[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; r+n&Pp+9
} q~Ud>{
int i1=l; #gq3 e
int i2=mid+1; NGxuwHIQ8
for(int cur=l;cur<=r;cur++){ 8LOzL,Ah
if(i1==mid+1) DN+iS
data[cur]=temp[i2++]; /W;;7k
else if(i2>r) tSjK=1"}
data[cur]=temp[i1++]; ,b/0_Q
else if(temp[i1] data[cur]=temp[i1++]; >2ct1_
else iJcl0)|
data[cur]=temp[i2++]; Y\lBPp0{\v
} ,QDq+93
} }-!$KR]:s
NEvt71k
} 8164SWB
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改进后的归并排序: *GA#.$n
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package org.rut.util.algorithm.support; ;YB8X&H$
0xsvxH"*
import org.rut.util.algorithm.SortUtil; 3x#G SS
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/** mJ-@:5
* @author treeroot CZ@M~Si_
* @since 2006-2-2 oR~+s&c
* @version 1.0 jRGG5w}
*/ 0\/7[nwS
public class ImprovedMergeSort implements SortUtil.Sort { /H)l\m +
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private static final int THRESHOLD = 10; cWm.']
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/* R1U\/
* (non-Javadoc) f,$FrI,
* H_x35|"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bF3j*bpO"
*/ uzsR*x%s-
public void sort(int[] data) { 79&Mc,69
int[] temp=new int[data.length]; YO=;)RA
mergeSort(data,temp,0,data.length-1); SU*P@?:/}
} nC z[#t
wH<S0vl
private void mergeSort(int[] data, int[] temp, int l, int r) { n_5g:`Y
int i, j, k; tZ(Wh
int mid = (l + r) / 2; /(Y\ <
if (l == r) Bk8U\Ut
return; f+d{^-
if ((mid - l) >= THRESHOLD) >$}nKPC,Y
mergeSort(data, temp, l, mid); Z:'2puU+?
else ]UMwpL&rY
insertSort(data, l, mid - l + 1); ;$Wa=wHb
if ((r - mid) > THRESHOLD) y};qo'dlt
mergeSort(data, temp, mid + 1, r); 9,,1\0-T*
else OuX/BMG
insertSort(data, mid + 1, r - mid); j,Mp["X&
7IHWj<
for (i = l; i <= mid; i++) { _ TUw0:&
temp = data; vWow^g
} MjHeUf
for (j = 1; j <= r - mid; j++) { m0:8thZN
temp[r - j + 1] = data[j + mid]; z\fk?Tj<ro
} 7FWf,IjcGY
int a = temp[l]; }(gXlF
int b = temp[r]; ]RxNSr0e
for (i = l, j = r, k = l; k <= r; k++) { #Qkl| h
if (a < b) { CnAhEf)b
data[k] = temp[i++]; rGoB&% pc
a = temp; L/V3sSt
} else { b\}`L"
data[k] = temp[j--]; "|f;
b = temp[j]; m|p}Jf!
} A=BpB}b
} T%Z`:mf
} jAF DkqH
3n X7$$X
/** =\`9\Gd
* @param data j+s8V-7(
* @param l u6I# D _
* @param i C}45ZI4
*/ Rd2*
private void insertSort(int[] data, int start, int len) { 1V)0+_Yv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y8Mo.v
} <&:3|2p
} \@5W&Be^
} $U!w#|&
} x`a@h\n
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堆排序： e;Q~P]x
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package org.rut.util.algorithm.support; 5FzG_ w
d@`yRueWiV
import org.rut.util.algorithm.SortUtil; #~(@Ka.eA0
IDv@r\Xw
/** ci,o'`Q
* @author treeroot W.>yIA%
* @since 2006-2-2 WC}mt%H*O
* @version 1.0 .nT"f>S&'
*/ c,x2
public class HeapSort implements SortUtil.Sort{ ;u,5 2
tw^V?4[Miu
/* (non-Javadoc) r/8,4:rh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t'~:me!
