[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; 7#9fcfL
} ~8[`(/hj
int i1=l; }`uq:y
int i2=mid+1; RNX>I,2sh
for(int cur=l;cur<=r;cur++){ CbT ;#0
if(i1==mid+1) [ _&z+
data[cur]=temp[i2++]; YKa9]Q
else if(i2>r) 4o( Q+6m
data[cur]=temp[i1++]; p$6L_ *$
else if(temp[i1] data[cur]=temp[i1++]; &"X1w $
else ES[]A&tf
data[cur]=temp[i2++]; tSaD=#v
} 1( ]{tF
} =n MAw&`
tU>4?`)E
} =#vU$~a
]?hlpL
改进后的归并排序: <;dFiI-GO#
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package org.rut.util.algorithm.support; zHvW@A'F
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import org.rut.util.algorithm.SortUtil; :tLMh08h
QQUZneIDp
/** 2%j"E{J&
* @author treeroot h ?+vH{}j
* @since 2006-2-2 ,uS}wJAX
* @version 1.0 !]#;'
*/ F=$U.K~1?
public class ImprovedMergeSort implements SortUtil.Sort { .c_qMTm"
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private static final int THRESHOLD = 10; .vpx@_;]9
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/* iMp_1EXe
* (non-Javadoc) C0j`H(
* ^L's45&_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \-:4TuU
*/ Z]^O=kX7k
public void sort(int[] data) { rF . Oo0
int[] temp=new int[data.length]; D}bCMN<
mergeSort(data,temp,0,data.length-1); 8' +I8J0l
} C0'_bTfB
*g 2N&U
private void mergeSort(int[] data, int[] temp, int l, int r) { {7 nz:f
int i, j, k; R,W w/D
int mid = (l + r) / 2; Br"K{g?
if (l == r) 0u ,nSvch
return; hu-6V="^9
if ((mid - l) >= THRESHOLD) A,%NdM;t=5
mergeSort(data, temp, l, mid); J|dj`Z?
else @86I|cY
insertSort(data, l, mid - l + 1); H`8}w{ft&
if ((r - mid) > THRESHOLD) rh6m
mergeSort(data, temp, mid + 1, r); [u/Wh+
else fMRMQR=6B
insertSort(data, mid + 1, r - mid); W/<C$T4
/@K1"/fqH
for (i = l; i <= mid; i++) { o,=dm@j
temp = data; &y:SK)
} 6>/g`%`N
for (j = 1; j <= r - mid; j++) { e}W|wJ):j@
temp[r - j + 1] = data[j + mid]; MrpT5|t
} 'E#Bz"T
int a = temp[l]; x5W. 3*
int b = temp[r]; !a9/8U_>XF
for (i = l, j = r, k = l; k <= r; k++) { b$eZ>X
if (a < b) { rFYw6&;vOi
data[k] = temp[i++]; R"[U<^
a = temp; [!b=A:@
} else { wRj&k(?*
data[k] = temp[j--]; v,,Dz8!Ty
b = temp[j]; %weG}gCM
} RL1cx|
} %x|0<@b7-
} UoKXo*W2
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/** _9"%;:t
* @param data $oH?7sj
* @param l of?'FrU
* @param i X?q,m4+
*/ FFID<Lf/2
private void insertSort(int[] data, int start, int len) { NEX{vZkgw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0o-KjX?kP
} qX!P:M
} .06[*S
} w:o,mzuXK
} vrvOPLiQ
f;%\4TH?
堆排序： DsF<P@O6
ffS]%qa
package org.rut.util.algorithm.support; R3@$ao
!;;WS~no3
import org.rut.util.algorithm.SortUtil; 0^&-j.9
MbjMO"}
/** G,h=5y9_J
* @author treeroot ^`oyf{w@
* @since 2006-2-2 .wz.Jr`{
* @version 1.0 S(h+,+289
*/ \>r<z46x
public class HeapSort implements SortUtil.Sort{ %v 1NDhaXz
53X5&Bwh
/* (non-Javadoc) ':_1z5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hha^:,
*/ 3+2cD
public void sort(int[] data) { e2$k %c~
MaxHeap h=new MaxHeap(); o-%DL*^5
h.init(data); FTC,{$
for(int i=0;i h.remove(); G,JNUok
System.arraycopy(h.queue,1,data,0,data.length); x9VR>ux&
} fr([g?F%D
eU.HS78
private static class MaxHeap{ q~*>
;]xJC j
void init(int[] data){ l<=Y.P_2
this.queue=new int[data.length+1]; pcjb;&<
for(int i=0;i queue[++size]=data; 5t~p99#?
