[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; + ,%&e
} B|R@5mjm
int i1=l; Sx708`/Ep
int i2=mid+1; ]Y%Vio
for(int cur=l;cur<=r;cur++){ 9`1O"R/
if(i1==mid+1) .LZwuJ^;
data[cur]=temp[i2++]; ABQa 3{v
else if(i2>r) )[PtaPWeT
data[cur]=temp[i1++]; v>$'iT~l
else if(temp[i1] data[cur]=temp[i1++]; >hPQRd
else SOIHePmwK
data[cur]=temp[i2++]; 1M}5>V{
} /.3}aj;6
} RZHd9v$
2[Z,J%:0
} N!ls j \-
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改进后的归并排序: ^Y@\1fX 4e
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package org.rut.util.algorithm.support; VRI0W`
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import org.rut.util.algorithm.SortUtil; [Grxw[(_:
T+*%?2>q"
/** 6%t1bM a
* @author treeroot o<[#0T^K
* @since 2006-2-2 |_] Q$q[[%
* @version 1.0 8kU!8^mH
*/ C"!gZ8*\!9
public class ImprovedMergeSort implements SortUtil.Sort { o9JMH.G
v*;-yG&
private static final int THRESHOLD = 10; ex::m&
]b\yg2
/* q?4p)@#
* (non-Javadoc) -n=^U
* Ont%eC\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `}(b2Hc>
*/ Jz7!4mu
public void sort(int[] data) { e8pG"`wM8
int[] temp=new int[data.length]; F ~^Jmp7Y
mergeSort(data,temp,0,data.length-1); `V`lo,"\
} ht2\y&si
PK{acen
private void mergeSort(int[] data, int[] temp, int l, int r) { =<{np
int i, j, k; )+[ gd/<C.
int mid = (l + r) / 2; P0W*C6&71|
if (l == r) *pSQU=dmS
return; d{SG Cr 9d
if ((mid - l) >= THRESHOLD) +Af"f' )
mergeSort(data, temp, l, mid); [U5\bX@$
else kS_(wpA
insertSort(data, l, mid - l + 1); `Gn50-@
if ((r - mid) > THRESHOLD) s$cK(S#
mergeSort(data, temp, mid + 1, r); b6U2GDm\s
else Y&S24aql
insertSort(data, mid + 1, r - mid); vr6MU<
cd(GvX'
for (i = l; i <= mid; i++) { H,DM1Z9rz
temp = data; ~F4fFQ-yy
} E~]R2!9
for (j = 1; j <= r - mid; j++) { 9fhsIe
temp[r - j + 1] = data[j + mid]; ;\]b T;#
} zG ^$"f2
int a = temp[l]; P(H8[,
int b = temp[r]; PcA2/!a
for (i = l, j = r, k = l; k <= r; k++) { )TVFtI=,NN
if (a < b) { mS~o?q-n
data[k] = temp[i++]; *v9 2
a = temp; d/BM&r
} else { LcUh;=r}&
data[k] = temp[j--]; I1pWaQ0
b = temp[j]; aMtsmL?=
} JT3-AAi[Z
} ^>i63Yc
} K_RjX>q%N
q(`/Vo4g(
/** _H j!2 '
* @param data Xs~[&
* @param l ;_rF;9z9
* @param i ,1[q^-9
*/ '}fzX2Q#
private void insertSort(int[] data, int start, int len) { )n2 re?S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %Z):>'
} "uaMk}[ <!
} lfqiyYFm
} t m7^yn:
} f"%{%M$K
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堆排序： wE?'Cl
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package org.rut.util.algorithm.support; B"!l2
a-=8xs'
import org.rut.util.algorithm.SortUtil; @\f^0^G
] lrWgm
/** KY51rw.
* @author treeroot _3TY,l~
* @since 2006-2-2 n=y[CKS
* @version 1.0 %-c*C$
*/ hw= Ft4L
public class HeapSort implements SortUtil.Sort{ 3HcQ(+Z
nlW +.a[
/* (non-Javadoc) ;[M}MFc/`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9f&C
*/ >pp5;h8!
public void sort(int[] data) { "nw;NIp!