*/ Z3 &8(vw
public void sort(int[] data) { YAsvw\iseK
MaxHeap h=new MaxHeap(); )\p@E3Uxf
h.init(data); J0^p\mG
for(int i=0;i h.remove(); AlGD .K
System.arraycopy(h.queue,1,data,0,data.length); ,v(G2`Z
} owQLAV
#~nI^ ggW
private static class MaxHeap{ vrh}X[JEw'
<PXA`]x~
void init(int[] data){ g`\Vy4w
this.queue=new int[data.length+1]; |qfnbi-\
for(int i=0;i queue[++size]=data; D`iWf3a.
fixUp(size); L[<MBgFKv
} T7&itgEYG/
} <4^a(Zh
@ -g^R4e<
private int size=0; )6Z)z;n]aW
3 nb3rHQ
private int[] queue; !i{@B
nbhx2@Teqe
public int get() { n0nkv[
return queue[1]; 9v0f4Pbxm
} UI |D?z<
/TS>I8V!
public void remove() { bMf+/n
SortUtil.swap(queue,1,size--); R~)c(jj5
fixDown(1); lYU_uFOs\
} RQv`D&u_
file://fixdown ykM(` 1`m
private void fixDown(int k) { W>'R<IY4#N
int j; s|YY i~
while ((j = k << 1) <= size) { -x5^>+Y4
if (j < size %26amp;%26amp; queue[j] j++; o"K{^ L~u
if (queue[k]>queue[j]) file://不用交换 @~/LsYA:
break; 1,BtOzuRo
SortUtil.swap(queue,j,k); QR<IHE{~8
k = j; yP~D."
} #2|sS|0<
} G`gYwgU;
private void fixUp(int k) { "0nto+v
while (k > 1) { a!4'}gHR
int j = k >> 1; SC"=M^E
if (queue[j]>queue[k]) i5V ly'Q
break; Pqx=j_st
SortUtil.swap(queue,j,k); 8%I4jL<
k = j; Wv$e/N`l
} Aln\:1MU
} ExV>s*y
z_CBOJl#C!
} .#EmE'IP*
:8MpSvCV
} AgO:"'c
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SortUtil： M {_`X
KYd2=P6
package org.rut.util.algorithm; MZ6?s(mkx
'9H]SEw
import org.rut.util.algorithm.support.BubbleSort; MX6;ww
import org.rut.util.algorithm.support.HeapSort; Q{V|{yV^y
import org.rut.util.algorithm.support.ImprovedMergeSort; T<?JL.8g_
import org.rut.util.algorithm.support.ImprovedQuickSort; (N0G[(>
import org.rut.util.algorithm.support.InsertSort; N^CD4l
import org.rut.util.algorithm.support.MergeSort; /3'>MRzR
import org.rut.util.algorithm.support.QuickSort; WZ;f3 "
import org.rut.util.algorithm.support.SelectionSort; .u)Po;e`
import org.rut.util.algorithm.support.ShellSort; pgfI1`h
Q_qc_IcM y
/** mp%i(Y"vp
* @author treeroot jats)!:
* @since 2006-2-2 9Jaek_A`
* @version 1.0 X{<j%PdC
*/ OV Iu&6#
public class SortUtil { a*KB'u6&
public final static int INSERT = 1; cPkN)+K
public final static int BUBBLE = 2; dy#dug6j
public final static int SELECTION = 3; Z#nj[r!l}
public final static int SHELL = 4; bsR&%C
public final static int QUICK = 5; kT!FC0E{
public final static int IMPROVED_QUICK = 6; a/{T;=_GY
public final static int MERGE = 7; jo0p/5;
public final static int IMPROVED_MERGE = 8; "PLZZL$+
public final static int HEAP = 9; kce+aiv|u
Dm"GCV
public static void sort(int[] data) { 7YkxIzE
sort(data, IMPROVED_QUICK); ]7fqVOiOu
} J'.U+XU
private static String[] name={ S_ e }>-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V<?t(_Y
}; sq\oatMw[
j^ex5A.& &
private static Sort[] impl=new Sort[]{ x$?{)EY
new InsertSort(), J$v0
new BubbleSort(), wYOSaGyZ0I
new SelectionSort(), [D^KM|I%+
new ShellSort(), (KK9/k
new QuickSort(), 7P.C~,+D%P
new ImprovedQuickSort(), jx+%X\zokA
new MergeSort(), $:t;WXc.<
new ImprovedMergeSort(), r,EIOcz:
new HeapSort() X-e)w
}; W{?7Pn?1`
*R0Ae 4
public static String toString(int algorithm){ OtrO"K
return name[algorithm-1]; {xMY2I++
} 1wi{lJaz
W,}HQ
public static void sort(int[] data, int algorithm) { =;i@,{ ~
impl[algorithm-1].sort(data); CT6a
} P}KyT?X:
5kofO
public static interface Sort { oost}%WxN
public void sort(int[] data); Sz.jv#Y
} =pF 6
#,0%g1
public static void swap(int[] data, int i, int j) { .UU BAyjm
int temp = data; oZA?}#DRl
data = data[j]; K\`L>B. 1
data[j] = temp; mflH&Bx9
} !/BXMj,=
} ^$4d'