[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; bqED5;d'#
} nx'c=gp
int i1=l; O=3/qs6m
int i2=mid+1; ~bZ=]i
for(int cur=l;cur<=r;cur++){ 0cycnOd
if(i1==mid+1) m}'_Poc
data[cur]=temp[i2++]; g$s;;V/8e
else if(i2>r) ZHK>0>;
data[cur]=temp[i1++]; ;Xt<\^e
else if(temp[i1] data[cur]=temp[i1++]; %[$HX'Y
else 7,SQz6]
data[cur]=temp[i2++]; Kd-1EU
} )bFl-
} yus3GqPI
r""rJzFz'
} X6cn8ak3
[@Ac#
改进后的归并排序: w6s[|i)&
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package org.rut.util.algorithm.support; J.yM@wPS>
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import org.rut.util.algorithm.SortUtil; T2Yf7Szp
4Et(3[P71
/** [1vm~w'
* @author treeroot g.&B8e
* @since 2006-2-2 Q!P%duO
* @version 1.0 6axxyh%
*/ {J==y;dK
public class ImprovedMergeSort implements SortUtil.Sort { Bg]VaTm[=
Ow4_0l&
private static final int THRESHOLD = 10; -LiGO#U
4<-Kd~uL
/* eS!]..%y
* (non-Javadoc) 6o^>q&e}%
* -{0Pq.v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M)ET1ZM
*/ ,4H? +|!
public void sort(int[] data) { WhW}ZS'r
int[] temp=new int[data.length]; bJ_rU35s>
mergeSort(data,temp,0,data.length-1); hH`x*:Qja
} iI<c
2G~{x7/[@
private void mergeSort(int[] data, int[] temp, int l, int r) { |3FI\F;^q
int i, j, k; 9F807G\4Qt
int mid = (l + r) / 2; 4fKvB@O@.
if (l == r) 9;L4\
return; 3wv@wqx
if ((mid - l) >= THRESHOLD) rL-R-;Ca
mergeSort(data, temp, l, mid); @SD XJJh
else Leb Kzqe
insertSort(data, l, mid - l + 1); 1)= H2n4)
if ((r - mid) > THRESHOLD) y8$3kXh
mergeSort(data, temp, mid + 1, r); |1%%c %
else t+KW=eW
insertSort(data, mid + 1, r - mid); %!\=$s}g
5b:1+5iF-
for (i = l; i <= mid; i++) { ?V2P]|
temp = data; Ln#o:"E
} 6!]@S|vDX
for (j = 1; j <= r - mid; j++) { @_C]5D^J^~
temp[r - j + 1] = data[j + mid]; <~dfp
} 4+hNP'e
int a = temp[l]; FXr^ 4B}
int b = temp[r]; 9Vm aB
for (i = l, j = r, k = l; k <= r; k++) { L~5f*LE$1
if (a < b) { 3g;Y
data[k] = temp[i++]; d7kE}{,
a = temp; / <(|4e
} else { ~3bV~H#~m
data[k] = temp[j--]; {Z/iYHv~#c
b = temp[j]; J6CSu7Voa
} _5Lcr)
} |6Y:W$7k
} 8~(,qU8-N
\r IOnZ.WK
/** Hpix:To
* @param data ,&,%B|gT]
* @param l 1R}9k)JQ
* @param i n=-vOa%
*/ (LK@w9)i;
private void insertSort(int[] data, int start, int len) { !U?C_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #+o$Tg
} h>bjG
} 2;sTSGDG
} d[?RL&hJO
} 4vL\t uoz
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堆排序： qVh?%c1.Y
MX]#|hEeQ
package org.rut.util.algorithm.support; Lz1KDXr`)+
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import org.rut.util.algorithm.SortUtil; 3YLK?X8
P1OYS\
/** drAJ-ii
* @author treeroot !!L'{beF
* @since 2006-2-2 h.?<(I
* @version 1.0 jlb8<xIC]
*/ _i ztQ78
public class HeapSort implements SortUtil.Sort{ L&+k`b
0i}.l\
/* (non-Javadoc) bDDP:INm.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y"t|0dO%b
*/ dXDyY
public void sort(int[] data) { q2xAx1R`sV
MaxHeap h=new MaxHeap(); iY`[dsT
h.init(data); #q:j~4)h
for(int i=0;i h.remove(); eY`z\I
System.arraycopy(h.queue,1,data,0,data.length); EJ {vJZO
} 9%kO%j,3
<&[` +
private static class MaxHeap{ #*:1Ch]B
<q'?[aKvR
void init(int[] data){ zr ez*
this.queue=new int[data.length+1]; Srw`vql{(
