[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; %@6}GmK^
} jW 3c"
int i1=l; LILQ\I<<'
int i2=mid+1; <y?r!l=Am
for(int cur=l;cur<=r;cur++){ /\4'ddGU
if(i1==mid+1) C,v(:ZE$J7
data[cur]=temp[i2++]; {o.FlX
else if(i2>r) *tK\R&4,4s
data[cur]=temp[i1++]; 'LO^<
else if(temp[i1] data[cur]=temp[i1++]; n6BQk2l
else -(~!Jo_*'
data[cur]=temp[i2++]; Yi$vg
} *U P@9D
} v#U"pn|M
:{q<{^c
} u[DfzH
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改进后的归并排序: [< &oF
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package org.rut.util.algorithm.support; yrC7F`.
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import org.rut.util.algorithm.SortUtil; V{:A3C41
USM4r!x
/** xUa{1!Y8
* @author treeroot YLiSbLz1
* @since 2006-2-2 4\4FolsK
* @version 1.0 F!]lU`z)=
*/ 7~5ym15*
public class ImprovedMergeSort implements SortUtil.Sort { SV~cJ]F
.K p
private static final int THRESHOLD = 10; >8qQK r\"
paD!Z0v&
/* 7r~~Y%=C|
* (non-Javadoc) Lcg)UcB-#
* g.zEn/SM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yL2o}ZbS
*/ F)'.g d
public void sort(int[] data) { &i$ldR
int[] temp=new int[data.length]; Stu4t==U
mergeSort(data,temp,0,data.length-1); ,v';>.]
} v33dxZ'
'U\<IL#U
private void mergeSort(int[] data, int[] temp, int l, int r) { [Z}9>~m
int i, j, k; b"vv>Q~U
int mid = (l + r) / 2; V;:jZpG
if (l == r) [&#/]Ul'
return; 3< 2}V
if ((mid - l) >= THRESHOLD) aD=A^ktx
mergeSort(data, temp, l, mid); SU/BQ3
else *rIk:FehLB
insertSort(data, l, mid - l + 1); '>' wK.
if ((r - mid) > THRESHOLD) 5sx1Zq7
mergeSort(data, temp, mid + 1, r); OslL~<
else cM$P`{QrM
insertSort(data, mid + 1, r - mid); 8>WC5%f*
2&^]k`Aj6D
for (i = l; i <= mid; i++) { ihP|E,L=L
temp = data; \4-"L>
} OeS\7
for (j = 1; j <= r - mid; j++) { ng_^
temp[r - j + 1] = data[j + mid]; y*tZ !m2Gg
} C ihAU"
int a = temp[l]; t\%HX.8[;%
int b = temp[r]; S'_-G;g.
for (i = l, j = r, k = l; k <= r; k++) { 7:)n$,31FW
if (a < b) { s3R(vd
data[k] = temp[i++]; K%F,='P}
a = temp; $0lD>yu
} else { MBhWMCN2
data[k] = temp[j--]; BE_ay-
b = temp[j]; .7.b:Dn0
} 9/ibWa\.
} r?Wk<>%>
} .xH5fMj,"
83Q4On
/** (+FfB"3]
* @param data GJtZ&H
* @param l k|lcc^[0
* @param i }DK7'K
*/ znaUBv_
private void insertSort(int[] data, int start, int len) { 8\5 T3AF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yl1gx
} C86J IC"
} Dm-zMCf}Q
} I/L_@X<*r
} 7w/4QiI
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堆排序： fDvl/|62{
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package org.rut.util.algorithm.support; Xt@Z}B))pu
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import org.rut.util.algorithm.SortUtil; INi]R^-
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/** b7wvaRe.
* @author treeroot V&\[)D'c
* @since 2006-2-2 +(1zH-^.
* @version 1.0 )XzI #iQ
*/ X .5aMm
public class HeapSort implements SortUtil.Sort{ HP3lz,d
w6W}"Uw
/* (non-Javadoc) /|eA9 ]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jg\Z;_!W
*/ ZfgJ.<<
public void sort(int[] data) { N,;5{y1;J
MaxHeap h=new MaxHeap(); S7L=#+Z
h.init(data); I$0)Px%z
for(int i=0;i h.remove(); ,Qnd3[2[
System.arraycopy(h.queue,1,data,0,data.length); oze&
} ~?FpU
)>`G
private static class MaxHeap{ 6DuEL=C
[3--(#R\}?
void init(int[] data){ 7TDy.]
this.queue=new int[data.length+1]; `R=HKtr?
