[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; ~wF3$H.@;
} .{ZJywE<
int i1=l; J7C?Z
int i2=mid+1; HG< z,gE 2
for(int cur=l;cur<=r;cur++){ -T i<H9OV
if(i1==mid+1) IW>~Yl?
data[cur]=temp[i2++]; B/qN1D]U.
else if(i2>r) l'M/et{:
data[cur]=temp[i1++]; Q+wO\TtE
else if(temp[i1] data[cur]=temp[i1++]; U;*t5l
else sDR Av%w
data[cur]=temp[i2++]; YJ-<t6
} + !"YC
} xpCZlOld
7[uN;B#V
} 'r ^.Ao5
w{lj'3z I
改进后的归并排序: r%WHYhD
Oo-4WqRJ
package org.rut.util.algorithm.support; tQYV4h\Qj
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import org.rut.util.algorithm.SortUtil; 2{Dnfl'k
<#;5)!gr{
/** Qds:*]vGS
* @author treeroot UZmUYSu;
* @since 2006-2-2 B0Ay
* @version 1.0 Mw"[2PA
*/ 8a]g>g
public class ImprovedMergeSort implements SortUtil.Sort { 7=yjd)Iy9m
w^^l,
private static final int THRESHOLD = 10; ,3iD/8_
0v9i43[S|J
/* n/ :#:
* (non-Javadoc) Iw`|,-|
* jcvq:i{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _?y3&4N)
*/ |Kjfh};-C
public void sort(int[] data) { xLLTp7b(
int[] temp=new int[data.length]; 'p\&Mc_Gu
mergeSort(data,temp,0,data.length-1); Cg%Owe/E?0
} $T:;KcW)
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private void mergeSort(int[] data, int[] temp, int l, int r) { iOCs%J
int i, j, k; ;K|K]c
int mid = (l + r) / 2; f2pA+j5[
if (l == r) ^c/3!"wK
return; <gGO
if ((mid - l) >= THRESHOLD) b<#zgf
mergeSort(data, temp, l, mid); SK&1l`3
else t9*e"QH
insertSort(data, l, mid - l + 1); (3Xs
if ((r - mid) > THRESHOLD) [{R>'~
mergeSort(data, temp, mid + 1, r); Z]WX 7d
else __s'/6u
insertSort(data, mid + 1, r - mid); |,S]EHIy
nUVk;0at
for (i = l; i <= mid; i++) { w-$iKtb.
temp = data; V@s93kh
} ,)!%^~v
for (j = 1; j <= r - mid; j++) { ntB#2S
temp[r - j + 1] = data[j + mid]; ,quUGS
} BFP@Yn~k
int a = temp[l]; {oF;ZM'r
int b = temp[r]; Vr"'O6
for (i = l, j = r, k = l; k <= r; k++) { ^+-]V9?+
if (a < b) { s]`6uyW"
data[k] = temp[i++]; 2M\7j
a = temp; n@h$V\&\iM
} else { `F1Yfm jZT
data[k] = temp[j--]; yS:w>xU @<
b = temp[j]; ~;pP@DA
} B0p;Zh
} _3N,oCRm
} T][c^K*
l+@k:IK
/** +t1+1Zv
* @param data QmGK! H>3
* @param l l Le&q
* @param i "X._:||8
*/ U(x$&um(l
private void insertSort(int[] data, int start, int len) { y!:vX6l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zFipuG02
} \L$]2"/v-
} 8tf>G(I{
} ]]`[tVaFr
} Z,\(bW qF
N%q{CYF6
堆排序： ;14Q@yrZ0
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package org.rut.util.algorithm.support; sh0x<_
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import org.rut.util.algorithm.SortUtil; 7<(U`9W/q
hH-!3S2'
/** 59:kL<;S-
* @author treeroot "R-j
* @since 2006-2-2 oRcP4k;d=
* @version 1.0 n ~&ssFC
*/ wv\"(e7(
public class HeapSort implements SortUtil.Sort{ r4gLoHD)
'Z,7{U1P
/* (non-Javadoc) *%_M?^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xkx&'/QG,U
*/ pNuU{:9 B0
public void sort(int[] data) { nehk8+eV_
MaxHeap h=new MaxHeap(); F.(e}EMyNh
h.init(data); n!~QC
for(int i=0;i h.remove(); 0R+p\Nc&1
System.arraycopy(h.queue,1,data,0,data.length); wt'"<UN
} ){u# (sW
j5[>HL
private static class MaxHeap{ 1|G5 W:
p14$XV
void init(int[] data){ k%-UW%
this.queue=new int[data.length+1]; ?$<~cD" Sw
