[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; hpes
} Y$5v3E\uc
int i1=l; Kyiez]T6%q
int i2=mid+1; w}<I\*\`!
for(int cur=l;cur<=r;cur++){ x(6.W"-S
if(i1==mid+1) A/6nVn
data[cur]=temp[i2++]; zQ^[=siZ}
else if(i2>r) 6C}Z1lZl
data[cur]=temp[i1++]; d#,V^
else if(temp[i1] data[cur]=temp[i1++]; nE.s
else bGnJ4R3J
data[cur]=temp[i2++]; ebwoMG,B-
} hUvH t+d
} %pKs- n`
h0QQP
} AQGE(%X
& b2(Y4
改进后的归并排序: 5fv6RQD
%Ne>'252y
package org.rut.util.algorithm.support; XE%6c3s
<[??\YOc
import org.rut.util.algorithm.SortUtil; j?ubh{Izm
5]ob;tAm
/** e%7P$.
* @author treeroot aV#;o9H{
* @since 2006-2-2 9cPucKuj
* @version 1.0 "Z?":|%7
*/ pl/$@K?L
public class ImprovedMergeSort implements SortUtil.Sort { g+F_M
a m%{M7":7
private static final int THRESHOLD = 10; &,|uTIs
=v"{EmT[$
/* vv_?ip:t
* (non-Javadoc) *M5C*}dl
* uT2cHzqKB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;8kfgpM_
*/ FJ. :*K[
public void sort(int[] data) { }/FM#Xh
int[] temp=new int[data.length]; r{;4(3E2
mergeSort(data,temp,0,data.length-1); 1#RA+d(
} YH$`r6\S
o?8j*]
private void mergeSort(int[] data, int[] temp, int l, int r) { .v8=zi:7Y
int i, j, k; *Y?]="8c#;
int mid = (l + r) / 2; f 8U;T$)
if (l == r) j0M;2 3@[
return; YR#1[fe*_
if ((mid - l) >= THRESHOLD) 0M.[) @
mergeSort(data, temp, l, mid); 6-}9m7#Y
else -^N '18:
insertSort(data, l, mid - l + 1); %"B$I>h
if ((r - mid) > THRESHOLD) ^el:)$
mergeSort(data, temp, mid + 1, r); Pk2"\y@q/
else ^jC0S[csw2
insertSort(data, mid + 1, r - mid); ovVU%2o1b
}RK9Onh3G
for (i = l; i <= mid; i++) { RH'R6
temp = data; J#nEGl|a
} $o^}<)DW
for (j = 1; j <= r - mid; j++) { >0$5H]1u
temp[r - j + 1] = data[j + mid]; >H! 2Wflm
} bsVOO9.4-
int a = temp[l]; L2tmo-]nw
int b = temp[r]; %QkvBg*
for (i = l, j = r, k = l; k <= r; k++) { ?os0JQVB
if (a < b) { =^}2 /vA
data[k] = temp[i++]; u^9,u/gj
a = temp; 81g0oVv
} else { vsR&1hs
data[k] = temp[j--]; ~=Sr0+vV
b = temp[j]; ;T(^riAEl
} b`=rd 4cpU
} 9bvd1bKEW
} Kep?=9r4+
?whp_
/** O^hV<+CX
* @param data ]e9kf$'
* @param l fA5# 2P{
* @param i %vzpp\t
*/ jws(`mIf\
private void insertSort(int[] data, int start, int len) { 1uE[ %M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }zi6F.
