[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; $F+ LDs
} ls:w8&`*
int i1=l; ~d*(=G
int i2=mid+1; p/@smke
for(int cur=l;cur<=r;cur++){ o:P}Wg/NK
if(i1==mid+1) .rqhi
data[cur]=temp[i2++]; @>>~CZ`l
else if(i2>r) +jnJ|h({
data[cur]=temp[i1++]; JKmIvZ)8
else if(temp[i1] data[cur]=temp[i1++]; r{I% \R!@
else x!58cS*
data[cur]=temp[i2++]; Y+u_IJ
} } .y 1;.
} 3H6lBF
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} s %\-E9 T
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改进后的归并排序: y0.8A-2:
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package org.rut.util.algorithm.support; KP5C}ZK+s
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import org.rut.util.algorithm.SortUtil; ,a]?S^:y]
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/** q]e`9/U
* @author treeroot .Blf5b
* @since 2006-2-2 L4z ~B!uvF
* @version 1.0 ww $
*/ qPy1;maXP
public class ImprovedMergeSort implements SortUtil.Sort { 'yG4 LF
o{q{!7DH@
private static final int THRESHOLD = 10; .ndCfdy~
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/* aYS!xh206
* (non-Javadoc) 2:7zG"$
* n+q!l&&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "x*egI
*/ PV\+P6aIb
public void sort(int[] data) { ^^as'Dk
int[] temp=new int[data.length]; oO|KEY(
mergeSort(data,temp,0,data.length-1); 0C irfcs}Z
} 6vNrBB
bITPQ7+
private void mergeSort(int[] data, int[] temp, int l, int r) { >\=3:gb:
int i, j, k; "wnzo,
int mid = (l + r) / 2; ;=; 9tX
if (l == r) {rH@gz|@i
return; :LRYYw
if ((mid - l) >= THRESHOLD) SVs_dG$
mergeSort(data, temp, l, mid); %9N7Ln|%
else i}mVQ\j5
insertSort(data, l, mid - l + 1); RcM/!,B
if ((r - mid) > THRESHOLD) 2Mvrey)
mergeSort(data, temp, mid + 1, r); F9E<K]7K
else Bb^;q#S1
insertSort(data, mid + 1, r - mid); +|'c>,?2H
_Wp{[TH
for (i = l; i <= mid; i++) { nv%rJy*w[
temp = data; fW3(&@
} lG!|{z7+0
for (j = 1; j <= r - mid; j++) { p&bROuw<T
temp[r - j + 1] = data[j + mid]; S^>,~R.TX
} MLje4
int a = temp[l]; ke]Lw
int b = temp[r]; rrqR}}l
for (i = l, j = r, k = l; k <= r; k++) { 4Thn])%I
if (a < b) { dx&'fe*?
data[k] = temp[i++]; `YLD`(\
a = temp; `W:%mJd9
} else { ?:8ido#-
data[k] = temp[j--]; +*T7@1
b = temp[j]; aM2l2
} ;q:zT\A
} $M lW4&a|
} dWUm\t'#
"UGY2skf;
/** 4c$ zKqz
* @param data 4UlyxA~
* @param l w' OXlR
* @param i r(aLEJ"u?
*/ A3no~)wZn
private void insertSort(int[] data, int start, int len) { M/ni6%x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Jz.NHiLct1
} TYmP)
} %Yicg6:
} CBOi`bEf
} ?_$=l1vf
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堆排序： G_{&sa
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package org.rut.util.algorithm.support; l@H
@}OL9Ch
import org.rut.util.algorithm.SortUtil; Lz!,kwg
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/** 6c"0})p
* @author treeroot +5o8KYV
* @since 2006-2-2 +!z{5:
* @version 1.0 RIXMJ7e7
*/ 5b/|!{
public class HeapSort implements SortUtil.Sort{ lB4GU y$
TRQF^P3o
/* (non-Javadoc) Wi2WRJdyu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,^;)<[
*/ =aA+~/~8%
public void sort(int[] data) { ^m"u3b4
MaxHeap h=new MaxHeap(); e2ilB),
h.init(data); SAK!z!t
for(int i=0;i h.remove(); ##;Er47@^
System.arraycopy(h.queue,1,data,0,data.length); 65p?Igb
} .DR<Te
%K`% *D
private static class MaxHeap{ Y/ee~^YxK'
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void init(int[] data){ Vf'd*-_!Q<
this.queue=new int[data.length+1]; ? glSC$b
for(int i=0;i queue[++size]=data; IOoz^/'
fixUp(size); j!4et;
} =fve/_Q~
} sqJSSNt
+~roU{& o
private int size=0; ?~;:jz|9<'
]dk8lZ;bo
private int[] queue; ("+}=*?OF3
kc @[9eV
public int get() { VUYmz)m5
return queue[1]; Q7$.LEioN
} Tekfw
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public void remove() { /D^"X 4!"
