[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; 5e~ j
} $X{B* WF
int i1=l; jb#1&L14
int i2=mid+1; 8ItCfbqa6
for(int cur=l;cur<=r;cur++){ .YnP%X=
if(i1==mid+1) $cp16
data[cur]=temp[i2++]; FB?q/_
else if(i2>r) t1*BWY
data[cur]=temp[i1++]; >llwNT
else if(temp[i1] data[cur]=temp[i1++]; Q 37V!
else QSl:=Q'
data[cur]=temp[i2++]; v '"1/% L
} fwar8 i1
} $;KQY7
Wme1Uid
} }+QhW]nO{F
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改进后的归并排序: 9~Y)wz
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package org.rut.util.algorithm.support; LRqw\fKk[
)f:!#v(K
import org.rut.util.algorithm.SortUtil; tXb7~aO
2s]]!{Z#
/** 3=G5(0
* @author treeroot Aspj*CDu
* @since 2006-2-2 |P[D2R}
* @version 1.0 nf+"vr}1
*/ v"Ud mv"
public class ImprovedMergeSort implements SortUtil.Sort { w;h\Y+Myyk
GFy0R"&d[
private static final int THRESHOLD = 10; oto wvm
L`VQ{|&3V
/* WMdz+^\(
* (non-Javadoc) cr=FMfhB
* )sz2 9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 66Cj=n5
*/ L3hxe]mr
public void sort(int[] data) { =^%Pwkz
int[] temp=new int[data.length]; hjm.Ath
mergeSort(data,temp,0,data.length-1); d q+7K
} 4.Jaw+
9<0$mE^:
private void mergeSort(int[] data, int[] temp, int l, int r) { l#5k8+s
int i, j, k; \I o?ul}za
int mid = (l + r) / 2; Sv^'CpQ
if (l == r) [>aoDJ
return; K:lT-*+S
if ((mid - l) >= THRESHOLD) | xErA
mergeSort(data, temp, l, mid); C\hZ;Z1
else k0Vo
insertSort(data, l, mid - l + 1); LBiv]3
if ((r - mid) > THRESHOLD) b\e)PUm#u@
mergeSort(data, temp, mid + 1, r); `'WY'\|C
else l2KxZteXY0
insertSort(data, mid + 1, r - mid); Al-%j- j@-
*{p&Fy55
for (i = l; i <= mid; i++) { b6E8ase:F
temp = data; d8y=.
} 3<.j`JB@&
for (j = 1; j <= r - mid; j++) { i+ &lMgh
temp[r - j + 1] = data[j + mid]; 4|o{_g[
} aR(Z~z;C
int a = temp[l]; q0KXuMK
int b = temp[r]; J9KLO=
for (i = l, j = r, k = l; k <= r; k++) { bZ@53
if (a < b) { Xy(SzJ%
data[k] = temp[i++]; D*2p
a = temp; (k2J{6]
} else { 7<C~D,x6
data[k] = temp[j--]; WU4vb
b = temp[j]; kl{OO%jZ
} @x>$_:]
} S5[RSAbf*t
} k;Ny%%5
0f}Q~d=QL
/** '>lPq tdZ
* @param data (P52KD[A[
* @param l Ok{:QA~#
* @param i _F$t#.o
*/ +\(ay"+ d
private void insertSort(int[] data, int start, int len) { C9;X6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $\J9F=<a
} jX8C2}j
} ,knI26Jh
} a.*j8T
} $}"Wta
y2ws*IZ"
堆排序： )k%drdY{J'
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package org.rut.util.algorithm.support; j &[WE7wf
uJ5%JB("E
import org.rut.util.algorithm.SortUtil; $(mdz)Cfy
>b"z`{tE
/** {O,M}0Eg
* @author treeroot F3r
* @since 2006-2-2 qYiK bzy
* @version 1.0 PC(iqL8r
*/ 7(+ZfY~w"
public class HeapSort implements SortUtil.Sort{ `m0Uj9)#
t>|N4o
/* (non-Javadoc) )/i|"`)>_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1^"aR#
*/ C-b%PgA
public void sort(int[] data) { $j2)_(<A%Q
MaxHeap h=new MaxHeap(); +mW$D@Pf
h.init(data); #=~1hk
for(int i=0;i h.remove(); TOF62,
System.arraycopy(h.queue,1,data,0,data.length); G?1V~6
} ``)1`wx$
yt#;3
private static class MaxHeap{ sTstc+w
6rCP]YnF
void init(int[] data){ 7Mg7B
this.queue=new int[data.length+1]; KGLhl;a
for(int i=0;i queue[++size]=data; GyM%vGl 3
fixUp(size); v.&*z48
} }eRG$)'
} kvVz-PJy
rQ@o
private int size=0; cb&In<q
6f9<&dCK
private int[] queue; Y52xrIvl\
@X><lz
public int get() { 34M.xB
return queue[1]; csA.3|rv
} tnbs]6
+dpj?
