[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; \8\)5#?
} f.V;Hl,
int i1=l; MWf]U
int i2=mid+1; V~LZ%NZ8
for(int cur=l;cur<=r;cur++){ eeIh }t>[
if(i1==mid+1) x4v@Kk/
data[cur]=temp[i2++]; 8f>=.O*)
else if(i2>r) 8+vZ9!7
data[cur]=temp[i1++]; L'{;V\d
else if(temp[i1] data[cur]=temp[i1++]; A.7:.5Cx'
else lhg3 }dW
data[cur]=temp[i2++]; T!$7:% D
} E_&Hje|J_[
} ".L+gn}u-
^q6H =Dl
} OJE<2:K
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改进后的归并排序: Hh @q;0ni
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package org.rut.util.algorithm.support; M,V+bt
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import org.rut.util.algorithm.SortUtil; #QJ mAA
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/** Wd4fIegk
* @author treeroot 2&91C[da0
* @since 2006-2-2 $;un$ko6%
* @version 1.0 E [JXQ76
*/ m1_?xU
public class ImprovedMergeSort implements SortUtil.Sort { i} 96,{
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private static final int THRESHOLD = 10; Rde_I`Ru
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/* || ?B1
* (non-Javadoc) 5A1oZ+C#
* /uI/8>p(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oR}ir
*/ ulFU(%&
public void sort(int[] data) { o;Ijv\Em
int[] temp=new int[data.length]; eux_tyC
mergeSort(data,temp,0,data.length-1); w?ssV
} l|`FW
1!8*mk_R{
private void mergeSort(int[] data, int[] temp, int l, int r) { q3Umqvl)oe
int i, j, k; G],+?E_,
int mid = (l + r) / 2; O<4i)Lx2
if (l == r) "@B!5s0
return; <[C9F1]Ya
if ((mid - l) >= THRESHOLD) "_+X#P x
mergeSort(data, temp, l, mid); Ku LZg
else wo2^,Y2z+
insertSort(data, l, mid - l + 1); g$VcT\X
if ((r - mid) > THRESHOLD) o^~6RZ
mergeSort(data, temp, mid + 1, r); Gb61X6
else O%9Cq}*
insertSort(data, mid + 1, r - mid); 'R*gSqx~
/Nq!^=
for (i = l; i <= mid; i++) { ~J2-B2S!
temp = data; 322W"qduTZ
} ^7q=E@[e
for (j = 1; j <= r - mid; j++) { !mBsDn(J
temp[r - j + 1] = data[j + mid]; X[k-J\
} $N;!. 5lX3
int a = temp[l]; Lhl)pP17
int b = temp[r]; a#H=dIj
for (i = l, j = r, k = l; k <= r; k++) { x$CpUy{6
if (a < b) { oT 8
data[k] = temp[i++]; Td[w<m+p<P
a = temp; Ga f/0/|
} else { 0w\X
data[k] = temp[j--]; DjOFfD\MF
b = temp[j]; "b%hAdR
} 2a.NWJS
} wlqV1.K
} u#p1W|\4
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/** ,2JqX>On>Y
* @param data ~m!>e])P?X
* @param l qq-&z6;$
* @param i g|<)J-`Q
*/ =khjD[muC
private void insertSort(int[] data, int start, int len) { 7tAWPSwf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *" <tFQ
} {N5g52MN
} 7~\Dzcfk"P
} NOyLZa'
} QXJD'c
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堆排序： ([|5(Omd\
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package org.rut.util.algorithm.support; hD<z^j+
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import org.rut.util.algorithm.SortUtil; ;YZw{|gsh
SJU93n"G/
/** n!Y.?mU6
* @author treeroot ("/*k
* @since 2006-2-2 $O}gl Q
* @version 1.0 IX7d[nm39
*/ Ccz:NpK+
public class HeapSort implements SortUtil.Sort{ qjR;c& qR
8e>;E
/* (non-Javadoc) I.x0$ac7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~$r^Ur!E\
*/ W<!q>8Xn?
public void sort(int[] data) { BCUw"R#
MaxHeap h=new MaxHeap(); RB/[(4
h.init(data); lG#&Pv>-
for(int i=0;i h.remove(); K'?ab 0
System.arraycopy(h.queue,1,data,0,data.length); _?G\^^
} )\mklM9Z
([f6\Pw\ <
private static class MaxHeap{ eBU\&z[
.6O>P2m]a_
void init(int[] data){ Va=0R
this.queue=new int[data.length+1]; AN:,t(w
for(int i=0;i queue[++size]=data; 83R"!w18
fixUp(size); @Jvw"=
} q<c).4
} [&NF0c[i
KD,b.s
private int size=0; :@:R4Ac
=m}{g/Bk
private int[] queue; 2gt08\
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public int get() { 1MB
return queue[1]; Fi5,y;]R
} Ce5 }+A}
D%^EG8i n.
