[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; E;|\?>
} 5 + Jy
int i1=l; Sv>aZ
int i2=mid+1; x)Th2es\
for(int cur=l;cur<=r;cur++){ @%fkW"y:
if(i1==mid+1) <'vM+Lk
data[cur]=temp[i2++]; CNN?8/u!@
else if(i2>r) >C&!# 3
data[cur]=temp[i1++]; eb8_guZ
else if(temp[i1] data[cur]=temp[i1++]; 6R,;c7Izhd
else :- 5Mn3*
data[cur]=temp[i2++]; d8r+UP@#
} \Q)~'P3
} /kWWwy<
< 1r.p<s
} LaIif_fie^
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改进后的归并排序: Ud9\;Qse
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package org.rut.util.algorithm.support; AP~!YwLW
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import org.rut.util.algorithm.SortUtil; #nxx\,i>
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/** Bh.'%[',
* @author treeroot 'qD9kJ`
* @since 2006-2-2 He@= bLLa
* @version 1.0 ZEMo`O
*/ ?@,:\ ,G
public class ImprovedMergeSort implements SortUtil.Sort { z&:[.B
l00D|W_9
private static final int THRESHOLD = 10; lGz0K5P{
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/* $R5-JvJJH
* (non-Javadoc) ~iSW^mi
* axl?t|~I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "LWp/
*/ ?=G H{ %E
public void sort(int[] data) { [/kO>
int[] temp=new int[data.length]; 3_>1j
mergeSort(data,temp,0,data.length-1); 7/yd@#$X
} lu}[XN
I"!{HnSG`
private void mergeSort(int[] data, int[] temp, int l, int r) { :({<"H)!'
int i, j, k; 4CCux4)N
int mid = (l + r) / 2; 0k>&MkM\^
if (l == r) 6]3ZUH;
return; W | }Hl{}
if ((mid - l) >= THRESHOLD) 7wnzef?)
mergeSort(data, temp, l, mid); Ij8tBT?jlL
else {+EPE2X=C
insertSort(data, l, mid - l + 1); 93dotuF
if ((r - mid) > THRESHOLD) S.jjB
mergeSort(data, temp, mid + 1, r); !<)_ F
else vP2QAGk<
insertSort(data, mid + 1, r - mid); SrtmpQ
vOS0E^
for (i = l; i <= mid; i++) { }X?*o`sW
temp = data; WWLVy(
} _7<U[63
for (j = 1; j <= r - mid; j++) { :6 fQE#(s&
temp[r - j + 1] = data[j + mid]; QUDVsN#
} Ss:,#|
int a = temp[l]; +g[B &A!d+
int b = temp[r]; K_aN7?#.v`
for (i = l, j = r, k = l; k <= r; k++) { ._3NqE;
if (a < b) { .R'i=D`Pz
data[k] = temp[i++]; i=D,T[|>a
a = temp; ^&.?kJM
} else { LA+MX0*
data[k] = temp[j--]; v3"xJN_,[p
b = temp[j]; $Da^z[8e
} ?X1#b2s
} iQF}x&a<
} ~}AP@t*
{;E/l(HNI
/** (?!0__NN;
* @param data E-D5iiF
* @param l Uk9g^\H<D
* @param i GP$Y4*y/
*/ >N J$ac
private void insertSort(int[] data, int start, int len) { WdAGZUp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SS~Q;9o
} $%JyM
} t["Df;"O
} ^IH1@
} qrc/Q;$
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堆排序： }v,THj
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package org.rut.util.algorithm.support; DO1{r/Ib.{
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import org.rut.util.algorithm.SortUtil; q#`^EqtUF
f zO8by
/** }D+8K
* @author treeroot zf~zYZSr
* @since 2006-2-2 t] wM_]+
* @version 1.0 m-RY{DO+
*/ Ji[g@#
public class HeapSort implements SortUtil.Sort{ g-FZel
hhGpB$A
/* (non-Javadoc) %b;+/s2W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j!\0Fyr
*/ u2]g1XjeG
public void sort(int[] data) { #:|?t&On
MaxHeap h=new MaxHeap(); JZzf,G:
h.init(data); hH}/v0_jb
for(int i=0;i h.remove(); e9_+$Oo
System.arraycopy(h.queue,1,data,0,data.length); 6sl<Z=E#
} VWy:U#;+8
lg>AWTW[
private static class MaxHeap{ lM*O+k
2H[aY%1T
void init(int[] data){ =7fh1XnW
this.queue=new int[data.length+1]; "ru1;I
for(int i=0;i queue[++size]=data; (N|xDl&;
fixUp(size); &o@5%Rz2/
} ]4mj 1g&C
} PAV2w_X~
~iZF~PQ1_
private int size=0; HDyZzjgG
\STvBI?
