[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; uwI$t[
} <Wrn/%tL
int i1=l; =Jyi9VN=&
int i2=mid+1; .)(5F45Wg
for(int cur=l;cur<=r;cur++){ (1%O;D.*?{
if(i1==mid+1) N>V\
data[cur]=temp[i2++]; ,zF^^,lO7
else if(i2>r) Cx~,wk;=
data[cur]=temp[i1++]; A4K8DP
else if(temp[i1] data[cur]=temp[i1++]; y26?>.!
else 6(pa2
data[cur]=temp[i2++]; 0*J},#ba$
} FTgqE@
} cnw?3/J
H8!; XB
} 8kdJ;%^N
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改进后的归并排序: 4H9mKR
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package org.rut.util.algorithm.support; #'y4UN
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import org.rut.util.algorithm.SortUtil; oaac.7.fV
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/** 7&`Yl[G
* @author treeroot 6Pp3*O`/V
* @since 2006-2-2 %2@O,uCo@
* @version 1.0 ?3#L?Cq
*/ }1kZF{KD<[
public class ImprovedMergeSort implements SortUtil.Sort { >mAi/TZC
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private static final int THRESHOLD = 10; m'n<.1;1{j
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/* X_HU?Q_N
* (non-Javadoc) 'Lu d=u{
* f|+aa6hN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E!EENg
*/ S7v# `#
public void sort(int[] data) { 61SbBJ6[
int[] temp=new int[data.length]; 9P1!<6mN\
mergeSort(data,temp,0,data.length-1); Zdfruzl&`
} a&z$4!wQB
>PS`;S!(
private void mergeSort(int[] data, int[] temp, int l, int r) { 0n/+X[%Ti
int i, j, k; ;$Pjl8\
int mid = (l + r) / 2; d~abWBgC`
if (l == r) )+ (GE
return; gmUX 2x(
if ((mid - l) >= THRESHOLD) vqhu%ZyP
mergeSort(data, temp, l, mid); ooA%/
else B<{Yj}..
insertSort(data, l, mid - l + 1); e;8nujdG"
if ((r - mid) > THRESHOLD) (jI_Dk;
mergeSort(data, temp, mid + 1, r); {Gvv^.H7
else =G\N1E
insertSort(data, mid + 1, r - mid); `E2RW{$A
Oa-(Xp,n#
for (i = l; i <= mid; i++) { RW`+F|UbE
temp = data; T9NTL\;
} bQgtZHO
for (j = 1; j <= r - mid; j++) { 0`QF:
temp[r - j + 1] = data[j + mid]; [;Y*f,UG_-
} ruU &.mZ
int a = temp[l]; $tqr+1P
int b = temp[r]; _T.T[%-&=
for (i = l, j = r, k = l; k <= r; k++) { ;9;jUQ]MyG
if (a < b) { bLsN?_jy
data[k] = temp[i++]; 7pO/!Lm
a = temp; >&[q`i{
} else { O0_kLH$.
data[k] = temp[j--]; 2TccIv
b = temp[j]; E#n=aY~u-
} /?%1;s:'
} *v#Z/RrrA
} T+j-MR}{\
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/** rI#,FZ
* @param data cU_:l.b
* @param l cqG&n0zb
* @param i /0YO`])"
*/ :h8-y&;
private void insertSort(int[] data, int start, int len) { Gp0yRT.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cT|aQM@iW
} :>-&
} 7-Mm+4O9
} KY+BXGW*
} h4E[\<?
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堆排序： 24I\smO
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package org.rut.util.algorithm.support; )}to7r7`
9P& \2/ {
import org.rut.util.algorithm.SortUtil; 63SmQsv
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/** Hto+spW
* @author treeroot PUEEfq!%
* @since 2006-2-2 4Z0Y8y8)
* @version 1.0 wCt!.<, .