public void remove() { (|U+(~PJ
SortUtil.swap(queue,1,size--); D<xPx
fixDown(1); z[t$[Qg
} O')Ivm,E
file://fixdown 5yA^n6
private void fixDown(int k) { L7D'wf
int j; T$}<So|
while ((j = k << 1) <= size) { VKN^gz
if (j < size %26amp;%26amp; queue[j] j++; _|A)ueY
if (queue[k]>queue[j]) file://不用交换 /_}v|E0
break; %J|EDf,M
SortUtil.swap(queue,j,k); y~-?
k = j; m k -" U7;
} 4uNcp0
} R4IFl z
private void fixUp(int k) { =_ rn8
while (k > 1) { 1]hMA\x
int j = k >> 1; c&0IJ7fZG
if (queue[j]>queue[k]) u|QfCwQ
break; 'kh%^_FH7
SortUtil.swap(queue,j,k); L3<XWpv
k = j; Szg<;._J
} `E|IMUB~
} &rNXn?>b
{X"X.`p
} x(t}H8q
zM@iG]?kc
} !4 hs9b
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SortUtil： P{}Oe *9"
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package org.rut.util.algorithm; 3)3'-wu
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import org.rut.util.algorithm.support.BubbleSort; o&CvjE
import org.rut.util.algorithm.support.HeapSort; @C!q S7k)
import org.rut.util.algorithm.support.ImprovedMergeSort; *=sU+x&X
import org.rut.util.algorithm.support.ImprovedQuickSort; ZR#UoYjupb
import org.rut.util.algorithm.support.InsertSort; #JW1JCT
import org.rut.util.algorithm.support.MergeSort; SjJUhTb
import org.rut.util.algorithm.support.QuickSort; ]3I_H+hU
import org.rut.util.algorithm.support.SelectionSort; 6C3y+@9
import org.rut.util.algorithm.support.ShellSort; ';lO[B
H~$|y9>qI
/** 'rF TtT
* @author treeroot 1/fvk
* @since 2006-2-2 4({=(O
* @version 1.0 +Rh'VZJs
*/ 2xnOWW
public class SortUtil { *FAg^G&1
public final static int INSERT = 1; Bo0y"W[+
public final static int BUBBLE = 2; AVJF[t,
public final static int SELECTION = 3; 3n/L;T,X
public final static int SHELL = 4; TxiJ?sDh*
public final static int QUICK = 5; Zn^E
public final static int IMPROVED_QUICK = 6; EP8LJzd"
public final static int MERGE = 7; b,@:eVQ7
public final static int IMPROVED_MERGE = 8; L{Th>]X
public final static int HEAP = 9; 4Cfwz-Qo
/;lk.-yU
public static void sort(int[] data) { l9jcoVo.
sort(data, IMPROVED_QUICK); tT v@8f
} E?zp?t:a
private static String[] name={ +|0m6)J]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 49#-\=<gt
}; ~q4y'dBy*
[6Wr t8"
private static Sort[] impl=new Sort[]{ EtL=_D-
new InsertSort(), 'Oc8[8
new BubbleSort(), @2u<Bh}}
new SelectionSort(), J)-owu;
new ShellSort(), 7]^Cg;EtM:
new QuickSort(), *\`C!r
new ImprovedQuickSort(), :C&?(HJ&r
new MergeSort(), af_zZf!0
new ImprovedMergeSort(), 4R0_%x6vG
new HeapSort() t"L:3<U7
}; \Dc\H)
tb i;X=5
public static String toString(int algorithm){ *[U:'o`67
return name[algorithm-1]; q+DH2&E'
} z6!X+`&
'l}3Iua6qk
public static void sort(int[] data, int algorithm) { vIREvj#U
impl[algorithm-1].sort(data); m=K XMX
} ^wHMKC
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public static interface Sort { X}!_p& WI
public void sort(int[] data); U!'lc}5
} %MIu;u FR
L=p.@VSZ
public static void swap(int[] data, int i, int j) { +-Dd*yD6<
int temp = data; c`>\R<Z ]
data = data[j]; xvkof 'Q)
data[j] = temp; yO6i "3
} u7;A`
} i~.[iZf|