} {^iV<>J
} )/w2]d/9
} dY^~^<{Lj
} MDt4KD+bZ
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堆排序： 2Ev,dWV
g'@+#NMw
package org.rut.util.algorithm.support; Pd?YS!+S
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import org.rut.util.algorithm.SortUtil; Orgje@c{
,.B8hr@H6-
/** &aU+6'+QXB
* @author treeroot 8iB}a\]B
* @since 2006-2-2 uNDkK o<M
* @version 1.0 Z )I4U
*/ 1OKJE(T
public class HeapSort implements SortUtil.Sort{ ~<3yTl>
|,crQ'N'
/* (non-Javadoc) }W J`q`g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Urr1K)
*/ eX/$[SL[
public void sort(int[] data) { UgJHSl
MaxHeap h=new MaxHeap(); ~Hf,MLMdTf
h.init(data); |ipppE=
for(int i=0;i h.remove(); _4w%U[GT,
System.arraycopy(h.queue,1,data,0,data.length); 'tj4;+xf^
} }I0^nv1
6W o7q\"
private static class MaxHeap{ ubw ]}sfM#
MmB-SR[>P
void init(int[] data){ I&9B^fF6
this.queue=new int[data.length+1]; l;fH5z
for(int i=0;i queue[++size]=data; ){Y2TWW&0
fixUp(size); PC5FfX
} 6>Fw,$
} 6 9Cxh
-K{ID$!p
private int size=0; !~#31kL&
R_&>iu'[
private int[] queue; 1vr/|RWW
+oa]v1/W
public int get() { &DV'%h>i=
return queue[1]; Ra5cfkH;
} WF]:?WE%
\`^jl
public void remove() { ),_bDI L+
SortUtil.swap(queue,1,size--); T/ov0l_
fixDown(1); spf}{o
} ,o`qB81
file://fixdown <5 +?&i
private void fixDown(int k) { {>qCZ#E5WO
int j; POf \l
while ((j = k << 1) <= size) { YZ}gZQ.A0
if (j < size %26amp;%26amp; queue[j] j++; oT'XcMn
if (queue[k]>queue[j]) file://不用交换 Jq->DzSmj/
break; w K+2;*bI
SortUtil.swap(queue,j,k); uE2Yn`Ha
k = j; ME(!xI//JZ
} 'nul{RE*
} f55Ev<oOa
private void fixUp(int k) { Jg:'gF]jt
while (k > 1) { q&.!*rPD
int j = k >> 1; 6m]L{ buP
if (queue[j]>queue[k]) J';tpr
break; >Y:ouN~<
SortUtil.swap(queue,j,k); 8CL05:&
k = j; Ce:kMkJ
} 7D,+1>5^Ne
} w?[)nlNW
1VeCAx[e
} otOl7XF
Ldu!uihx
} er_aol e
W{`;][
SortUtil： dM;v39
"|/Q5*L
package org.rut.util.algorithm; ~6#O5plKc
1-sG`%
import org.rut.util.algorithm.support.BubbleSort; ,HK-mAH
import org.rut.util.algorithm.support.HeapSort; ]}9[ys
import org.rut.util.algorithm.support.ImprovedMergeSort; ^K:-r !v^
import org.rut.util.algorithm.support.ImprovedQuickSort; ,-SWrp`f
import org.rut.util.algorithm.support.InsertSort; \$xj>b;
import org.rut.util.algorithm.support.MergeSort; AK&=/[U>
import org.rut.util.algorithm.support.QuickSort; 6P02=
import org.rut.util.algorithm.support.SelectionSort; PeJIa %iE
import org.rut.util.algorithm.support.ShellSort; Bk/&H-NI
&& b;Wr
/** :c9 H2
* @author treeroot X?'pcYSL
* @since 2006-2-2 ]3L/8]:
* @version 1.0 MAL;XcRR
*/ `ix&j8E22w
public class SortUtil { n]jw!;
public final static int INSERT = 1; "Ve9\$_s
public final static int BUBBLE = 2; $-paYQ4
public final static int SELECTION = 3; a[E}o<{
public final static int SHELL = 4; 9<5S!?JL
public final static int QUICK = 5; pL2{zW`FDh
public final static int IMPROVED_QUICK = 6; c'wU$xt.w
public final static int MERGE = 7; "-Wb[*U;
public final static int IMPROVED_MERGE = 8; f7&9IW`7F^
public final static int HEAP = 9; =OFx4#6a
<sls1,
public static void sort(int[] data) { 0CK3jdZ+X
sort(data, IMPROVED_QUICK); k\-h-0[|
} HmbQL2
private static String[] name={ $#E!/vVwD7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N{uVh;_
}; plM:7#eA
,OFNV|S$
private static Sort[] impl=new Sort[]{ zxeT{AFPr?
new InsertSort(), m"wP]OQH*+
new BubbleSort(), ^p3W}D
new SelectionSort(), ]#vi/6\J
new ShellSort(), sEi9<$~R@0
new QuickSort(), ZKai*q4?
new ImprovedQuickSort(), sGc.;":
new MergeSort(), I5ZM U
new ImprovedMergeSort(), U+&Eps&NI
new HeapSort() 0!M'z
}; rl]K:8*
$CZ'[`+
public static String toString(int algorithm){ ]88qjKL
return name[algorithm-1]; -B?cF9
} e9>~mtx
z, n[}Q#u
public static void sort(int[] data, int algorithm) { w1eFm:'
impl[algorithm-1].sort(data); I{=Yuc
} s;-AZr)
JX{_,2*$
public static interface Sort { `\f 3Ij,
public void sort(int[] data); [v`kqL~
} ~0@fK<C)O
o7@C$R_#
public static void swap(int[] data, int i, int j) { Udq!YXE0
int temp = data; [2E(3`-u
data = data[j]; c=X+uO-
data[j] = temp; F~eY'~&H}
} (e0(GOqf4
} 2f620