[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; AB.ZmR9|
} [xDn=)`{V
int i1=l; C61E=$
int i2=mid+1; 7%|HtBXv^
for(int cur=l;cur<=r;cur++){ X-yS9E
if(i1==mid+1) $3Sm?
data[cur]=temp[i2++]; C9%A?'`
else if(i2>r) G Mg|#DV
data[cur]=temp[i1++]; 5N#Sic M
else if(temp[i1] data[cur]=temp[i1++]; (]"`>,ray
else vf!lhV-UG+
data[cur]=temp[i2++]; +W|VCz
} 7MX5hZF"
} ZjgfkZAS
kc[<5^b5
} q$B|a5a?
pQCW6X
改进后的归并排序: UotLJa
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package org.rut.util.algorithm.support; aslb^
uF@DJX}>
import org.rut.util.algorithm.SortUtil; DbN_(mC
e$-Y>Dd
/** "2 qivJ
* @author treeroot F,xFeq$/{
* @since 2006-2-2 @(m?j1!M
* @version 1.0 ZY)&Fam}
*/ )%I62<N,z
public class ImprovedMergeSort implements SortUtil.Sort { {u$<-W-&
l Ztw[c
private static final int THRESHOLD = 10; _WBWFGj
zE=^}K+
/* h(FFG%H(
* (non-Javadoc) *5" )3\/
* j-/F*P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YZc{\~d
*/ ^B'N\[
public void sort(int[] data) { $btk48a7
int[] temp=new int[data.length]; ^Zq3K
mergeSort(data,temp,0,data.length-1); LHusy;<E[
} U1pwk[
VBg M7d
private void mergeSort(int[] data, int[] temp, int l, int r) { 810uxw{\
int i, j, k; Nf9$q| %!
int mid = (l + r) / 2; KCS},X_
if (l == r) `6Yk-5
return; 8sU}[HH*1
if ((mid - l) >= THRESHOLD) pq*4yaTT'
mergeSort(data, temp, l, mid); iRI7x)^0"z
else 0PJ7o#}_{@
insertSort(data, l, mid - l + 1); {xQ(xy
if ((r - mid) > THRESHOLD) "tU,.U
mergeSort(data, temp, mid + 1, r); *qw//W
else n{z!L-x^b
insertSort(data, mid + 1, r - mid); 3Ebkq[/*%
4nD U-P#f
for (i = l; i <= mid; i++) { CQET
temp = data; 82w=t
} $+w-r#,
for (j = 1; j <= r - mid; j++) { 2]_fNCNLN
temp[r - j + 1] = data[j + mid]; 6V @ [<d
} NfXEW-
int a = temp[l]; oedLe9!
int b = temp[r]; e`t-:~'
for (i = l, j = r, k = l; k <= r; k++) { MY z\ R \
if (a < b) { x4/f5
data[k] = temp[i++]; \`|OAC0a
a = temp; ?`=r@
} else { F'JceU
data[k] = temp[j--]; a*{ -r]
b = temp[j]; 1y6{3AZm<
} 5H/D~hr&
} 3/RNStd<L!
} ),U>AiF]
$w ,^q+
/** j%Z%_{6Ds*
* @param data '>dx~v %
* @param l fqD1Ej
* @param i JX2@i8[~
*/ u|M_O5^
private void insertSort(int[] data, int start, int len) { oGqbk x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YjwC8#$
} oTxE]a,
} e'5sT#T9l
} \t%rIr
} 5VK.Zs\
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堆排序： )\fLS d
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package org.rut.util.algorithm.support; c>yqq'
//-;uEO
import org.rut.util.algorithm.SortUtil; U<.,"`=l
M%1wT9
/** (b;*8
* @author treeroot 'mE!,KeS;
* @since 2006-2-2 t(5PKD#~Dc
* @version 1.0 FKk.BA957h
*/ nY50dFA,
public class HeapSort implements SortUtil.Sort{ "/$2oYNy+
l5CFm8%
/* (non-Javadoc) H 5'Ke+4.e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "DU1k6XC
*/ okQ<_1e{
public void sort(int[] data) { J=AF`[
MaxHeap h=new MaxHeap(); ?bH!|aW(H
h.init(data); ^mCKRWOP'
for(int i=0;i h.remove(); |lVoL.Z,0
System.arraycopy(h.queue,1,data,0,data.length); _*LgpZ-2(
} W60C$*h
+|TFxaVz
private static class MaxHeap{ RP~ hi%A
Eh/Z4pzT
void init(int[] data){ eaCh;IpIf
this.queue=new int[data.length+1]; !5=S2<UX
for(int i=0;i queue[++size]=data; }J|Pd3Q Sf
fixUp(size); I&|J +B?#
} 8;1,saA_9
} !t!\b9=
b[`fQv$G