for(int i=0;i queue[++size]=data; |]ZYa.+:
fixUp(size); =MLcm^b
} OC<5E121>Y
} .P MZX%*v
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private int size=0; Q&eQQ6b^Ih
M#=] k
private int[] queue; cQ"~\
}C>{uXv
public int get() { @Q/-s9b
return queue[1]; 82QGS$0V
} 8_6Q~
OPx`u
public void remove() { (;57Vw
SortUtil.swap(queue,1,size--); *]VFvh
fixDown(1); bdibaN-h
} '_/Bp4i
file://fixdown fmiz,$O4?
private void fixDown(int k) { x>*Drm 7
int j; v!ujj5-$I
while ((j = k << 1) <= size) { uec!RKE
if (j < size %26amp;%26amp; queue[j] j++; x\s|n{
if (queue[k]>queue[j]) file://不用交换 ^,;z|f'%*
break; Tp_L%F
SortUtil.swap(queue,j,k); KFvQ
k = j; j;fpQ_KL
} [zlN!.Z
} X~<("
private void fixUp(int k) { *EZHJt9
while (k > 1) { U9A~9"O
int j = k >> 1; ZOQTINf
if (queue[j]>queue[k]) /s[l-1zW
break; eL\;Nf+Zp
SortUtil.swap(queue,j,k); >ey\jDr#O
k = j; 43Qtj$F
} 7qg{v9|,
} ]jaQ[g$F
P3nb2.
} N.]qU d
8qu2iPOcZ
} V%YiAr>
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SortUtil： zOqn<Y@
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package org.rut.util.algorithm; KOp162X>r
#P?6@\
import org.rut.util.algorithm.support.BubbleSort; >9(hUH
import org.rut.util.algorithm.support.HeapSort; ~D5\O6mU-
import org.rut.util.algorithm.support.ImprovedMergeSort; OQ>x5?um
import org.rut.util.algorithm.support.ImprovedQuickSort; mysetv&5
import org.rut.util.algorithm.support.InsertSort; R&Jm +3N
import org.rut.util.algorithm.support.MergeSort; CO2C{~Q5
import org.rut.util.algorithm.support.QuickSort; ]zQo>W$
import org.rut.util.algorithm.support.SelectionSort; w[!^;#
import org.rut.util.algorithm.support.ShellSort; gUpb4uN
#z2rzM@/:
/** 4)"n RjGg
* @author treeroot }f8Uc+
* @since 2006-2-2 u#V5?i
* @version 1.0 `>?ra-
*/ { Q`QX`#
public class SortUtil { Z6_N$Z.A
public final static int INSERT = 1; G-He" 4& $
public final static int BUBBLE = 2; OV%Q3$15
public final static int SELECTION = 3; c=L2%XPP
public final static int SHELL = 4; ,>:;#2+og
public final static int QUICK = 5; Sk:ws&D1u
public final static int IMPROVED_QUICK = 6; t0nI('LX,
public final static int MERGE = 7; k7>|q"0C
public final static int IMPROVED_MERGE = 8; *hQTO=WF
public final static int HEAP = 9; 20iq2
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public static void sort(int[] data) { spGB)k,^
sort(data, IMPROVED_QUICK); |/2y-[;:
} yI ld75S`
private static String[] name={ eXKo.JL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B|4X}*@SX
}; )~+e`q
tvu!< dxZ
private static Sort[] impl=new Sort[]{ E7CH^]x
new InsertSort(), Wo7F
new BubbleSort(), >OG:vw)E
new SelectionSort(), phn9:{TI
new ShellSort(), nD)K}4
new QuickSort(), P4F3Dc
new ImprovedQuickSort(), C!R1})_^
new MergeSort(), dd\n8f
new ImprovedMergeSort(), O=$~O\}b
new HeapSort() n< ud> JIb
}; ~<k,#^"}X
<%Ostqj
public static String toString(int algorithm){ i%g#+Gw
return name[algorithm-1]; L dm?JrU
} '^Ql]% _
` bdZ/*E
public static void sort(int[] data, int algorithm) { .hba*dV
impl[algorithm-1].sort(data); z%e8K(
} K,w"_T
UQ+?\wi*
public static interface Sort { F@*+{1R
public void sort(int[] data); )QG<f{wS
} ;Wl+zw
CWNx4)ZGw
public static void swap(int[] data, int i, int j) { 8S<@"v
int temp = data; B?)@u|0
data = data[j]; raCi 8
data[j] = temp; uFLx
} d ,Y#H0`
} &CIVL#];e