[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; .I{b]6
} DpIv <m]
int i1=l; uX{n#i,~L
int i2=mid+1; iw<#V&([J
for(int cur=l;cur<=r;cur++){ ZF :e6em
if(i1==mid+1) ^o+}3=
data[cur]=temp[i2++]; :+ef|,:`/
else if(i2>r) v\*43RL
data[cur]=temp[i1++]; ]%IcUd}
else if(temp[i1] data[cur]=temp[i1++]; "J]_B
else D'aq^T'
data[cur]=temp[i2++]; H{'<v|I
} *Dld?Q
} hkw;W[ZWa
-SaH_Nuj
} _Zya GDv
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改进后的归并排序: <Vyv)#32o3
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package org.rut.util.algorithm.support; &eV& +j
n(.y_NEgV!
import org.rut.util.algorithm.SortUtil; 3vPb}
5EDN 9?a
/** e&f9/rfx
* @author treeroot FR9<$
* @since 2006-2-2 FjIS:9^)t5
* @version 1.0 >TUs~
*/ <A&mc,kj
public class ImprovedMergeSort implements SortUtil.Sort { >*H>'O4
R6~x!
private static final int THRESHOLD = 10; !=@Lyt)_b
h)BRSs?v_D
/* b:/;
* (non-Javadoc) 6>v`6
* MZf$8R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }^WQNdws56
*/ %3scz)4$
public void sort(int[] data) { c%v[p8 %
int[] temp=new int[data.length]; U>6MT@\
mergeSort(data,temp,0,data.length-1); Ed,`1+
} O{a<f7 W
qd"1KzQWO
private void mergeSort(int[] data, int[] temp, int l, int r) { Rkm1fYf
int i, j, k; ')t :!#
int mid = (l + r) / 2; kA?a}
if (l == r) xc[@lr
return; xRYL{+
if ((mid - l) >= THRESHOLD) )ALPMmlRs
mergeSort(data, temp, l, mid); zu'Uau
else aYr?J Ol
insertSort(data, l, mid - l + 1); h`dtcJ0
if ((r - mid) > THRESHOLD) ~C=I{qzF+
mergeSort(data, temp, mid + 1, r); $A"kHS7T
else .GUm3b
insertSort(data, mid + 1, r - mid); *JE%bQ2Q
B1T:c4:N
for (i = l; i <= mid; i++) { 90> (`pI=
temp = data; w@Uw8b
} <l]P <N8^
for (j = 1; j <= r - mid; j++) { %eWzr
temp[r - j + 1] = data[j + mid]; >_P7k5Y^
} }#'wy
int a = temp[l]; tAFKq>\
int b = temp[r]; ,dn9tY3
for (i = l, j = r, k = l; k <= r; k++) { \Km!#:
if (a < b) { P'f =r%
data[k] = temp[i++]; `<!Nk^2ap
a = temp; t!QuM_i3
} else { rF:C({y
data[k] = temp[j--]; 1>P[3Y@}
b = temp[j]; xgHR;USH
} .gTla
} 8uq^Q4SU
} S9R(;
'?dO[iQ$:
/** r_nB-\
* @param data e5G)83[=
* @param l HE58A.Q&
* @param i <WFA3
*/ 52?zBl`|
private void insertSort(int[] data, int start, int len) { stuj,8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HA&7 ybl
} Fw5|_@&k
} sC >_ulkoa
} /aS=vjs
} K ;\~otR^
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堆排序： EdFCaW}""
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package org.rut.util.algorithm.support; %@tKcQ
j8n_:;i*
import org.rut.util.algorithm.SortUtil; HS>(y2}'
V/|).YG2
/** :T^!<W4
* @author treeroot wKOljE6d
* @since 2006-2-2 Pyh+HD\
* @version 1.0 \7rAQ[\#V
*/ .nN=M>#/
public class HeapSort implements SortUtil.Sort{ 4x7(50hp#
6. N?=R
/* (non-Javadoc) ]<b$k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uytq,3Gj6
*/ sd4eJ
public void sort(int[] data) { X`#,*HkK
MaxHeap h=new MaxHeap(); oSVo~F
h.init(data); @>`+eg][?P
for(int i=0;i h.remove(); <vMna< /d
System.arraycopy(h.queue,1,data,0,data.length); K$v SdpC
} rEz-\jLD~
+8qtFog$\g
private static class MaxHeap{ 9V&}%
PdiP5S }/
void init(int[] data){ .T~<[0Ex+U
this.queue=new int[data.length+1]; =k.:XblEe[
for(int i=0;i queue[++size]=data; EdGA#i3
