p:y
* (non-Javadoc) :>:F6Db"U
* FO"sE`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V0rS^SAF
*/ ^\ N@qL
public void sort(int[] data) { x1@`\r#0
int[] temp=new int[data.length]; .T2P%Jn.
mergeSort(data,temp,0,data.length-1); MO_-7,.y
} m-<"`:+
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private void mergeSort(int[] data, int[] temp, int l, int r) { 8|z@"b l)
int i, j, k; 1}7Q2Ad w
int mid = (l + r) / 2; TrYt(F{t
if (l == r) W Ai91K@
return; T3_3k.,|
if ((mid - l) >= THRESHOLD) S'h{["P~ 0
mergeSort(data, temp, l, mid); A-&'/IHR"B
else m0}1P]dc
insertSort(data, l, mid - l + 1); TtWE:xE
if ((r - mid) > THRESHOLD) fn~Jc~[G|
mergeSort(data, temp, mid + 1, r); wN+3OPM
else ?oD]J
insertSort(data, mid + 1, r - mid); 9'My/A0
pzQWr*5a
for (i = l; i <= mid; i++) { *_ U=KpZF
temp = data; (lzZ=T
} Ft[)m#Dj`
for (j = 1; j <= r - mid; j++) { tO@n3"O
temp[r - j + 1] = data[j + mid]; F?!X<N{
} 7 {n>0@_
int a = temp[l]; Z ? F*Z0y
int b = temp[r]; ZLS\K/F>>=
for (i = l, j = r, k = l; k <= r; k++) { #~I.F4
if (a < b) { mu>L9Z~(L_
data[k] = temp[i++]; <5xlP:Cx
a = temp; 0dKv%X#\
} else { K:JM*4W
data[k] = temp[j--]; W]-c`32~S
b = temp[j]; /SvB w>gQ
} TwT@_~IM
} :~ ; 48m
} w vQ.9
w(EUe4 w{
/** &$x1^
* @param data S#|dmg;p
* @param l \G~<O071
* @param i RHIGNzSz
*/ .!^}sp,E
private void insertSort(int[] data, int start, int len) { v6#i>n~x,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a^>e|Eq|
} <`P7^ 'z!
} R/|2s
} sq;nUA=
} i\yp(tE%^
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堆排序： bPL.8hX
d"#& VlKcv
package org.rut.util.algorithm.support; 9N*!C{VW
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import org.rut.util.algorithm.SortUtil; 7FYq6wi
D3.$Vl,.
/** }^"#&w3<
* @author treeroot P6~&,a
* @since 2006-2-2 enB2-)<K
* @version 1.0 8n~ o="
*/ i[r>^U8O
public class HeapSort implements SortUtil.Sort{ y=k!>Y|E
~z$+uK
/* (non-Javadoc) dZ;rn!dg>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TMAart;<
*/ RkTO5XO
public void sort(int[] data) { U+7!Vpq
MaxHeap h=new MaxHeap(); (V:)`A_-
h.init(data); [`/d$V!e
for(int i=0;i h.remove(); _Y8RP%
System.arraycopy(h.queue,1,data,0,data.length); e00s*LdC
} p/4}SU
*;!p#qL
private static class MaxHeap{ m1{OaHxKh
+|c1G[Jh
void init(int[] data){ Bm:N@wg
this.queue=new int[data.length+1]; \ x>#bql+
for(int i=0;i queue[++size]=data; {Ip)%uR
fixUp(size); -s,guW |
} hY}.2
} 5 cz6\A&
Ew$-,KC[
private int size=0; &br_opNi
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private int[] queue; DFN
2& ZoG%)
public int get() { ,mm9X\ '
return queue[1]; Ou,Eu05jt'
} fF.qQTy;7
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public void remove() { -$@4e|e%a
SortUtil.swap(queue,1,size--); OJTEvb6nPg
fixDown(1); IKVS7m
} V(6GM+
file://fixdown rwCjNky!