MaxHeap h=new MaxHeap(); b[o"7^H
h.init(data); >zXsNeGQR
for(int i=0;i h.remove(); &6ZD136
System.arraycopy(h.queue,1,data,0,data.length); e[&L9U6GW-
} f;W|\z'
7?GIS '
private static class MaxHeap{ 8B\2Zfe
^(f"v e#7v
void init(int[] data){ ^/\Of{OZ-
this.queue=new int[data.length+1]; PH+S};Uxv
for(int i=0;i queue[++size]=data; B{'( L|
fixUp(size); (9Ux{@$o[
} _j< K=){
} G 8g<>d{j
l'/R&`-n
private int size=0; ;/r1}tl+3>
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private int[] queue; Kx;eaz:gx
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public int get() { <vONmE a
return queue[1]; __|+w<]
} .QZaGw=,z
CGY]r.O*
public void remove() { -f%'
SortUtil.swap(queue,1,size--); q*_/to
fixDown(1); %oZ6l*
} 925|bX6I
file://fixdown @?yX!_YC
private void fixDown(int k) { ]yK7PH-{L
int j; BG6B:
while ((j = k << 1) <= size) { OY;*zk
if (j < size %26amp;%26amp; queue[j] j++; Gd-'Z_b
if (queue[k]>queue[j]) file://不用交换 <<+\X:,
break; G Uon/G8
SortUtil.swap(queue,j,k); "4riSxEyF
k = j; j4jTSLQ\
} =g9*UzA"O
} |=`~-i2W
private void fixUp(int k) { /aZ+T5O
while (k > 1) { VUPXO
int j = k >> 1; "alyfyBu'M
if (queue[j]>queue[k]) x4;"!Kq\
break; JtEo'As:[
SortUtil.swap(queue,j,k); 1IC~e^"
k = j; 5ni~Q 9b
} T 6)bD&
} b{L/4bu
r:f[mk"-"A
} S- pV_Ff
K/i*w<aPb7
} *h!28Ya(~
8ZM&(Lz7u
SortUtil： *K|W /'_&
pA9+Cr!0Q
package org.rut.util.algorithm; &7PG.Ff!r
nExU#/*~^
import org.rut.util.algorithm.support.BubbleSort; wO'TBP
import org.rut.util.algorithm.support.HeapSort; YG@t5j#b
import org.rut.util.algorithm.support.ImprovedMergeSort; 9 7GV2]-M
import org.rut.util.algorithm.support.ImprovedQuickSort; =t9\^RIx)?
import org.rut.util.algorithm.support.InsertSort; Cs9.&Y
import org.rut.util.algorithm.support.MergeSort; 8u6:=fxb
import org.rut.util.algorithm.support.QuickSort; VH9dleZ
import org.rut.util.algorithm.support.SelectionSort; /{+y2.{j
import org.rut.util.algorithm.support.ShellSort; Gft%Mq v
LhOa{1SY
/** M+U9R@
* @author treeroot [@J/eWB
* @since 2006-2-2 X-6de>=
* @version 1.0 $c0h.t
*/ e+~\+:[?
public class SortUtil { ,]46I.]
public final static int INSERT = 1; 4]?<hH9
public final static int BUBBLE = 2; -:|?h{q?u
public final static int SELECTION = 3; `o=q%$f#k~
public final static int SHELL = 4; }4 )H
public final static int QUICK = 5; d:BG#\e]v
public final static int IMPROVED_QUICK = 6; )wC?T
public final static int MERGE = 7; }&cu/o4
public final static int IMPROVED_MERGE = 8; (gP)%
public final static int HEAP = 9; ^ DaBz\
^hc!FD
public static void sort(int[] data) { mq@6Q\Z+
sort(data, IMPROVED_QUICK); iiT"5`KY
} >/l? g5{
private static String[] name={ i,>khc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vHyC;4'
}; zHA!%>%'
R3x3]]D
private static Sort[] impl=new Sort[]{ qTdheX/
new InsertSort(), TE3lK(f
new BubbleSort(), d,+Hd2o^X
new SelectionSort(), oI }VV6vO
new ShellSort(), ?}wk.gt>
new QuickSort(), #M9~L[nFS
new ImprovedQuickSort(), "I3@m%qv
new MergeSort(), $"+djI?E9
new ImprovedMergeSort(), B3We|oe!
new HeapSort() ;_c;0)
}; ]Lf{Jboo
e?0l"
public static String toString(int algorithm){ Q6PHpaj
return name[algorithm-1]; 4!Fo$9
} NjVYLn<.r
&dqLP95
public static void sort(int[] data, int algorithm) { C _'%NlJ'
impl[algorithm-1].sort(data); .+PI}[g
} u+Y\6~=+
%|auAq&w
public static interface Sort { fObg3S92
public void sort(int[] data); v- 2:(IV
} `=4r+
QoI3>Oj=
public static void swap(int[] data, int i, int j) { W0dSsjNio
int temp = data; zZL6z4g
data = data[j]; uaT!(Y6
data[j] = temp; 8EW_V$>R
} f.D?sHAn
} MqW7cjg