[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; eka<mq|W
} V'b$P2 ?^
int i1=l; >^Rkk{cc
int i2=mid+1; 5<64 C}fE3
for(int cur=l;cur<=r;cur++){ w{F{7X$^
if(i1==mid+1) PU8>.9x
data[cur]=temp[i2++]; u%m,yPU~B
else if(i2>r) JR6r3W
data[cur]=temp[i1++]; fh%|6k?#M
else if(temp[i1] data[cur]=temp[i1++]; 4# +i\H`
else WSEw:pln
data[cur]=temp[i2++]; )+GwYt
} )?`G"(y
} 7b8+"5~
2F7(Y)
} P^'TI[\L9
6_mkt|E=
改进后的归并排序: i?{)o]i
jD}G9=[$1
package org.rut.util.algorithm.support; ?iXN..6x
_c!$K#Yl{
import org.rut.util.algorithm.SortUtil; xP{)+$n
t;HM
/** sdp3geBYo
* @author treeroot #jj+/>ZOi
* @since 2006-2-2 `;j@v8n$*
* @version 1.0 HQkK8'\LP
*/ 7l(GBr
public class ImprovedMergeSort implements SortUtil.Sort { jw5ldC>U
'G>$W+lT^
private static final int THRESHOLD = 10; )kMF~S|H
0RZ[]:(
/* Wn%b}{9Fb
* (non-Javadoc) Cer&VMrQK
* = Ed0vw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mNA=<O;i)'
*/ ;yu#Bs
public void sort(int[] data) { J7;8 S
int[] temp=new int[data.length]; 3xIelTf*
mergeSort(data,temp,0,data.length-1); /7N&4FrG
} }3O 0nab
2A=q{7s
private void mergeSort(int[] data, int[] temp, int l, int r) { ]?G|:Kx$y%
int i, j, k; xmNs%
int mid = (l + r) / 2; V O\g"Yc
if (l == r) sOJXloeO[6
return; Fy 1- >~
if ((mid - l) >= THRESHOLD) ;rRV=$y
mergeSort(data, temp, l, mid); 38mC+%iC
else C4aAPkcp2$
insertSort(data, l, mid - l + 1); lrjVD(R=g
if ((r - mid) > THRESHOLD) :%-w/QwTR
mergeSort(data, temp, mid + 1, r); ~&<Ls
else }el7@Gv
insertSort(data, mid + 1, r - mid); E1j3c :2
bWgRGJqt
for (i = l; i <= mid; i++) { ${)oi:K@:
temp = data; uG$*DeZti
} 4mHk,Dd9,
for (j = 1; j <= r - mid; j++) { $\+x7"pI
temp[r - j + 1] = data[j + mid]; +70x0z2
} h+R26lI1x
int a = temp[l]; b4qMTRnv
int b = temp[r]; YP Qix
for (i = l, j = r, k = l; k <= r; k++) { a]/KJn/B(
if (a < b) { 1}_4C0h\'
data[k] = temp[i++]; W)Ct*I^
a = temp; UgLFU#
} else { A.vf)hO
data[k] = temp[j--]; PI.Zd1r
b = temp[j]; QWc,JCu
} KKq%'y)u^
} $cWt^B'
} ck< `kJ`b
~t<G gNI
/** .?vHoNvo
* @param data 8y']kVg
* @param l -UM|u_
* @param i zpD?5
*/ k Nvb>v
private void insertSort(int[] data, int start, int len) { bcq&yL'D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7YxVtN
} 8_VGB0~3i
} '&+]85_&$
} _7z]zy@PC5
} {O:{F?