*/ 'M35L30
public class HeapSort implements SortUtil.Sort{ f{j`d&|
]D<3yIGS
/* (non-Javadoc) J'C%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #k t+ )>
*/ =JE5/
public void sort(int[] data) { dO!B=/
MaxHeap h=new MaxHeap(); 8SN4E
h.init(data); a9!.e rM
for(int i=0;i h.remove(); v[]&yD
System.arraycopy(h.queue,1,data,0,data.length); MDauHtF,
} h\/T b8
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private static class MaxHeap{ i4\DSQJ
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void init(int[] data){ _F`RwBOjs
this.queue=new int[data.length+1]; *6wt+twH
for(int i=0;i queue[++size]=data; 5Ve T8/7Q
fixUp(size); \# _w=gs<i
} AvcN,
} IoCi(N;
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private int size=0; ;<H\{w@D
ki?ETC
private int[] queue; 9+!"[
lpnPd{kE
public int get() { BM[jF=0
return queue[1]; o)+Uyl
} Q tl!f
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public void remove() { 5@^['S4%8*
SortUtil.swap(queue,1,size--); _n+ 5{\z
fixDown(1); <_#a%+5d
} }CQ)W1mO"
file://fixdown .$zo_~ mR
private void fixDown(int k) { &+")~2 +
int j; H'?dsc
while ((j = k << 1) <= size) { !Q=xIS
if (j < size %26amp;%26amp; queue[j] j++; ^oDSU7j5,
if (queue[k]>queue[j]) file://不用交换 UF;iw
break; zXGi
SortUtil.swap(queue,j,k); k3UKGP1
k = j; zhVkn]z~*
} Qsg([K
} j7qGZ"8ak
private void fixUp(int k) { N*'d]P2P`J
while (k > 1) { Eb89B%L62G
int j = k >> 1; HME`7dw?
if (queue[j]>queue[k]) )KKmV6>b
break; B`?5G\7L
SortUtil.swap(queue,j,k); W+BHt{
k = j; Fjw+D1q.
} Y(R .e7]
} !h>aP4ofT
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} <nJ8%aY,
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} '7UIzk|
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SortUtil： lx&;?QQ
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package org.rut.util.algorithm; G$E+qk nJL
}5=tUfh)]'
import org.rut.util.algorithm.support.BubbleSort; li&&[=6A
import org.rut.util.algorithm.support.HeapSort; )BmO[AiOM
import org.rut.util.algorithm.support.ImprovedMergeSort; p* tAwl
import org.rut.util.algorithm.support.ImprovedQuickSort; 6MmkEU z
import org.rut.util.algorithm.support.InsertSort; 5^Ps(8VbS
import org.rut.util.algorithm.support.MergeSort; _e$T'*q
import org.rut.util.algorithm.support.QuickSort; q]wP^;\Jl
import org.rut.util.algorithm.support.SelectionSort; F1NYpCR
import org.rut.util.algorithm.support.ShellSort; qHE(p+]E
?U(`x6\:
/** ?btZdnQ))S
* @author treeroot #_'| TT>p#
* @since 2006-2-2 '<Jqp7$dL
* @version 1.0 aUbmEHFTV
*/ *V?p&/>MT
public class SortUtil { %<@x(q
public final static int INSERT = 1; (}MN16!
public final static int BUBBLE = 2; T*rx5*:o
public final static int SELECTION = 3; 2-_d~~O1N
public final static int SHELL = 4; 4+q3 Kw
public final static int QUICK = 5; ,7ZV;f81
public final static int IMPROVED_QUICK = 6; 15CKcM6
public final static int MERGE = 7; @"L*!
public final static int IMPROVED_MERGE = 8; -}9>#<v
public final static int HEAP = 9; b>f{o_
ok(dCAKP
public static void sort(int[] data) { Y1 *8&xT
sort(data, IMPROVED_QUICK); Kd;)E 9Ti
} ^'Qe.DW[
private static String[] name={ aLO'.5 ~^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D0LoT?$N
}; ?(>fB2^
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private static Sort[] impl=new Sort[]{ d< b,].
new InsertSort(), */y (~O6
new BubbleSort(), .a7!*I#g
new SelectionSort(), j S<."a/n
new ShellSort(), WbGN 5?9Q
new QuickSort(), @q+X:K5b
new ImprovedQuickSort(), 1[40\sM
new MergeSort(), PEPf=sm
new ImprovedMergeSort(), v-!^a_3Ui
new HeapSort() ';3#t(J;
}; !b8.XGo
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public static String toString(int algorithm){ h9I vuv'
return name[algorithm-1]; v6KRE3:V
} L<0eIw
.?)gn]#
public static void sort(int[] data, int algorithm) { 6 B*,Mu4A
impl[algorithm-1].sort(data); v&Oc,W
} 2dnyIgi
'yNS(Bg=
public static interface Sort { Zx 5Ue#I
public void sort(int[] data); t>JPK_b0
} `w EAU7m:
69$gPY'3
public static void swap(int[] data, int i, int j) { Sq[LwJ
int temp = data; 'oS= d
data = data[j]; 1)hO!%
data[j] = temp; tPaNhm[-q7
} =_Ip0FfK!
} 9}jezLI/3