[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; 2B6^]pSk
} mBw2
int i1=l; \1=T sU&^
int i2=mid+1; rER~P\-
for(int cur=l;cur<=r;cur++){ f2uZK!:m
if(i1==mid+1) UqD5 A~w
data[cur]=temp[i2++]; fdd~e52f
else if(i2>r) NY~ dM\
data[cur]=temp[i1++]; w0#%AK
else if(temp[i1] data[cur]=temp[i1++]; LTg?5GwD\j
else \ua9thOG
data[cur]=temp[i2++]; kFS0i%Sr
} Rb{+Ki
} 5/Ydv RB67
aF D="Zh
} 48lzOG
s ;48v
改进后的归并排序: eA`]KalH
u=(H#o<#
package org.rut.util.algorithm.support; 613/K`o
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import org.rut.util.algorithm.SortUtil; TAXd,z N
F?!FD>L{`
/** `ffj8U
* @author treeroot Z$Z`@&U=
* @since 2006-2-2 2}D,df'W4
* @version 1.0 j1'\R+4U
*/ CoKiQUW
public class ImprovedMergeSort implements SortUtil.Sort { gBMta+<fE~
7^c2e*S
private static final int THRESHOLD = 10; kJ/+IGV^v
A$/KP\0Y2
/* 1UC2zM"
* (non-Javadoc) 6(:)otz
* *hV4[=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 72`/d`
*/ ymHKcQ
public void sort(int[] data) { J=b*
int[] temp=new int[data.length]; rU],J!LF
mergeSort(data,temp,0,data.length-1); ZQ@3P7T
} )m|C8[u
ZmNZS0j
private void mergeSort(int[] data, int[] temp, int l, int r) { 4"LPJX)Q
int i, j, k; pMOD\J:l,
int mid = (l + r) / 2; N[>:@h
if (l == r) "_t4F4z
return; 'T%IvJ#Xu
if ((mid - l) >= THRESHOLD) QT_Srw@
mergeSort(data, temp, l, mid); TV<Aj"xw
else TV? ^c?{5
insertSort(data, l, mid - l + 1); SzRL}}I
if ((r - mid) > THRESHOLD) "pYe-_"@
mergeSort(data, temp, mid + 1, r); AmZuo_
else eDuX"/kHA
insertSort(data, mid + 1, r - mid); Bhj:9%`
&.hoCPo$
for (i = l; i <= mid; i++) { JL@F~U9
temp = data; Lg8]dBXu
} D4d]3|/T
for (j = 1; j <= r - mid; j++) { *`%4loW
temp[r - j + 1] = data[j + mid]; ~M*7N@D
} sb'lZFSP~s
int a = temp[l]; sbzeY1
int b = temp[r]; Yi[4DfA
for (i = l, j = r, k = l; k <= r; k++) { .a {QA
if (a < b) { H%FM
data[k] = temp[i++]; ^Wf S\M`
a = temp; g/x_m.
} else { 2mQOj$Lv
data[k] = temp[j--]; FZeP<Ban
b = temp[j]; U8E0~[y'
} *jGPGnSo
} (yfXMp,x
} ]XY0c6 <
4AJ9`1d4
/** P>|Ef~j
* @param data g083J}08
* @param l ^mAJ[^%
* @param i Q Qi@>v|d
*/ Vw7WK
private void insertSort(int[] data, int start, int len) { O /vWd"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %,XI]+d
} T=.-Cl1A
} QJQJR/g
} D_Guc8*
} >cTjA):
@$Yb#$/
堆排序： Mg+4huT
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package org.rut.util.algorithm.support; !1("(Eb
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import org.rut.util.algorithm.SortUtil; pVY4q0@
D]jkR} t
/** gbJG`zC>U
* @author treeroot !h?=Wv ==]
* @since 2006-2-2 YKNb59k
* @version 1.0 H)\4=^
*/ whw{dfE
public class HeapSort implements SortUtil.Sort{ PaNeu1cO
\PzN XQ$
/* (non-Javadoc) NfOp=X?Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RFB(d=o5S
*/ Ll?g.z"
public void sort(int[] data) { vABXXB
MaxHeap h=new MaxHeap(); =Aj"j-r&{
h.init(data); %oR>Uo
for(int i=0;i h.remove(); M= atls
System.arraycopy(h.queue,1,data,0,data.length); u"\=^F
} Xty#vI
UPR/XQ
private static class MaxHeap{ G#|Hu;C6"
^zHRSO
void init(int[] data){ A=0@UqM
this.queue=new int[data.length+1]; }{A?PHV5
for(int i=0;i queue[++size]=data; ,!hnm
fixUp(size); V+.Q0$~F5
} \<=IMa0
} &lUNy L
RNvQ
private int size=0; g[AA,@p+
j!7Qw 8
private int[] queue; ZRPE-l_3:
my4\mi6P
public int get() { S{-f$Q*
return queue[1]; G@B*E%$9
} Tn /Ut}]O
22|"K**3J|
public void remove() { r 3|4gG
SortUtil.swap(queue,1,size--); 'd+:D'
fixDown(1); i0iez9B
} Y|:YrZSC
file://fixdown 6W$rY] h!
