[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; hgCeU+H
} XU Hu=2F
int i1=l; (DCC4%w"
int i2=mid+1; ?3"bu$@8
for(int cur=l;cur<=r;cur++){ `<h}Ygo>k/
if(i1==mid+1) \5$N> 2kO
data[cur]=temp[i2++]; _W4i?Bde
else if(i2>r) :cmfy6h]
data[cur]=temp[i1++]; 8Vj]whE
else if(temp[i1] data[cur]=temp[i1++]; h*f=
else -bK#&o,
data[cur]=temp[i2++]; xr)Rx{)3h
} t,;1?W#
} vIrLG1EK
2yhtJ9/
} [EDw0e
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改进后的归并排序: Lnnl++8Y
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package org.rut.util.algorithm.support; cjf}yn
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import org.rut.util.algorithm.SortUtil; 'g8~539{&
#~54t0|Cd>
/** }*m:zD@8$
* @author treeroot 9N|O*h1;u
* @since 2006-2-2 cxdhG"
* @version 1.0 n`T 4aDm
*/ 2jf-vWV_
public class ImprovedMergeSort implements SortUtil.Sort { iKa}@U
tnz BNW8
private static final int THRESHOLD = 10; SeBbI&Ju
:2?J#/o
/* inavi5.
* (non-Javadoc) 9)Y]05us
* Rx*T7*xg{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L=Q-r[
*/ z]> 0A
public void sort(int[] data) { '2a}1?
int[] temp=new int[data.length]; o_p//S#q
mergeSort(data,temp,0,data.length-1); qn#\ro1H
} 12aAO|]/~
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private void mergeSort(int[] data, int[] temp, int l, int r) { C_?L$3 U0
int i, j, k; ]`&EB~K&NY
int mid = (l + r) / 2; |C@)#.nm[
if (l == r) ho2o/>Ef3
return; n*%<!\gJ
if ((mid - l) >= THRESHOLD) 34 W#
mergeSort(data, temp, l, mid); 2i#wJ8vrF
else \pB"R$YZ6
insertSort(data, l, mid - l + 1); ?'p`Qv
if ((r - mid) > THRESHOLD) 9kzytx
mergeSort(data, temp, mid + 1, r); )'xTDi
else _d&zHlc_
insertSort(data, mid + 1, r - mid); 1`2n<qo
S5E mLgnRs
for (i = l; i <= mid; i++) { i)P.Omr
temp = data; )+Wx!c,mb
} HFBGM\R02
for (j = 1; j <= r - mid; j++) { A0yRA+
temp[r - j + 1] = data[j + mid]; }%[TJ@R;
} B5u06O
int a = temp[l]; =M)>w4-
int b = temp[r]; l/`<iG%
for (i = l, j = r, k = l; k <= r; k++) { h{S';/=8
if (a < b) { `f}c 1
data[k] = temp[i++]; 9ulJZ\cQ
a = temp; >fI<g8N D
} else { *I`, L/
data[k] = temp[j--]; %up]"L&i
b = temp[j]; cu]2`DF
} mQBq-;
} 3Ec5:Caz
} XRKL;|cd
)MLOYX
/** -*k%'Gr
* @param data #Oz<<G<
* @param l g/W<;o<v(I
* @param i cUaLv1:HI
*/ R~CQ=KQ.
private void insertSort(int[] data, int start, int len) { TS)p2#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]x?9lQ1&
} D|,d_W
} V{@<Z8sW#
} j/{F#auI
} {LbNKjn
fzRzkn:=
堆排序： tQbDP!,A*=
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package org.rut.util.algorithm.support; .GM&]Hb
x:O?Fj
import org.rut.util.algorithm.SortUtil; .t4IR =Z
z)=D&\HX
/** QS,IM>Nr
* @author treeroot R:x4j#(
* @since 2006-2-2 |[}YM%e
* @version 1.0 xIf,1g@Cq9
*/ W *0XV
public class HeapSort implements SortUtil.Sort{ `UMv#-Y8
g4&zBn
/* (non-Javadoc) X3#|9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1j# ~:=I
*/ ~d^+yR-
public void sort(int[] data) { Zaf].R
MaxHeap h=new MaxHeap(); >5#`j+8=q
h.init(data); Il%LI
for(int i=0;i h.remove(); NwoBM6 #
System.arraycopy(h.queue,1,data,0,data.length); ++F #Z(p
} EE#4,d`J
gfw,S;
private static class MaxHeap{ dY68wW>d|
"3LOL/7f
void init(int[] data){ Xz4!#,z/
this.queue=new int[data.length+1]; W*e6F?G
for(int i=0;i queue[++size]=data; ooreforr
fixUp(size); U")~bU
} N?U;G*G
} 4~hd{8
~;QO`I=0P
private int size=0; PQ<""_S||
1mgLH
private int[] queue; v$s3f|Y
F:x" RbbF
public int get() { rXuhd [!(P
return queue[1]; vr/V_
} :"g^y6i
XU5/7 .