fixUp(size); 'J"m`a8no
} E]j2%}6Z%
} \dw*yZ^
QIZbAnn_
private int size=0; Id;YIycXe
l|p \8=
private int[] queue; ?:XbZ"25pJ
ZF6?N?t}h8
public int get() { HCTjFW>C
return queue[1]; o&b1-=MC2
} cq $)uF'c
p8a\> {
public void remove() { 2[R{IV8e
SortUtil.swap(queue,1,size--); beCTOmC
fixDown(1); ^&6'FE
} \<K@t=/ 6
file://fixdown UN6Du$]d
private void fixDown(int k) { ]Uee!-dZ
int j; NRgNW1#
while ((j = k << 1) <= size) { pv #uLo
if (j < size %26amp;%26amp; queue[j] j++; }tRY,f
if (queue[k]>queue[j]) file://不用交换 S.X*)CBB
break; {(MC]]'?
SortUtil.swap(queue,j,k); _.y0QkwV
k = j; 4tv}V:EO
} vPA {)l\K
} llP 5
private void fixUp(int k) { JD}"_,-
while (k > 1) { t^zmvPDK
int j = k >> 1; ">^O{X\
if (queue[j]>queue[k]) w0iv\yIRQ
break; HKZD*E((
SortUtil.swap(queue,j,k); 7$&3(#!N
k = j; N?mTAF'M
} o<r|YRzQl
} kxp, ZP
YYc.e T<
} b;XUv4~V
*.]M1
} b7_uT`<
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SortUtil： $<(FZb=
Zw`vPvb!
package org.rut.util.algorithm; Q(\U'|%J
8NRc+@f|m
import org.rut.util.algorithm.support.BubbleSort; <p74U( V
import org.rut.util.algorithm.support.HeapSort; !K~:crUV|S
import org.rut.util.algorithm.support.ImprovedMergeSort; w[S!U<9/
import org.rut.util.algorithm.support.ImprovedQuickSort; 8~>5k
import org.rut.util.algorithm.support.InsertSort; DL0i
import org.rut.util.algorithm.support.MergeSort; J<4egk4
import org.rut.util.algorithm.support.QuickSort; oSOO5dk:z
import org.rut.util.algorithm.support.SelectionSort; xF4>D!T%8
import org.rut.util.algorithm.support.ShellSort; tgPx!5U
Y]SX2kk(2
/** ~Yw`w2
* @author treeroot *$I5_A8,.
* @since 2006-2-2 8- U1Y
* @version 1.0 Qwm#6{5
*/ ;/Z9M"!u[
public class SortUtil { `Y~EL?
public final static int INSERT = 1; <[eE5X(
public final static int BUBBLE = 2; oS/cS)N20
public final static int SELECTION = 3; N=QeeAI}}m
public final static int SHELL = 4; @rO4BTi>O
public final static int QUICK = 5; y(!YN7_A
public final static int IMPROVED_QUICK = 6; P~5[.6gW
public final static int MERGE = 7; )Uv lEG']
public final static int IMPROVED_MERGE = 8; !5;A.f
public final static int HEAP = 9; jeM/8~^4-
[8o!X)
public static void sort(int[] data) { ^}gQh#
sort(data, IMPROVED_QUICK); m6 )sX&
} ktILKpHt"
private static String[] name={ lStYfO:<'v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JQhw>H9&
}; :q xd])-
Xo{|m[,
private static Sort[] impl=new Sort[]{ w,t>M_(N
new InsertSort(), =&J7 'nDP
new BubbleSort(), >+ZG{'!j
new SelectionSort(), JToc("V
new ShellSort(), ,(6U3W*bu
new QuickSort(), ;;9W/m~]
new ImprovedQuickSort(), b`=\<u8
new MergeSort(), J4Ix\r_
new ImprovedMergeSort(), ,&1DKx
new HeapSort() $&@L[[xl
}; K9#=@}!3L
S-^RZ"
public static String toString(int algorithm){ %YI Xk1
return name[algorithm-1]; UUf-G0/P
} dsx'l0q 'i
]5+db0
public static void sort(int[] data, int algorithm) { G/2| *H
impl[algorithm-1].sort(data); 0jlwL
} y7;i4::A\
rHir> p
public static interface Sort { meHnT9a^
public void sort(int[] data); &:i|;^^2
} J;K-Pv+
f xWW"B*A
public static void swap(int[] data, int i, int j) { 0'giAA
int temp = data; %V>Ss9;/8
data = data[j]; NDJIaX:]
data[j] = temp; iBq|]
} pohA??t2:
} ~VRt6C