fixUp(size); ,fWQSc\}
} wM.z/r\p
} g4b-~1[S
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private int size=0; fP3e{dVf
cs[_TJo
private int[] queue; EWOS6Yg7
p7 s#j
public int get() { kc*zP=
return queue[1]; )Z6bMAb0'N
} ZEY="pf
TljN!nv]
public void remove() { t^_0w[
SortUtil.swap(queue,1,size--); YywiY).]@
fixDown(1); k3[rO}>s
} u.v 5!G
file://fixdown _N8Tu~lqV
private void fixDown(int k) { *R9s0;&:
int j; G!]%xFwYa
while ((j = k << 1) <= size) { ,RmXZnWY
if (j < size %26amp;%26amp; queue[j] j++; h>ZNPP8N
if (queue[k]>queue[j]) file://不用交换 Oi#4|*b{W
break; ]vj.s/F~
SortUtil.swap(queue,j,k); 758`lfz=_
k = j; nW)-bAV<
} 5cc;8i
} :`u?pc27Sm
private void fixUp(int k) { WFWQ;U{|
while (k > 1) { ^gw htnI
int j = k >> 1; [6 d~q]KH
if (queue[j]>queue[k]) ^RL#(O
break; nc<wDE6
SortUtil.swap(queue,j,k); 5x$/.U
k = j; `O~NT'Ed8
} Mc8|4/<Z
} l^`& Tnzv
2MT_5j5[N
} lT.Q)(
t<~WDI|AN
} y{&k`H
:~uvxiF
SortUtil： Yz<,`w5/6~
V+\L@mz;
package org.rut.util.algorithm; nP]tc
Q?"o.T';
import org.rut.util.algorithm.support.BubbleSort; Za,MzKd=
import org.rut.util.algorithm.support.HeapSort; @8keLrp
import org.rut.util.algorithm.support.ImprovedMergeSort; g%C!)UbT
import org.rut.util.algorithm.support.ImprovedQuickSort; K4T#8K]aZF
import org.rut.util.algorithm.support.InsertSort; $}&r.=J".
import org.rut.util.algorithm.support.MergeSort; cnJL*{H<2
import org.rut.util.algorithm.support.QuickSort; '5^$v{
import org.rut.util.algorithm.support.SelectionSort; g/*x;d=
import org.rut.util.algorithm.support.ShellSort; m(2(Caz{
6d4e~F
/** bx!uHL=
* @author treeroot 2bJqZ,@
* @since 2006-2-2 Lj]I7ICNh
* @version 1.0 .&z/p3 1
*/ 4)]w"z0Pc
public class SortUtil { mT]+wi&
public final static int INSERT = 1; 01N]|F:
public final static int BUBBLE = 2; a#i85su
public final static int SELECTION = 3; ^pI&f{q
public final static int SHELL = 4; v?AQ&'Fk
public final static int QUICK = 5; CMQlxX?
public final static int IMPROVED_QUICK = 6; !WTZ=|
public final static int MERGE = 7; x"N{5
public final static int IMPROVED_MERGE = 8; g>k"R4
public final static int HEAP = 9; 'eM90I%(
t1LIZ5JY
public static void sort(int[] data) { =1!,A
sort(data, IMPROVED_QUICK); \VL_
} `/|S.a#g
private static String[] name={ eA4dDKX+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xg:r5Z/|)
}; 25bbuhss
D\~s$.6B
private static Sort[] impl=new Sort[]{ ;N+ v x
new InsertSort(), {J aulg
new BubbleSort(), /5x~3~
new SelectionSort(), 4blw9x N
new ShellSort(), It5U=PU
new QuickSort(), * ':LBc=%
new ImprovedQuickSort(), cImOZx
new MergeSort(), jCJbmEfo9@
new ImprovedMergeSort(), <5Ye')+
new HeapSort() os:/-A_m
}; ]^f7s36
8|-j]
public static String toString(int algorithm){ oK-T@ &-
return name[algorithm-1]; MU }<-1
} [Ej#NHs
\BRxdK'
public static void sort(int[] data, int algorithm) { UxGr+q
impl[algorithm-1].sort(data); *8QESF9
} N}$$<i2o
_oV;Y`_
public static interface Sort { qcNu9Ih
public void sort(int[] data); >M}\_c=
} | c:E)S\
R04%;p:k#
public static void swap(int[] data, int i, int j) { k!&G;6O-
int temp = data; |igr3p5Fw
data = data[j]; PIZnzZ@Z;
data[j] = temp; "7]YvZYu0
} >DFpL$oP
} 5hhiP2q