private void fixDown(int k) { [1Uz_HY["3
int j; i_NJ -K
while ((j = k << 1) <= size) { fQP,=
if (j < size %26amp;%26amp; queue[j] j++; 0`6),R'x
if (queue[k]>queue[j]) file://不用交换 rtus`A5p
break; ![).zi+m
SortUtil.swap(queue,j,k); +O4(a.
k = j; o_(0
} 7pP+5&*
} 95[wM6?J
private void fixUp(int k) { bb}?h]a
while (k > 1) { IqNpLh|[
int j = k >> 1; rpSr^slr
if (queue[j]>queue[k]) k8 u%$G
break; m9woredS,
SortUtil.swap(queue,j,k); >gnF]<
k = j; qfa}3k8et
} ~o i)Lf1
} 8?kP*tmcZ
j3{HkcjJG
} mTJ"l(,3
jFG5)t<D
} EavX8r
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SortUtil： @UV{:]f~e
BKX9SL]
package org.rut.util.algorithm; xG8`'SNY
0U%Xm[:
import org.rut.util.algorithm.support.BubbleSort; |/*pT1(&
import org.rut.util.algorithm.support.HeapSort; 4~Dax)
import org.rut.util.algorithm.support.ImprovedMergeSort; UUH;L
import org.rut.util.algorithm.support.ImprovedQuickSort; fx]eDA|$e
import org.rut.util.algorithm.support.InsertSort; nc&Jmo7
import org.rut.util.algorithm.support.MergeSort; HA1]M`&
import org.rut.util.algorithm.support.QuickSort; O)1E$#~
import org.rut.util.algorithm.support.SelectionSort; S+iP^*L,c
import org.rut.util.algorithm.support.ShellSort; Xo8DEr
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/** C38%H
* @author treeroot /K@$#x_{
* @since 2006-2-2 .yX>.>"T|
* @version 1.0 |AC6sfA+
*/ `.[ 8$
public class SortUtil { D'nL
public final static int INSERT = 1; p/3BD&6
public final static int BUBBLE = 2; I-bF{
public final static int SELECTION = 3; M/} aq
public final static int SHELL = 4; R:f7LRF/\
public final static int QUICK = 5; -%H%m`wD
public final static int IMPROVED_QUICK = 6; [IMQIX
public final static int MERGE = 7; :/i~y$t
public final static int IMPROVED_MERGE = 8; r@yD8D \
public final static int HEAP = 9; ami09JHy
+9C;<f
public static void sort(int[] data) { Z\'wm'
sort(data, IMPROVED_QUICK); 1}nm2h1 I
} Oy%Im8.-A#
private static String[] name={ :!']p2B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :~D];m
}; U!0E_J
hbfsHT
private static Sort[] impl=new Sort[]{ ;_N"Fdl
new InsertSort(), [;FofuZ
new BubbleSort(), ?@DNsVwb
new SelectionSort(), FT(iX`YQ
new ShellSort(), L+t[&1cW
new QuickSort(), A0>x9XSkJ
new ImprovedQuickSort(), s1=+::
new MergeSort(), . ,R4WA,
new ImprovedMergeSort(), m8HYWzN
new HeapSort() A9;0y jae
}; X4'kZ'Sy<
)2V@p~k?
public static String toString(int algorithm){ iadkH]w
return name[algorithm-1]; Ihqs%;V
} c D7FfJ
fv2=B)8$
public static void sort(int[] data, int algorithm) { 4.'JLArw
impl[algorithm-1].sort(data); GS4_jvD-
} C_Gzv'C"L
.8(%4ejJ(
public static interface Sort { ;UpJ=?W
public void sort(int[] data); :Eo8v$W\RB
} />F.Nsujy
Hk9U&j$
public static void swap(int[] data, int i, int j) { T>F9Hs W
int temp = data; /AR]dcL@76
data = data[j]; D%gGRA
data[j] = temp; az2Xch]
} 0m&3?"5u
} ,E9d\+j