for(int i=0;i queue[++size]=data; CI \O)iB
fixUp(size); Bd;EI)JT
} \>w 2D
} L"?4}U:
L8zMzm=-
private int size=0; x2l}$(7
N>P" $
private int[] queue; f4dHOH
prIJjy-F
public int get() { Oq3t-omXS
return queue[1]; !^1oH**
} @^-f+o
}095U(@
public void remove() { ov\%*z2=
SortUtil.swap(queue,1,size--); 673G6Nk
fixDown(1); Zw/??Tq b
} cZrJW
file://fixdown yd45y}uS;F
private void fixDown(int k) { U}=H1f,
int j; M3GFKWQI,`
while ((j = k << 1) <= size) { 6OQ\f,h@
if (j < size %26amp;%26amp; queue[j] j++; (f#{<^gd
if (queue[k]>queue[j]) file://不用交换 JE$$6X
break; LA6Ik_-F
SortUtil.swap(queue,j,k); rXe+#`m2
k = j; eB,@oo%
} Tn38]UL
} %F;uW[4r
private void fixUp(int k) { z!~{3M
while (k > 1) { }y*rO(cu7G
int j = k >> 1; 9~iDL|0'~
if (queue[j]>queue[k]) 5:EE%(g9
break; 0d`lugf
SortUtil.swap(queue,j,k); ?4Zo0DiUB
k = j; #X5Tt ;
} N$ 2Iz
} vDc&m
*iPBpEWC
} N$Tzxs
n.P$E
} f-}_
+]VW[$W
SortUtil： . vea[
8{CBWXo$)
package org.rut.util.algorithm; pSpxd|k
GMob&0l8_
import org.rut.util.algorithm.support.BubbleSort; HuD~(CI.
import org.rut.util.algorithm.support.HeapSort; O0mQHpi:
import org.rut.util.algorithm.support.ImprovedMergeSort; AAc2u^spx
import org.rut.util.algorithm.support.ImprovedQuickSort; +2s][^-KV
import org.rut.util.algorithm.support.InsertSort; z}7U>y6`
import org.rut.util.algorithm.support.MergeSort; E `%*lGu_
import org.rut.util.algorithm.support.QuickSort; P$`k* v
import org.rut.util.algorithm.support.SelectionSort; &=.7-iC|W
import org.rut.util.algorithm.support.ShellSort; .Na'yS `J
k~$}&O
/** M:K4o%
* @author treeroot SR9M:%dga
* @since 2006-2-2 ` B+Pl6l)F
* @version 1.0 Pj*"2 LBW#
*/ -9"[/
public class SortUtil { (i^<er q
public final static int INSERT = 1; k,[[ CZ0j
public final static int BUBBLE = 2; 8.' THLI
public final static int SELECTION = 3; `SYq/6$VEH
public final static int SHELL = 4; 7)Bizlf
public final static int QUICK = 5; I{u+=0^Y
public final static int IMPROVED_QUICK = 6; #j"N5e}U
public final static int MERGE = 7; ^c>ROpic
public final static int IMPROVED_MERGE = 8; AiV1 vD`
public final static int HEAP = 9; X,+N/nku
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public static void sort(int[] data) { "I[uD)$
sort(data, IMPROVED_QUICK); {=E,.%8
} !f8]gTzN
private static String[] name={ 4({Wipd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ew8Manx
}; LBhDP5qF
HwZ@T &_4
private static Sort[] impl=new Sort[]{ v;R+{K87
new InsertSort(), 0 aiE0b9c
new BubbleSort(), T7XbbU
new SelectionSort(), D4QLlP
new ShellSort(), ZL- ` 3x
new QuickSort(), zLVk7u{e
new ImprovedQuickSort(), :}fIu?hCA
new MergeSort(), DYL\=ya1
new ImprovedMergeSort(), &vS@-K
new HeapSort() ",Fqpu&M
}; 0kld77tn 2
Csx??T_>r
public static String toString(int algorithm){ ~`Rooh3m
return name[algorithm-1]; @LDu08lr
} }F)eA1
~^"s.Lsb
public static void sort(int[] data, int algorithm) { +WFa4NZ
impl[algorithm-1].sort(data); !tv+,l&L
} N< 7
\EeK<)4:
public static interface Sort { >`.$Tyw
public void sort(int[] data); gS^Y?
} \>|:URnD
Ezw<
public static void swap(int[] data, int i, int j) { Zk 9i}H
int temp = data; x?-kt.M
data = data[j]; .&c!k1kH
data[j] = temp; DP7B X^e
} Pt%EyFG
} BYsQu.N