for(int i=0;i queue[++size]=data; "d-vs t5
fixUp(size); 5dv|NLl
} 1;m?:|6K{
} AM?ZhM
\GHj_r
private int size=0; k@fxs]Y_L
)r"R
private int[] queue; Z<|x6%
B[mZQ&Gz`a
public int get() { vV"YgN:
return queue[1]; v3[ZPc;;
} Ew]&~:$Ki
LntRLB'
public void remove() { '\QJ{/JV
SortUtil.swap(queue,1,size--); :JBtqpo2
fixDown(1); j7);N
} [|$C2Dhw=
file://fixdown DPY+{5q2
private void fixDown(int k) { r!w4Br0
int j; PM@_ZJ'x
while ((j = k << 1) <= size) { lrPIXIM
if (j < size %26amp;%26amp; queue[j] j++; NfQQJ@*
if (queue[k]>queue[j]) file://不用交换 6-$95.Y2
break; s-6$C
SortUtil.swap(queue,j,k); X%I@4 B7Ts
k = j; -c8h!.Q$
} uWMSn
} .HTRvE`X
private void fixUp(int k) { k_1;YOBF
while (k > 1) { BV<_1WT}
int j = k >> 1; Foj|1zJS_
if (queue[j]>queue[k]) maSVqG
break; UH&1QV
SortUtil.swap(queue,j,k); kb$Yc)+R4
k = j; xGOmvn^lQ
} v#9i|
} w[vccARQ
.,VLQbtg
} I7h v'3u
pQZ`dS\
} !`H!!Kg0L
c;KMox/
SortUtil： `}ZtK574
18~jUYMV
package org.rut.util.algorithm; 9h+TO_T@F
>BJBM |
import org.rut.util.algorithm.support.BubbleSort; wg k[_i
import org.rut.util.algorithm.support.HeapSort; 3 q8S
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Et^,I:`
import org.rut.util.algorithm.support.ImprovedQuickSort; L09r|g4Z
import org.rut.util.algorithm.support.InsertSort; z2R?GQ5 A
import org.rut.util.algorithm.support.MergeSort; +i /4G.=*
import org.rut.util.algorithm.support.QuickSort; Bvj
import org.rut.util.algorithm.support.SelectionSort; U$@}!X
import org.rut.util.algorithm.support.ShellSort; 4QC_zyTE
1"t9x.
/** 8YPX8d8u
* @author treeroot mxH63$R
* @since 2006-2-2 LGtw4'yr
* @version 1.0 ]w*`}
*/ a_VWgPVdDS
public class SortUtil { butBS
public final static int INSERT = 1; -oZw+ge}
public final static int BUBBLE = 2; T#e|{ZCbq
public final static int SELECTION = 3; 4K~>
public final static int SHELL = 4; am'K$s
public final static int QUICK = 5; W3('1
public final static int IMPROVED_QUICK = 6; ]T40VGJ:h
public final static int MERGE = 7; u!HbS*jqq
public final static int IMPROVED_MERGE = 8; Ke[`zui@?
public final static int HEAP = 9; h0x'QiCc
r_8;aPL
public static void sort(int[] data) { FBrh!vQ<
sort(data, IMPROVED_QUICK); 3k8nWT:wT
} <h|&7
private static String[] name={ %"#ydOy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {a2Gb
}; 3*?W2;Zw$
~USyN'5lU7
private static Sort[] impl=new Sort[]{ 0e:j=kd)NH
new InsertSort(), 6h) &h1Yd
new BubbleSort(), c<Ud[x.
new SelectionSort(), 1JOoICjB
new ShellSort(), >`yRL[c;
new QuickSort(), [k%u$
new ImprovedQuickSort(), k8+U0J_{'
new MergeSort(), SEWdhthP
new ImprovedMergeSort(), k:mW ,s|a
new HeapSort() :"nh76xg<
}; zII^Ny8D
rNm_w>bq
public static String toString(int algorithm){ p? w^|V
return name[algorithm-1]; ))X"bFP!3
} Q4L7{^[X
".pQM.T
public static void sort(int[] data, int algorithm) { 1(i%nX<U
impl[algorithm-1].sort(data); _K!)0p
} 1'\s7P
-) +B!"1
public static interface Sort { }t|i1{%_
public void sort(int[] data); BNO+-ob-
} X-CoC
|NTqJ j
public static void swap(int[] data, int i, int j) { 8"[{[<-
int temp = data; y\9#"=+
data = data[j]; E KJ2P$
data[j] = temp; hoiC J}us
} Hkf]=kPy*
} zlkW-rRkR