[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; RoV^sbWFt
} V/X4WZs|i
int i1=l; k<aKT?Ek>
int i2=mid+1; cs'ylGH
for(int cur=l;cur<=r;cur++){ (=hXt=hZ
if(i1==mid+1) Xz,-'
data[cur]=temp[i2++]; >zYO1.~
else if(i2>r) :xn/9y+s
data[cur]=temp[i1++]; S7{L-"D=y
else if(temp[i1] data[cur]=temp[i1++]; ~FnB!Mh}?
else v!\\aG/
data[cur]=temp[i2++]; <M(Jqb cWa
} {o2pCH
} 5Ocd2T'
+(v<_#wR-
} qH3<,s*
b)7uz>I
改进后的归并排序: j"FX ?|4
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package org.rut.util.algorithm.support; gmU_# J%~
h/I'9&J>*
import org.rut.util.algorithm.SortUtil; I! s&m%s
^tWt"GgC
/** -8sm^A>C
* @author treeroot u/`jb2eEU:
* @since 2006-2-2 yc./:t1at>
* @version 1.0 3kAmRU
*/ ?^F*M#%?
public class ImprovedMergeSort implements SortUtil.Sort { Kk5 vC{
ls5s}X
private static final int THRESHOLD = 10; ]zGgx07d
ooJ ^8L
/* JfJUOaL
* (non-Javadoc) +-b:XeHSZ
* ~Wh}W((L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s[{L.9Y
*/ =5NM =K
public void sort(int[] data) { TTg>g~t`
int[] temp=new int[data.length]; @]*b$6tt
mergeSort(data,temp,0,data.length-1); v&BKl
} gv&%2e}_
JNQiCK,)}M
private void mergeSort(int[] data, int[] temp, int l, int r) { [kdt]+'+
int i, j, k; F-!,U)
int mid = (l + r) / 2; 7qfo%n"
if (l == r) X!+#1NPM
return; vmI2o'zi
if ((mid - l) >= THRESHOLD) h@{U>U7
mergeSort(data, temp, l, mid); s|7(VUPL
else ;>*l?m-S@n
insertSort(data, l, mid - l + 1); OBGA~E;%
if ((r - mid) > THRESHOLD) 3t
mergeSort(data, temp, mid + 1, r); GCN(
else Qt+|s&HGt
insertSort(data, mid + 1, r - mid); ./_o+~\e'
W)3IS&;P
for (i = l; i <= mid; i++) { Of)EBa<5^
temp = data; v 4@=>L
} 1<hj3
for (j = 1; j <= r - mid; j++) { s?;rP,{:p
temp[r - j + 1] = data[j + mid]; b9M.p*!
} Q'f!392|
int a = temp[l]; 1WGcv O)<
int b = temp[r]; kcy?;b;z
for (i = l, j = r, k = l; k <= r; k++) { &^ECQ
if (a < b) { X[L6Av
data[k] = temp[i++]; ISHNeO8
a = temp; 3"28=)o
} else { 5):2;hk
data[k] = temp[j--]; l_ycYD$ZA
b = temp[j]; O34'c_ fZ
} AJ'YkSg
} R[eQ}7;+
} l3Vw?f
8 *@knkJ
/** s1,kTde
* @param data <8UqV.&
* @param l VGbuEC[Y
* @param i _Je k;N
*/ ;p~&G"-C`
private void insertSort(int[] data, int start, int len) { eySV -f{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FA 1E`AdU
} <VP@#
} R} nY8zE
} ;Qpp[V`
} S~WsGLF s
[m*=Q
堆排序： n\v\<mVTb7
:Jp$_T&E
package org.rut.util.algorithm.support; z7+y{-{Z
([loWr}QR
import org.rut.util.algorithm.SortUtil; wAHW@q9CK
PV?XpT
/** :tP:X+?O
* @author treeroot %N\pfZ2\
* @since 2006-2-2 !"u) `I2
* @version 1.0 Nrl&"IK|J
*/ S>~QuCMY
public class HeapSort implements SortUtil.Sort{ /yHM=&Vg]
WNkAI9B
/* (non-Javadoc) qzv$E;zAl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8i!~w 7z
*/ uq;,h46ki
public void sort(int[] data) { H \$04vkR
MaxHeap h=new MaxHeap(); kc&>l(
h.init(data); RulZh2C
for(int i=0;i h.remove(); n7~!klF-
System.arraycopy(h.queue,1,data,0,data.length); 'L#qR)t
} |RqCw7
{p-b,J9~a
private static class MaxHeap{ :[gM 5G
8+Lig
void init(int[] data){ 5TlPs_o
this.queue=new int[data.length+1]; '>:mEXK}w
for(int i=0;i queue[++size]=data; sa\v9
fixUp(size); xwxMVp`|o
} ybBLBJb
} Qh%(yL!