SortUtil.swap(queue,1,size--); ;F#7Px(q
fixDown(1); ?)[EO(D
} D <&X_
file://fixdown k.^coI5
private void fixDown(int k) { BV(8y.H
int j; Jn3An
while ((j = k << 1) <= size) { *l;B\=KR
if (j < size %26amp;%26amp; queue[j] j++; $Y_i4(
if (queue[k]>queue[j]) file://不用交换 1jPJw3"3h
break; &S]@Ot<z
SortUtil.swap(queue,j,k); N:tY":Hi
k = j; X 9%'|(tL
} UkHY[M7;
} rEv*)W
private void fixUp(int k) { t|<NI+H(e
while (k > 1) { E3l> 3
int j = k >> 1; :.d:9Z|_
if (queue[j]>queue[k]) \&3"<6xA
break; f=!VsR2o
SortUtil.swap(queue,j,k); MpqZH{:?G
k = j; CI :`<PZ\-
} z=_Ef3`M
} \,&co
.G(llA}
} f0<%&2ym
@qjfZH@
} ;9ly'<up
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SortUtil： s^|.Zr;,>
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package org.rut.util.algorithm; Cc<,z*T
d,tU#N{Q6
import org.rut.util.algorithm.support.BubbleSort; kbfC|5S
import org.rut.util.algorithm.support.HeapSort; *^wB!{.#
import org.rut.util.algorithm.support.ImprovedMergeSort; {^rs#, W
import org.rut.util.algorithm.support.ImprovedQuickSort; ;w-qHha
import org.rut.util.algorithm.support.InsertSort; U uM$~qf/K
import org.rut.util.algorithm.support.MergeSort; ;)I'WQ]Q
import org.rut.util.algorithm.support.QuickSort; NeBsv= [-
import org.rut.util.algorithm.support.SelectionSort; Ppt2A6W
import org.rut.util.algorithm.support.ShellSort; 80Y\|)
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/** 4)4+M
* @author treeroot -0eq_+oQ
* @since 2006-2-2 uy^
* @version 1.0 P"?FnTbv[
*/ 7Wa?$6d
public class SortUtil { [NIlbjYH
public final static int INSERT = 1; ?@t d
public final static int BUBBLE = 2; pD2<fP_
public final static int SELECTION = 3; G,<T/f .{$
public final static int SHELL = 4; A'K%WW*'U
public final static int QUICK = 5; #nO|A\N
public final static int IMPROVED_QUICK = 6; d90Z,nex
public final static int MERGE = 7; 7GSV
public final static int IMPROVED_MERGE = 8; kWb2F7m
public final static int HEAP = 9; kctzNGF|
he-Ji
public static void sort(int[] data) { +"}=d3E6
sort(data, IMPROVED_QUICK); q4$+H{xB
} jWO/ xX
private static String[] name={ GK}'R=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !W'Ui 9uX
}; !k(_PM
{(#%N5%
private static Sort[] impl=new Sort[]{ Hb(B?!M)
new InsertSort(), u=NSsTP&
new BubbleSort(), j9U%7u]-k
new SelectionSort(), qXW})(
new ShellSort(), Dbaf0
new QuickSort(), ow;R$5G
new ImprovedQuickSort(), *P!e:Tm)
new MergeSort(), 3!o4)yJWx
new ImprovedMergeSort(), -/dEsgO
new HeapSort() C4#rA.nF|
}; ph|ZG6:
Ei3zBS?J)
public static String toString(int algorithm){ $]&(7@'qo
return name[algorithm-1]; NLe}Jqp
} %=<IGce
q*AQq=
public static void sort(int[] data, int algorithm) { MfBdNdox7
impl[algorithm-1].sort(data); Y'3}G<'%
} asgF1?r
FNQX7O52
public static interface Sort { 's!-80sd
public void sort(int[] data); ExXM:1 e26
} 0l#)fJo
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public static void swap(int[] data, int i, int j) { :9Y$'+ <&H
int temp = data; =}fd6ea(o
data = data[j]; @C-dG7U.P
data[j] = temp; Dli^2hD
} Ld,5iBiO:
} B 2.q3T