[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; ^/+sl-6/F
} g[$B90
int i1=l; x<l1s
int i2=mid+1; }B5I#Af7
for(int cur=l;cur<=r;cur++){ PX'LN
if(i1==mid+1) Dz{e@+>M
data[cur]=temp[i2++]; a !IH-XJ2
else if(i2>r) ZUu^==a
data[cur]=temp[i1++]; W< n`[
else if(temp[i1] data[cur]=temp[i1++]; 9NT;^K^I
else i_MI!o
data[cur]=temp[i2++]; \x!>5Z Y
} LWI~m2
} @FTi*$Ix
cNVdGY%&
} "Wm~\)t(
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改进后的归并排序: ~JXHBX
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package org.rut.util.algorithm.support; g{%';
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import org.rut.util.algorithm.SortUtil; o;[oy#aWl_
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/** g|P hNo
* @author treeroot "jHN#}
* @since 2006-2-2 CytpL`&^]
* @version 1.0 pR"qPSv'
*/ -db+Y:xUZ
public class ImprovedMergeSort implements SortUtil.Sort { z)%1i
lK4+8VZ
private static final int THRESHOLD = 10; 4(R2V]
fo.m&mKgo
/* +[ItkfSod!
* (non-Javadoc) nR7\ o(!
* e0L;V@R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,:`6x[ +
*/ '!R,)5l0h
public void sort(int[] data) { T?Y\~.+99
int[] temp=new int[data.length]; _#C}hwOR>X
mergeSort(data,temp,0,data.length-1); Xo`1#6xsE
} 'm|m+K83
{#,FlR2
private void mergeSort(int[] data, int[] temp, int l, int r) { +2SX4Kxu
int i, j, k; Iqsk\2W]a3
int mid = (l + r) / 2; qC)VT3
if (l == r) .N=hA
return; qj&)w9RLJE
if ((mid - l) >= THRESHOLD) jO55<s94
mergeSort(data, temp, l, mid); mV,R0olF
else ^aXBt
insertSort(data, l, mid - l + 1); z(3"\ ^T
if ((r - mid) > THRESHOLD) 8|({ _Z
mergeSort(data, temp, mid + 1, r); MxRU6+a
else j;)6uia*A
insertSort(data, mid + 1, r - mid); qedGBl&
MbfzGYA2~
for (i = l; i <= mid; i++) { Y9;Mey*oW
temp = data; ?_aR-[XRg
} spJ(1F{|V
for (j = 1; j <= r - mid; j++) { Q$1K{14I
temp[r - j + 1] = data[j + mid]; Nd!VR+IZ
} vi8~j
int a = temp[l]; ^>Y%L(>
int b = temp[r]; &r%*_pX
for (i = l, j = r, k = l; k <= r; k++) { ~-5@- V
if (a < b) { D,\=zX;
data[k] = temp[i++]; prtxE&-
a = temp; k`TJ<Dv;
} else { (GG"'bYk
data[k] = temp[j--]; 2~V Im#
b = temp[j]; >Mw &Tw}o
} #ja`+w}
} P0xLx
} !dY:S';~
bZ.N7X PH
/** +ZKhmb!
* @param data iwQ-(GjM[A
* @param l 9Yyg}l:
* @param i K;[%S
*/ rf->mk{
private void insertSort(int[] data, int start, int len) { f_ztnRw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;YDF*~9u
} hyiMOa
} pm]DxJ@
} .KucjRI
} LUck>l\l
"<x~{BN?
堆排序： lGUV(D
oDP((I2-
package org.rut.util.algorithm.support; </gp3WQ.
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import org.rut.util.algorithm.SortUtil; iIaT1i4t.
9T2A)a]0
/** zpqGh
* @author treeroot )7GLS\uf<%
* @since 2006-2-2 GQ2PmnV+
* @version 1.0 @b\ S.
*/ .vS6_
public class HeapSort implements SortUtil.Sort{ 1?|6odc
b$O_L4CP
/* (non-Javadoc) JA(fam~{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RX5.bVp eE
*/ kLt9;<L
public void sort(int[] data) { ;#s}b1
MaxHeap h=new MaxHeap(); S9R]Zl7{-
h.init(data); k0_$M{@Y
for(int i=0;i h.remove(); qQOD
System.arraycopy(h.queue,1,data,0,data.length); _1<'"u#6w
} tRnW%F5
{Y91vXTz7
private static class MaxHeap{ 6@q[tN7_^
oL'1Gm@X?
