[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; fJ\Ys;l[j
} ^/g&Q
int i1=l; EdcbWf7
int i2=mid+1; aG_@--=
for(int cur=l;cur<=r;cur++){ M$YU_RPl+
if(i1==mid+1) Zaime
data[cur]=temp[i2++]; ,=>Ws:j
else if(i2>r) Z mVw5G q
data[cur]=temp[i1++]; ad)jw:n
else if(temp[i1] data[cur]=temp[i1++]; /]pJ(FFC
else xbqFek$/r
data[cur]=temp[i2++]; J,(@1R]KF:
} fab.%$
} w}|XSJ!
HKp|I%b]J
} UlP2VKM1&
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改进后的归并排序: X<8?>#
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package org.rut.util.algorithm.support; Y8v13"P6
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import org.rut.util.algorithm.SortUtil; $|"Y|3&X
A4uKE"WE
/** j)nL!":O
* @author treeroot 6C'W
* @since 2006-2-2 U_Jchi,!
* @version 1.0 Sy@)Q[A
*/ U1ZKJ<pv
public class ImprovedMergeSort implements SortUtil.Sort { )fy-]Ky *
r{>`"
private static final int THRESHOLD = 10; `uP:UQ9S
=Gv*yR*]t
/* z( \4{Y
* (non-Javadoc) M}fk[Yr>
* $-=xG&fSz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B%7Az!GX
*/ / f5q9sp8
public void sort(int[] data) { Iip%er%b
int[] temp=new int[data.length]; dl]pdg<
mergeSort(data,temp,0,data.length-1); jFDVd;#CS
} D~ogq]
4%B0H>
private void mergeSort(int[] data, int[] temp, int l, int r) { q@Aw]Kh
int i, j, k; o;TS69|D
int mid = (l + r) / 2; VQ"Z3L3-4
if (l == r) !n7'TM'
return; CZ33|w
if ((mid - l) >= THRESHOLD) Kpg?' !I
mergeSort(data, temp, l, mid); K<rv|bJ
else ;A6%YY
insertSort(data, l, mid - l + 1); ,xw1B-dx
if ((r - mid) > THRESHOLD) Tbp;xv_qo
mergeSort(data, temp, mid + 1, r); f@@7?5fW
else l"zA~W/
insertSort(data, mid + 1, r - mid); ;~-ZN?8
TMsc5E
for (i = l; i <= mid; i++) { %lk^(@+ T
temp = data; DFkDlx
} bN\;m^xfu
for (j = 1; j <= r - mid; j++) { hpc&s
temp[r - j + 1] = data[j + mid]; {^D; ($lm
} z+Guu8
int a = temp[l]; v,'k2H
int b = temp[r]; ;kI)j ?
for (i = l, j = r, k = l; k <= r; k++) { Z;O!KsJ
if (a < b) { t[r6jo7
data[k] = temp[i++]; Sa[?B
a = temp; =X1oB,W{
} else { !,+<?o y
data[k] = temp[j--]; XJ!?>)N .
b = temp[j]; )1f%kp#]
} ]]o?!NX
} Kf-XL),3l
} o|$r;<o3R
RNF%i~nhO
/** ZO!h!2*
* @param data (%c&Km7K
* @param l Gf +>AjU'
* @param i 4bCA"QM[[
*/ p/yz`m T'w
private void insertSort(int[] data, int start, int len) { w@"Zjbs`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3$?nzKTW\
} 0bpGPG's&
} #<~oR5ddlb
} *>/w,E]
} `Ez8!d{MD8
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堆排序： <0VC`+p<)
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package org.rut.util.algorithm.support; blLl1Ak
+DG-MM%\
import org.rut.util.algorithm.SortUtil; `_f&T}]
Kton$%Li
/** Egz6rRCvg
* @author treeroot 1Ys)b[:
* @since 2006-2-2 \QQWhwE
* @version 1.0 ?S;z!) H)P
*/ <:!E'WT#f
public class HeapSort implements SortUtil.Sort{ 7'OR;b$
7+88o:G9
/* (non-Javadoc) {Q>4zepN!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >k ==7#P
*/ cTz@ga;!mI
public void sort(int[] data) { yEMM@5W)8
MaxHeap h=new MaxHeap(); ^*YoNd_kpN
h.init(data); P*jiz@6
for(int i=0;i h.remove(); RH{+8?0
System.arraycopy(h.queue,1,data,0,data.length); ;GE6S{~-
} ub!lHl
"n{';Q)
private static class MaxHeap{ ZbiC=uh
q44vI
void init(int[] data){ WJxcJE
this.queue=new int[data.length+1]; u$CN$ynS
for(int i=0;i queue[++size]=data; +PnuWK$
fixUp(size); M,W-,l ]
} xQ';$&
} ]#[4eaCg
|)xWQ KzA
private int size=0; E2 FnC}#W
o~9sO=-O
private int[] queue; 7IFZK\V
wpp!H<')
public int get() { \03<dUA6
return queue[1]; }Ml BmD
} E=8GSl/Jx
w2!:>8o:
public void remove() { e$teh` p3
SortUtil.swap(queue,1,size--); DE7y\oO]
fixDown(1); "N">RjJ"
} U'msHF
file://fixdown T{2)d]Y
private void fixDown(int k) { !Pz#czo
int j; FGPqF;
while ((j = k << 1) <= size) { ps?su`
if (j < size %26amp;%26amp; queue[j] j++; $IS!GS&:
if (queue[k]>queue[j]) file://不用交换 C~ A`h=A<
break; ?hAO-*);
SortUtil.swap(queue,j,k); YcV^Fqi!
