[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; Djc-f
} vK+reXE
int i1=l; A-uIZ zC
int i2=mid+1; LWTPNp:"{w
for(int cur=l;cur<=r;cur++){ z7AWWr=H
if(i1==mid+1) flC%<V%'-
data[cur]=temp[i2++]; =&pLlG
else if(i2>r) y9d"sqyh
data[cur]=temp[i1++]; 6i+,/vr
else if(temp[i1] data[cur]=temp[i1++]; -3)jUzD
else [|c%<|d2
data[cur]=temp[i2++]; j-R*!i
} pw4^E|X
} itirh"[
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} *IWW,@0
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改进后的归并排序: "|1iz2L
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package org.rut.util.algorithm.support; IKPGqoM
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import org.rut.util.algorithm.SortUtil; mgVYKZWL-i
$57b.+2n
/** p$|7T31 *
* @author treeroot eZU9L/w:
* @since 2006-2-2 @j}%{Km]Y
* @version 1.0 m#8PX$_
*/ ]7K2S{/o{
public class ImprovedMergeSort implements SortUtil.Sort { 7`A]X,:
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private static final int THRESHOLD = 10; <]1,L%
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/* |]@Pq[Hn|
* (non-Javadoc) TE+>|}]R
* rqmb<# Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) egG<"e*W}N
*/ :yD>Tn;1
public void sort(int[] data) { HLwMo&*rA
int[] temp=new int[data.length]; r#4/~a5i~
mergeSort(data,temp,0,data.length-1); lD3nz<p
} 37jxl+
r*l3Hrho~K
private void mergeSort(int[] data, int[] temp, int l, int r) { ^c.D&y%5
int i, j, k; z dgS@g
int mid = (l + r) / 2; 1]~w?)..'
if (l == r) +Z|3[#W
return; u>:(MARsR
if ((mid - l) >= THRESHOLD) /o m++DxV
mergeSort(data, temp, l, mid); ;H~<.QW
else U3V5Jor#
insertSort(data, l, mid - l + 1); 1s.2z[B~
if ((r - mid) > THRESHOLD) |SjRss:i+
mergeSort(data, temp, mid + 1, r); ?BfE*I$\h
else (VjU,'h
insertSort(data, mid + 1, r - mid); `2@.%s1o=
R'tKJ_VI
for (i = l; i <= mid; i++) { rniM[7K
temp = data; \/Mx|7<
} ,oA<xP-*
for (j = 1; j <= r - mid; j++) { esnq/
temp[r - j + 1] = data[j + mid]; 6ABK)m-y
} :+PE1=v
int a = temp[l]; ={ms@/e/T
int b = temp[r]; {JP q.A
for (i = l, j = r, k = l; k <= r; k++) { y')OmR2h
if (a < b) { .M^[/!
data[k] = temp[i++]; I!S Eb
a = temp; !>`Fg>uy
} else { JaRsm'SIk~
data[k] = temp[j--]; n^T,R
b = temp[j]; kUgfFa#_
} V3t#kv
} @GFB{ ;=
} Y"MHs0O5>
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/** ~x9]?T
* @param data zd=O;T;.
* @param l ?qaWt/m
* @param i >SK:b/i
*/ (6S'wb
private void insertSort(int[] data, int start, int len) { +1y$#~dl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]A3
} t+8e?="
} ;Y^'$I2fR#
} 3OZPy|".ax
} *i]?J
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堆排序： cgMF?;V
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package org.rut.util.algorithm.support; X@\W* nq
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import org.rut.util.algorithm.SortUtil; g|>LT_
sCFxn
/** kUf i
* @author treeroot (aa2uctTn
* @since 2006-2-2 {rUg,y{v
* @version 1.0 eluN~T:W
*/ @&ZQDi
public class HeapSort implements SortUtil.Sort{ yWi-ic [n
DW. w=L|5R
/* (non-Javadoc) RSp wU;o6z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .$18%jH#
*/ $8=|<vt
public void sort(int[] data) { } a9Ah:.7/
MaxHeap h=new MaxHeap(); R c+olJ^5
h.init(data); T-en|.