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堆排序： j1;<3)%0
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package org.rut.util.algorithm.support; >F>VlRg
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import org.rut.util.algorithm.SortUtil; h'HI92; [
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/** d>?C?F
* @author treeroot 9Fy'L#%
* @since 2006-2-2 le' Kp V
* @version 1.0 OwT_W)$
*/ A=0{}B#
public class HeapSort implements SortUtil.Sort{ Y7zs)W8xTT
l$Vy\CfK3n
/* (non-Javadoc) xL*J9&~iG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HC}vO0X4
*/ \HIBnkj)3n
public void sort(int[] data) { !?>QN'p.b
MaxHeap h=new MaxHeap(); vV xw*\`<6
h.init(data); 74ho=
for(int i=0;i h.remove(); qyxd9Lk1
System.arraycopy(h.queue,1,data,0,data.length); E~#G_opQA
} `KtP;nG
.*f6n|
private static class MaxHeap{ ?em8nZ'
_9]vlxgtG(
void init(int[] data){ -wrVEH8
this.queue=new int[data.length+1]; { "M2V+ep
for(int i=0;i queue[++size]=data; 41]a{A7q
fixUp(size); ol41%q*
} '}9 Nvr)+
} 7H09\g&
{?Nm"#
private int size=0; PZQAlO,
^.R!sQ
private int[] queue; eKy!Pai
w\MWr+4
public int get() { 4/%fpU2
return queue[1]; t V( WhP
} I eJI-lo
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public void remove() { :._Igjj$=
SortUtil.swap(queue,1,size--); 8h0CG]
fixDown(1); z"T+J?V/
} sfipAM
file://fixdown qFK.ULgP`
private void fixDown(int k) { ht*(@MCr<
int j; \i/HHP[%
while ((j = k << 1) <= size) { ~&<t++ g
if (j < size %26amp;%26amp; queue[j] j++; =
if (queue[k]>queue[j]) file://不用交换 IA<>+NS
break; vQ*RrHG?c
SortUtil.swap(queue,j,k); `kJ)E;v;3
k = j; ]\KVA)\
} ^8EW/$k
} xxyc^\$
private void fixUp(int k) { $cK}Tlq
while (k > 1) { mZ2CGOR
int j = k >> 1; :{N*Z}]
if (queue[j]>queue[k]) U#cGd\b
break; 'iF%mnJ
SortUtil.swap(queue,j,k); f]#\&"
k = j; p:TE##
} }ymW};W
} ^utOVi
p@kRo#~l
} $cIaLq
A"ATtid
} nhdZC@~E0
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SortUtil： F \ls]luN
]:#=[CH
package org.rut.util.algorithm; J/jkb3
/6Q]f
import org.rut.util.algorithm.support.BubbleSort; "o+?vx-
import org.rut.util.algorithm.support.HeapSort; cz,QP'g
import org.rut.util.algorithm.support.ImprovedMergeSort; ]7Du/)$
import org.rut.util.algorithm.support.ImprovedQuickSort; Cyd/HTNh<
import org.rut.util.algorithm.support.InsertSort; ]}PXN1(
import org.rut.util.algorithm.support.MergeSort; pHmqwB~|
import org.rut.util.algorithm.support.QuickSort; ;YR/7
import org.rut.util.algorithm.support.SelectionSort; Gn=b_!
import org.rut.util.algorithm.support.ShellSort; 4P[MkMoC
kBhjqI*
/** u{_,S3Aa
* @author treeroot {daX?N|V
* @since 2006-2-2 #%Bt!#
* @version 1.0 ?[d4HKs
*/ >({qgzV`
public class SortUtil { m_*wqNFA6
public final static int INSERT = 1; z`IW[N7Z
public final static int BUBBLE = 2; :Bmn<2[Y;
public final static int SELECTION = 3; [:{ FR2*x
public final static int SHELL = 4; 8 7(t<3V&
public final static int QUICK = 5; {7jim
public final static int IMPROVED_QUICK = 6; a51e~mg Z`
public final static int MERGE = 7; !Pw*p*z
public final static int IMPROVED_MERGE = 8; |J,zU6t
public final static int HEAP = 9; aSvv(iV
!Ztqh Xr
public static void sort(int[] data) { _]OY[&R
sort(data, IMPROVED_QUICK); QZ l#^-on
} o *J*}y
private static String[] name={ #Z1-+X8P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mA{?E9W
}; udqrHR5
TG}owG]]
private static Sort[] impl=new Sort[]{ y62f{ks_/
new InsertSort(), sJ|pR=g)!
new BubbleSort(), >9!J?HA
new SelectionSort(), h40;Q<D
new ShellSort(), 0WC\uxT7
new QuickSort(), S~);
new ImprovedQuickSort(), (O{OQk;CF
new MergeSort(), w2.] 3QAZ
new ImprovedMergeSort(), .qSDe+A
new HeapSort() M!'d
}; u:f ]|Q
,fp+nu8,
public static String toString(int algorithm){ UqI #F
return name[algorithm-1]; 7S}0Kuk)
} VkFh(Br<{
4%J0e'iN
public static void sort(int[] data, int algorithm) { _#sy
impl[algorithm-1].sort(data); uP'L6p5
} uC;_?Bve
3<&:av3
public static interface Sort { YSeH;<'
public void sort(int[] data); >`0U2K
} \W.CHSD
zuLW'a6F-
public static void swap(int[] data, int i, int j) { K khuPBd2
int temp = data; rNq*z,
data = data[j]; ?Z 2,?G
data[j] = temp; iSCkV2
} `-uE(qp
} ^wolY0p