k = j; w >%^pO~}`
} BW6Ox=sr<
} ?(U;T!n
private void fixUp(int k) { l]~9BPsR
while (k > 1) { n!AW9]
int j = k >> 1; p^}`^>OL
if (queue[j]>queue[k]) $a8,C\me?
break; 3M(*q4A$"
SortUtil.swap(queue,j,k); YD@Z}NE v"
k = j; {]U \HE1w
} "+4Jmf9
} 00'SceL=`
U}4I29M
} WUjRnzVM
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} tBfmjxv
"g)bNgGV}
SortUtil： ',!jYh}Uxk
OiXO<1'$
package org.rut.util.algorithm; vE8BB$D
%~k>$(u6
import org.rut.util.algorithm.support.BubbleSort; tl{{Vc[
import org.rut.util.algorithm.support.HeapSort; >itNa.K
import org.rut.util.algorithm.support.ImprovedMergeSort; ;~L,Aqn7
import org.rut.util.algorithm.support.ImprovedQuickSort; $j(d`@.DN~
import org.rut.util.algorithm.support.InsertSort; hr&&b3W3p
import org.rut.util.algorithm.support.MergeSort; T)%6"rPL3!
import org.rut.util.algorithm.support.QuickSort; livKiX`
import org.rut.util.algorithm.support.SelectionSort; $T#fCx/
import org.rut.util.algorithm.support.ShellSort; 5-ED\-
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/** _yJz:pa
* @author treeroot ?<BI)[B
* @since 2006-2-2 &o7PB`(l
* @version 1.0 (3$DUvx7
*/ ^fe,A=k~1
public class SortUtil { _68vSYr
public final static int INSERT = 1; XkkzY5rxOc
public final static int BUBBLE = 2; JIw?]xa*
public final static int SELECTION = 3; MRXw)NAw
public final static int SHELL = 4; >q&5Z
public final static int QUICK = 5; T iL.py,
public final static int IMPROVED_QUICK = 6; d (x'\4(K
public final static int MERGE = 7; 3uxf n=E
public final static int IMPROVED_MERGE = 8; %.u*nM7sos
public final static int HEAP = 9; h~]e~u V
u=qaz7E
public static void sort(int[] data) { U?Dr0wD;[
sort(data, IMPROVED_QUICK); /O.Ql,6[
} rQlQ^W$=?
private static String[] name={ +TA~RCd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7P(jMalq
}; rv(N0p/
aem gGw<
private static Sort[] impl=new Sort[]{ />}zB![(K
new InsertSort(), /n(0w`
new BubbleSort(), `p9N| V
new SelectionSort(), DnJ `]r
new ShellSort(), l'_]0%o]
new QuickSort(), IDJ2epW*;
new ImprovedQuickSort(), ^X+qut+~
new MergeSort(), [e ztu9
new ImprovedMergeSort(), !wQ?+:6
new HeapSort() Al6%RFt
}; 3u[8;1}7Q
!QvmzuK
public static String toString(int algorithm){ TfkGkVR
return name[algorithm-1]; 0SWqC@AR%
} G/FDD{y
uq-`1m}
public static void sort(int[] data, int algorithm) { CJCxL\
impl[algorithm-1].sort(data); WkE="E}
} Li|~%E1
g(X`.0
public static interface Sort { <QFayZ$
public void sort(int[] data); +>1?ck
} CmbgEGIh[a
Xe_djy'8
public static void swap(int[] data, int i, int j) { QwpX3 k6
int temp = data; 'h0>]A 2|X
data = data[j]; *yw!Y{e!9
data[j] = temp; U^GVz%\
} z8'zH>
} q78OP}