public void remove() { mS6 #\'Qa
SortUtil.swap(queue,1,size--); ~tn*y4uK
fixDown(1); f}0(qN/G
} d3_aFsQ
file://fixdown 9e^[5D=L
private void fixDown(int k) { [!,&A{.!
int j; c<wsWs 4V
while ((j = k << 1) <= size) { r#JE7uneT
if (j < size %26amp;%26amp; queue[j] j++; AcyiP
if (queue[k]>queue[j]) file://不用交换 6A;V[3
break; HsGXb\
SortUtil.swap(queue,j,k); #Z)e]4{!l
k = j; m{x[q
} RZ:Yu
} Bab`wfUve
private void fixUp(int k) { Mg W0 ).
while (k > 1) { (BEGt'7
int j = k >> 1; O&V}T#8n
if (queue[j]>queue[k]) G`9Ud
break; *?Nrx=O*
SortUtil.swap(queue,j,k); MzL^u8
k = j; |)* K#%j
} f)l:^/WP+
} 8s-y+M@.
msM
} "6 |j 0?Q
S3EY9:^C
} _?M34&.X
tisSj?+
SortUtil： No>XRG+
M' e<\wqm
package org.rut.util.algorithm; m.pB]yq&
jB!p,fqcb
import org.rut.util.algorithm.support.BubbleSort; I;<0v@
import org.rut.util.algorithm.support.HeapSort; 6O bB/*h
import org.rut.util.algorithm.support.ImprovedMergeSort; ? [l[y$9
import org.rut.util.algorithm.support.ImprovedQuickSort; 6X~.J4
import org.rut.util.algorithm.support.InsertSort; O`Er*-O
import org.rut.util.algorithm.support.MergeSort; :f G5?])
import org.rut.util.algorithm.support.QuickSort; LQ`s>q
import org.rut.util.algorithm.support.SelectionSort; #(F/P!qk
import org.rut.util.algorithm.support.ShellSort; JS<S?j?*/
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/** dIg/g~ t"
* @author treeroot m_zl*s*6
* @since 2006-2-2 .T 6NMIp*
* @version 1.0 =e](eA;
*/ y<0zAsT
public class SortUtil { QMLz
public final static int INSERT = 1; 1"YN{Ut;G
public final static int BUBBLE = 2; 1fm4:xHH
public final static int SELECTION = 3; r/}q=J.
public final static int SHELL = 4; >h1 3i@`r
public final static int QUICK = 5; 1K?RA*aj
public final static int IMPROVED_QUICK = 6; C]414Ibi
public final static int MERGE = 7; %V71W3>6WS
public final static int IMPROVED_MERGE = 8; !TvNT}4Z
public final static int HEAP = 9; H )hO/1m
WHeyE3}p
public static void sort(int[] data) { !iA3\Ai"
sort(data, IMPROVED_QUICK); CuC1s>
} a?S5 =
private static String[] name={ E-IVv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :+NZW9_
}; S"'0lS
kH~ z07:
private static Sort[] impl=new Sort[]{ w=:o//~6j
new InsertSort(), O 7RIcU
new BubbleSort(), ,%"!8T
new SelectionSort(), h?R{5?RxK
new ShellSort(), J!Er%QUR
new QuickSort(), :dq.@:+<R
new ImprovedQuickSort(), 94VtGg=b}
new MergeSort(), J{;XNf =
new ImprovedMergeSort(), KBE3q)
new HeapSort() g%Bh-O9\
}; ve($l"T
${m;x:'
public static String toString(int algorithm){ V5:ad
return name[algorithm-1]; (StX1g'
} 60,z!Vv
EQI9J#;+
public static void sort(int[] data, int algorithm) { 01=nS?
impl[algorithm-1].sort(data); M.fAFL
} 'yxN1JF
O+x"c3@Z)D
public static interface Sort { $`j%z@[g
public void sort(int[] data); EyR~VKbJ'
} W[c[ulY&
c?5?TJpm
public static void swap(int[] data, int i, int j) { @<kY,ox@~
int temp = data; ?M!Mb-C[
data = data[j]; 94^)Ar~O
data[j] = temp; T5nBvSVv'
} Y`F)UwKK
} 2[|52+zhc