private int[] queue; Qu FCc1Q
X.l"f'`l
public int get() { [!?,TGM}^
return queue[1]; -/c1qLdQ
} j#P4Le[t
tcEf ~|3
public void remove() { lO> 7`2x=F
SortUtil.swap(queue,1,size--); HF+fk*_Q
fixDown(1); ' u};z:t
} sDm},=X}
file://fixdown y%bqeo L~
private void fixDown(int k) { Os 2YZ<t
int j; \BaN5+B6
while ((j = k << 1) <= size) { ',`4 U F
if (j < size %26amp;%26amp; queue[j] j++; J7;n;Mx
if (queue[k]>queue[j]) file://不用交换 V C'-h~
break; !a(qqZ|s
SortUtil.swap(queue,j,k); ( L\G!pP.
k = j; <S@mQJS!y
} ' 5 qL
} )^S^s>3
private void fixUp(int k) { Z?c=t-yqp
while (k > 1) { 8sF0]J[g{
int j = k >> 1; `Mn{bd
if (queue[j]>queue[k]) h;UdwmT
break; a~>0JmM+N
SortUtil.swap(queue,j,k); iH}rI'U.
k = j; nQ!#G(_nO
} , gr&s+
} OGi4m |
eKpxskbhZ
} _<F@(M5
TgE.=`"7
} f9XO9N,hE:
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SortUtil： rn[}{1I33Q
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package org.rut.util.algorithm; }:l%,DBw
5YG@[ic
import org.rut.util.algorithm.support.BubbleSort; K[a<
import org.rut.util.algorithm.support.HeapSort; _B7?C:8Q-
import org.rut.util.algorithm.support.ImprovedMergeSort; YSz$` 7i
import org.rut.util.algorithm.support.ImprovedQuickSort; ?CW^*So
import org.rut.util.algorithm.support.InsertSort; P}WhE
import org.rut.util.algorithm.support.MergeSort; *o\Y~U-so
import org.rut.util.algorithm.support.QuickSort; u:H 3.5)%
import org.rut.util.algorithm.support.SelectionSort; }V#9tWW
import org.rut.util.algorithm.support.ShellSort; h:Mn$VR,
p C2c(4
/** lyH X#]
* @author treeroot )tI2?YIR
* @since 2006-2-2 JvWs/AG1
* @version 1.0 {S"
*/ 2\CkX
public class SortUtil { q'AnI$!
public final static int INSERT = 1; F;&fx(
public final static int BUBBLE = 2; A"<)(M+kG
public final static int SELECTION = 3; ^%8Hvy
public final static int SHELL = 4; {p*hNi)0
public final static int QUICK = 5; -f;j1bQ
public final static int IMPROVED_QUICK = 6; O$umu_
public final static int MERGE = 7; i_'R"ob{S
public final static int IMPROVED_MERGE = 8; c>WpOZ,
public final static int HEAP = 9; UFIAgNKl
Up/u|A$0V
public static void sort(int[] data) { :*&9TNUE@
sort(data, IMPROVED_QUICK); voej ~z+
} )4F/T,{;m
private static String[] name={ 7~l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #9hXZr/8
}; 5IE+M
+?5Uy*$
private static Sort[] impl=new Sort[]{ HHIUl,P
new InsertSort(), kSDa\l!W]
new BubbleSort(), &(uF&-PwO4
new SelectionSort(), WP@JrnxO\`
new ShellSort(), w{zJE]7
new QuickSort(), ",aT<lw.
new ImprovedQuickSort(), pW3)Y5/D
new MergeSort(), \l=KWa3Q
new ImprovedMergeSort(), AR+\uD=\I-
new HeapSort() 2) /k`Na
}; ;/)Mcx]n
& L.PU@
public static String toString(int algorithm){ ?;r8SowZ7
return name[algorithm-1]; +%le/Pg@
} rPo\Dz
/VmCN]2AZ
public static void sort(int[] data, int algorithm) { |<$<L`xoe
impl[algorithm-1].sort(data); gM;)
} `3sy>GU?
@^:7UI_
public static interface Sort { j_6`s!Yw
public void sort(int[] data); LE0J ;|1
} k qY3r &
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public static void swap(int[] data, int i, int j) { z"s%#/#
int temp = data; mS)|6=Y
data = data[j]; J^g,jBk
data[j] = temp; 0,~6TV<K
} GOZQ5m -
} q(jkit~`A