}Sa2s&[<
private int size=0; #pJ^w>YNy
J-g#zs
private int[] queue; EUdu"'=4a
7+aTrE{
public int get() { /kLX f_
return queue[1]; n8"S;:Zm
} Ba/Z<1)
H27J kZ&
public void remove() { zuOx@T^
SortUtil.swap(queue,1,size--); ?'H);ou-p
fixDown(1); /kGRN@
} ^n5[pF}Gw
file://fixdown M70Xdn
private void fixDown(int k) { A:3bL: ;t
int j; VNx|nP&
while ((j = k << 1) <= size) { 8ID fYJ
if (j < size %26amp;%26amp; queue[j] j++; 0*^)n&O
if (queue[k]>queue[j]) file://不用交换 V.;,1%
break; )L#C1DP#
SortUtil.swap(queue,j,k); >V:g'[b
k = j; (80#{4kl
} -d\O{{%>.z
} _5Q?]-M
private void fixUp(int k) { >8;Co]::kx
while (k > 1) { 4ew|5Zex.~
int j = k >> 1; T*>n a8W
if (queue[j]>queue[k]) _H|c_
break; S5ka;g
SortUtil.swap(queue,j,k); Xz5 aTJ&
k = j; gP.Q_/V
} T{M~*5$
} DB'pRo+U
}Jt( H
} <Gzy*1Q&
m`UNdFS
} Z~o*$tF/
)AOD~T4s7
SortUtil： !Y_"q^5GG'
TDg#O!DUF
package org.rut.util.algorithm; }~dXz?{p8
'>[KVvm
import org.rut.util.algorithm.support.BubbleSort; Mn+;3qo{6
import org.rut.util.algorithm.support.HeapSort; BDY@&vF
import org.rut.util.algorithm.support.ImprovedMergeSort; }x4,a6^
import org.rut.util.algorithm.support.ImprovedQuickSort; ,J?Hdy:R
import org.rut.util.algorithm.support.InsertSort; ~uRG~,{rH
import org.rut.util.algorithm.support.MergeSort; <by}/lF0
import org.rut.util.algorithm.support.QuickSort; o[*</A }
import org.rut.util.algorithm.support.SelectionSort; '2=u<a B
import org.rut.util.algorithm.support.ShellSort; O4FW/)gq
'>> IMF
/** W#|]m=2W
* @author treeroot vrXmzq
* @since 2006-2-2 B?c9cS5Mj
* @version 1.0 ITh1|yP
*/ haW8zb0z
public class SortUtil { :qy`!QPUm
public final static int INSERT = 1; }gL9G
public final static int BUBBLE = 2; l5S(xQ
public final static int SELECTION = 3; UwY<3ul
public final static int SHELL = 4; RsU=fe,
public final static int QUICK = 5; +uW$/_Y$
public final static int IMPROVED_QUICK = 6; N)A?*s'v~
public final static int MERGE = 7; qWe1`.o
public final static int IMPROVED_MERGE = 8; CtVY;eG
public final static int HEAP = 9; ,LZ6Wu$P
L1*P<Cb
public static void sort(int[] data) { ^pMjii8IZ
sort(data, IMPROVED_QUICK); _GK^7}u
} Q17"hO>kC
private static String[] name={ ZC3b9:tk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4*OL^\%
}; vOsd>3"
cs`/^2Vf"#
private static Sort[] impl=new Sort[]{ Y."ujo#bB
new InsertSort(), ~u1ox_v`%(
new BubbleSort(), V ?3>hQtB
new SelectionSort(), a_I!2w<I
new ShellSort(), a8aEZ724
new QuickSort(), qVC_K/w 7
new ImprovedQuickSort(), boo,KhW'Y
new MergeSort(), evPr~_
new ImprovedMergeSort(), tA$,4B?
new HeapSort() WZ5[tZf
}; Mw7!w-1+
+Tc4+q!
public static String toString(int algorithm){ "5e~19
return name[algorithm-1]; >]Hz-2b
} @~fg[)7M
MK[l*=\s
public static void sort(int[] data, int algorithm) { /ee:GjUkB
impl[algorithm-1].sort(data); >ZkcL7t9
} 4cL NPl<
Mm-FdP m
public static interface Sort { n1o/-UY
public void sort(int[] data); l.1)%q&@^
} @``kt*+K+
+Uq9C-Iu
public static void swap(int[] data, int i, int j) { g~.,-V}
int temp = data; Y5=~>*e
data = data[j]; !U}A1)
data[j] = temp; @B ~![l
} +GI[ Kq
} +FQ:Q+