for(int i=0;i h.remove(); ^viabkf C
System.arraycopy(h.queue,1,data,0,data.length); _p-e)J$7
} &J>e;X
N*o{BboK;
private static class MaxHeap{ UZyg_G6
@AEH?gOX
void init(int[] data){ LjI`$r.B
this.queue=new int[data.length+1]; X8$i*#D
for(int i=0;i queue[++size]=data; .:$(o&
fixUp(size); 8W\yM;'
} _}R[mr/
} zt(lV
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private int size=0; _=GjJ~2n
$4nAb^/
private int[] queue; : {p'U2
d y HC8
public int get() { "b} mVrFh
return queue[1]; 8s1nE_3
} vYed_'_
!D#"+&&G8
public void remove() { hmu>s'
SortUtil.swap(queue,1,size--); 7Y5r3a}%
fixDown(1); [.gk{> #
} vd%g'fTy9
file://fixdown 4)S99|1
private void fixDown(int k) { zjpZ] $
int j; :ky`)F`
while ((j = k << 1) <= size) { wjA wJOw|
if (j < size %26amp;%26amp; queue[j] j++; >JyS@j}
if (queue[k]>queue[j]) file://不用交换 H7zN|NdNw
break; jRJG .hcB5
SortUtil.swap(queue,j,k); xZ'fer`&
k = j; 'C1lP)S5
} ytZo0pad
} kxMvOB$
private void fixUp(int k) { paqGW]
while (k > 1) { *N">93:
int j = k >> 1; =;rLv7(a
if (queue[j]>queue[k]) SqM>xm
break; 0q}i5%m7
SortUtil.swap(queue,j,k); Z0,jg)sA4
k = j; V}jGxt0
} K*/oWYM]
} D*M `qPX~
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} Q{l,4P
bA^uzE
} aLa<zEssz
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SortUtil： azPH~'E'
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package org.rut.util.algorithm; u8Ys2KLpL
2n<Mu Q]
import org.rut.util.algorithm.support.BubbleSort; Qs&;MW4q
import org.rut.util.algorithm.support.HeapSort; G4* LO
import org.rut.util.algorithm.support.ImprovedMergeSort; m\&|#yq
import org.rut.util.algorithm.support.ImprovedQuickSort; >q"dLZ
import org.rut.util.algorithm.support.InsertSort; `i.BB jx`
import org.rut.util.algorithm.support.MergeSort; ,mHME~
import org.rut.util.algorithm.support.QuickSort; Y^fw37b
import org.rut.util.algorithm.support.SelectionSort; \ruQx)5M
import org.rut.util.algorithm.support.ShellSort; Aa ~W,
r48|C{je-
/** TeHJj`rdAU
* @author treeroot O~3 A>j
* @since 2006-2-2 u{sHuVl
* @version 1.0 L;Ff(0x|
*/ .shi?aWm
public class SortUtil { :zY4phR
public final static int INSERT = 1; 2"IV
public final static int BUBBLE = 2; 8y LcTA$T
public final static int SELECTION = 3; }]x \ `}o
public final static int SHELL = 4; /K:r4Kw
public final static int QUICK = 5; }Fe6L;^;
public final static int IMPROVED_QUICK = 6; @{Rb]d?&F?
public final static int MERGE = 7; ZQ`8RF *v
public final static int IMPROVED_MERGE = 8; -xn-Af!v
public final static int HEAP = 9; Z-iU7 O
%7#<K\])
public static void sort(int[] data) { ;UQGi}?CD
sort(data, IMPROVED_QUICK); %_(vSpk
} FM{f{2j
private static String[] name={ $L*gtZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q0.!T0i
}; ^ZwZze:2
I\l&'Q^0@
private static Sort[] impl=new Sort[]{ V*vQNPey
new InsertSort(), -SsgW
new BubbleSort(), r h*F
new SelectionSort(), Qi18q|l8v
new ShellSort(), ] K$YtM^
new QuickSort(), 7^eyO&4z
new ImprovedQuickSort(), JipNI8\r
new MergeSort(), %3z[;&*3O
new ImprovedMergeSort(), ^ja]e%w#
new HeapSort() yXNr[7
}; Q]WBH_j
:?M_U;;z2+
public static String toString(int algorithm){ DQG%`-J
return name[algorithm-1]; GcV/_Y
} btW#ebm
PmuG(qg
public static void sort(int[] data, int algorithm) { fn}E1w
impl[algorithm-1].sort(data); ~+Wx\:TT
} vjEDd`jYZ
K~L&Z?~|E
public static interface Sort { Z RVt2
public void sort(int[] data); NI?O
} K#R]of~/
dxeiN#(XT
public static void swap(int[] data, int i, int j) { ,/f\
int temp = data; C[7!pd
data = data[j]; JwG(WLb:
data[j] = temp; 0D5Z#iW>1
} q5f QTV
} ]#o;`5'