public void remove() { ^dKaa
SortUtil.swap(queue,1,size--); 6e-h;ylS
fixDown(1); '# 2J?f'
} tZ24}~da
file://fixdown KK3xz*W0
private void fixDown(int k) { Wk#-LkI
int j; tSLl'XeN
while ((j = k << 1) <= size) { V>j`
if (j < size %26amp;%26amp; queue[j] j++; f9=X7"dzP
if (queue[k]>queue[j]) file://不用交换 )KQv4\0y<
break; Bo(l!G
SortUtil.swap(queue,j,k); 9NXiCP9A
k = j; d?X6x
} {h+E&u[zL
} 2s ,n!u Fd
private void fixUp(int k) { Sq]1SW3
while (k > 1) { \@" . GM%
int j = k >> 1; XFAt\g
if (queue[j]>queue[k]) BjJ gQ`X
break; YHtI%
SortUtil.swap(queue,j,k); aq| [g
k = j; Jm,X~Si
} aT1W]i
} BFu9KS+@)
a8P6-)W
} CP#MNNvgrw
R*#Q=_
} ;//qjo
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SortUtil： HCy}'}d
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package org.rut.util.algorithm; qf$|z`c
2n:J7PGD
import org.rut.util.algorithm.support.BubbleSort; qz SI cI
import org.rut.util.algorithm.support.HeapSort; =9MH
import org.rut.util.algorithm.support.ImprovedMergeSort; m;1exa
import org.rut.util.algorithm.support.ImprovedQuickSort; o*BI^4
import org.rut.util.algorithm.support.InsertSort; =qQQ^`^F'~
import org.rut.util.algorithm.support.MergeSort; `g1~ya(MC
import org.rut.util.algorithm.support.QuickSort; >~InO^R`5
import org.rut.util.algorithm.support.SelectionSort; f TtMmz
import org.rut.util.algorithm.support.ShellSort; p{PYUW"?^
4 V*)0?oYE
/** n\DT0E]
* @author treeroot 1k({(\>qq
* @since 2006-2-2 lY?d*qED
* @version 1.0 yKhzymS}T
*/ $X]v;B)J|
public class SortUtil { z:7F5!Z
public final static int INSERT = 1; ?bA]U:
public final static int BUBBLE = 2; 9}_f\Bs
public final static int SELECTION = 3; DYl{{L8@
public final static int SHELL = 4; haK5Oe/cE
public final static int QUICK = 5; tqC#_[~7
public final static int IMPROVED_QUICK = 6; ,gD i)]
public final static int MERGE = 7; oABPGyv
public final static int IMPROVED_MERGE = 8; o`Brr:
public final static int HEAP = 9; #=3]bg
7[ji,.7
public static void sort(int[] data) { C(+BrIS*
sort(data, IMPROVED_QUICK); WR1,J0UU6
} QX|K(`of
private static String[] name={ O,6!`\ND
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OaWq8MIZ-
}; KrzM]x
( mMz]b5
private static Sort[] impl=new Sort[]{ |g+5rVbd
new InsertSort(), F9hWB17u
new BubbleSort(), U\6DEnII?!
new SelectionSort(), [D\AVx&
new ShellSort(), _s,svQ8#
new QuickSort(), \OH:xW~
new ImprovedQuickSort(), 31Du@h8YX
new MergeSort(), ajr8tp'
new ImprovedMergeSort(), I{bi3y0
new HeapSort() \Y p oJ!-
}; ~5529
rP_)*)
public static String toString(int algorithm){ 2G;d2LR:
return name[algorithm-1]; |&Wo-;Ud
} y9<Fv|Ric
rJwJ5U
public static void sort(int[] data, int algorithm) { [X]o`
impl[algorithm-1].sort(data); t]XJq
} UkKpSL}Q2
^f]pK&MAmN
public static interface Sort { WLb7]rCTp
public void sort(int[] data); @I:&ozy }=
} }hxYsI"d
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public static void swap(int[] data, int i, int j) { ;wZ.p"T9^
int temp = data; fOAb?:D
data = data[j]; ny}utO
data[j] = temp; WFG/vzJ
} rK wkj)
} PN=yf@<V3F