private void fixDown(int k) { M F_VMAq
int j; r>.^4Z@
while ((j = k << 1) <= size) { YdiXj |k+
if (j < size %26amp;%26amp; queue[j] j++; +x:-W0C:
if (queue[k]>queue[j]) file://不用交换 f3M~2jbv'p
break; :j4i(qcF
SortUtil.swap(queue,j,k); QCVwslj,K
k = j; ]YqeI*BX
} a]nyZdt`
} s\dhQZw3
private void fixUp(int k) { &XH{,fv$
while (k > 1) { t]PO4GA
int j = k >> 1; N%" /mcO
if (queue[j]>queue[k]) lL]8~3b
break; 8j%hxAV$
SortUtil.swap(queue,j,k); #M5[TN!
k = j; .pd_SQ~
} :"e,& %
} F2k)hG*|{
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} ?Rg8u
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} `Z!NOC
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SortUtil： hp6%zUR
i[x;k;m2q
package org.rut.util.algorithm; H;nq4;^yK
qGgqAF#B
import org.rut.util.algorithm.support.BubbleSort; <+2M,fq+
import org.rut.util.algorithm.support.HeapSort; J;S@Q/s
import org.rut.util.algorithm.support.ImprovedMergeSort; +""8aA
import org.rut.util.algorithm.support.ImprovedQuickSort; c7$U0JO
import org.rut.util.algorithm.support.InsertSort; //\UthOT
import org.rut.util.algorithm.support.MergeSort; g6=w MRt[
import org.rut.util.algorithm.support.QuickSort; #7~i.8L
import org.rut.util.algorithm.support.SelectionSort; r\sQ8/
import org.rut.util.algorithm.support.ShellSort; 5 LZ+~!2+
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/** B U^3Ux$
* @author treeroot Z*Qra4GBl]
* @since 2006-2-2 !ENb \'>J>
* @version 1.0 s]p3dB#
*/ DMY?'Nts!
public class SortUtil { *0aU(E#
public final static int INSERT = 1; HBc^[fJ^-
public final static int BUBBLE = 2; $A/$M\:
public final static int SELECTION = 3; X(;,-7Jw
public final static int SHELL = 4; c%+9uu3
public final static int QUICK = 5; ,.ln
public final static int IMPROVED_QUICK = 6; e2v[ma-
public final static int MERGE = 7; #sq$i
public final static int IMPROVED_MERGE = 8; ^|(w)Sy
public final static int HEAP = 9; 8R6!SB
=O)dHY}
public static void sort(int[] data) { yn[^!GuJ_
sort(data, IMPROVED_QUICK); 4?AggqW
} N:y3tpG
private static String[] name={ P*#H]Pv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7O)U(<70
}; poqx O
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private static Sort[] impl=new Sort[]{ s9wcZO
new InsertSort(), CjtXU=}A
new BubbleSort(), >g]kbes-\
new SelectionSort(), C#<:x!
new ShellSort(), 'y [eH
new QuickSort(), IQS:tL/
new ImprovedQuickSort(), Ew=8"V`C
new MergeSort(), 0wLu*K5$4E
new ImprovedMergeSort(), n0T\dc~
new HeapSort() O6^>L0'
}; m q`EMOH
n+M:0{Y|
public static String toString(int algorithm){ zUM;Qwl
return name[algorithm-1]; 8"4&IX
} 8Vkw vc
C|"h]
public static void sort(int[] data, int algorithm) { -;TqdL@
impl[algorithm-1].sort(data); m ?a&XZ
} [<Wo7G1s
2<Tbd"x?
public static interface Sort { $&96qsr
public void sort(int[] data); !_VKJZuH
} ysV0Ed
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public static void swap(int[] data, int i, int j) { [a;U'v*
int temp = data; 1nb]~{l
data = data[j]; ,~-"EQT
data[j] = temp; Wc4F'}s
} F$UvYy4O d
} )\C:|