[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; <z=d5g{n
} w7;,+Jq
int i1=l; .o&Vu,/H
int i2=mid+1; ]:6M!+?(
for(int cur=l;cur<=r;cur++){ +ROwk
if(i1==mid+1) YyF=u~l
data[cur]=temp[i2++]; JIA'3"C
else if(i2>r) 2,3pmb
data[cur]=temp[i1++]; mfI>1W(
else if(temp[i1] data[cur]=temp[i1++]; [ITtg?]F
else R)<PCe`vf
data[cur]=temp[i2++]; ZbZCW:8>k
} zS6oz=
} HZ+l){u
-/7[\S
} Pr!H>dH8o
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改进后的归并排序: qkg`4'rLg
1 po.Cmx
package org.rut.util.algorithm.support; bH7 lUS~
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import org.rut.util.algorithm.SortUtil; I|SQhbi
XEB1%. p
/** ';\v:dP
* @author treeroot #7Pnw.s3zz
* @since 2006-2-2 S 6|#9C&
* @version 1.0 >7[o=!^:4
*/ Vzs_g]V
public class ImprovedMergeSort implements SortUtil.Sort { Q8~|0X\.g
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private static final int THRESHOLD = 10; S%sD#0l
|P>Yf0
/* n@`:"j%s_
* (non-Javadoc) /jtU<uX
* v{T%`WuPRf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rZK;=\Ot
*/ 4|]0%H~n6
public void sort(int[] data) { t@Bl3Nt{
int[] temp=new int[data.length]; ZliJc7lss
mergeSort(data,temp,0,data.length-1); `L=d72:
} J$/'nL<{^
?q%&"
private void mergeSort(int[] data, int[] temp, int l, int r) { v95O)cC:W
int i, j, k; /ZeN\ybx
int mid = (l + r) / 2; j-R9=vB2
if (l == r) Sp2<rI
return; \a.^5g
if ((mid - l) >= THRESHOLD) K4{1}bU{>
mergeSort(data, temp, l, mid); zIeJ[J@
else +IM:jrT(
insertSort(data, l, mid - l + 1); ],3#[n[ m
if ((r - mid) > THRESHOLD) C;EC4n+s
mergeSort(data, temp, mid + 1, r); $ncJc
else ptlcG9d-
insertSort(data, mid + 1, r - mid); \D<w:\P
.EXe3!J)!
for (i = l; i <= mid; i++) { :|V`QM
temp = data; T[<deQ
} PE\.JU
for (j = 1; j <= r - mid; j++) { ,ezC}V0M
temp[r - j + 1] = data[j + mid]; RM(MCle}
} v"K #
int a = temp[l]; ?}tWI7KI
int b = temp[r]; L (#DVF
for (i = l, j = r, k = l; k <= r; k++) { A'=,q
if (a < b) { xeGl}q|
data[k] = temp[i++]; )^)j=xs
a = temp; 6 #vc"5@M
} else { !go$J]T
data[k] = temp[j--]; TB@0j ;g
b = temp[j]; {+SshT>J
} P#ro;3S3y
} qIC9L"I
} ;GjZvo
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/** A@o:mZ+XN(
* @param data 8=Z]?D=
* @param l f-BEfC,}'
* @param i W7 .Y`u[
*/ \H-,^[G3
private void insertSort(int[] data, int start, int len) { N"M?kk,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O.HaEg/-
} v[*&@aW0n
} MB:VACCr
} M#?^uu'
} p3L0'rY|+
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堆排序： ^G*zFqa+`
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package org.rut.util.algorithm.support; #@v$`Df<
0)^$9Z
import org.rut.util.algorithm.SortUtil; G8Qo]E9-/
Tx|}ke~
/** jlA?JB
* @author treeroot @}r2xY1
* @since 2006-2-2 8e:\T.)M
* @version 1.0 Wi5rXZS
*/ M#U#I:z%
public class HeapSort implements SortUtil.Sort{ .vm.g=-q
(0cL! N;;
/* (non-Javadoc) 9cO m$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~ZN]2}
*/ O*:8gu'Y2
public void sort(int[] data) { 4P(ysTuM
MaxHeap h=new MaxHeap(); %dN',
h.init(data); :9=J=G*
for(int i=0;i h.remove(); Q 6)5*o8n
System.arraycopy(h.queue,1,data,0,data.length); L( B(x>w
} 33*NgQ;&~'
i=ztWKwKf
private static class MaxHeap{ t]QGyW A]
,];4+&|8kW
void init(int[] data){ F-g7*
this.queue=new int[data.length+1]; IdzrQP
for(int i=0;i queue[++size]=data; UojHlTg#bT
fixUp(size); f5droys9
} Og8'K=O#
} |K jy4.2
2^TJ_xG~
private int size=0; M10u?