void init(int[] data){ .3<IOtD=
this.queue=new int[data.length+1]; l(,;wAH
for(int i=0;i queue[++size]=data; ;{f??G
fixUp(size); ZuvPDW%
} @GQ8q]N:<
} VtO;UN
dAr)%RZ
private int size=0; g'ZMV6b?K
UIOEkQ\Wl
private int[] queue; Z.':&7Y
ggI=I<7M
public int get() { /%YiZ#
return queue[1]; E0eQ9BXh
} ]1d,O^S
^8NLe9~p3?
public void remove() { HCG@#W<wc
SortUtil.swap(queue,1,size--); [z%?MIT
fixDown(1); zk5=Opmvh
} 0[:9 Hb6
file://fixdown Ae j
private void fixDown(int k) { K- I\P6R`
int j; D!}K)T1~R
while ((j = k << 1) <= size) { ) wY!/&
if (j < size %26amp;%26amp; queue[j] j++; g&+Y{*Gp
if (queue[k]>queue[j]) file://不用交换 qC1U&b#MVx
break; H5rPq_R
SortUtil.swap(queue,j,k); P:(EU s}0
k = j; .L7Yf+yFg
} /^LH
} *SkiFEoD
private void fixUp(int k) { j\'+wVyo
while (k > 1) { px|>v8
int j = k >> 1; 1Vf78n
if (queue[j]>queue[k]) oY%"2PW1B
break; vZE|Z[M+<
SortUtil.swap(queue,j,k); 9G#8%[W
k = j; b>QM~mq3^I
} tyuk{*Me:
} 3gG+`{<
cRh\USS
} C~{NKMeC/m
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} =0h|yjnL/
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SortUtil： Wk`bb!P_
1GG>.RCP
package org.rut.util.algorithm; ^r>f2 x
x^)g'16`
import org.rut.util.algorithm.support.BubbleSort; ]Y4q'KH
import org.rut.util.algorithm.support.HeapSort; EK?@Z.q+
import org.rut.util.algorithm.support.ImprovedMergeSort; ;h9-}F
import org.rut.util.algorithm.support.ImprovedQuickSort; aGB0-;.t7
import org.rut.util.algorithm.support.InsertSort; "mPSA Z
import org.rut.util.algorithm.support.MergeSort; N^h|h
import org.rut.util.algorithm.support.QuickSort; 4[TS4p
import org.rut.util.algorithm.support.SelectionSort; -c+[6A>j
import org.rut.util.algorithm.support.ShellSort; B;z;vrrL
=6cyE
/** nAo8uWG
* @author treeroot -uA3Y
* @since 2006-2-2 5^i.;>(b
* @version 1.0 EkJVFHfh
*/ }_{y|NW
public class SortUtil { e9CP802#2
public final static int INSERT = 1; JFkN=YR8
public final static int BUBBLE = 2; kSB
public final static int SELECTION = 3; #K=b%;>
public final static int SHELL = 4; *8$>Whr
public final static int QUICK = 5; ud0QZ X
public final static int IMPROVED_QUICK = 6; #^|| ]g/N
public final static int MERGE = 7; F:M>z=
public final static int IMPROVED_MERGE = 8; HLjvKE=W
public final static int HEAP = 9; z)4UMR#b&
U/ ?F:QD4
public static void sort(int[] data) { QVIcb;&:}
sort(data, IMPROVED_QUICK); h&lyxYZ+T$
} "\}b!gl$8
private static String[] name={ ,{k<JA{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ri|k<io
}; bb|}'
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private static Sort[] impl=new Sort[]{ 60"5?=D
new InsertSort(), -Q6(+(7_|
new BubbleSort(), pe|X@o
new SelectionSort(), 0|g[o:;fl_
new ShellSort(), U+-F*$PO+
new QuickSort(), pvlDjj}
new ImprovedQuickSort(), 'X9AG6K1
new MergeSort(), tKwn~T
new ImprovedMergeSort(), F8;mYuA
new HeapSort() G.E[6G3
}; dUIqDl
xcst<=
public static String toString(int algorithm){ %NNj9Bl<VV
return name[algorithm-1]; ;_}~%-_ ~
} 6Lb{r4^
oz LH]*
public static void sort(int[] data, int algorithm) { H nK!aa
impl[algorithm-1].sort(data); j1/+\8Y
} /0(%(2jIWl
a"x}b
public static interface Sort { 8) HBh7/
public void sort(int[] data); (~JwLe@a
} !NTH.U:g
O$^xkv5.
public static void swap(int[] data, int i, int j) { +~N!9eMc
int temp = data; J96uyS*
data = data[j]; =J](.78
data[j] = temp; V@[rf<,
} z`4c 4h]I
} AotCX7T2T