private int size=0; 2mfKy9QxO
O}mz@-Z
private int[] queue; 7':qx}c#!1
db5@+_
public int get() { pF}WMt
return queue[1]; zJX _EO
} db0]D\
KkD&|&!Q7u
public void remove() { VJ()sbl{k
SortUtil.swap(queue,1,size--); K%RjWX=H
fixDown(1); NX9K%J
} *_CzCl^
file://fixdown xJ|_R,>.H
private void fixDown(int k) { 0`%Ask
int j; ?'+kZ|
while ((j = k << 1) <= size) { ylwh_&>2
if (j < size %26amp;%26amp; queue[j] j++; |++\"g
if (queue[k]>queue[j]) file://不用交换 /O&{fo
break; ,RIC _26
SortUtil.swap(queue,j,k); s8iB>-dk
k = j; fH*1.0f]6
} 9KGi%UIFvn
} :~%{
private void fixUp(int k) { Y]])Tq;h5
while (k > 1) { ]c~W$h+F
int j = k >> 1; [ T!0ka
if (queue[j]>queue[k]) d@e2+3<
break; 5!*@gn
SortUtil.swap(queue,j,k); Z[?zaQ$
k = j; RSK5 }2
} $Z[W}7{pt#
} )H|cri~D
c-q=Ct
} 8D6rShx =
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} l[u=_uaYl
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SortUtil： $, @,(M`i}
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package org.rut.util.algorithm; $fFh4O4
gjDxgNpa
import org.rut.util.algorithm.support.BubbleSort; 8qWN~Gk1p{
import org.rut.util.algorithm.support.HeapSort; g8L{xwx<
import org.rut.util.algorithm.support.ImprovedMergeSort; 1%`Nu ]D
import org.rut.util.algorithm.support.ImprovedQuickSort; G%5ZG$as
import org.rut.util.algorithm.support.InsertSort; lXOT>$qR<
import org.rut.util.algorithm.support.MergeSort; qEajT"?
import org.rut.util.algorithm.support.QuickSort; {dXmSuO
import org.rut.util.algorithm.support.SelectionSort; }(/\vTn*1
import org.rut.util.algorithm.support.ShellSort; g=L80$1
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/** cbaa*qoU
* @author treeroot $i]G'fj
* @since 2006-2-2 AtYqD<hl:
* @version 1.0 .-4]FGg3
*/ bd)'1;p
public class SortUtil { U2vM|7]VP
public final static int INSERT = 1; ,Aw Z%
public final static int BUBBLE = 2; RAB'%CY4
public final static int SELECTION = 3; P]%)c6Uh
public final static int SHELL = 4; %=`wN^3t2
public final static int QUICK = 5; pi;'!d[l%
public final static int IMPROVED_QUICK = 6; 45.Vr[FS.
public final static int MERGE = 7; 0I['UL^!F
public final static int IMPROVED_MERGE = 8; X<mlaXwrA
public final static int HEAP = 9; k<}3_
r<c&;*
public static void sort(int[] data) { KGJ*h
sort(data, IMPROVED_QUICK); _:7:ixN[Ie
} kY^ k*-v
private static String[] name={ "X,*VQl:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /_qW?LKG/
}; W*r1Sy
p-XO4Pc6
private static Sort[] impl=new Sort[]{ L25%KGg'o
new InsertSort(), )18C(V-x
new BubbleSort(), ToX--w4
new SelectionSort(), -OXC;y
new ShellSort(), V_/.]zQA
new QuickSort(), Y1R?,5
new ImprovedQuickSort(), N~~ sM"n
new MergeSort(), hMnm>
new ImprovedMergeSort(), ;b_l/T(
new HeapSort() ?Sr7c|a2
}; >PK 6CR
u\Y3h:@u
public static String toString(int algorithm){ H*HL:o-[
return name[algorithm-1]; SZ1yy["
} bCqTubbx!t
L30$
public static void sort(int[] data, int algorithm) { $8WWN} OC
impl[algorithm-1].sort(data); \>[k0<
} b} FhC"'i
%ty`Oa2
public static interface Sort { 7KL@[
public void sort(int[] data); mI'&!@WG
} -car>hQq
+t%1FkI\
public static void swap(int[] data, int i, int j) { EhAaaG
int temp = data; {"c`k4R
data = data[j]; 6/6{69tnr
data[j] = temp; otbr8&?-
} d9up! k
} QJ+Ml