0nDlqy6b1b
private int[] queue; JBCJVWUt
"\:ZH[j
public int get() { )RFE< Qcj
return queue[1]; -T 5$l
} rP=!!fC1;
t622b?w
public void remove() { |}O9'fyU8
SortUtil.swap(queue,1,size--); ! 54(K6a[
fixDown(1); ,M)NC%0X
} "V>7u{T
file://fixdown #;#r4sJwU
private void fixDown(int k) { j+E[[
int j; F9Bj$`#)
while ((j = k << 1) <= size) { pH'1be{K
if (j < size %26amp;%26amp; queue[j] j++; ?Ww\D8yV&
if (queue[k]>queue[j]) file://不用交换 2Q/#.lNL
break; qUMM}ls
SortUtil.swap(queue,j,k); G3.MS7J
k = j; +TR#
} yQ3*~d~U|L
} ;?A?1q8*
private void fixUp(int k) { T&5dF9a
while (k > 1) { @rh1W$
int j = k >> 1; %~ROV>&
if (queue[j]>queue[k]) h>l
break; d:x=g i!
SortUtil.swap(queue,j,k); }&o*ZY-1
k = j; LhM{d
} 6EeUiLd
} !{L6 4qI
?_NhR
} OcBn1k.
qZ:--,9+
} ~ 3HI;
z [qO5z~I
SortUtil： XP$1CWI
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package org.rut.util.algorithm; 1HBdIWhHv.
xzGs%01]
import org.rut.util.algorithm.support.BubbleSort; I2b\[d
import org.rut.util.algorithm.support.HeapSort; e?&4;
import org.rut.util.algorithm.support.ImprovedMergeSort; m9Z3q ;
import org.rut.util.algorithm.support.ImprovedQuickSort; =}12S:Qhj
import org.rut.util.algorithm.support.InsertSort; TAbC-T.EV
import org.rut.util.algorithm.support.MergeSort; tvC7LLNP<
import org.rut.util.algorithm.support.QuickSort; @Lj28&4:<
import org.rut.util.algorithm.support.SelectionSort; (:p&[HNuN
import org.rut.util.algorithm.support.ShellSort; P9wx`x""k
m;v/(d>
/** 8")1,
* @author treeroot 3j2% '$>E^
* @since 2006-2-2 jx=2^A/i2-
* @version 1.0 ZA;wv+hF=
*/ f"0{e9O]2
public class SortUtil { o~Im5j],*
public final static int INSERT = 1; FDHa|<oz
public final static int BUBBLE = 2; ,a I0Aw
public final static int SELECTION = 3; _a"\g9{%*
public final static int SHELL = 4; CENA!WWQ
public final static int QUICK = 5; XOM@Pi#z
public final static int IMPROVED_QUICK = 6; n{~Ws^d
public final static int MERGE = 7; Y^?J3[@
public final static int IMPROVED_MERGE = 8; w:}RS.AK
public final static int HEAP = 9; tXocGM{6C
GUe&WW:Sqk
public static void sort(int[] data) { =;1MpD
sort(data, IMPROVED_QUICK); ^[d|^fRH Q
} >D';i\2j&
private static String[] name={ jocu=Se@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wHQyMq^
}; |7jUf$Q\p
ZW}0{8Dk
private static Sort[] impl=new Sort[]{ Vm1U00lM{
new InsertSort(), T1@]:`&
new BubbleSort(), YdgaZJs
new SelectionSort(), j HOE%
new ShellSort(), Q6cF<L`bW
new QuickSort(), p& > z=Z*
new ImprovedQuickSort(), /CtR|~wL
new MergeSort(), /lQGFLZL
new ImprovedMergeSort(), ~PT(/L
new HeapSort() crJyk#_
}; \pzqUTk
CapWn~*g
public static String toString(int algorithm){ O;qerE?i`
return name[algorithm-1]; X9f!F2x
} ,R j{^-k
o3hsPzOQx
public static void sort(int[] data, int algorithm) { B6gSt3w.
impl[algorithm-1].sort(data); +G3&{#D ?
} 5]WpH0kzO
^n|u$gIF8
public static interface Sort { _RFTm.9&
public void sort(int[] data); > dJvl|
} T(<C8
(R*K)(Nw[
public static void swap(int[] data, int i, int j) { F3\'WQh
int temp = data; Tsez&R$k
data = data[j]; CL*i,9:NR
data[j] = temp; :N~1fvx
} ;a/Gs^W
} Q0f7gY1-%